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