diff options
author | Jacob Vosmaer (GitLab) <jacob@gitlab.com> | 2017-01-09 16:11:34 +0300 |
---|---|---|
committer | Jacob Vosmaer (GitLab) <jacob@gitlab.com> | 2017-01-09 16:11:34 +0300 |
commit | 51ee25085003d4d8185a11fb427445804935c115 (patch) | |
tree | 36dcbcd6122c40265d375e70b362819f8217978d | |
parent | 2384dbd25a09851c38bad4fd55d24fd8d7dbccb7 (diff) | |
parent | c8fbb5710967df95dfe1ecbbce72bdb892d53b6e (diff) |
Merge branch '41-add-gorilla-mux-router-to-gitaly' into 'master'
Add gorilla/mux router to gitaly
Closes #41
See merge request !33
26 files changed, 3685 insertions, 2 deletions
diff --git a/cmd/gitaly/main.go b/cmd/gitaly/main.go index d0b8c6168..356669f35 100644 --- a/cmd/gitaly/main.go +++ b/cmd/gitaly/main.go @@ -8,6 +8,8 @@ import ( "github.com/kelseyhightower/envconfig" "github.com/prometheus/client_golang/prometheus/promhttp" + + "gitlab.com/gitlab-org/gitaly/router" ) type Config struct { @@ -38,8 +40,7 @@ func main() { serverError := make(chan error, 2) go func() { - // TODO: Add a handler - serverError <- http.Serve(listener, nil) + serverError <- http.Serve(listener, router.NewRouter()) }() if config.PrometheusListenAddr != "" { diff --git a/handler/home.go b/handler/home.go new file mode 100644 index 000000000..a57a55da5 --- /dev/null +++ b/handler/home.go @@ -0,0 +1,9 @@ +package handler + +import ( + "net/http" +) + +func Home(w http.ResponseWriter, r *http.Request) { + w.Write([]byte("All routes lead to Gitaly\n")) +} diff --git a/handler/home_test.go b/handler/home_test.go new file mode 100644 index 000000000..ba1c0e689 --- /dev/null +++ b/handler/home_test.go @@ -0,0 +1,26 @@ +package handler + +import ( + "net/http" + "net/http/httptest" + "strings" + "testing" +) + +func TestGetHome(t *testing.T) { + recorder := httptest.NewRecorder() + req, err := http.NewRequest("GET", "/", nil) + if err != nil { + t.Fatal("Creating 'GET /' request failed!") + } + + http.HandlerFunc(Home).ServeHTTP(recorder, req) + + if recorder.Code != http.StatusOK { + t.Fatal("Server error: Returned ", recorder.Code, " instead of ", http.StatusOK) + } + + if s := strings.TrimSpace(recorder.Body.String()); s != "All routes lead to Gitaly" { + t.Fatal("Expected GET / to return 'All routes lead to Gitaly', got '", s, "'") + } +} diff --git a/router/router.go b/router/router.go new file mode 100644 index 000000000..0c929cb21 --- /dev/null +++ b/router/router.go @@ -0,0 +1,19 @@ +package router + +import ( + "net/http" + "os" + + "github.com/gorilla/handlers" + "github.com/gorilla/mux" + + "gitlab.com/gitlab-org/gitaly/handler" +) + +func NewRouter() http.Handler { + r := mux.NewRouter() + + r.HandleFunc("/", handler.Home) + + return handlers.LoggingHandler(os.Stdout, r) +} diff --git a/vendor/github.com/gorilla/context/LICENSE b/vendor/github.com/gorilla/context/LICENSE new file mode 100644 index 000000000..0e5fb8728 --- /dev/null +++ b/vendor/github.com/gorilla/context/LICENSE @@ -0,0 +1,27 @@ +Copyright (c) 2012 Rodrigo Moraes. All rights reserved. + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are +met: + + * Redistributions of source code must retain the above copyright +notice, this list of conditions and the following disclaimer. + * Redistributions in binary form must reproduce the above +copyright notice, this list of conditions and the following disclaimer +in the documentation and/or other materials provided with the +distribution. + * Neither the name of Google Inc. nor the names of its +contributors may be used to endorse or promote products derived from +this software without specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. diff --git a/vendor/github.com/gorilla/context/README.md b/vendor/github.com/gorilla/context/README.md new file mode 100644 index 000000000..08f86693b --- /dev/null +++ b/vendor/github.com/gorilla/context/README.md @@ -0,0 +1,10 @@ +context +======= +[![Build Status](https://travis-ci.org/gorilla/context.png?branch=master)](https://travis-ci.org/gorilla/context) + +gorilla/context is a general purpose registry for global request variables. + +> Note: gorilla/context, having been born well before `context.Context` existed, does not play well +> with the shallow copying of the request that [`http.Request.WithContext`](https://golang.org/pkg/net/http/#Request.WithContext) (added to net/http Go 1.7 onwards) performs. You should either use *just* gorilla/context, or moving forward, the new `http.Request.Context()`. + +Read the full documentation here: http://www.gorillatoolkit.org/pkg/context diff --git a/vendor/github.com/gorilla/context/context.go b/vendor/github.com/gorilla/context/context.go new file mode 100644 index 000000000..81cb128b1 --- /dev/null +++ b/vendor/github.com/gorilla/context/context.go @@ -0,0 +1,143 @@ +// Copyright 2012 The Gorilla Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package context + +import ( + "net/http" + "sync" + "time" +) + +var ( + mutex sync.RWMutex + data = make(map[*http.Request]map[interface{}]interface{}) + datat = make(map[*http.Request]int64) +) + +// Set stores a value for a given key in a given request. +func Set(r *http.Request, key, val interface{}) { + mutex.Lock() + if data[r] == nil { + data[r] = make(map[interface{}]interface{}) + datat[r] = time.Now().Unix() + } + data[r][key] = val + mutex.Unlock() +} + +// Get returns a value stored for a given key in a given request. +func Get(r *http.Request, key interface{}) interface{} { + mutex.RLock() + if ctx := data[r]; ctx != nil { + value := ctx[key] + mutex.RUnlock() + return value + } + mutex.RUnlock() + return nil +} + +// GetOk returns stored value and presence state like multi-value return of map access. +func GetOk(r *http.Request, key interface{}) (interface{}, bool) { + mutex.RLock() + if _, ok := data[r]; ok { + value, ok := data[r][key] + mutex.RUnlock() + return value, ok + } + mutex.RUnlock() + return nil, false +} + +// GetAll returns all stored values for the request as a map. Nil is returned for invalid requests. +func GetAll(r *http.Request) map[interface{}]interface{} { + mutex.RLock() + if context, ok := data[r]; ok { + result := make(map[interface{}]interface{}, len(context)) + for k, v := range context { + result[k] = v + } + mutex.RUnlock() + return result + } + mutex.RUnlock() + return nil +} + +// GetAllOk returns all stored values for the request as a map and a boolean value that indicates if +// the request was registered. +func GetAllOk(r *http.Request) (map[interface{}]interface{}, bool) { + mutex.RLock() + context, ok := data[r] + result := make(map[interface{}]interface{}, len(context)) + for k, v := range context { + result[k] = v + } + mutex.RUnlock() + return result, ok +} + +// Delete removes a value stored for a given key in a given request. +func Delete(r *http.Request, key interface{}) { + mutex.Lock() + if data[r] != nil { + delete(data[r], key) + } + mutex.Unlock() +} + +// Clear removes all values stored for a given request. +// +// This is usually called by a handler wrapper to clean up request +// variables at the end of a request lifetime. See ClearHandler(). +func Clear(r *http.Request) { + mutex.Lock() + clear(r) + mutex.Unlock() +} + +// clear is Clear without the lock. +func clear(r *http.Request) { + delete(data, r) + delete(datat, r) +} + +// Purge removes request data stored for longer than maxAge, in seconds. +// It returns the amount of requests removed. +// +// If maxAge <= 0, all request data is removed. +// +// This is only used for sanity check: in case context cleaning was not +// properly set some request data can be kept forever, consuming an increasing +// amount of memory. In case this is detected, Purge() must be called +// periodically until the problem is fixed. +func Purge(maxAge int) int { + mutex.Lock() + count := 0 + if maxAge <= 0 { + count = len(data) + data = make(map[*http.Request]map[interface{}]interface{}) + datat = make(map[*http.Request]int64) + } else { + min := time.Now().Unix() - int64(maxAge) + for r := range data { + if datat[r] < min { + clear(r) + count++ + } + } + } + mutex.Unlock() + return count +} + +// ClearHandler wraps an http.Handler and clears request values at the end +// of a request lifetime. +func ClearHandler(h http.Handler) http.Handler { + return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { + defer Clear(r) + h.ServeHTTP(w, r) + }) +} diff --git a/vendor/github.com/gorilla/context/doc.go b/vendor/github.com/gorilla/context/doc.go new file mode 100644 index 000000000..448d1bfca --- /dev/null +++ b/vendor/github.com/gorilla/context/doc.go @@ -0,0 +1,88 @@ +// Copyright 2012 The Gorilla Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +/* +Package context stores values shared during a request lifetime. + +Note: gorilla/context, having been born well before `context.Context` existed, +does not play well > with the shallow copying of the request that +[`http.Request.WithContext`](https://golang.org/pkg/net/http/#Request.WithContext) +(added to net/http Go 1.7 onwards) performs. You should either use *just* +gorilla/context, or moving forward, the new `http.Request.Context()`. + +For example, a router can set variables extracted from the URL and later +application handlers can access those values, or it can be used to store +sessions values to be saved at the end of a request. There are several +others common uses. + +The idea was posted by Brad Fitzpatrick to the go-nuts mailing list: + + http://groups.google.com/group/golang-nuts/msg/e2d679d303aa5d53 + +Here's the basic usage: first define the keys that you will need. The key +type is interface{} so a key can be of any type that supports equality. +Here we define a key using a custom int type to avoid name collisions: + + package foo + + import ( + "github.com/gorilla/context" + ) + + type key int + + const MyKey key = 0 + +Then set a variable. Variables are bound to an http.Request object, so you +need a request instance to set a value: + + context.Set(r, MyKey, "bar") + +The application can later access the variable using the same key you provided: + + func MyHandler(w http.ResponseWriter, r *http.Request) { + // val is "bar". + val := context.Get(r, foo.MyKey) + + // returns ("bar", true) + val, ok := context.GetOk(r, foo.MyKey) + // ... + } + +And that's all about the basic usage. We discuss some other ideas below. + +Any type can be stored in the context. To enforce a given type, make the key +private and wrap Get() and Set() to accept and return values of a specific +type: + + type key int + + const mykey key = 0 + + // GetMyKey returns a value for this package from the request values. + func GetMyKey(r *http.Request) SomeType { + if rv := context.Get(r, mykey); rv != nil { + return rv.(SomeType) + } + return nil + } + + // SetMyKey sets a value for this package in the request values. + func SetMyKey(r *http.Request, val SomeType) { + context.Set(r, mykey, val) + } + +Variables must be cleared at the end of a request, to remove all values +that were stored. This can be done in an http.Handler, after a request was +served. Just call Clear() passing the request: + + context.Clear(r) + +...or use ClearHandler(), which conveniently wraps an http.Handler to clear +variables at the end of a request lifetime. + +The Routers from the packages gorilla/mux and gorilla/pat call Clear() +so if you are using either of them you don't need to clear the context manually. +*/ +package context diff --git a/vendor/github.com/gorilla/handlers/LICENSE b/vendor/github.com/gorilla/handlers/LICENSE new file mode 100644 index 000000000..66ea3c8ae --- /dev/null +++ b/vendor/github.com/gorilla/handlers/LICENSE @@ -0,0 +1,22 @@ +Copyright (c) 2013 The Gorilla Handlers Authors. All rights reserved. + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are met: + + Redistributions of source code must retain the above copyright notice, this + list of conditions and the following disclaimer. + + Redistributions in binary form must reproduce the above copyright notice, + this list of conditions and the following disclaimer in the documentation + and/or other materials provided with the distribution. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND +ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED +WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE +DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE +FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR +SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER +CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, +OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. diff --git a/vendor/github.com/gorilla/handlers/README.md b/vendor/github.com/gorilla/handlers/README.md new file mode 100644 index 000000000..a782c4152 --- /dev/null +++ b/vendor/github.com/gorilla/handlers/README.md @@ -0,0 +1,53 @@ +gorilla/handlers +================ +[![GoDoc](https://godoc.org/github.com/gorilla/handlers?status.svg)](https://godoc.org/github.com/gorilla/handlers) [![Build Status](https://travis-ci.org/gorilla/handlers.svg?branch=master)](https://travis-ci.org/gorilla/handlers) + +Package handlers is a collection of handlers (aka "HTTP middleware") for use +with Go's `net/http` package (or any framework supporting `http.Handler`), including: + +* [**LoggingHandler**](https://godoc.org/github.com/gorilla/handlers#LoggingHandler) for logging HTTP requests in the Apache [Common Log + Format](http://httpd.apache.org/docs/2.2/logs.html#common). +* [**CombinedLoggingHandler**](https://godoc.org/github.com/gorilla/handlers#CombinedLoggingHandler) for logging HTTP requests in the Apache [Combined Log + Format](http://httpd.apache.org/docs/2.2/logs.html#combined) commonly used by + both Apache and nginx. +* [**CompressHandler**](https://godoc.org/github.com/gorilla/handlers#CompressHandler) for gzipping responses. +* [**ContentTypeHandler**](https://godoc.org/github.com/gorilla/handlers#ContentTypeHandler) for validating requests against a list of accepted + content types. +* [**MethodHandler**](https://godoc.org/github.com/gorilla/handlers#MethodHandler) for matching HTTP methods against handlers in a + `map[string]http.Handler` +* [**ProxyHeaders**](https://godoc.org/github.com/gorilla/handlers#ProxyHeaders) for populating `r.RemoteAddr` and `r.URL.Scheme` based on the + `X-Forwarded-For`, `X-Real-IP`, `X-Forwarded-Proto` and RFC7239 `Forwarded` + headers when running a Go server behind a HTTP reverse proxy. +* [**CanonicalHost**](https://godoc.org/github.com/gorilla/handlers#CanonicalHost) for re-directing to the preferred host when handling multiple + domains (i.e. multiple CNAME aliases). +* [**RecoveryHandler**](https://godoc.org/github.com/gorilla/handlers#RecoveryHandler) for recovering from unexpected panics. + +Other handlers are documented [on the Gorilla +website](http://www.gorillatoolkit.org/pkg/handlers). + +## Example + +A simple example using `handlers.LoggingHandler` and `handlers.CompressHandler`: + +```go +import ( + "net/http" + "github.com/gorilla/handlers" +) + +func main() { + r := http.NewServeMux() + + // Only log requests to our admin dashboard to stdout + r.Handle("/admin", handlers.LoggingHandler(os.Stdout, http.HandlerFunc(ShowAdminDashboard))) + r.HandleFunc("/", ShowIndex) + + // Wrap our server with our gzip handler to gzip compress all responses. + http.ListenAndServe(":8000", handlers.CompressHandler(r)) +} +``` + +## License + +BSD licensed. See the included LICENSE file for details. + diff --git a/vendor/github.com/gorilla/handlers/canonical.go b/vendor/github.com/gorilla/handlers/canonical.go new file mode 100644 index 000000000..8437fefc1 --- /dev/null +++ b/vendor/github.com/gorilla/handlers/canonical.go @@ -0,0 +1,74 @@ +package handlers + +import ( + "net/http" + "net/url" + "strings" +) + +type canonical struct { + h http.Handler + domain string + code int +} + +// CanonicalHost is HTTP middleware that re-directs requests to the canonical +// domain. It accepts a domain and a status code (e.g. 301 or 302) and +// re-directs clients to this domain. The existing request path is maintained. +// +// Note: If the provided domain is considered invalid by url.Parse or otherwise +// returns an empty scheme or host, clients are not re-directed. +// +// Example: +// +// r := mux.NewRouter() +// canonical := handlers.CanonicalHost("http://www.gorillatoolkit.org", 302) +// r.HandleFunc("/route", YourHandler) +// +// log.Fatal(http.ListenAndServe(":7000", canonical(r))) +// +func CanonicalHost(domain string, code int) func(h http.Handler) http.Handler { + fn := func(h http.Handler) http.Handler { + return canonical{h, domain, code} + } + + return fn +} + +func (c canonical) ServeHTTP(w http.ResponseWriter, r *http.Request) { + dest, err := url.Parse(c.domain) + if err != nil { + // Call the next handler if the provided domain fails to parse. + c.h.ServeHTTP(w, r) + return + } + + if dest.Scheme == "" || dest.Host == "" { + // Call the next handler if the scheme or host are empty. + // Note that url.Parse won't fail on in this case. + c.h.ServeHTTP(w, r) + return + } + + if !strings.EqualFold(cleanHost(r.Host), dest.Host) { + // Re-build the destination URL + dest := dest.Scheme + "://" + dest.Host + r.URL.Path + if r.URL.RawQuery != "" { + dest += "?" + r.URL.RawQuery + } + http.Redirect(w, r, dest, c.code) + return + } + + c.h.ServeHTTP(w, r) +} + +// cleanHost cleans invalid Host headers by stripping anything after '/' or ' '. +// This is backported from Go 1.5 (in response to issue #11206) and attempts to +// mitigate malformed Host headers that do not match the format in RFC7230. +func cleanHost(in string) string { + if i := strings.IndexAny(in, " /"); i != -1 { + return in[:i] + } + return in +} diff --git a/vendor/github.com/gorilla/handlers/compress.go b/vendor/github.com/gorilla/handlers/compress.go new file mode 100644 index 000000000..e8345d792 --- /dev/null +++ b/vendor/github.com/gorilla/handlers/compress.go @@ -0,0 +1,148 @@ +// Copyright 2013 The Gorilla Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package handlers + +import ( + "compress/flate" + "compress/gzip" + "io" + "net/http" + "strings" +) + +type compressResponseWriter struct { + io.Writer + http.ResponseWriter + http.Hijacker + http.Flusher + http.CloseNotifier +} + +func (w *compressResponseWriter) WriteHeader(c int) { + w.ResponseWriter.Header().Del("Content-Length") + w.ResponseWriter.WriteHeader(c) +} + +func (w *compressResponseWriter) Header() http.Header { + return w.ResponseWriter.Header() +} + +func (w *compressResponseWriter) Write(b []byte) (int, error) { + h := w.ResponseWriter.Header() + if h.Get("Content-Type") == "" { + h.Set("Content-Type", http.DetectContentType(b)) + } + h.Del("Content-Length") + + return w.Writer.Write(b) +} + +type flusher interface { + Flush() error +} + +func (w *compressResponseWriter) Flush() { + // Flush compressed data if compressor supports it. + if f, ok := w.Writer.(flusher); ok { + f.Flush() + } + // Flush HTTP response. + if w.Flusher != nil { + w.Flusher.Flush() + } +} + +// CompressHandler gzip compresses HTTP responses for clients that support it +// via the 'Accept-Encoding' header. +// +// Compressing TLS traffic may leak the page contents to an attacker if the +// page contains user input: http://security.stackexchange.com/a/102015/12208 +func CompressHandler(h http.Handler) http.Handler { + return CompressHandlerLevel(h, gzip.DefaultCompression) +} + +// CompressHandlerLevel gzip compresses HTTP responses with specified compression level +// for clients that support it via the 'Accept-Encoding' header. +// +// The compression level should be gzip.DefaultCompression, gzip.NoCompression, +// or any integer value between gzip.BestSpeed and gzip.BestCompression inclusive. +// gzip.DefaultCompression is used in case of invalid compression level. +func CompressHandlerLevel(h http.Handler, level int) http.Handler { + if level < gzip.DefaultCompression || level > gzip.BestCompression { + level = gzip.DefaultCompression + } + + return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { + L: + for _, enc := range strings.Split(r.Header.Get("Accept-Encoding"), ",") { + switch strings.TrimSpace(enc) { + case "gzip": + w.Header().Set("Content-Encoding", "gzip") + w.Header().Add("Vary", "Accept-Encoding") + + gw, _ := gzip.NewWriterLevel(w, level) + defer gw.Close() + + h, hok := w.(http.Hijacker) + if !hok { /* w is not Hijacker... oh well... */ + h = nil + } + + f, fok := w.(http.Flusher) + if !fok { + f = nil + } + + cn, cnok := w.(http.CloseNotifier) + if !cnok { + cn = nil + } + + w = &compressResponseWriter{ + Writer: gw, + ResponseWriter: w, + Hijacker: h, + Flusher: f, + CloseNotifier: cn, + } + + break L + case "deflate": + w.Header().Set("Content-Encoding", "deflate") + w.Header().Add("Vary", "Accept-Encoding") + + fw, _ := flate.NewWriter(w, level) + defer fw.Close() + + h, hok := w.(http.Hijacker) + if !hok { /* w is not Hijacker... oh well... */ + h = nil + } + + f, fok := w.(http.Flusher) + if !fok { + f = nil + } + + cn, cnok := w.(http.CloseNotifier) + if !cnok { + cn = nil + } + + w = &compressResponseWriter{ + Writer: fw, + ResponseWriter: w, + Hijacker: h, + Flusher: f, + CloseNotifier: cn, + } + + break L + } + } + + h.ServeHTTP(w, r) + }) +} diff --git a/vendor/github.com/gorilla/handlers/cors.go b/vendor/github.com/gorilla/handlers/cors.go new file mode 100644 index 000000000..1f92d1ad4 --- /dev/null +++ b/vendor/github.com/gorilla/handlers/cors.go @@ -0,0 +1,317 @@ +package handlers + +import ( + "net/http" + "strconv" + "strings" +) + +// CORSOption represents a functional option for configuring the CORS middleware. +type CORSOption func(*cors) error + +type cors struct { + h http.Handler + allowedHeaders []string + allowedMethods []string + allowedOrigins []string + allowedOriginValidator OriginValidator + exposedHeaders []string + maxAge int + ignoreOptions bool + allowCredentials bool +} + +// OriginValidator takes an origin string and returns whether or not that origin is allowed. +type OriginValidator func(string) bool + +var ( + defaultCorsMethods = []string{"GET", "HEAD", "POST"} + defaultCorsHeaders = []string{"Accept", "Accept-Language", "Content-Language", "Origin"} + // (WebKit/Safari v9 sends the Origin header by default in AJAX requests) +) + +const ( + corsOptionMethod string = "OPTIONS" + corsAllowOriginHeader string = "Access-Control-Allow-Origin" + corsExposeHeadersHeader string = "Access-Control-Expose-Headers" + corsMaxAgeHeader string = "Access-Control-Max-Age" + corsAllowMethodsHeader string = "Access-Control-Allow-Methods" + corsAllowHeadersHeader string = "Access-Control-Allow-Headers" + corsAllowCredentialsHeader string = "Access-Control-Allow-Credentials" + corsRequestMethodHeader string = "Access-Control-Request-Method" + corsRequestHeadersHeader string = "Access-Control-Request-Headers" + corsOriginHeader string = "Origin" + corsVaryHeader string = "Vary" + corsOriginMatchAll string = "*" +) + +func (ch *cors) ServeHTTP(w http.ResponseWriter, r *http.Request) { + origin := r.Header.Get(corsOriginHeader) + if !ch.isOriginAllowed(origin) { + ch.h.ServeHTTP(w, r) + return + } + + if r.Method == corsOptionMethod { + if ch.ignoreOptions { + ch.h.ServeHTTP(w, r) + return + } + + if _, ok := r.Header[corsRequestMethodHeader]; !ok { + w.WriteHeader(http.StatusBadRequest) + return + } + + method := r.Header.Get(corsRequestMethodHeader) + if !ch.isMatch(method, ch.allowedMethods) { + w.WriteHeader(http.StatusMethodNotAllowed) + return + } + + requestHeaders := strings.Split(r.Header.Get(corsRequestHeadersHeader), ",") + allowedHeaders := []string{} + for _, v := range requestHeaders { + canonicalHeader := http.CanonicalHeaderKey(strings.TrimSpace(v)) + if canonicalHeader == "" || ch.isMatch(canonicalHeader, defaultCorsHeaders) { + continue + } + + if !ch.isMatch(canonicalHeader, ch.allowedHeaders) { + w.WriteHeader(http.StatusForbidden) + return + } + + allowedHeaders = append(allowedHeaders, canonicalHeader) + } + + if len(allowedHeaders) > 0 { + w.Header().Set(corsAllowHeadersHeader, strings.Join(allowedHeaders, ",")) + } + + if ch.maxAge > 0 { + w.Header().Set(corsMaxAgeHeader, strconv.Itoa(ch.maxAge)) + } + + if !ch.isMatch(method, defaultCorsMethods) { + w.Header().Set(corsAllowMethodsHeader, method) + } + } else { + if len(ch.exposedHeaders) > 0 { + w.Header().Set(corsExposeHeadersHeader, strings.Join(ch.exposedHeaders, ",")) + } + } + + if ch.allowCredentials { + w.Header().Set(corsAllowCredentialsHeader, "true") + } + + if len(ch.allowedOrigins) > 1 { + w.Header().Set(corsVaryHeader, corsOriginHeader) + } + + w.Header().Set(corsAllowOriginHeader, origin) + + if r.Method == corsOptionMethod { + return + } + ch.h.ServeHTTP(w, r) +} + +// CORS provides Cross-Origin Resource Sharing middleware. +// Example: +// +// import ( +// "net/http" +// +// "github.com/gorilla/handlers" +// "github.com/gorilla/mux" +// ) +// +// func main() { +// r := mux.NewRouter() +// r.HandleFunc("/users", UserEndpoint) +// r.HandleFunc("/projects", ProjectEndpoint) +// +// // Apply the CORS middleware to our top-level router, with the defaults. +// http.ListenAndServe(":8000", handlers.CORS()(r)) +// } +// +func CORS(opts ...CORSOption) func(http.Handler) http.Handler { + return func(h http.Handler) http.Handler { + ch := parseCORSOptions(opts...) + ch.h = h + return ch + } +} + +func parseCORSOptions(opts ...CORSOption) *cors { + ch := &cors{ + allowedMethods: defaultCorsMethods, + allowedHeaders: defaultCorsHeaders, + allowedOrigins: []string{corsOriginMatchAll}, + } + + for _, option := range opts { + option(ch) + } + + return ch +} + +// +// Functional options for configuring CORS. +// + +// AllowedHeaders adds the provided headers to the list of allowed headers in a +// CORS request. +// This is an append operation so the headers Accept, Accept-Language, +// and Content-Language are always allowed. +// Content-Type must be explicitly declared if accepting Content-Types other than +// application/x-www-form-urlencoded, multipart/form-data, or text/plain. +func AllowedHeaders(headers []string) CORSOption { + return func(ch *cors) error { + for _, v := range headers { + normalizedHeader := http.CanonicalHeaderKey(strings.TrimSpace(v)) + if normalizedHeader == "" { + continue + } + + if !ch.isMatch(normalizedHeader, ch.allowedHeaders) { + ch.allowedHeaders = append(ch.allowedHeaders, normalizedHeader) + } + } + + return nil + } +} + +// AllowedMethods can be used to explicitly allow methods in the +// Access-Control-Allow-Methods header. +// This is a replacement operation so you must also +// pass GET, HEAD, and POST if you wish to support those methods. +func AllowedMethods(methods []string) CORSOption { + return func(ch *cors) error { + ch.allowedMethods = []string{} + for _, v := range methods { + normalizedMethod := strings.ToUpper(strings.TrimSpace(v)) + if normalizedMethod == "" { + continue + } + + if !ch.isMatch(normalizedMethod, ch.allowedMethods) { + ch.allowedMethods = append(ch.allowedMethods, normalizedMethod) + } + } + + return nil + } +} + +// AllowedOrigins sets the allowed origins for CORS requests, as used in the +// 'Allow-Access-Control-Origin' HTTP header. +// Note: Passing in a []string{"*"} will allow any domain. +func AllowedOrigins(origins []string) CORSOption { + return func(ch *cors) error { + for _, v := range origins { + if v == corsOriginMatchAll { + ch.allowedOrigins = []string{corsOriginMatchAll} + return nil + } + } + + ch.allowedOrigins = origins + return nil + } +} + +// AllowedOriginValidator sets a function for evaluating allowed origins in CORS requests, represented by the +// 'Allow-Access-Control-Origin' HTTP header. +func AllowedOriginValidator(fn OriginValidator) CORSOption { + return func(ch *cors) error { + ch.allowedOriginValidator = fn + return nil + } +} + +// ExposeHeaders can be used to specify headers that are available +// and will not be stripped out by the user-agent. +func ExposedHeaders(headers []string) CORSOption { + return func(ch *cors) error { + ch.exposedHeaders = []string{} + for _, v := range headers { + normalizedHeader := http.CanonicalHeaderKey(strings.TrimSpace(v)) + if normalizedHeader == "" { + continue + } + + if !ch.isMatch(normalizedHeader, ch.exposedHeaders) { + ch.exposedHeaders = append(ch.exposedHeaders, normalizedHeader) + } + } + + return nil + } +} + +// MaxAge determines the maximum age (in seconds) between preflight requests. A +// maximum of 10 minutes is allowed. An age above this value will default to 10 +// minutes. +func MaxAge(age int) CORSOption { + return func(ch *cors) error { + // Maximum of 10 minutes. + if age > 600 { + age = 600 + } + + ch.maxAge = age + return nil + } +} + +// IgnoreOptions causes the CORS middleware to ignore OPTIONS requests, instead +// passing them through to the next handler. This is useful when your application +// or framework has a pre-existing mechanism for responding to OPTIONS requests. +func IgnoreOptions() CORSOption { + return func(ch *cors) error { + ch.ignoreOptions = true + return nil + } +} + +// AllowCredentials can be used to specify that the user agent may pass +// authentication details along with the request. +func AllowCredentials() CORSOption { + return func(ch *cors) error { + ch.allowCredentials = true + return nil + } +} + +func (ch *cors) isOriginAllowed(origin string) bool { + if origin == "" { + return false + } + + if ch.allowedOriginValidator != nil { + return ch.allowedOriginValidator(origin) + } + + for _, allowedOrigin := range ch.allowedOrigins { + if allowedOrigin == origin || allowedOrigin == corsOriginMatchAll { + return true + } + } + + return false +} + +func (ch *cors) isMatch(needle string, haystack []string) bool { + for _, v := range haystack { + if v == needle { + return true + } + } + + return false +} diff --git a/vendor/github.com/gorilla/handlers/doc.go b/vendor/github.com/gorilla/handlers/doc.go new file mode 100644 index 000000000..944e5a8ae --- /dev/null +++ b/vendor/github.com/gorilla/handlers/doc.go @@ -0,0 +1,9 @@ +/* +Package handlers is a collection of handlers (aka "HTTP middleware") for use +with Go's net/http package (or any framework supporting http.Handler). + +The package includes handlers for logging in standardised formats, compressing +HTTP responses, validating content types and other useful tools for manipulating +requests and responses. +*/ +package handlers diff --git a/vendor/github.com/gorilla/handlers/handlers.go b/vendor/github.com/gorilla/handlers/handlers.go new file mode 100644 index 000000000..9544d2f0a --- /dev/null +++ b/vendor/github.com/gorilla/handlers/handlers.go @@ -0,0 +1,403 @@ +// Copyright 2013 The Gorilla Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package handlers + +import ( + "bufio" + "fmt" + "io" + "net" + "net/http" + "net/url" + "sort" + "strconv" + "strings" + "time" + "unicode/utf8" +) + +// MethodHandler is an http.Handler that dispatches to a handler whose key in the +// MethodHandler's map matches the name of the HTTP request's method, eg: GET +// +// If the request's method is OPTIONS and OPTIONS is not a key in the map then +// the handler responds with a status of 200 and sets the Allow header to a +// comma-separated list of available methods. +// +// If the request's method doesn't match any of its keys the handler responds +// with a status of HTTP 405 "Method Not Allowed" and sets the Allow header to a +// comma-separated list of available methods. +type MethodHandler map[string]http.Handler + +func (h MethodHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) { + if handler, ok := h[req.Method]; ok { + handler.ServeHTTP(w, req) + } else { + allow := []string{} + for k := range h { + allow = append(allow, k) + } + sort.Strings(allow) + w.Header().Set("Allow", strings.Join(allow, ", ")) + if req.Method == "OPTIONS" { + w.WriteHeader(http.StatusOK) + } else { + http.Error(w, "Method not allowed", http.StatusMethodNotAllowed) + } + } +} + +// loggingHandler is the http.Handler implementation for LoggingHandlerTo and its +// friends +type loggingHandler struct { + writer io.Writer + handler http.Handler +} + +// combinedLoggingHandler is the http.Handler implementation for LoggingHandlerTo +// and its friends +type combinedLoggingHandler struct { + writer io.Writer + handler http.Handler +} + +func (h loggingHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) { + t := time.Now() + logger := makeLogger(w) + url := *req.URL + h.handler.ServeHTTP(logger, req) + writeLog(h.writer, req, url, t, logger.Status(), logger.Size()) +} + +func (h combinedLoggingHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) { + t := time.Now() + logger := makeLogger(w) + url := *req.URL + h.handler.ServeHTTP(logger, req) + writeCombinedLog(h.writer, req, url, t, logger.Status(), logger.Size()) +} + +func makeLogger(w http.ResponseWriter) loggingResponseWriter { + var logger loggingResponseWriter = &responseLogger{w: w} + if _, ok := w.(http.Hijacker); ok { + logger = &hijackLogger{responseLogger{w: w}} + } + h, ok1 := logger.(http.Hijacker) + c, ok2 := w.(http.CloseNotifier) + if ok1 && ok2 { + return hijackCloseNotifier{logger, h, c} + } + if ok2 { + return &closeNotifyWriter{logger, c} + } + return logger +} + +type loggingResponseWriter interface { + http.ResponseWriter + http.Flusher + Status() int + Size() int +} + +// responseLogger is wrapper of http.ResponseWriter that keeps track of its HTTP +// status code and body size +type responseLogger struct { + w http.ResponseWriter + status int + size int +} + +func (l *responseLogger) Header() http.Header { + return l.w.Header() +} + +func (l *responseLogger) Write(b []byte) (int, error) { + if l.status == 0 { + // The status will be StatusOK if WriteHeader has not been called yet + l.status = http.StatusOK + } + size, err := l.w.Write(b) + l.size += size + return size, err +} + +func (l *responseLogger) WriteHeader(s int) { + l.w.WriteHeader(s) + l.status = s +} + +func (l *responseLogger) Status() int { + return l.status +} + +func (l *responseLogger) Size() int { + return l.size +} + +func (l *responseLogger) Flush() { + f, ok := l.w.(http.Flusher) + if ok { + f.Flush() + } +} + +type hijackLogger struct { + responseLogger +} + +func (l *hijackLogger) Hijack() (net.Conn, *bufio.ReadWriter, error) { + h := l.responseLogger.w.(http.Hijacker) + conn, rw, err := h.Hijack() + if err == nil && l.responseLogger.status == 0 { + // The status will be StatusSwitchingProtocols if there was no error and + // WriteHeader has not been called yet + l.responseLogger.status = http.StatusSwitchingProtocols + } + return conn, rw, err +} + +type closeNotifyWriter struct { + loggingResponseWriter + http.CloseNotifier +} + +type hijackCloseNotifier struct { + loggingResponseWriter + http.Hijacker + http.CloseNotifier +} + +const lowerhex = "0123456789abcdef" + +func appendQuoted(buf []byte, s string) []byte { + var runeTmp [utf8.UTFMax]byte + for width := 0; len(s) > 0; s = s[width:] { + r := rune(s[0]) + width = 1 + if r >= utf8.RuneSelf { + r, width = utf8.DecodeRuneInString(s) + } + if width == 1 && r == utf8.RuneError { + buf = append(buf, `\x`...) + buf = append(buf, lowerhex[s[0]>>4]) + buf = append(buf, lowerhex[s[0]&0xF]) + continue + } + if r == rune('"') || r == '\\' { // always backslashed + buf = append(buf, '\\') + buf = append(buf, byte(r)) + continue + } + if strconv.IsPrint(r) { + n := utf8.EncodeRune(runeTmp[:], r) + buf = append(buf, runeTmp[:n]...) + continue + } + switch r { + case '\a': + buf = append(buf, `\a`...) + case '\b': + buf = append(buf, `\b`...) + case '\f': + buf = append(buf, `\f`...) + case '\n': + buf = append(buf, `\n`...) + case '\r': + buf = append(buf, `\r`...) + case '\t': + buf = append(buf, `\t`...) + case '\v': + buf = append(buf, `\v`...) + default: + switch { + case r < ' ': + buf = append(buf, `\x`...) + buf = append(buf, lowerhex[s[0]>>4]) + buf = append(buf, lowerhex[s[0]&0xF]) + case r > utf8.MaxRune: + r = 0xFFFD + fallthrough + case r < 0x10000: + buf = append(buf, `\u`...) + for s := 12; s >= 0; s -= 4 { + buf = append(buf, lowerhex[r>>uint(s)&0xF]) + } + default: + buf = append(buf, `\U`...) + for s := 28; s >= 0; s -= 4 { + buf = append(buf, lowerhex[r>>uint(s)&0xF]) + } + } + } + } + return buf + +} + +// buildCommonLogLine builds a log entry for req in Apache Common Log Format. +// ts is the timestamp with which the entry should be logged. +// status and size are used to provide the response HTTP status and size. +func buildCommonLogLine(req *http.Request, url url.URL, ts time.Time, status int, size int) []byte { + username := "-" + if url.User != nil { + if name := url.User.Username(); name != "" { + username = name + } + } + + host, _, err := net.SplitHostPort(req.RemoteAddr) + + if err != nil { + host = req.RemoteAddr + } + + uri := req.RequestURI + + // Requests using the CONNECT method over HTTP/2.0 must use + // the authority field (aka r.Host) to identify the target. + // Refer: https://httpwg.github.io/specs/rfc7540.html#CONNECT + if req.ProtoMajor == 2 && req.Method == "CONNECT" { + uri = req.Host + } + if uri == "" { + uri = url.RequestURI() + } + + buf := make([]byte, 0, 3*(len(host)+len(username)+len(req.Method)+len(uri)+len(req.Proto)+50)/2) + buf = append(buf, host...) + buf = append(buf, " - "...) + buf = append(buf, username...) + buf = append(buf, " ["...) + buf = append(buf, ts.Format("02/Jan/2006:15:04:05 -0700")...) + buf = append(buf, `] "`...) + buf = append(buf, req.Method...) + buf = append(buf, " "...) + buf = appendQuoted(buf, uri) + buf = append(buf, " "...) + buf = append(buf, req.Proto...) + buf = append(buf, `" `...) + buf = append(buf, strconv.Itoa(status)...) + buf = append(buf, " "...) + buf = append(buf, strconv.Itoa(size)...) + return buf +} + +// writeLog writes a log entry for req to w in Apache Common Log Format. +// ts is the timestamp with which the entry should be logged. +// status and size are used to provide the response HTTP status and size. +func writeLog(w io.Writer, req *http.Request, url url.URL, ts time.Time, status, size int) { + buf := buildCommonLogLine(req, url, ts, status, size) + buf = append(buf, '\n') + w.Write(buf) +} + +// writeCombinedLog writes a log entry for req to w in Apache Combined Log Format. +// ts is the timestamp with which the entry should be logged. +// status and size are used to provide the response HTTP status and size. +func writeCombinedLog(w io.Writer, req *http.Request, url url.URL, ts time.Time, status, size int) { + buf := buildCommonLogLine(req, url, ts, status, size) + buf = append(buf, ` "`...) + buf = appendQuoted(buf, req.Referer()) + buf = append(buf, `" "`...) + buf = appendQuoted(buf, req.UserAgent()) + buf = append(buf, '"', '\n') + w.Write(buf) +} + +// CombinedLoggingHandler return a http.Handler that wraps h and logs requests to out in +// Apache Combined Log Format. +// +// See http://httpd.apache.org/docs/2.2/logs.html#combined for a description of this format. +// +// LoggingHandler always sets the ident field of the log to - +func CombinedLoggingHandler(out io.Writer, h http.Handler) http.Handler { + return combinedLoggingHandler{out, h} +} + +// LoggingHandler return a http.Handler that wraps h and logs requests to out in +// Apache Common Log Format (CLF). +// +// See http://httpd.apache.org/docs/2.2/logs.html#common for a description of this format. +// +// LoggingHandler always sets the ident field of the log to - +// +// Example: +// +// r := mux.NewRouter() +// r.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) { +// w.Write([]byte("This is a catch-all route")) +// }) +// loggedRouter := handlers.LoggingHandler(os.Stdout, r) +// http.ListenAndServe(":1123", loggedRouter) +// +func LoggingHandler(out io.Writer, h http.Handler) http.Handler { + return loggingHandler{out, h} +} + +// isContentType validates the Content-Type header matches the supplied +// contentType. That is, its type and subtype match. +func isContentType(h http.Header, contentType string) bool { + ct := h.Get("Content-Type") + if i := strings.IndexRune(ct, ';'); i != -1 { + ct = ct[0:i] + } + return ct == contentType +} + +// ContentTypeHandler wraps and returns a http.Handler, validating the request +// content type is compatible with the contentTypes list. It writes a HTTP 415 +// error if that fails. +// +// Only PUT, POST, and PATCH requests are considered. +func ContentTypeHandler(h http.Handler, contentTypes ...string) http.Handler { + return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { + if !(r.Method == "PUT" || r.Method == "POST" || r.Method == "PATCH") { + h.ServeHTTP(w, r) + return + } + + for _, ct := range contentTypes { + if isContentType(r.Header, ct) { + h.ServeHTTP(w, r) + return + } + } + http.Error(w, fmt.Sprintf("Unsupported content type %q; expected one of %q", r.Header.Get("Content-Type"), contentTypes), http.StatusUnsupportedMediaType) + }) +} + +const ( + // HTTPMethodOverrideHeader is a commonly used + // http header to override a request method. + HTTPMethodOverrideHeader = "X-HTTP-Method-Override" + // HTTPMethodOverrideFormKey is a commonly used + // HTML form key to override a request method. + HTTPMethodOverrideFormKey = "_method" +) + +// HTTPMethodOverrideHandler wraps and returns a http.Handler which checks for +// the X-HTTP-Method-Override header or the _method form key, and overrides (if +// valid) request.Method with its value. +// +// This is especially useful for HTTP clients that don't support many http verbs. +// It isn't secure to override e.g a GET to a POST, so only POST requests are +// considered. Likewise, the override method can only be a "write" method: PUT, +// PATCH or DELETE. +// +// Form method takes precedence over header method. +func HTTPMethodOverrideHandler(h http.Handler) http.Handler { + return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { + if r.Method == "POST" { + om := r.FormValue(HTTPMethodOverrideFormKey) + if om == "" { + om = r.Header.Get(HTTPMethodOverrideHeader) + } + if om == "PUT" || om == "PATCH" || om == "DELETE" { + r.Method = om + } + } + h.ServeHTTP(w, r) + }) +} diff --git a/vendor/github.com/gorilla/handlers/proxy_headers.go b/vendor/github.com/gorilla/handlers/proxy_headers.go new file mode 100644 index 000000000..0be750fd7 --- /dev/null +++ b/vendor/github.com/gorilla/handlers/proxy_headers.go @@ -0,0 +1,120 @@ +package handlers + +import ( + "net/http" + "regexp" + "strings" +) + +var ( + // De-facto standard header keys. + xForwardedFor = http.CanonicalHeaderKey("X-Forwarded-For") + xForwardedHost = http.CanonicalHeaderKey("X-Forwarded-Host") + xForwardedProto = http.CanonicalHeaderKey("X-Forwarded-Proto") + xForwardedScheme = http.CanonicalHeaderKey("X-Forwarded-Scheme") + xRealIP = http.CanonicalHeaderKey("X-Real-IP") +) + +var ( + // RFC7239 defines a new "Forwarded: " header designed to replace the + // existing use of X-Forwarded-* headers. + // e.g. Forwarded: for=192.0.2.60;proto=https;by=203.0.113.43 + forwarded = http.CanonicalHeaderKey("Forwarded") + // Allows for a sub-match of the first value after 'for=' to the next + // comma, semi-colon or space. The match is case-insensitive. + forRegex = regexp.MustCompile(`(?i)(?:for=)([^(;|,| )]+)`) + // Allows for a sub-match for the first instance of scheme (http|https) + // prefixed by 'proto='. The match is case-insensitive. + protoRegex = regexp.MustCompile(`(?i)(?:proto=)(https|http)`) +) + +// ProxyHeaders inspects common reverse proxy headers and sets the corresponding +// fields in the HTTP request struct. These are X-Forwarded-For and X-Real-IP +// for the remote (client) IP address, X-Forwarded-Proto or X-Forwarded-Scheme +// for the scheme (http|https) and the RFC7239 Forwarded header, which may +// include both client IPs and schemes. +// +// NOTE: This middleware should only be used when behind a reverse +// proxy like nginx, HAProxy or Apache. Reverse proxies that don't (or are +// configured not to) strip these headers from client requests, or where these +// headers are accepted "as is" from a remote client (e.g. when Go is not behind +// a proxy), can manifest as a vulnerability if your application uses these +// headers for validating the 'trustworthiness' of a request. +func ProxyHeaders(h http.Handler) http.Handler { + fn := func(w http.ResponseWriter, r *http.Request) { + // Set the remote IP with the value passed from the proxy. + if fwd := getIP(r); fwd != "" { + r.RemoteAddr = fwd + } + + // Set the scheme (proto) with the value passed from the proxy. + if scheme := getScheme(r); scheme != "" { + r.URL.Scheme = scheme + } + // Set the host with the value passed by the proxy + if r.Header.Get(xForwardedHost) != "" { + r.Host = r.Header.Get(xForwardedHost) + } + // Call the next handler in the chain. + h.ServeHTTP(w, r) + } + + return http.HandlerFunc(fn) +} + +// getIP retrieves the IP from the X-Forwarded-For, X-Real-IP and RFC7239 +// Forwarded headers (in that order). +func getIP(r *http.Request) string { + var addr string + + if fwd := r.Header.Get(xForwardedFor); fwd != "" { + // Only grab the first (client) address. Note that '192.168.0.1, + // 10.1.1.1' is a valid key for X-Forwarded-For where addresses after + // the first may represent forwarding proxies earlier in the chain. + s := strings.Index(fwd, ", ") + if s == -1 { + s = len(fwd) + } + addr = fwd[:s] + } else if fwd := r.Header.Get(xRealIP); fwd != "" { + // X-Real-IP should only contain one IP address (the client making the + // request). + addr = fwd + } else if fwd := r.Header.Get(forwarded); fwd != "" { + // match should contain at least two elements if the protocol was + // specified in the Forwarded header. The first element will always be + // the 'for=' capture, which we ignore. In the case of multiple IP + // addresses (for=8.8.8.8, 8.8.4.4,172.16.1.20 is valid) we only + // extract the first, which should be the client IP. + if match := forRegex.FindStringSubmatch(fwd); len(match) > 1 { + // IPv6 addresses in Forwarded headers are quoted-strings. We strip + // these quotes. + addr = strings.Trim(match[1], `"`) + } + } + + return addr +} + +// getScheme retrieves the scheme from the X-Forwarded-Proto and RFC7239 +// Forwarded headers (in that order). +func getScheme(r *http.Request) string { + var scheme string + + // Retrieve the scheme from X-Forwarded-Proto. + if proto := r.Header.Get(xForwardedProto); proto != "" { + scheme = strings.ToLower(proto) + } else if proto = r.Header.Get(xForwardedScheme); proto != "" { + scheme = strings.ToLower(proto) + } else if proto = r.Header.Get(forwarded); proto != "" { + // match should contain at least two elements if the protocol was + // specified in the Forwarded header. The first element will always be + // the 'proto=' capture, which we ignore. In the case of multiple proto + // parameters (invalid) we only extract the first. + if match := protoRegex.FindStringSubmatch(proto); len(match) > 1 { + scheme = strings.ToLower(match[1]) + } + } + + return scheme +} diff --git a/vendor/github.com/gorilla/handlers/recovery.go b/vendor/github.com/gorilla/handlers/recovery.go new file mode 100644 index 000000000..b1be9dc83 --- /dev/null +++ b/vendor/github.com/gorilla/handlers/recovery.go @@ -0,0 +1,91 @@ +package handlers + +import ( + "log" + "net/http" + "runtime/debug" +) + +// RecoveryHandlerLogger is an interface used by the recovering handler to print logs. +type RecoveryHandlerLogger interface { + Println(...interface{}) +} + +type recoveryHandler struct { + handler http.Handler + logger RecoveryHandlerLogger + printStack bool +} + +// RecoveryOption provides a functional approach to define +// configuration for a handler; such as setting the logging +// whether or not to print strack traces on panic. +type RecoveryOption func(http.Handler) + +func parseRecoveryOptions(h http.Handler, opts ...RecoveryOption) http.Handler { + for _, option := range opts { + option(h) + } + + return h +} + +// RecoveryHandler is HTTP middleware that recovers from a panic, +// logs the panic, writes http.StatusInternalServerError, and +// continues to the next handler. +// +// Example: +// +// r := mux.NewRouter() +// r.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) { +// panic("Unexpected error!") +// }) +// +// http.ListenAndServe(":1123", handlers.RecoveryHandler()(r)) +func RecoveryHandler(opts ...RecoveryOption) func(h http.Handler) http.Handler { + return func(h http.Handler) http.Handler { + r := &recoveryHandler{handler: h} + return parseRecoveryOptions(r, opts...) + } +} + +// RecoveryLogger is a functional option to override +// the default logger +func RecoveryLogger(logger RecoveryHandlerLogger) RecoveryOption { + return func(h http.Handler) { + r := h.(*recoveryHandler) + r.logger = logger + } +} + +// PrintRecoveryStack is a functional option to enable +// or disable printing stack traces on panic. +func PrintRecoveryStack(print bool) RecoveryOption { + return func(h http.Handler) { + r := h.(*recoveryHandler) + r.printStack = print + } +} + +func (h recoveryHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) { + defer func() { + if err := recover(); err != nil { + w.WriteHeader(http.StatusInternalServerError) + h.log(err) + } + }() + + h.handler.ServeHTTP(w, req) +} + +func (h recoveryHandler) log(v ...interface{}) { + if h.logger != nil { + h.logger.Println(v...) + } else { + log.Println(v...) + } + + if h.printStack { + debug.PrintStack() + } +} diff --git a/vendor/github.com/gorilla/mux/LICENSE b/vendor/github.com/gorilla/mux/LICENSE new file mode 100644 index 000000000..0e5fb8728 --- /dev/null +++ b/vendor/github.com/gorilla/mux/LICENSE @@ -0,0 +1,27 @@ +Copyright (c) 2012 Rodrigo Moraes. All rights reserved. + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are +met: + + * Redistributions of source code must retain the above copyright +notice, this list of conditions and the following disclaimer. + * Redistributions in binary form must reproduce the above +copyright notice, this list of conditions and the following disclaimer +in the documentation and/or other materials provided with the +distribution. + * Neither the name of Google Inc. nor the names of its +contributors may be used to endorse or promote products derived from +this software without specific prior written permission. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. diff --git a/vendor/github.com/gorilla/mux/README.md b/vendor/github.com/gorilla/mux/README.md new file mode 100644 index 000000000..fa79a6bc3 --- /dev/null +++ b/vendor/github.com/gorilla/mux/README.md @@ -0,0 +1,299 @@ +gorilla/mux +=== +[![GoDoc](https://godoc.org/github.com/gorilla/mux?status.svg)](https://godoc.org/github.com/gorilla/mux) +[![Build Status](https://travis-ci.org/gorilla/mux.svg?branch=master)](https://travis-ci.org/gorilla/mux) + +![Gorilla Logo](http://www.gorillatoolkit.org/static/images/gorilla-icon-64.png) + +http://www.gorillatoolkit.org/pkg/mux + +Package `gorilla/mux` implements a request router and dispatcher for matching incoming requests to +their respective handler. + +The name mux stands for "HTTP request multiplexer". Like the standard `http.ServeMux`, `mux.Router` matches incoming requests against a list of registered routes and calls a handler for the route that matches the URL or other conditions. The main features are: + +* It implements the `http.Handler` interface so it is compatible with the standard `http.ServeMux`. +* Requests can be matched based on URL host, path, path prefix, schemes, header and query values, HTTP methods or using custom matchers. +* URL hosts and paths can have variables with an optional regular expression. +* Registered URLs can be built, or "reversed", which helps maintaining references to resources. +* Routes can be used as subrouters: nested routes are only tested if the parent route matches. This is useful to define groups of routes that share common conditions like a host, a path prefix or other repeated attributes. As a bonus, this optimizes request matching. + +--- + +* [Install](#install) +* [Examples](#examples) +* [Matching Routes](#matching-routes) +* [Static Files](#static-files) +* [Registered URLs](#registered-urls) +* [Full Example](#full-example) + +--- + +## Install + +With a [correctly configured](https://golang.org/doc/install#testing) Go toolchain: + +```sh +go get -u github.com/gorilla/mux +``` + +## Examples + +Let's start registering a couple of URL paths and handlers: + +```go +func main() { + r := mux.NewRouter() + r.HandleFunc("/", HomeHandler) + r.HandleFunc("/products", ProductsHandler) + r.HandleFunc("/articles", ArticlesHandler) + http.Handle("/", r) +} +``` + +Here we register three routes mapping URL paths to handlers. This is equivalent to how `http.HandleFunc()` works: if an incoming request URL matches one of the paths, the corresponding handler is called passing (`http.ResponseWriter`, `*http.Request`) as parameters. + +Paths can have variables. They are defined using the format `{name}` or `{name:pattern}`. If a regular expression pattern is not defined, the matched variable will be anything until the next slash. For example: + +```go +r := mux.NewRouter() +r.HandleFunc("/products/{key}", ProductHandler) +r.HandleFunc("/articles/{category}/", ArticlesCategoryHandler) +r.HandleFunc("/articles/{category}/{id:[0-9]+}", ArticleHandler) +``` + +The names are used to create a map of route variables which can be retrieved calling `mux.Vars()`: + +```go +vars := mux.Vars(request) +category := vars["category"] +``` + +And this is all you need to know about the basic usage. More advanced options are explained below. + +### Matching Routes + +Routes can also be restricted to a domain or subdomain. Just define a host pattern to be matched. They can also have variables: + +```go +r := mux.NewRouter() +// Only matches if domain is "www.example.com". +r.Host("www.example.com") +// Matches a dynamic subdomain. +r.Host("{subdomain:[a-z]+}.domain.com") +``` + +There are several other matchers that can be added. To match path prefixes: + +```go +r.PathPrefix("/products/") +``` + +...or HTTP methods: + +```go +r.Methods("GET", "POST") +``` + +...or URL schemes: + +```go +r.Schemes("https") +``` + +...or header values: + +```go +r.Headers("X-Requested-With", "XMLHttpRequest") +``` + +...or query values: + +```go +r.Queries("key", "value") +``` + +...or to use a custom matcher function: + +```go +r.MatcherFunc(func(r *http.Request, rm *RouteMatch) bool { + return r.ProtoMajor == 0 +}) +``` + +...and finally, it is possible to combine several matchers in a single route: + +```go +r.HandleFunc("/products", ProductsHandler). + Host("www.example.com"). + Methods("GET"). + Schemes("http") +``` + +Setting the same matching conditions again and again can be boring, so we have a way to group several routes that share the same requirements. We call it "subrouting". + +For example, let's say we have several URLs that should only match when the host is `www.example.com`. Create a route for that host and get a "subrouter" from it: + +```go +r := mux.NewRouter() +s := r.Host("www.example.com").Subrouter() +``` + +Then register routes in the subrouter: + +```go +s.HandleFunc("/products/", ProductsHandler) +s.HandleFunc("/products/{key}", ProductHandler) +s.HandleFunc("/articles/{category}/{id:[0-9]+}", ArticleHandler) +``` + +The three URL paths we registered above will only be tested if the domain is `www.example.com`, because the subrouter is tested first. This is not only convenient, but also optimizes request matching. You can create subrouters combining any attribute matchers accepted by a route. + +Subrouters can be used to create domain or path "namespaces": you define subrouters in a central place and then parts of the app can register its paths relatively to a given subrouter. + +There's one more thing about subroutes. When a subrouter has a path prefix, the inner routes use it as base for their paths: + +```go +r := mux.NewRouter() +s := r.PathPrefix("/products").Subrouter() +// "/products/" +s.HandleFunc("/", ProductsHandler) +// "/products/{key}/" +s.HandleFunc("/{key}/", ProductHandler) +// "/products/{key}/details" +s.HandleFunc("/{key}/details", ProductDetailsHandler) +``` + +### Static Files + +Note that the path provided to `PathPrefix()` represents a "wildcard": calling +`PathPrefix("/static/").Handler(...)