// putDefaultACLRule adds the "allUsers" default object ACL rule for this bucket.
func (d *demo) putDefaultACLRule() {
io.WriteString(d.w, "\nPut Default object ACL Rule:\n")
err := storage.PutDefaultACLRule(d.ctx, d.bucket, "allUsers", storage.RoleReader)
if err != nil {
d.errorf("putDefaultACLRule: unable to save default object ACL rule for bucket %q: %v", d.bucket, err)
return
}
d.dumpDefaultACL()
}
func storeImage(rw http.ResponseWriter, req *http.Request) {
// Appengine
var c appengine.Context
// Google Cloud Storage authentication
var cc gcscontext.Context
// Google Cloud Storage bucket name
var bucket string = ""
// User uploaded image file name
var fileName string = uuid.New()
// User uploaded image file type
var contentType string = ""
// User uploaded image file raw data
var b []byte
// Result, 0: success, 1: failed
var r int = 0
// Set response in the end
defer func() {
// Return status. WriteHeader() must be called before call to Write
if r == 0 {
// Changing the header after a call to WriteHeader (or Write) has no effect.
// rw.Header().Set("Location", req.URL.String()+"/"+cKey.Encode())
rw.Header().Set("Location", "http://"+bucket+".storage.googleapis.com/"+fileName)
rw.WriteHeader(http.StatusCreated)
} else {
http.Error(rw, http.StatusText(http.StatusBadRequest), http.StatusBadRequest)
}
}()
// To log information in Google APP Engine console
c = appengine.NewContext(req)
// Get data from body
b, err := ioutil.ReadAll(req.Body)
if err != nil {
c.Errorf("%s in reading body", err)
r = 1
return
}
c.Infof("Body length %d bytes, read %d bytes", req.ContentLength, len(b))
// Determine filename extension from content type
contentType = req.Header["Content-Type"][0]
switch contentType {
case "image/jpeg":
fileName += ".jpg"
default:
c.Errorf("Unknown or unsupported content type '%s'. Valid: image/jpeg", contentType)
r = 1
return
}
c.Infof("Content type %s is received, %s is detected.", contentType, http.DetectContentType(b))
// Get default bucket name
cc = gcsappengine.NewContext(req)
if bucket, err = gcsfile.DefaultBucketName(cc); err != nil {
c.Errorf("%s in getting default GCS bucket name", err)
r = 1
return
}
c.Infof("APP Engine Version: %s", gcsappengine.VersionID(cc))
c.Infof("Using bucket name: %s", bucket)
// Prepare Google Cloud Storage authentication
hc := &http.Client{
Transport: &oauth2.Transport{
Source: google.AppEngineTokenSource(cc, storage.ScopeFullControl),
// Note that the App Engine urlfetch service has a limit of 10MB uploads and
// 32MB downloads.
// See https://cloud.google.com/appengine/docs/go/urlfetch/#Go_Quotas_and_limits
// for more information.
Base: &gcsurlfetch.Transport{Context: cc},
},
}
ctx := cloud.NewContext(gcsappengine.AppID(cc), hc)
// Change default object ACLs
err = storage.PutDefaultACLRule(ctx, bucket, "allUsers", storage.RoleReader)
// err = storage.PutACLRule(ctx, bucket, fileName, "allUsers", storage.RoleReader)
if err != nil {
c.Errorf("%v in saving ACL rule for bucket %q", err, bucket)
return
}
// Store file in Google Cloud Storage
wc := storage.NewWriter(ctx, bucket, fileName)
wc.ContentType = contentType
// wc.Metadata = map[string]string{
// "x-goog-meta-foo": "foo",
// "x-goog-meta-bar": "bar",
// }
if _, err := wc.Write(b); err != nil {
c.Errorf("CreateFile: unable to write data to bucket %q, file %q: %v", bucket, fileName, err)
r = 1
return
}
if err := wc.Close(); err != nil {
c.Errorf("CreateFile: unable to close bucket %q, file %q: %v", bucket, fileName, err)
r = 1
return
}
c.Infof("/%v/%v\n created", bucket, fileName)
}