00e5dc600b
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. Change-Id: I1cef74c995ac21f4310c5ced4c042ece59a1a8e8
66 lines
1.8 KiB
Go
66 lines
1.8 KiB
Go
// ui-api-proxy is a reverse http proxy that allows the UI to be served from
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// a different host than the API. This allows testing new UI features served
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// from localhost but using live production data.
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//
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// Run the binary, download & install the Go tools available at
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// http://golang.org/doc/install . To run, execute `go run ui-api-proxy.go`.
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// For a description of the available flags, execute
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// `go run ui-api-proxy.go --help`.
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package main
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import (
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"flag"
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"fmt"
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"log"
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"net"
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"net/http"
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"net/http/httputil"
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"net/url"
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"strings"
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"time"
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)
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var (
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ui = flag.String("ui", "http://localhost:8080", "host to which ui requests will be forwarded")
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api = flag.String("api", "https://gerrit-review.googlesource.com", "host to which api requests will be forwarded")
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port = flag.Int("port", 0, "port on which to run this server")
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)
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func main() {
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flag.Parse()
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uiURL, err := url.Parse(*ui)
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if err != nil {
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log.Fatalf("proxy: parsing ui addr %q failed: %v\n", *ui, err)
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}
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apiURL, err := url.Parse(*api)
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if err != nil {
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log.Fatalf("proxy: parsing api addr %q failed: %v\n", *api, err)
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}
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l, err := net.Listen("tcp", fmt.Sprintf("127.0.0.1:%v", *port))
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if err != nil {
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log.Fatalln("proxy: listen failed: ", err)
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}
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defer l.Close()
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fmt.Printf("OK\nListening on http://%v/\n", l.Addr())
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err = http.Serve(l, &httputil.ReverseProxy{
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FlushInterval: 500 * time.Millisecond,
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Director: func(r *http.Request) {
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if strings.HasPrefix(r.URL.Path, "/changes/") || strings.HasPrefix(r.URL.Path, "/projects/") {
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r.URL.Scheme, r.URL.Host = apiURL.Scheme, apiURL.Host
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} else {
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r.URL.Scheme, r.URL.Host = uiURL.Scheme, uiURL.Host
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}
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if r.URL.Scheme == "" {
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r.URL.Scheme = "http"
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}
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r.Host, r.URL.Opaque, r.URL.RawQuery = r.URL.Host, r.RequestURI, ""
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},
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})
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if err != nil {
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log.Fatalln("proxy: serve failed: ", err)
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}
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}
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