/usr/share/gocode/src/github.com/jacobsa/gcloud/gcs/compose_objects.go is in golang-github-jacobsa-gcloud-dev 0.0~git20150709-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 | // Copyright 2015 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 in writing, software
// distributed under the License is distributed on an "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 gcs
import (
"bytes"
"encoding/json"
"errors"
"fmt"
"io"
"io/ioutil"
"net/http"
"net/url"
"unicode/utf8"
"github.com/jacobsa/gcloud/httputil"
"google.golang.org/api/googleapi"
storagev1 "google.golang.org/api/storage/v1"
"golang.org/x/net/context"
)
func (b *bucket) makeComposeObjectsBody(
req *ComposeObjectsRequest) (rc io.ReadCloser, err error) {
// Create a request in the form expected by the API.
r := storagev1.ComposeRequest{
Destination: &storagev1.Object{
Name: req.DstName,
// We get an HTTP 400 if we don't set this.
// Cf. Google-internal bug 21588058.
ContentType: "application/octet-stream",
},
}
for _, src := range req.Sources {
s := &storagev1.ComposeRequestSourceObjects{
Name: src.Name,
Generation: src.Generation,
}
r.SourceObjects = append(r.SourceObjects, s)
}
// Serialize it.
j, err := json.Marshal(&r)
if err != nil {
err = fmt.Errorf("json.Marshal: %v", err)
return
}
// Create a ReadCloser.
rc = ioutil.NopCloser(bytes.NewReader(j))
return
}
func (b *bucket) ComposeObjects(
ctx context.Context,
req *ComposeObjectsRequest) (o *Object, err error) {
// We encode using json.NewEncoder, which is documented to silently transform
// invalid UTF-8 (cf. http://goo.gl/3gIUQB). So we can't rely on the server
// to detect this for us.
if !utf8.ValidString(req.DstName) {
err = errors.New("Invalid object name: not valid UTF-8")
return
}
// Construct an appropriate URL.
bucketSegment := httputil.EncodePathSegment(b.Name())
objectSegment := httputil.EncodePathSegment(req.DstName)
opaque := fmt.Sprintf(
"//www.googleapis.com/storage/v1/b/%s/o/%s/compose",
bucketSegment,
objectSegment)
query := make(url.Values)
if req.DstGenerationPrecondition != nil {
query.Set("ifGenerationMatch", fmt.Sprint(*req.DstGenerationPrecondition))
}
url := &url.URL{
Scheme: "https",
Host: "www.googleapis.com",
Opaque: opaque,
RawQuery: query.Encode(),
}
// Set up the request body.
body, err := b.makeComposeObjectsBody(req)
if err != nil {
err = fmt.Errorf("makeComposeObjectsBody: %v", err)
return
}
// Create the HTTP request.
httpReq, err := httputil.NewRequest(
"POST",
url,
body,
b.userAgent)
if err != nil {
err = fmt.Errorf("httputil.NewRequest: %v", err)
return
}
// Set up HTTP request headers.
httpReq.Header.Set("Content-Type", "application/json")
// Execute the HTTP request.
httpRes, err := httputil.Do(ctx, b.client, httpReq)
if err != nil {
return
}
defer googleapi.CloseBody(httpRes)
// Check for HTTP-level errors.
if err = googleapi.CheckResponse(httpRes); err != nil {
// Special case: handle not found and precondition errors.
if typed, ok := err.(*googleapi.Error); ok {
switch typed.Code {
case http.StatusNotFound:
err = &NotFoundError{Err: typed}
case http.StatusPreconditionFailed:
err = &PreconditionError{Err: typed}
}
}
return
}
// Parse the response.
var rawObject *storagev1.Object
if err = json.NewDecoder(httpRes.Body).Decode(&rawObject); err != nil {
return
}
// Convert the response.
if o, err = toObject(rawObject); err != nil {
err = fmt.Errorf("toObject: %v", err)
return
}
return
}
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