Add generated file

This PR adds generated files under pkg/client and vendor folder.

vendor/golang.org/x/tools/godoc/proxy/proxy.go

@@ -0,0 +1,148 @@
+// Copyright 2015 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build appengine
+
+// Package proxy proxies requests to the playground's compile and share handlers.
+// It is designed to run only on the instance of godoc that serves golang.org.
+package proxy
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"net/http/httputil"
+	"net/url"
+	"strings"
+	"time"
+
+	"golang.org/x/net/context"
+
+	"google.golang.org/appengine"
+	"google.golang.org/appengine/log"
+	"google.golang.org/appengine/urlfetch"
+)
+
+type Request struct {
+	Body string
+}
+
+type Response struct {
+	Errors string
+	Events []Event
+}
+
+type Event struct {
+	Message string
+	Kind    string        // "stdout" or "stderr"
+	Delay   time.Duration // time to wait before printing Message
+}
+
+const playgroundURL = "https://play.golang.org"
+
+const expires = 7 * 24 * time.Hour // 1 week
+var cacheControlHeader = fmt.Sprintf("public, max-age=%d", int(expires.Seconds()))
+
+func RegisterHandlers(mux *http.ServeMux) {
+	mux.HandleFunc("/compile", compile)
+	mux.HandleFunc("/share", share)
+}
+
+func compile(w http.ResponseWriter, r *http.Request) {
+	if r.Method != "POST" {
+		http.Error(w, "I only answer to POST requests.", http.StatusMethodNotAllowed)
+		return
+	}
+
+	ctx := appengine.NewContext(r)
+
+	body := r.FormValue("body")
+	res := &Response{}
+	req := &Request{Body: body}
+	if err := makeCompileRequest(ctx, req, res); err != nil {
+		log.Errorf(ctx, "compile error: %v", err)
+		http.Error(w, "Internal Server Error", http.StatusInternalServerError)
+		return
+	}
+
+	expiresTime := time.Now().Add(expires).UTC()
+	w.Header().Set("Expires", expiresTime.Format(time.RFC1123))
+	w.Header().Set("Cache-Control", cacheControlHeader)
+
+	var out interface{}
+	switch r.FormValue("version") {
+	case "2":
+		out = res
+	default: // "1"
+		out = struct {
+			CompileErrors string `json:"compile_errors"`
+			Output        string `json:"output"`
+		}{res.Errors, flatten(res.Events)}
+	}
+	if err := json.NewEncoder(w).Encode(out); err != nil {
+		log.Errorf(ctx, "encoding response: %v", err)
+	}
+}
+
+// makePlaygroundRequest sends the given Request to the playground compile
+// endpoint and stores the response in the given Response.
+func makeCompileRequest(ctx context.Context, req *Request, res *Response) error {
+	reqJ, err := json.Marshal(req)
+	if err != nil {
+		return fmt.Errorf("marshalling request: %v", err)
+	}
+	r, err := urlfetch.Client(ctx).Post(playgroundURL+"/compile", "application/json", bytes.NewReader(reqJ))
+	if err != nil {
+		return fmt.Errorf("making request: %v", err)
+	}
+	defer r.Body.Close()
+	if r.StatusCode != http.StatusOK {
+		b, _ := ioutil.ReadAll(r.Body)
+		return fmt.Errorf("bad status: %v body:\n%s", r.Status, b)
+	}
+	err = json.NewDecoder(r.Body).Decode(res)
+	if err != nil {
+		return fmt.Errorf("unmarshalling response: %v", err)
+	}
+	return nil
+}
+
+// flatten takes a sequence of Events and returns their contents, concatenated.
+func flatten(seq []Event) string {
+	var buf bytes.Buffer
+	for _, e := range seq {
+		buf.WriteString(e.Message)
+	}
+	return buf.String()
+}
+
+func share(w http.ResponseWriter, r *http.Request) {
+	if googleCN(r) {
+		http.Error(w, http.StatusText(http.StatusForbidden), http.StatusForbidden)
+		return
+	}
+	target, _ := url.Parse(playgroundURL)
+	p := httputil.NewSingleHostReverseProxy(target)
+	p.Transport = &urlfetch.Transport{Context: appengine.NewContext(r)}
+	p.ServeHTTP(w, r)
+}
+
+func googleCN(r *http.Request) bool {
+	if r.FormValue("googlecn") != "" {
+		return true
+	}
+	if appengine.IsDevAppServer() {
+		return false
+	}
+	if strings.HasSuffix(r.Host, ".cn") {
+		return true
+	}
+	switch r.Header.Get("X-AppEngine-Country") {
+	case "", "ZZ", "CN":
+		return true
+	}
+	return false
+}