` means that the handler will be passed any +request that matches "/static/*". This makes it easy to serve static files with mux: + +```go +func main() { + var dir string + + flag.StringVar(&dir, "dir", ".", "the directory to serve files from. Defaults to the current dir") + flag.Parse() + r := mux.NewRouter() + + // This will serve files under http://localhost:8000/static/<filename> + r.PathPrefix("/static/").Handler(http.StripPrefix("/static/", http.FileServer(http.Dir(dir)))) + + srv := &http.Server{ + Handler: r, + Addr: "127.0.0.1:8000", + // Good practice: enforce timeouts for servers you create! + WriteTimeout: 15 * time.Second, + ReadTimeout: 15 * time.Second, + } + + log.Fatal(srv.ListenAndServe()) +} +``` + +### Registered URLs + +Now let's see how to build registered URLs. + +Routes can be named. All routes that define a name can have their URLs built, or "reversed". We define a name calling `Name()` on a route. For example: + +```go +r := mux.NewRouter() +r.HandleFunc("/articles/{category}/{id:[0-9]+}", ArticleHandler). + Name("article") +``` + +To build a URL, get the route and call the `URL()` method, passing a sequence of key/value pairs for the route variables. For the previous route, we would do: + +```go +url, err := r.Get("article").URL("category", "technology", "id", "42") +``` + +...and the result will be a `url.URL` with the following path: + +``` +"/articles/technology/42" +``` + +This also works for host variables: + +```go +r := mux.NewRouter() +r.Host("{subdomain}.domain.com"). + Path("/articles/{category}/{id:[0-9]+}"). + HandlerFunc(ArticleHandler). + Name("article") + +// url.String() will be "http://news.domain.com/articles/technology/42" +url, err := r.Get("article").URL("subdomain", "news", + "category", "technology", + "id", "42") +``` + +All variables defined in the route are required, and their values must conform to the corresponding patterns. These requirements guarantee that a generated URL will always match a registered route -- the only exception is for explicitly defined "build-only" routes which never match. + +Regex support also exists for matching Headers within a route. For example, we could do: + +```go +r.HeadersRegexp("Content-Type", "application/(text|json)") +``` + +...and the route will match both requests with a Content-Type of `application/json` as well as `application/text` + +There's also a way to build only the URL host or path for a route: use the methods `URLHost()` or `URLPath()` instead. For the previous route, we would do: + +```go +// "http://news.domain.com/" +host, err := r.Get("article").URLHost("subdomain", "news") + +// "/articles/technology/42" +path, err := r.Get("article").URLPath("category", "technology", "id", "42") +``` + +And if you use subrouters, host and path defined separately can be built as well: + +```go +r := mux.NewRouter() +s := r.Host("{subdomain}.domain.com").Subrouter() +s.Path("/articles/{category}/{id:[0-9]+}"). + HandlerFunc(ArticleHandler). + Name("article") + +// "http://news.domain.com/articles/technology/42" +url, err := r.Get("article").URL("subdomain", "news", + "category", "technology", + "id", "42") +``` + +## Full Example + +Here's a complete, runnable example of a small `mux` based server: + +```go +package main + +import ( + "net/http" + "log" + "github.com/gorilla/mux" +) + +func YourHandler(w http.ResponseWriter, r *http.Request) { + w.Write([]byte("Gorilla!\n")) +} + +func main() { + r := mux.NewRouter() + // Routes consist of a path and a handler function. + r.HandleFunc("/", YourHandler) + + // Bind to a port and pass our router in + log.Fatal(http.ListenAndServe(":8000", r)) +} +``` + +## License + +BSD licensed. See the LICENSE file for details. diff --git a/vendor/github.com/gorilla/mux/context_gorilla.go b/vendor/github.com/gorilla/mux/context_gorilla.go new file mode 100644 index 000000000..d7adaa8fa --- /dev/null +++ b/vendor/github.com/gorilla/mux/context_gorilla.go @@ -0,0 +1,26 @@ +// +build !go1.7 + +package mux + +import ( + "net/http" + + "github.com/gorilla/context" +) + +func contextGet(r *http.Request, key interface{}) interface{} { + return context.Get(r, key) +} + +func contextSet(r *http.Request, key, val interface{}) *http.Request { + if val == nil { + return r + } + + context.Set(r, key, val) + return r +} + +func contextClear(r *http.Request) { + context.Clear(r) +} diff --git a/vendor/github.com/gorilla/mux/context_native.go b/vendor/github.com/gorilla/mux/context_native.go new file mode 100644 index 000000000..209cbea7d --- /dev/null +++ b/vendor/github.com/gorilla/mux/context_native.go @@ -0,0 +1,24 @@ +// +build go1.7 + +package mux + +import ( + "context" + "net/http" +) + +func contextGet(r *http.Request, key interface{}) interface{} { + return r.Context().Value(key) +} + +func contextSet(r *http.Request, key, val interface{}) *http.Request { + if val == nil { + return r + } + + return r.WithContext(context.WithValue(r.Context(), key, val)) +} + +func contextClear(r *http.Request) { + return +} diff --git a/vendor/github.com/gorilla/mux/doc.go b/vendor/github.com/gorilla/mux/doc.go new file mode 100644 index 000000000..e9573dd8a --- /dev/null +++ b/vendor/github.com/gorilla/mux/doc.go @@ -0,0 +1,235 @@ +// Copyright 2012 The Gorilla Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +/* +Package mux implements a request router and dispatcher. + +The name mux stands for "HTTP request multiplexer". Like the standard +http.ServeMux, mux.Router matches incoming requests against a list of +registered routes and calls a handler for the route that matches the URL +or other conditions. The main features are: + + * Requests can be matched based on URL host, path, path prefix, schemes, + header and query values, HTTP methods or using custom matchers. + * URL hosts and paths can have variables with an optional regular + expression. + * Registered URLs can be built, or "reversed", which helps maintaining + references to resources. + * Routes can be used as subrouters: nested routes are only tested if the + parent route matches. This is useful to define groups of routes that + share common conditions like a host, a path prefix or other repeated + attributes. As a bonus, this optimizes request matching. + * It implements the http.Handler interface so it is compatible with the + standard http.ServeMux. + +Let's start registering a couple of URL paths and handlers: + + func main() { + r := mux.NewRouter() + r.HandleFunc("/", HomeHandler) + r.HandleFunc("/products", ProductsHandler) + r.HandleFunc("/articles", ArticlesHandler) + http.Handle("/", r) + } + +Here we register three routes mapping URL paths to handlers. This is +equivalent to how http.HandleFunc() works: if an incoming request URL matches +one of the paths, the corresponding handler is called passing +(http.ResponseWriter, *http.Request) as parameters. + +Paths can have variables. They are defined using the format {name} or +{name:pattern}. If a regular expression pattern is not defined, the matched +variable will be anything until the next slash. For example: + + r := mux.NewRouter() + r.HandleFunc("/products/{key}", ProductHandler) + r.HandleFunc("/articles/{category}/", ArticlesCategoryHandler) + r.HandleFunc("/articles/{category}/{id:[0-9]+}", ArticleHandler) + +Groups can be used inside patterns, as long as they are non-capturing (?:re). For example: + + r.HandleFunc("/articles/{category}/{sort:(?:asc|desc|new)}", ArticlesCategoryHandler) + +The names are used to create a map of route variables which can be retrieved +calling mux.Vars(): + + vars := mux.Vars(request) + category := vars["category"] + +And this is all you need to know about the basic usage. More advanced options +are explained below. + +Routes can also be restricted to a domain or subdomain. Just define a host +pattern to be matched. They can also have variables: + + r := mux.NewRouter() + // Only matches if domain is "www.example.com". + r.Host("www.example.com") + // Matches a dynamic subdomain. + r.Host("{subdomain:[a-z]+}.domain.com") + +There are several other matchers that can be added. To match path prefixes: + + r.PathPrefix("/products/") + +...or HTTP methods: + + r.Methods("GET", "POST") + +...or URL schemes: + + r.Schemes("https") + +...or header values: + + r.Headers("X-Requested-With", "XMLHttpRequest") + +...or query values: + + r.Queries("key", "value") + +...or to use a custom matcher function: + + r.MatcherFunc(func(r *http.Request, rm *RouteMatch) bool { + return r.ProtoMajor == 0 + }) + +...and finally, it is possible to combine several matchers in a single route: + + r.HandleFunc("/products", ProductsHandler). + Host("www.example.com"). + Methods("GET"). + Schemes("http") + +Setting the same matching conditions again and again can be boring, so we have +a way to group several routes that share the same requirements. +We call it "subrouting". + +For example, let's say we have several URLs that should only match when the +host is "www.example.com". Create a route for that host and get a "subrouter" +from it: + + r := mux.NewRouter() + s := r.Host("www.example.com").Subrouter() + +Then register routes in the subrouter: + + s.HandleFunc("/products/", ProductsHandler) + s.HandleFunc("/products/{key}", ProductHandler) + s.HandleFunc("/articles/{category}/{id:[0-9]+}"), ArticleHandler) + +The three URL paths we registered above will only be tested if the domain is +"www.example.com", because the subrouter is tested first. This is not +only convenient, but also optimizes request matching. You can create +subrouters combining any attribute matchers accepted by a route. + +Subrouters can be used to create domain or path "namespaces": you define +subrouters in a central place and then parts of the app can register its +paths relatively to a given subrouter. + +There's one more thing about subroutes. When a subrouter has a path prefix, +the inner routes use it as base for their paths: + + r := mux.NewRouter() + s := r.PathPrefix("/products").Subrouter() + // "/products/" + s.HandleFunc("/", ProductsHandler) + // "/products/{key}/" + s.HandleFunc("/{key}/", ProductHandler) + // "/products/{key}/details" + s.HandleFunc("/{key}/details", ProductDetailsHandler) + +Note that the path provided to PathPrefix() represents a "wildcard": calling +PathPrefix("/static/").Handler(...) means that the handler will be passed any +request that matches "/static/*". This makes it easy to serve static files with mux: + + func main() { + var dir string + + flag.StringVar(&dir, "dir", ".", "the directory to serve files from. Defaults to the current dir") + flag.Parse() + r := mux.NewRouter() + + // This will serve files under http://localhost:8000/static/<filename> + r.PathPrefix("/static/").Handler(http.StripPrefix("/static/", http.FileServer(http.Dir(dir)))) + + srv := &http.Server{ + Handler: r, + Addr: "127.0.0.1:8000", + // Good practice: enforce timeouts for servers you create! + WriteTimeout: 15 * time.Second, + ReadTimeout: 15 * time.Second, + } + + log.Fatal(srv.ListenAndServe()) + } + +Now let's see how to build registered URLs. + +Routes can be named. All routes that define a name can have their URLs built, +or "reversed". We define a name calling Name() on a route. For example: + + r := mux.NewRouter() + r.HandleFunc("/articles/{category}/{id:[0-9]+}", ArticleHandler). + Name("article") + +To build a URL, get the route and call the URL() method, passing a sequence of +key/value pairs for the route variables. For the previous route, we would do: + + url, err := r.Get("article").URL("category", "technology", "id", "42") + +...and the result will be a url.URL with the following path: + + "/articles/technology/42" + +This also works for host variables: + + r := mux.NewRouter() + r.Host("{subdomain}.domain.com"). + Path("/articles/{category}/{id:[0-9]+}"). + HandlerFunc(ArticleHandler). + Name("article") + + // url.String() will be "http://news.domain.com/articles/technology/42" + url, err := r.Get("article").URL("subdomain", "news", + "category", "technology", + "id", "42") + +All variables defined in the route are required, and their values must +conform to the corresponding patterns. These requirements guarantee that a +generated URL will always match a registered route -- the only exception is +for explicitly defined "build-only" routes which never match. + +Regex support also exists for matching Headers within a route. For example, we could do: + + r.HeadersRegexp("Content-Type", "application/(text|json)") + +...and the route will match both requests with a Content-Type of `application/json` as well as +`application/text` + +There's also a way to build only the URL host or path for a route: +use the methods URLHost() or URLPath() instead. For the previous route, +we would do: + + // "http://news.domain.com/" + host, err := r.Get("article").URLHost("subdomain", "news") + + // "/articles/technology/42" + path, err := r.Get("article").URLPath("category", "technology", "id", "42") + +And if you use subrouters, host and path defined separately can be built +as well: + + r := mux.NewRouter() + s := r.Host("{subdomain}.domain.com").Subrouter() + s.Path("/articles/{category}/{id:[0-9]+}"). + HandlerFunc(ArticleHandler). + Name("article") + + // "http://news.domain.com/articles/technology/42" + url, err := r.Get("article").URL("subdomain", "news", + "category", "technology", + "id", "42") +*/ +package mux diff --git a/vendor/github.com/gorilla/mux/mux.go b/vendor/github.com/gorilla/mux/mux.go new file mode 100644 index 000000000..d66ec3841 --- /dev/null +++ b/vendor/github.com/gorilla/mux/mux.go @@ -0,0 +1,542 @@ +// Copyright 2012 The Gorilla Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package mux + +import ( + "errors" + "fmt" + "net/http" + "path" + "regexp" + "strings" +) + +// NewRouter returns a new router instance. +func NewRouter() *Router { + return &Router{namedRoutes: make(map[string]*Route), KeepContext: false} +} + +// Router registers routes to be matched and dispatches a handler. +// +// It implements the http.Handler interface, so it can be registered to serve +// requests: +// +// var router = mux.NewRouter() +// +// func main() { +// http.Handle("/", router) +// } +// +// Or, for Google App Engine, register it in a init() function: +// +// func init() { +// http.Handle("/", router) +// } +// +// This will send all incoming requests to the router. +type Router struct { + // Configurable Handler to be used when no route matches. + NotFoundHandler http.Handler + // Parent route, if this is a subrouter. + parent parentRoute + // Routes to be matched, in order. + routes []*Route + // Routes by name for URL building. + namedRoutes map[string]*Route + // See Router.StrictSlash(). This defines the flag for new routes. + strictSlash bool + // See Router.SkipClean(). This defines the flag for new routes. + skipClean bool + // If true, do not clear the request context after handling the request. + // This has no effect when go1.7+ is used, since the context is stored + // on the request itself. + KeepContext bool + // see Router.UseEncodedPath(). This defines a flag for all routes. + useEncodedPath bool +} + +// Match matches registered routes against the request. +func (r *Router) Match(req *http.Request, match *RouteMatch) bool { + for _, route := range r.routes { + if route.Match(req, match) { + return