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// Copyright 2013 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.
// Package playground registers HTTP handlers at "/compile" and "/share" that
// proxy requests to the golang.org playground service.
// This package may be used unaltered on App Engine.
package playground // import "golang.org/x/tools/playground"
import (
"bytes"
"context"
"errors"
"fmt"
"io"
"net/http"
"time"
)
const baseURL = "https://play.golang.org"
func init() {
http.HandleFunc("/compile", bounce)
http.HandleFunc("/share", bounce)
}
func bounce(w http.ResponseWriter, r *http.Request) {
b := new(bytes.Buffer)
if err := passThru(b, r); err != nil {
http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
report(r, err)
return
}
io.Copy(w, b)
}
func passThru(w io.Writer, req *http.Request) error {
if req.URL.Path == "/share" && !allowShare(req) {
return errors.New("Forbidden")
}
defer req.Body.Close()
url := baseURL + req.URL.Path
ctx, cancel := context.WithTimeout(contextFunc(req), 60*time.Second)
defer cancel()
r, err := post(ctx, url, req.Header.Get("Content-type"), req.Body)
if err != nil {
return fmt.Errorf("making POST request: %v", err)
}
defer r.Body.Close()
if _, err := io.Copy(w, r.Body); err != nil {
return fmt.Errorf("copying response Body: %v", err)
}
return nil
}
var onAppengine = false // will be overridden by appengine.go
func allowShare(r *http.Request) bool {
if !onAppengine {
return true
}
switch r.Header.Get("X-AppEngine-Country") {
case "", "ZZ", "CN":
return false
}
return true
}
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