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|
package main
import (
"crypto/tls"
"flag"
"fmt"
"log"
"net/http"
"path/filepath"
"strings"
"sync"
"time"
)
// VERSION stores the information about the semantic version of application
var VERSION = "dev"
// REVISION stores the information about the git revision of application
var REVISION = "HEAD"
var listenHTTP = flag.String("listen-http", ":80", "The address to listen for HTTP requests")
var listenHTTPS = flag.String("listen-https", "", "The address to listen for HTTPS requests")
var listenProxy = flag.String("listen-proxy", "", "The address to listen for proxy requests")
var pagesDomain = flag.String("pages-domain", "gitlab-example.com", "The domain to serve static pages")
var pagesRootCert = flag.String("root-cert", "", "The default path to file certificate to serve static pages")
var pagesRootKey = flag.String("root-key", "", "The default path to file certificate to serve static pages")
var serverHTTP = flag.Bool("serve-http", true, "Serve the pages under HTTP")
var http2proto = flag.Bool("http2", true, "Enable HTTP2 support")
var pagesRoot = flag.String("pages-root", "shared/pages", "The directory where pages are stored")
const xForwardedProto = "X-Forwarded-Proto"
const xForwardedProtoHTTPS = "https"
type theApp struct {
domains domains
lock sync.RWMutex
}
func (a *theApp) domain(host string) *domain {
a.lock.RLock()
defer a.lock.RUnlock()
domain, _ := a.domains[host]
return domain
}
func (a *theApp) ServeTLS(ch *tls.ClientHelloInfo) (*tls.Certificate, error) {
if ch.ServerName == "" {
return nil, nil
}
host := strings.ToLower(ch.ServerName)
if domain := a.domain(host); domain != nil {
tls, _ := domain.ensureCertificate()
return tls, nil
}
return nil, nil
}
func (a *theApp) serveContent(ww http.ResponseWriter, r *http.Request, https bool) {
w := newLoggingResponseWriter(ww)
defer w.Log(r)
// Add auto redirect
if https && !*serverHTTP {
u := *r.URL
u.Scheme = "https"
u.Host = r.Host
u.User = nil
http.Redirect(&w, r, u.String(), 307)
return
}
host := strings.ToLower(r.Host)
domain := a.domain(host)
if domain == nil {
http.NotFound(&w, r)
return
}
// Serve static file
domain.ServeHTTP(&w, r)
}
func (a *theApp) ServeHTTP(ww http.ResponseWriter, r *http.Request) {
https := r.TLS != nil
a.serveContent(ww, r, https)
}
func (a *theApp) ServeProxy(ww http.ResponseWriter, r *http.Request) {
forwardedProto := r.Header.Get(xForwardedProto)
https := forwardedProto == xForwardedProtoHTTPS
a.serveContent(ww, r, https)
}
func (a *theApp) UpdateDomains(domains domains) {
fmt.Printf("Domains: %v", domains)
a.lock.Lock()
a.domains = domains
a.lock.Unlock()
}
func main() {
var wg sync.WaitGroup
var app theApp
fmt.Printf("GitLab Pages Daemon %s (%s)", VERSION, REVISION)
fmt.Printf("URL: https://gitlab.com/gitlab-org/gitlab-pages")
flag.Parse()
fullPath, err := filepath.EvalSymlinks(*pagesRoot)
if err != nil {
log.Fatalln(err)
}
*pagesRoot = fullPath
// Listen for HTTP
if *listenHTTP != "" {
wg.Add(1)
go func() {
defer wg.Done()
err := listenAndServe(*listenHTTP, app.ServeHTTP)
if err != nil {
log.Fatal(err)
}
}()
}
// Listen for HTTPS
if *listenHTTPS != "" {
wg.Add(1)
go func() {
defer wg.Done()
err := listenAndServeTLS(*listenHTTPS, *pagesRootCert, *pagesRootKey, app.ServeHTTP, app.ServeTLS)
if err != nil {
log.Fatal(err)
}
}()
}
// Listen for HTTP proxy requests
if *listenProxy != "" {
wg.Add(1)
go func() {
defer wg.Done()
err := listenAndServe(*listenProxy, app.ServeProxy)
if err != nil {
log.Fatal(err)
}
}()
}
go watchDomains(app.UpdateDomains, time.Second)
wg.Wait()
}
|