true + } + } + + // Closest match for a router (includes sub-routers) + if r.NotFoundHandler != nil { + match.Handler = r.NotFoundHandler + return true + } + return false +} + +// ServeHTTP dispatches the handler registered in the matched route. +// +// When there is a match, the route variables can be retrieved calling +// mux.Vars(request). +func (r *Router) ServeHTTP(w http.ResponseWriter, req *http.Request) { + if !r.skipClean { + path := req.URL.Path + if r.useEncodedPath { + path = getPath(req) + } + // Clean path to canonical form and redirect. + if p := cleanPath(path); p != path { + + // Added 3 lines (Philip Schlump) - It was dropping the query string and #whatever from query. + // This matches with fix in go 1.2 r.c. 4 for same problem. Go Issue: + // http://code.google.com/p/go/issues/detail?id=5252 + url := *req.URL + url.Path = p + p = url.String() + + w.Header().Set("Location", p) + w.WriteHeader(http.StatusMovedPermanently) + return + } + } + var match RouteMatch + var handler http.Handler + if r.Match(req, &match) { + handler = match.Handler + req = setVars(req, match.Vars) + req = setCurrentRoute(req, match.Route) + } + if handler == nil { + handler = http.NotFoundHandler() + } + if !r.KeepContext { + defer contextClear(req) + } + handler.ServeHTTP(w, req) +} + +// Get returns a route registered with the given name. +func (r *Router) Get(name string) *Route { + return r.getNamedRoutes()[name] +} + +// GetRoute returns a route registered with the given name. This method +// was renamed to Get() and remains here for backwards compatibility. +func (r *Router) GetRoute(name string) *Route { + return r.getNamedRoutes()[name] +} + +// StrictSlash defines the trailing slash behavior for new routes. The initial +// value is false. +// +// When true, if the route path is "/path/", accessing "/path" will redirect +// to the former and vice versa. In other words, your application will always +// see the path as specified in the route. +// +// When false, if the route path is "/path", accessing "/path/" will not match +// this route and vice versa. +// +// Special case: when a route sets a path prefix using the PathPrefix() method, +// strict slash is ignored for that route because the redirect behavior can't +// be determined from a prefix alone. However, any subrouters created from that +// route inherit the original StrictSlash setting. +func (r *Router) StrictSlash(value bool) *Router { + r.strictSlash = value + return r +} + +// SkipClean defines the path cleaning behaviour for new routes. The initial +// value is false. Users should be careful about which routes are not cleaned +// +// When true, if the route path is "/path//to", it will remain with the double +// slash. This is helpful if you have a route like: /fetch/http://xkcd.com/534/ +// +// When false, the path will be cleaned, so /fetch/http://xkcd.com/534/ will +// become /fetch/http/xkcd.com/534 +func (r *Router) SkipClean(value bool) *Router { + r.skipClean = value + return r +} + +// UseEncodedPath tells the router to match the encoded original path +// to the routes. +// For eg. "/path/foo%2Fbar/to" will match the path "/path/{var}/to". +// This behavior has the drawback of needing to match routes against +// r.RequestURI instead of r.URL.Path. Any modifications (such as http.StripPrefix) +// to r.URL.Path will not affect routing when this flag is on and thus may +// induce unintended behavior. +// +// If not called, the router will match the unencoded path to the routes. +// For eg. "/path/foo%2Fbar/to" will match the path "/path/foo/bar/to" +func (r *Router) UseEncodedPath() *Router { + r.useEncodedPath = true + return r +} + +// ---------------------------------------------------------------------------- +// parentRoute +// ---------------------------------------------------------------------------- + +// getNamedRoutes returns the map where named routes are registered. +func (r *Router) getNamedRoutes() map[string]*Route { + if r.namedRoutes == nil { + if r.parent != nil { + r.namedRoutes = r.parent.getNamedRoutes() + } else { + r.namedRoutes = make(map[string]*Route) + } + } + return r.namedRoutes +} + +// getRegexpGroup returns regexp definitions from the parent route, if any. +func (r *Router) getRegexpGroup() *routeRegexpGroup { + if r.parent != nil { + return r.parent.getRegexpGroup() + } + return nil +} + +func (r *Router) buildVars(m map[string]string) map[string]string { + if r.parent != nil { + m = r.parent.buildVars(m) + } + return m +} + +// ---------------------------------------------------------------------------- +// Route factories +// ---------------------------------------------------------------------------- + +// NewRoute registers an empty route. +func (r *Router) NewRoute() *Route { + route := &Route{parent: r, strictSlash: r.strictSlash, skipClean: r.skipClean, useEncodedPath: r.useEncodedPath} + r.routes = append(r.routes, route) + return route +} + +// Handle registers a new route with a matcher for the URL path. +// See Route.Path() and Route.Handler(). +func (r *Router) Handle(path string, handler http.Handler) *Route { + return r.NewRoute().Path(path).Handler(handler) +} + +// HandleFunc registers a new route with a matcher for the URL path. +// See Route.Path() and Route.HandlerFunc(). +func (r *Router) HandleFunc(path string, f func(http.ResponseWriter, + *http.Request)) *Route { + return r.NewRoute().Path(path).HandlerFunc(f) +} + +// Headers registers a new route with a matcher for request header values. +// See Route.Headers(). +func (r *Router) Headers(pairs ...string) *Route { + return r.NewRoute().Headers(pairs...) +} + +// Host registers a new route with a matcher for the URL host. +// See Route.Host(). +func (r *Router) Host(tpl string) *Route { + return r.NewRoute().Host(tpl) +} + +// MatcherFunc registers a new route with a custom matcher function. +// See Route.MatcherFunc(). +func (r *Router) MatcherFunc(f MatcherFunc) *Route { + return r.NewRoute().MatcherFunc(f) +} + +// Methods registers a new route with a matcher for HTTP methods. +// See Route.Methods(). +func (r *Router) Methods(methods ...string) *Route { + return r.NewRoute().Methods(methods...) +} + +// Path registers a new route with a matcher for the URL path. +// See Route.Path(). +func (r *Router) Path(tpl string) *Route { + return r.NewRoute().Path(tpl) +} + +// PathPrefix registers a new route with a matcher for the URL path prefix. +// See Route.PathPrefix(). +func (r *Router) PathPrefix(tpl string) *Route { + return r.NewRoute().PathPrefix(tpl) +} + +// Queries registers a new route with a matcher for URL query values. +// See Route.Queries(). +func (r *Router) Queries(pairs ...string) *Route { + return r.NewRoute().Queries(pairs...) +} + +// Schemes registers a new route with a matcher for URL schemes. +// See Route.Schemes(). +func (r *Router) Schemes(schemes ...string) *Route { + return r.NewRoute().Schemes(schemes...) +} + +// BuildVarsFunc registers a new route with a custom function for modifying +// route variables before building a URL. +func (r *Router) BuildVarsFunc(f BuildVarsFunc) *Route { + return r.NewRoute().BuildVarsFunc(f) +} + +// Walk walks the router and all its sub-routers, calling walkFn for each route +// in the tree. The routes are walked in the order they were added. Sub-routers +// are explored depth-first. +func (r *Router) Walk(walkFn WalkFunc) error { + return r.walk(walkFn, []*Route{}) +} + +// SkipRouter is used as a return value from WalkFuncs to indicate that the +// router that walk is about to descend down to should be skipped. +var SkipRouter = errors.New("skip this router") + +// WalkFunc is the type of the function called for each route visited by Walk. +// At every invocation, it is given the current route, and the current router, +// and a list of ancestor routes that lead to the current route. +type WalkFunc func(route *Route, router *Router, ancestors []*Route) error + +func (r *Router) walk(walkFn WalkFunc, ancestors []*Route) error { + for _, t := range r.routes { + if t.regexp == nil || t.regexp.path == nil || t.regexp.path.template == "" { + continue + } + + err := walkFn(t, r, ancestors) + if err == SkipRouter { + continue + } + if err != nil { + return err + } + for _, sr := range t.matchers { + if h, ok := sr.(*Router); ok { + err := h.walk(walkFn, ancestors) + if err != nil { + return err + } + } + } + if h, ok := t.handler.(*Router); ok { + ancestors = append(ancestors, t) + err := h.walk(walkFn, ancestors) + if err != nil { + return err + } + ancestors = ancestors[:len(ancestors)-1] + } + } + return nil +} + +// ---------------------------------------------------------------------------- +// Context +// ---------------------------------------------------------------------------- + +// RouteMatch stores information about a matched route. +type RouteMatch struct { + Route *Route + Handler http.Handler + Vars map[string]string +} + +type contextKey int + +const ( + varsKey contextKey = iota + routeKey +) + +// Vars returns the route variables for the current request, if any. +func Vars(r *http.Request) map[string]string { + if rv := contextGet(r, varsKey); rv != nil { + return rv.(map[string]string) + } + return nil +} + +// CurrentRoute returns the matched route for the current request, if any. +// This only works when called inside the handler of the matched route +// because the matched route is stored in the request context which is cleared +// after the handler returns, unless the KeepContext option is set on the +// Router. +func CurrentRoute(r *http.Request) *Route { + if rv := contextGet(r, routeKey); rv != nil { + return rv.(*Route) + } + return nil +} + +func setVars(r *http.Request, val interface{}) *http.Request { + return contextSet(r, varsKey, val) +} + +func setCurrentRoute(r *http.Request, val interface{}) *http.Request { + return contextSet(r, routeKey, val) +} + +// ---------------------------------------------------------------------------- +// Helpers +// ---------------------------------------------------------------------------- + +// getPath returns the escaped path if possible; doing what URL.EscapedPath() +// which was added in go1.5 does +func getPath(req *http.Request) string { + if req.RequestURI != "" { + // Extract the path from RequestURI (which is escaped unlike URL.Path) + // as detailed here as detailed in https://golang.org/pkg/net/url/#URL + // for < 1.5 server side workaround + // http://localhost/path/here?v=1 -> /path/here + path := req.RequestURI + path = strings.TrimPrefix(path, req.URL.Scheme+`://`) + path = strings.TrimPrefix(path, req.URL.Host) + if i := strings.LastIndex(path, "?"); i > -1 { + path = path[:i] + } + if i := strings.LastIndex(path, "#"); i > -1 { + path = path[:i] + } + return path + } + return req.URL.Path +} + +// cleanPath returns the canonical path for p, eliminating . and .. elements. +// Borrowed from the net/http package. +func cleanPath(p string) string { + if p == "" { + return "/" + } + if p[0] != '/' { + p = "/" + p + } + np := path.Clean(p) + // path.Clean removes trailing slash except for root; + // put the trailing slash back if necessary. + if p[len(p)-1] == '/' && np != "/" { + np += "/" + } + + return np +} + +// uniqueVars returns an error if two slices contain duplicated strings. +func uniqueVars(s1, s2 []string) error { + for _, v1 := range s1 { + for _, v2 := range s2 { + if v1 == v2 { + return fmt.Errorf("mux: duplicated route variable %q", v2) + } + } + } + return nil +} + +// checkPairs returns the count of strings passed in, and an error if +// the count is not an even number. +func checkPairs(pairs ...string) (int, error) { + length := len(pairs) + if length%2 != 0 { + return length, fmt.Errorf( + "mux: number of parameters must be multiple of 2, got %v", pairs) + } + return length, nil +} + +// mapFromPairsToString converts variadic string parameters to a +// string to string map. +func mapFromPairsToString(pairs ...string) (map[string]string, error) { + length, err := checkPairs(pairs...) + if err != nil { + return nil, err + } + m := make(map[string]string, length/2) + for i := 0; i < length; i += 2 { + m[pairs[i]] = pairs[i+1] + } + return m, nil +} + +// mapFromPairsToRegex converts variadic string paramers to a +// string to regex map. +func mapFromPairsToRegex(pairs ...string) (map[string]*regexp.Regexp, error) { + length, err := checkPairs(pairs...) + if err != nil { + return nil, err + } + m := make(map[string]*regexp.Regexp, length/2) + for i := 0; i < length; i += 2 { + regex, err := regexp.Compile(pairs[i+1]) + if err != nil { + return nil, err + } + m[pairs[i]] = regex + } + return m, nil +} + +// matchInArray returns true if the given string value is in the array. +func matchInArray(arr []string, value string) bool { + for _, v := range arr { + if v == value { + return true + } + } + return false +} + +// matchMapWithString returns true if the given key/value pairs exist in a given map. +func matchMapWithString(toCheck map[string]string, toMatch map[string][]string, canonicalKey bool) bool { + for k, v := range toCheck { + // Check if key exists. + if canonicalKey { + k = http.CanonicalHeaderKey(k) + } + if values := toMatch[k]; values == nil { + return false + } else if v != "" { + // If value was defined as an empty string we only check that the + // key exists. Otherwise we also check for equality. + valueExists := false + for _, value := range values { + if v == value { + valueExists = true + break + } + } + if !valueExists { + return false + } + } + } + return true +} + +// matchMapWithRegex returns true if the given key/value pairs exist in a given map compiled against +// the given regex +func matchMapWithRegex(toCheck map[string]*regexp.Regexp, toMatch map[string][]string, canonicalKey bool) bool { + for k, v := range toCheck { + // Check if key exists. + if canonicalKey { + k = http.CanonicalHeaderKey(k) + } + if values := toMatch[k]; values == nil { + return false + } else if v != nil { + // If value was defined as an empty string we only check that the + // key exists. Otherwise we also check for equality. + valueExists := false + for _, value := range values { + if v.MatchString(value) { + valueExists = true + break + } + } + if !valueExists { + return false + } + } + } + return true +} diff --git a/vendor/github.com/gorilla/mux/regexp.go b/vendor/github.com/gorilla/mux/regexp.go new file mode 100644 index 000000000..fd8fe3956 --- /dev/null +++ b/vendor/github.com/gorilla/mux/regexp.go @@ -0,0 +1,316 @@ +// Copyright 2012 The Gorilla Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package mux + +import ( + "bytes" + "fmt" + "net/http" + "net/url" + "regexp" + "strconv" + "strings" +) + +// newRouteRegexp parses a route template and returns a routeRegexp, +// used to match a host, a path or a query string. +// +// It will extract named variables, assemble a regexp to be matched, create +// a "reverse" template to build URLs and compile regexps to validate variable +// values used in URL building. +// +// Previously we accepted only Python-like identifiers for variable +// names ([a-zA-Z_][a-zA-Z0-9_]*), but currently the only restriction is that +// name and pattern can't be empty, and names can't contain a colon. +func newRouteRegexp(tpl string, matchHost, matchPrefix, matchQuery, strictSlash, useEncodedPath bool) (*routeRegexp, error) { + // Check if it is well-formed. + idxs, errBraces := braceIndices(tpl) + if errBraces != nil { + return nil, errBraces + } + // Backup the original. + template := tpl + // Now let's parse it. + defaultPattern := "[^/]+" + if matchQuery { + defaultPattern = "[^?