/
fetch.go
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/
fetch.go
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// Copyright 2017 Google Inc. All rights reserved.
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to writing, software distributed
// under the License is distributed on a "AS IS" BASIS, WITHOUT WARRANTIES OR
// CONDITIONS OF ANY KIND, either express or implied.
//
// See the License for the specific language governing permissions and
// limitations under the License.
package fetch
import (
"io"
"net/http"
"google.golang.org/appengine"
"google.golang.org/appengine/log"
"google.golang.org/appengine/urlfetch"
)
func handler(w http.ResponseWriter, r *http.Request) {
ctx := appengine.NewContext(r)
// create a new HTTP client
c := urlfetch.Client(ctx)
// and use it to request the Google homepage
res, err := c.Get("https://google.com")
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
// we need to close the body at the end of this function
defer res.Body.Close()
// then we can dump the whole webpage onto our output
_, err = io.Copy(w, res.Body)
if err != nil {
log.Errorf(ctx, "could not copy the response: %v", err)
}
}
func init() {
http.HandleFunc("/", handler)
}