blob: 1ae1c1a69c04a17ec7c039316cc6c9ab9cf001bf [file] [log] [blame]
// ui-api-proxy is a reverse http proxy that allows the UI to be served from
// a different host than the API. This allows testing new UI features served
// from localhost but using live production data.
//
// Run the binary, download & install the Go tools available at
// http://golang.org/doc/install . To run, execute `go run ui-api-proxy.go`.
// For a description of the available flags, execute
// `go run ui-api-proxy.go --help`.
package main
import (
"flag"
"fmt"
"log"
"net"
"net/http"
"net/http/httputil"
"net/url"
"strings"
"time"
)
var (
ui = flag.String("ui", "http://localhost:8080", "host to which ui requests will be forwarded")
api = flag.String("api", "https://gerrit-review.googlesource.com", "host to which api requests will be forwarded")
port = flag.Int("port", 0, "port on which to run this server")
)
func main() {
flag.Parse()
uiURL, err := url.Parse(*ui)
if err != nil {
log.Fatalf("proxy: parsing ui addr %q failed: %v\n", *ui, err)
}
apiURL, err := url.Parse(*api)
if err != nil {
log.Fatalf("proxy: parsing api addr %q failed: %v\n", *api, err)
}
l, err := net.Listen("tcp", fmt.Sprintf("127.0.0.1:%v", *port))
if err != nil {
log.Fatalln("proxy: listen failed: ", err)
}
defer l.Close()
fmt.Printf("OK\nListening on http://%v/\n", l.Addr())
err = http.Serve(l, &httputil.ReverseProxy{
FlushInterval: 500 * time.Millisecond,
Director: func(r *http.Request) {
if strings.HasPrefix(r.URL.Path, "/changes/") || strings.HasPrefix(r.URL.Path, "/projects/") {
r.URL.Scheme, r.URL.Host = apiURL.Scheme, apiURL.Host
} else {
r.URL.Scheme, r.URL.Host = uiURL.Scheme, uiURL.Host
}
if r.URL.Scheme == "" {
r.URL.Scheme = "http"
}
r.Host, r.URL.Opaque, r.URL.RawQuery = r.URL.Host, r.RequestURI, ""
},
})
if err != nil {
log.Fatalln("proxy: serve failed: ", err)
}
}