&]*" + } else if matchHost { + defaultPattern = "[^.]+" + matchPrefix = false + } + // Only match strict slash if not matching + if matchPrefix || matchHost || matchQuery { + strictSlash = false + } + // Set a flag for strictSlash. + endSlash := false + if strictSlash && strings.HasSuffix(tpl, "/") { + tpl = tpl[:len(tpl)-1] + endSlash = true + } + varsN := make([]string, len(idxs)/2) + varsR := make([]*regexp.Regexp, len(idxs)/2) + pattern := bytes.NewBufferString("") + pattern.WriteByte('^') + reverse := bytes.NewBufferString("") + var end int + var err error + for i := 0; i < len(idxs); i += 2 { + // Set all values we are interested in. + raw := tpl[end:idxs[i]] + end = idxs[i+1] + parts := strings.SplitN(tpl[idxs[i]+1:end-1], ":", 2) + name := parts[0] + patt := defaultPattern + if len(parts) == 2 { + patt = parts[1] + } + // Name or pattern can't be empty. + if name == "" || patt == "" { + return nil, fmt.Errorf("mux: missing name or pattern in %q", + tpl[idxs[i]:end]) + } + // Build the regexp pattern. + fmt.Fprintf(pattern, "%s(?P<%s>%s)", regexp.QuoteMeta(raw), varGroupName(i/2), patt) + + // Build the reverse template. + fmt.Fprintf(reverse, "%s%%s", raw) + + // Append variable name and compiled pattern. + varsN[i/2] = name + varsR[i/2], err = regexp.Compile(fmt.Sprintf("^%s$", patt)) + if err != nil { + return nil, err + } + } + // Add the remaining. + raw := tpl[end:] + pattern.WriteString(regexp.QuoteMeta(raw)) + if strictSlash { + pattern.WriteString("[/]?") + } + if matchQuery { + // Add the default pattern if the query value is empty + if queryVal := strings.SplitN(template, "=", 2)[1]; queryVal == "" { + pattern.WriteString(defaultPattern) + } + } + if !matchPrefix { + pattern.WriteByte('$') + } + reverse.WriteString(raw) + if endSlash { + reverse.WriteByte('/') + } + // Compile full regexp. + reg, errCompile := regexp.Compile(pattern.String()) + if errCompile != nil { + return nil, errCompile + } + // Done! + return &routeRegexp{ + template: template, + matchHost: matchHost, + matchQuery: matchQuery, + strictSlash: strictSlash, + useEncodedPath: useEncodedPath, + regexp: reg, + reverse: reverse.String(), + varsN: varsN, + varsR: varsR, + }, nil +} + +// routeRegexp stores a regexp to match a host or path and information to +// collect and validate route variables. +type routeRegexp struct { + // The unmodified template. + template string + // True for host match, false for path or query string match. + matchHost bool + // True for query string match, false for path and host match. + matchQuery bool + // The strictSlash value defined on the route, but disabled if PathPrefix was used. + strictSlash bool + // Determines whether to use encoded path from getPath function or unencoded + // req.URL.Path for path matching + useEncodedPath bool + // Expanded regexp. + regexp *regexp.Regexp + // Reverse template. + reverse string + // Variable names. + varsN []string + // Variable regexps (validators). + varsR []*regexp.Regexp +} + +// Match matches the regexp against the URL host or path. +func (r *routeRegexp) Match(req *http.Request, match *RouteMatch) bool { + if !r.matchHost { + if r.matchQuery { + return r.matchQueryString(req) + } + path := req.URL.Path + if r.useEncodedPath { + path = getPath(req) + } + return r.regexp.MatchString(path) + } + + return r.regexp.MatchString(getHost(req)) +} + +// url builds a URL part using the given values. +func (r *routeRegexp) url(values map[string]string) (string, error) { + urlValues := make([]interface{}, len(r.varsN)) + for k, v := range r.varsN { + value, ok := values[v] + if !ok { + return "", fmt.Errorf("mux: missing route variable %q", v) + } + urlValues[k] = value + } + rv := fmt.Sprintf(r.reverse, urlValues...) + if !r.regexp.MatchString(rv) { + // The URL is checked against the full regexp, instead of checking + // individual variables. This is faster but to provide a good error + // message, we check individual regexps if the URL doesn't match. + for k, v := range r.varsN { + if !r.varsR[k].MatchString(values[v]) { + return "", fmt.Errorf( + "mux: variable %q doesn't match, expected %q", values[v], + r.varsR[k].String()) + } + } + } + return rv, nil +} + +// getURLQuery returns a single query parameter from a request URL. +// For a URL with foo=bar&baz=ding, we return only the relevant key +// value pair for the routeRegexp. +func (r *routeRegexp) getURLQuery(req *http.Request) string { + if !r.matchQuery { + return "" + } + templateKey := strings.SplitN(r.template, "=", 2)[0] + for key, vals := range req.URL.Query() { + if key == templateKey && len(vals) > 0 { + return key + "=" + vals[0] + } + } + return "" +} + +func (r *routeRegexp) matchQueryString(req *http.Request) bool { + return r.regexp.MatchString(r.getURLQuery(req)) +} + +// braceIndices returns the first level curly brace indices from a string. +// It returns an error in case of unbalanced braces. +func braceIndices(s string) ([]int, error) { + var level, idx int + var idxs []int + for i := 0; i < len(s); i++ { + switch s[i] { + case '{': + if level++; level == 1 { + idx = i + } + case '}': + if level--; level == 0 { + idxs = append(idxs, idx, i+1) + } else if level < 0 { + return nil, fmt.Errorf("mux: unbalanced braces in %q", s) + } + } + } + if level != 0 { + return nil, fmt.Errorf("mux: unbalanced braces in %q", s) + } + return idxs, nil +} + +// varGroupName builds a capturing group name for the indexed variable. +func varGroupName(idx int) string { + return "v" + strconv.Itoa(idx) +} + +// ---------------------------------------------------------------------------- +// routeRegexpGroup +// ---------------------------------------------------------------------------- + +// routeRegexpGroup groups the route matchers that carry variables. +type routeRegexpGroup struct { + host *routeRegexp + path *routeRegexp + queries []*routeRegexp +} + +// setMatch extracts the variables from the URL once a route matches. +func (v *routeRegexpGroup) setMatch(req *http.Request, m *RouteMatch, r *Route) { + // Store host variables. + if v.host != nil { + host := getHost(req) + matches := v.host.regexp.FindStringSubmatchIndex(host) + if len(matches) > 0 { + extractVars(host, matches, v.host.varsN, m.Vars) + } + } + path := req.URL.Path + if r.useEncodedPath { + path = getPath(req) + } + // Store path variables. + if v.path != nil { + matches := v.path.regexp.FindStringSubmatchIndex(path) + if len(matches) > 0 { + extractVars(path, matches, v.path.varsN, m.Vars) + // Check if we should redirect. + if v.path.strictSlash { + p1 := strings.HasSuffix(path, "/") + p2 := strings.HasSuffix(v.path.template, "/") + if p1 != p2 { + u, _ := url.Parse(req.URL.String()) + if p1 { + u.Path = u.Path[:len(u.Path)-1] + } else { + u.Path += "/" + } + m.Handler = http.RedirectHandler(u.String(), 301) + } + } + } + } + // Store query string variables. + for _, q := range v.queries { + queryURL := q.getURLQuery(req) + matches := q.regexp.FindStringSubmatchIndex(queryURL) + if len(matches) > 0 { + extractVars(queryURL, matches, q.varsN, m.Vars) + } + } +} + +// getHost tries its best to return the request host. +func getHost(r *http.Request) string { + if r.URL.IsAbs() { + return r.URL.Host + } + host := r.Host + // Slice off any port information. + if i := strings.Index(host, ":"); i != -1 { + host = host[:i] + } + return host + +} + +func extractVars(input string, matches []int, names []string, output map[string]string) { + for i, name := range names { + output[name] = input[matches[2*i+2]:matches[2*i+3]] + } +} diff --git a/vendor/github.com/gorilla/mux/route.go b/vendor/github.com/gorilla/mux/route.go new file mode 100644 index 000000000..293b6d493 --- /dev/null +++ b/vendor/github.com/gorilla/mux/route.go @@ -0,0 +1,636 @@ +// Copyright 2012 The Gorilla Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package mux + +import ( + "errors" + "fmt" + "net/http" + "net/url" + "regexp" + "strings" +) + +// Route stores information to match a request and build URLs. +type Route struct { + // Parent where the route was registered (a Router). + parent parentRoute + // Request handler for the route. + handler http.Handler + // List of matchers. + matchers []matcher + // Manager for the variables from host and path. + regexp *routeRegexpGroup + // If true, when the path pattern is "/path/", accessing "/path" will + // redirect to the former and vice versa. + strictSlash bool + // If true, when the path pattern is "/path//to", accessing "/path//to" + // will not redirect + skipClean bool + // If true, "/path/foo%2Fbar/to" will match the path "/path/{var}/to" + useEncodedPath bool + // If true, this route never matches: it is only used to build URLs. + buildOnly bool + // The name used to build URLs. + name string + // Error resulted from building a route. + err error + + buildVarsFunc BuildVarsFunc +} + +func (r *Route) SkipClean() bool { + return r.skipClean +} + +// Match matches the route against the request. +func (r *Route) Match(req *http.Request, match *RouteMatch) bool { + if r.buildOnly || r.err != nil { + return false + } + // Match everything. + for _, m := range r.matchers { + if matched := m.Match(req, match); !matched { + return false + } + } + // Yay, we have a match. Let's collect some info about it. + if match.Route == nil { + match.Route = r + } + if match.Handler == nil { + match.Handler = r.handler + } + if match.Vars == nil { + match.Vars = make(map[string]string) + } + // Set variables. + if r.regexp != nil { + r.regexp.setMatch(req, match, r) + } + return true +} + +// ---------------------------------------------------------------------------- +// Route attributes +// ---------------------------------------------------------------------------- + +// GetError returns an error resulted from building the route, if any. +func (r *Route) GetError() error { + return r.err +} + +// BuildOnly sets the route to never match: it is only used to build URLs. +func (r *Route) BuildOnly() *Route { + r.buildOnly = true + return r +} + +// Handler -------------------------------------------------------------------- + +// Handler sets a handler for the route. +func (r *Route) Handler(handler http.Handler) *Route { + if r.err == nil { + r.handler = handler + } + return r +} + +// HandlerFunc sets a handler function for the route. +func (r *Route) HandlerFunc(f func(http.ResponseWriter, *http.Request)) *Route { + return r.Handler(http.HandlerFunc(f)) +} + +// GetHandler returns the handler for the route, if any. +func (r *Route) GetHandler() http.Handler { + return r.handler +} + +// Name ----------------------------------------------------------------------- + +// Name sets the name for the route, used to build URLs. +// If the name was registered already it will be overwritten. +func (r *Route) Name(name string) *Route { + if r.name != "" { + r.err = fmt.Errorf("mux: route already has name %q, can't set %q", + r.name, name) + } + if r.err == nil { + r.name = name + r.getNamedRoutes()[name] = r + } + return r +} + +// GetName returns the name for the route, if any. +func (r *Route) GetName() string { + return r.name +} + +// ---------------------------------------------------------------------------- +// Matchers +// ---------------------------------------------------------------------------- + +// matcher types try to match a request. +type matcher interface { + Match(*http.Request, *RouteMatch) bool +} + +// addMatcher adds a matcher to the route. +func (r *Route) addMatcher(m matcher) *Route { + if r.err == nil { + r.matchers = append(r.matchers, m) + } + return r +} + +// addRegexpMatcher adds a host or path matcher and builder to a route. +func (r *Route) addRegexpMatcher(tpl string, matchHost, matchPrefix, matchQuery bool) error { + if r.err != nil { + return r.err + } + r.regexp = r.getRegexpGroup() + if !matchHost && !matchQuery { + if len(tpl) == 0 || tpl[0] != '/' { + return fmt.Errorf("mux: path must start with a slash, got %q", tpl) + } + if r.regexp.path != nil { + tpl = strings.TrimRight(r.regexp.path.template, "/") + tpl + } + } + rr, err := newRouteRegexp(tpl, matchHost, matchPrefix, matchQuery, r.strictSlash, r.useEncodedPath) + if err != nil { + return err + } + for _, q := range r.regexp.queries { + if err = uniqueVars(rr.varsN, q.varsN); err != nil { + return err + } + } + if matchHost { + if r.regexp.path != nil { + if err = uniqueVars(rr.varsN, r.regexp.path.varsN); err != nil { + return err + } + } + r.regexp.host = rr + } else { + if r.regexp.host != nil { + if err = uniqueVars(rr.varsN, r.regexp.host.varsN); err != nil { + return err + } + } + if matchQuery { + r.regexp.queries = append(r.regexp.queries, rr) + } else { + r.regexp.path = rr + } + } + r.addMatcher(rr) + return nil +} + +// Headers -------------------------------------------------------------------- + +// headerMatcher matches the request against header values. +type headerMatcher map[string]string + +func (m headerMatcher) Match(r *http.Request, match *RouteMatch) bool { + return matchMapWithString(m, r.Header, true) +} + +// Headers