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package main
import (
"crypto/tls"
"errors"
"fmt"
"net/http"
"os"
"path/filepath"
"strings"
)
type domain struct {
Group string
Project string
Config *domainConfig
certificate *tls.Certificate
certificateError error
}
func (d *domain) notFound(w http.ResponseWriter, r *http.Request) {
http.NotFound(w, r)
}
func (d *domain) serveFile(w http.ResponseWriter, r *http.Request, fullPath string) bool {
// Open and serve content of file
file, err := os.Open(fullPath)
if err != nil {
return false
}
defer file.Close()
fi, err := file.Stat()
if err != nil {
return false
}
println("Serving", fullPath, "for", r.URL.Path)
http.ServeContent(w, r, filepath.Base(file.Name()), fi.ModTime(), file)
return true
}
func (d *domain) resolvePath(w http.ResponseWriter, r *http.Request, projectName, subPath string) (fullPath string, err error) {
publicPath := filepath.Join(d.Group, projectName, "public")
fullPath = filepath.Join(publicPath, subPath)
fullPath, err = filepath.EvalSymlinks(fullPath)
if err != nil {
return
}
if !strings.HasPrefix(fullPath, publicPath+"/") && fullPath != publicPath {
err = fmt.Errorf("%q should be in %q", fullPath, publicPath)
return
}
return
}
func (d *domain) checkPath(w http.ResponseWriter, r *http.Request, path string) (fullPath string, err error) {
fullPath = path
fi, err := os.Lstat(fullPath)
if err != nil {
return
}
// If this file is directory, open the index.html
if fi.IsDir() {
fullPath = filepath.Join(fullPath, "index.html")
fi, err = os.Lstat(fullPath)
if err != nil {
return
}
}
// We don't allow to open non-regular files
if !fi.Mode().IsRegular() {
err = fmt.Errorf("%s: is not a regular file", fullPath)
return
}
return
}
func (d *domain) tryFile(w http.ResponseWriter, r *http.Request, projectName, subPath string) bool {
path, err := d.resolvePath(w, r, projectName, subPath)
if err != nil {
return false
}
path, err = d.checkPath(w, r, path)
if err != nil {
return false
}
return d.serveFile(w, r, path)
}
func (d *domain) serveFromGroup(w http.ResponseWriter, r *http.Request) {
// The Path always contains "/" at the beggining
split := strings.SplitN(r.URL.Path, "/", 3)
if len(split) >= 2 {
subPath := ""
if len(split) >= 3 {
subPath = split[2]
}
if d.tryFile(w, r, split[1], subPath) {
return
}
}
if r.Host != "" && d.tryFile(w, r, strings.ToLower(r.Host), r.URL.Path) {
return
}
d.notFound(w, r)
}
func (d *domain) serveFromConfig(w http.ResponseWriter, r *http.Request) {
if d.tryFile(w, r, d.Project, r.URL.Path) {
return
}
d.notFound(w, r)
}
func (d *domain) ensureCertificate() (*tls.Certificate, error) {
if d.Config == nil {
return nil, errors.New("tls certificates can be loaded only for pages with configuration")
}
if d.certificate != nil || d.certificateError != nil {
return d.certificate, d.certificateError
}
tls, err := tls.X509KeyPair([]byte(d.Config.Certificate), []byte(d.Config.Key))
if err != nil {
d.certificateError = err
return nil, err
}
d.certificate = &tls
return d.certificate, nil
}
func (d *domain) ServeHTTP(w http.ResponseWriter, r *http.Request) {
if d.Config != nil {
d.serveFromConfig(w, r)
} else {
d.serveFromGroup(w, r)
}
}
|