adds a matcher for request header values. +// It accepts a sequence of key/value pairs to be matched. For example: +// +// r := mux.NewRouter() +// r.Headers("Content-Type", "application/json", +// "X-Requested-With", "XMLHttpRequest") +// +// The above route will only match if both request header values match. +// If the value is an empty string, it will match any value if the key is set. +func (r *Route) Headers(pairs ...string) *Route { + if r.err == nil { + var headers map[string]string + headers, r.err = mapFromPairsToString(pairs...) + return r.addMatcher(headerMatcher(headers)) + } + return r +} + +// headerRegexMatcher matches the request against the route given a regex for the header +type headerRegexMatcher map[string]*regexp.Regexp + +func (m headerRegexMatcher) Match(r *http.Request, match *RouteMatch) bool { + return matchMapWithRegex(m, r.Header, true) +} + +// HeadersRegexp accepts a sequence of key/value pairs, where the value has regex +// support. For example: +// +// r := mux.NewRouter() +// r.HeadersRegexp("Content-Type", "application/(text|json)", +// "X-Requested-With", "XMLHttpRequest") +// +// The above route will only match if both the request header matches both regular expressions. +// It the value is an empty string, it will match any value if the key is set. +func (r *Route) HeadersRegexp(pairs ...string) *Route { + if r.err == nil { + var headers map[string]*regexp.Regexp + headers, r.err = mapFromPairsToRegex(pairs...) + return r.addMatcher(headerRegexMatcher(headers)) + } + return r +} + +// Host ----------------------------------------------------------------------- + +// Host adds a matcher for the URL host. +// It accepts a template with zero or more URL variables enclosed by {}. +// Variables can define an optional regexp pattern to be matched: +// +// - {name} matches anything until the next dot. +// +// - {name:pattern} matches the given regexp pattern. +// +// For example: +// +// r := mux.NewRouter() +// r.Host("www.example.com") +// r.Host("{subdomain}.domain.com") +// r.Host("{subdomain:[a-z]+}.domain.com") +// +// Variable names must be unique in a given route. They can be retrieved +// calling mux.Vars(request). +func (r *Route) Host(tpl string) *Route { + r.err = r.addRegexpMatcher(tpl, true, false, false) + return r +} + +// MatcherFunc ---------------------------------------------------------------- + +// MatcherFunc is the function signature used by custom matchers. +type MatcherFunc func(*http.Request, *RouteMatch) bool + +// Match returns the match for a given request. +func (m MatcherFunc) Match(r *http.Request, match *RouteMatch) bool { + return m(r, match) +} + +// MatcherFunc adds a custom function to be used as request matcher. +func (r *Route) MatcherFunc(f MatcherFunc) *Route { + return r.addMatcher(f) +} + +// Methods -------------------------------------------------------------------- + +// methodMatcher matches the request against HTTP methods. +type methodMatcher []string + +func (m methodMatcher) Match(r *http.Request, match *RouteMatch) bool { + return matchInArray(m, r.Method) +} + +// Methods adds a matcher for HTTP methods. +// It accepts a sequence of one or more methods to be matched, e.g.: +// "GET", "POST", "PUT". +func (r *Route) Methods(methods ...string) *Route { + for k, v := range methods { + methods[k] = strings.ToUpper(v) + } + return r.addMatcher(methodMatcher(methods)) +} + +// Path ----------------------------------------------------------------------- + +// Path adds a matcher for the URL path. +// It accepts a template with zero or more URL variables enclosed by {}. The +// template must start with a "/". +// Variables can define an optional regexp pattern to be matched: +// +// - {name} matches anything until the next slash. +// +// - {name:pattern} matches the given regexp pattern. +// +// For example: +// +// r := mux.NewRouter() +// r.Path("/products/").Handler(ProductsHandler) +// r.Path("/products/{key}").Handler(ProductsHandler) +// r.Path("/articles/{category}/{id:[0-9]+}"). +// Handler(ArticleHandler) +// +// Variable names must be unique in a given route. They can be retrieved +// calling mux.Vars(request). +func (r *Route) Path(tpl string) *Route { + r.err = r.addRegexpMatcher(tpl, false, false, false) + return r +} + +// PathPrefix ----------------------------------------------------------------- + +// PathPrefix adds a matcher for the URL path prefix. This matches if the given +// template is a prefix of the full URL path. See Route.Path() for details on +// the tpl argument. +// +// Note that it does not treat slashes specially ("/foobar/" will be matched by +// the prefix "/foo") so you may want to use a trailing slash here. +// +// Also note that the setting of Router.StrictSlash() has no effect on routes +// with a PathPrefix matcher. +func (r *Route) PathPrefix(tpl string) *Route { + r.err = r.addRegexpMatcher(tpl, false, true, false) + return r +} + +// Query ---------------------------------------------------------------------- + +// Queries adds a matcher for URL query values. +// It accepts a sequence of key/value pairs. Values may define variables. +// For example: +// +// r := mux.NewRouter() +// r.Queries("foo", "bar", "id", "{id:[0-9]+}") +// +// The above route will only match if the URL contains the defined queries +// values, e.g.: ?foo=bar&id=42. +// +// It the value is an empty string, it will match any value if the key is set. +// +// Variables can define an optional regexp pattern to be matched: +// +// - {name} matches anything until the next slash. +// +// - {name:pattern} matches the given regexp pattern. +func (r *Route) Queries(pairs ...string) *Route { + length := len(pairs) + if length%2 != 0 { + r.err = fmt.Errorf( + "mux: number of parameters must be multiple of 2, got %v", pairs) + return nil + } + for i := 0; i < length; i += 2 { + if r.err = r.addRegexpMatcher(pairs[i]+"="+pairs[i+1], false, false, true); r.err != nil { + return r + } + } + + return r +} + +// Schemes -------------------------------------------------------------------- + +// schemeMatcher matches the request against URL schemes. +type schemeMatcher []string + +func (m schemeMatcher) Match(r *http.Request, match *RouteMatch) bool { + return matchInArray(m, r.URL.Scheme) +} + +// Schemes adds a matcher for URL schemes. +// It accepts a sequence of schemes to be matched, e.g.: "http", "https". +func (r *Route) Schemes(schemes ...string) *Route { + for k, v := range schemes { + schemes[k] = strings.ToLower(v) + } + return r.addMatcher(schemeMatcher(schemes)) +} + +// BuildVarsFunc -------------------------------------------------------------- + +// BuildVarsFunc is the function signature used by custom build variable +// functions (which can modify route variables before a route's URL is built). +type BuildVarsFunc func(map[string]string) map[string]string + +// BuildVarsFunc adds a custom function to be used to modify build variables +// before a route's URL is built. +func (r *Route) BuildVarsFunc(f BuildVarsFunc) *Route { + r.buildVarsFunc = f + return r +} + +// Subrouter ------------------------------------------------------------------ + +// Subrouter creates a subrouter for the route. +// +// It will test the inner routes only if the parent route matched. For example: +// +// r := mux.NewRouter() +// s := r.Host("www.example.com").Subrouter() +// s.HandleFunc("/products/", ProductsHandler) +// s.HandleFunc("/products/{key}", ProductHandler) +// s.HandleFunc("/articles/{category}/{id:[0-9]+}"), ArticleHandler) +// +// Here, the routes registered in the subrouter won't be tested if the host +// doesn't match. +func (r *Route) Subrouter() *Router { + router := &Router{parent: r, strictSlash: r.strictSlash} + r.addMatcher(router) + return router +} + +// ---------------------------------------------------------------------------- +// URL building +// ---------------------------------------------------------------------------- + +// URL builds a URL for the route. +// +// It accepts a sequence of key/value pairs for the route variables. For +// example, given this route: +// +// r := mux.NewRouter() +// r.HandleFunc("/articles/{category}/{id:[0-9]+}", ArticleHandler). +// Name("article") +// +// ...a URL for it can be built using: +// +// url, err := r.Get("article").URL("category", "technology", "id", "42") +// +// ...which will return an url.URL with the following path: +// +// "/articles/technology/42" +// +// This also works for host variables: +// +// r := mux.NewRouter() +// r.Host("{subdomain}.domain.com"). +// HandleFunc("/articles/{category}/{id:[0-9]+}", ArticleHandler). +// Name("article") +// +// // url.String() will be "http://news.domain.com/articles/technology/42" +// url, err := r.Get("article").URL("subdomain", "news", +// "category", "technology", +// "id", "42") +// +// All variables defined in the route are required, and their values must +// conform to the corresponding patterns. +func (r *Route) URL(pairs ...string) (*url.URL, error) { + if r.err != nil { + return nil, r.err + } + if r.regexp == nil { + return nil, errors.New("mux: route doesn't have a host or path") + } + values, err := r.prepareVars(pairs...) + if err != nil { + return nil, err + } + var scheme, host, path string + if r.regexp.host != nil { + // Set a default scheme. + scheme = "http" + if host, err = r.regexp.host.url(values); err != nil { + return nil, err + } + } + if r.regexp.path != nil { + if path, err = r.regexp.path.url(values); err != nil { + return nil, err + } + } + return &url.URL{ + Scheme: scheme, + Host: host, + Path: path, + }, nil +} + +// URLHost builds the host part of the URL for a route. See Route.URL(). +// +// The route must have a host defined. +func (r *Route) URLHost(pairs ...string) (*url.URL, error) { + if r.err != nil { + return nil, r.err + } + if r.regexp == nil || r.regexp.host == nil { + return nil, errors.New("mux: route doesn't have a host") + } + values, err := r.prepareVars(pairs...) + if err != nil { + return nil, err + } + host, err := r.regexp.host.url(values) + if err != nil { + return nil, err + } + return &url.URL{ + Scheme: "http", + Host: host, + }, nil +} + +// URLPath builds the path part of the URL for a route. See Route.URL(). +// +// The route must have a path defined. +func (r *Route) URLPath(pairs ...string) (*url.URL, error) { + if r.err != nil { + return nil, r.err + } + if r.regexp == nil || r.regexp.path == nil { + return nil, errors.New("mux: route doesn't have a path") + } + values, err := r.prepareVars(pairs...) + if err != nil { + return nil, err + } + path, err := r.regexp.path.url(values) + if err != nil { + return nil, err + } + return &url.URL{ + Path: path, + }, nil +} + +// GetPathTemplate returns the template used to build the +// route match. +// This is useful for building simple REST API documentation and for instrumentation +// against third-party services. +// An error will be returned if the route does not define a path. +func (r *Route) GetPathTemplate() (string, error) { + if r.err != nil { + return "", r.err + } + if r.regexp == nil || r.regexp.path == nil { + return "", errors.New("mux: route doesn't have a path") + } + return r.regexp.path.template, nil +} + +// GetHostTemplate returns the template used to build the +// route match. +// This is useful for building simple REST API documentation and for instrumentation +// against third-party services. +// An error will be returned if the route does not define a host. +func (r *Route) GetHostTemplate() (string, error) { + if r.err != nil { + return "", r.err + } + if r.regexp == nil || r.regexp.host == nil { + return "", errors.New("mux: route doesn't have a host") + } + return r.regexp.host.template, nil +} + +// prepareVars converts the route variable pairs into a map. If the route has a +// BuildVarsFunc, it is invoked. +func (r *Route) prepareVars(pairs ...string) (map[string]string, error) { + m, err := mapFromPairsToString(pairs...) + if err != nil { + return nil, err + } + return r.buildVars(m), nil +} + +func (r *Route) buildVars(m map[string]string) map[string]string { + if r.parent != nil { + m = r.parent.buildVars(m) + } + if r.buildVarsFunc != nil { + m = r.buildVarsFunc(m) + } + return m +} + +// ---------------------------------------------------------------------------- +// parentRoute +// ---------------------------------------------------------------------------- + +// parentRoute allows routes to know about parent host and path definitions. +type parentRoute interface { + getNamedRoutes() map[string]*Route + getRegexpGroup() *routeRegexpGroup + buildVars(map[string]string) map[string]string +} + +// getNamedRoutes returns the map where named routes are registered. +func (r *Route) getNamedRoutes() map[string]*Route { + if r.parent == nil { + // During tests router is not always set. + r.parent = NewRouter() + } + return r.parent.getNamedRoutes() +} + +// getRegexpGroup returns regexp definitions from this route. +func (r *Route) getRegexpGroup() *routeRegexpGroup { + if r.regexp == nil { + if r.parent == nil { + // During tests router is not always set. + r.parent = NewRouter() + } + regexp := r.parent.getRegexpGroup() + if regexp == nil { + r.regexp = new(routeRegexpGroup) + } else { + // Copy. + r.regexp = &routeRegexpGroup{ + host: regexp.host, + path: regexp.path, + queries: regexp.queries, + } + } + } + return r.regexp +} diff --git a/vendor/vendor.json b/vendor/vendor.json index 33fdb527a..351a8238d 100644 --- a/vendor/vendor.json +++ b/vendor/vendor.json @@ -15,6 +15,24 @@ "revisionTime": "2016-11-17T03:31:26Z" }, { + "checksumSHA1": "g/V4qrXjUGG9B+e3hB+4NAYJ5Gs=", + "path": "github.com/gorilla/context", + "revision": "08b5f424b9271eedf6f9f0ce86cb9396ed337a42", + "revisionTime": "2016-08-17T18:46:32Z" + }, + { + "checksumSHA1": "I+GdpjQMP4tAYwF4CAklylRWeYI=", + "path": "github.com/gorilla/handlers", + "revision": "3a5767ca75ece5f7f1440b1d16975247f8d8b221", + "revisionTime": "2016-12-06T05:51:44Z" + }, + { + "checksumSHA1": "urMd7A9QPAJYY0GZJL9qBhlUmD8=", + "path": "github.com/gorilla/mux", + "revision": "757bef944d0f21880861c2dd9c871ca543023cba", + "revisionTime": "2016-09-20T23:08:13Z" + }, + { "checksumSHA1": "ngWgR7cRhH340bOHEpLTJCY1jTs=", "path": "github.com/kelseyhightower/envconfig", "revision": "5c008110b20b657eb7e005b83d0a5f6aa6bb5f4b", |