func RespondWithHeader(url string, c appengine.Context, w http.ResponseWriter, r *http.Request) error {
w.Header().Set("Content-Type", "image/jpeg")
blobKey, err := blobstore.BlobKeyForFile(c, blobFileName(url))
if err == nil {
w.Header().Set("X-AppEngine-BlobKey", string(blobKey))
fmt.Fprintln(w, "")
}
return err
}
func (d *gcsDriver) Serve(w http.ResponseWriter, id string, rng driver.Range) (bool, error) {
if rng.IsValid() {
w.Header().Set("X-AppEngine-BlobRange", rng.String())
}
key, err := blobstore.BlobKeyForFile(d.c, d.path(id))
if err != nil {
return false, err
}
blobstore.Send(w, key)
return true, nil
}
func gcsDirectPublicUrl(ctx appengine.Context, bucket string, filename string) string {
if appengine.IsDevAppServer() {
// When running on devappserver, GCS files are stored locally in the blobstore
gcsPath := gcsFilesApiPath(bucket, filename)
blobKey, err := blobstore.BlobKeyForFile(ctx, gcsPath)
if err != nil {
panic(err)
}
return "http://localhost:8000/blobstore/blob/" + string(blobKey) + "?display=inline"
}
return "https://storage.googleapis.com/" + bucket + "/" + filename
}
// GCSに保存された画像の公開URLを取得します。
func GetServingURL(c appengine.Context, filename string) (servingURL *url.URL, err error) {
blobKey, err := blobstore.BlobKeyForFile(c, filename)
if err != nil {
c.Errorf("serve.go:14: %s", err.Error())
return nil, err
}
opts := &image.ServingURLOptions{Secure: true}
servingURL, err = image.ServingURL(c, blobKey, opts)
if err != nil {
c.Errorf("serve.go:25: %s", err.Error())
return nil, err
}
return servingURL, nil
}
// Get the image link for an object.
func api_imageLinkObject(w http.ResponseWriter, r *http.Request) {
// We use the blob store + images to generate a serving url for the file
c := appengine.NewContext(r)
vars := mux.Vars(r)
bk, err := blobstore.BlobKeyForFile(c, "/gs/"+bucketName+"/"+vars["key"])
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
if imageUrl, err := image.ServingURL(c, bk, nil); err == nil {
fmt.Fprint(w, imageUrl)
} else {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
}
func jobOutputHandler(w http.ResponseWriter, r *http.Request) {
path := r.URL.Path
jobID := path[12:]
c := appengine.NewContext(r)
state := &job.State{ID: jobID}
if err := datastore.Get(c, state.GetKey(c), state); err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
}
if state.OutputData == "" {
http.Error(w, "No processing output", http.StatusBadRequest)
}
blobKey, err := blobstore.BlobKeyForFile(c, state.OutputData)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
}
w.Header().Set("Cache-Control", "public,max-age:60000")
blobstore.Send(w, blobKey)
}
func renameOrDelete(c appengine.Context, w http.ResponseWriter, r *http.Request) {
b1 := new(bytes.Buffer)
s1 := ""
defer func() {
w.Header().Set("Content-type", "text/html; charset=utf-8")
w.Write(b1.Bytes())
}()
// c := appengine.NewContext(r)
bk := r.FormValue("blobkey")
if bk == "" {
b1.WriteString("No blob key given<br>")
return
} else {
s1 = fmt.Sprintf("Blob key given %q<br>", bk)
b1.WriteString(s1)
}
dsKey := datastore.NewKey(c, "__BlobInfo__", bk, 0, nil)
q := datastore.NewQuery("__BlobInfo__").Filter("__key__=", dsKey)
var bi BlobInfo
var found bool
for t := q.Run(c); ; {
_, err := t.Next(&bi)
if err == datastore.Done {
c.Infof(" No Results (any more), blob-rename-delete %v", err)
break
}
// other err
if err != nil {
util_err.Err_log(err)
return
}
found = true
break
}
if found {
ac := r.FormValue("action")
if ac == "delete" {
b1.WriteString("deletion ")
// first the binary data
keyBlob, err := blobstore.BlobKeyForFile(c, bi.Filename)
util_err.Err_log(err)
if err != nil {
b1.WriteString(fmt.Sprintf(" ... failed (1) %v", err))
} else {
err = blobstore.Delete(c, keyBlob)
util_err.Err_log(err)
if err != nil {
b1.WriteString(fmt.Sprintf(" ... failed (2) %v<br>", err))
} else {
// now the datastore record
err = datastore.Delete(c, dsKey)
util_err.Err_log(err)
if err != nil {
b1.WriteString(fmt.Sprintf(" ... failed (3) %v<br>%#v<br>", err, dsKey))
} else {
b1.WriteString(" ... succeeded<br>")
}
}
}
}
if ac == "rename" {
b1.WriteString("renaming ")
nfn := r.FormValue("filename")
if nfn == "" || len(nfn) < 4 {
b1.WriteString(" ... failed - at LEAST 4 chars required<br>")
return
}
nfn = strings.ToLower(nfn)
bi.Filename = nfn
_, err := datastore.Put(c, dsKey, &bi)
util_err.Err_log(err)
if err != nil {
b1.WriteString(fmt.Sprintf(" ... failed. %v", err))
} else {
b1.WriteString(" ... succeeded<br>")
}
}
} else {
b1.WriteString("no blob found for given blobkey<br>")
}
b1.WriteString("<a href='/blob2'>Back to list</a><br>")
}
func handleUploadImage(c appengine.Context, w http.ResponseWriter, r *http.Request) {
file, fileHeader, err := r.FormFile(uploadImageKey)
if err != nil {
c.Infof("Failed to get uploaded image: %v", err)
http.Error(w, "Failed to get uploaded image", http.StatusBadRequest)
return
}
defer file.Close()
data, err := ioutil.ReadAll(file)
if err != nil {
c.Errorf("Failed to read uploaded image: %v", err)
http.Error(w, "Failed to get uploaded image", http.StatusBadRequest)
return
}
ext := path.Ext(fileHeader.Filename)
mimeType := mime.TypeByExtension(ext)
// create context for Google Cloud Storage and upload file
gc := gappengine.NewContext(r)
hc := &http.Client{
Transport: &oauth2.Transport{
Source: google.AppEngineTokenSource(gc, storage.ScopeFullControl),
Base: &urlfetch.Transport{Context: gc},
},
}
ctx := cloud.NewContext(gappengine.AppID(gc), hc)
c.Infof("Demo GCS Application running from Version: %v\n", appengine.VersionID(c))
filePath := path.Join(tempImagePath, createTempImagePath, fileHeader.Filename)
c.Infof("file: %v, size: %d, MIME: %v, path: %v", fileHeader.Filename, len(data), mimeType, filePath)
wc := storage.NewWriter(ctx, bucketName, filePath)
wc.ContentType = mimeType
_, err = wc.Write(data)
if err != nil {
c.Errorf("Failed to upload image: %v", err)
http.Error(w, "Failed to upload image", http.StatusInternalServerError)
return
}
err = wc.Close()
if err != nil {
c.Errorf("Failed to close uploaded image: %v", err)
http.Error(w, "Failed to upload image", http.StatusInternalServerError)
return
}
obj, err := storage.StatObject(ctx, bucketName, filePath)
if err != nil {
c.Errorf("Failed to stat object: %v", err)
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
// c.Infof("obj: %v", obj)
// get blob key for GCS file
// obj := wc.Object()
objName := path.Join("/gs", bucketName, obj.Name)
c.Infof("Getting blob key from path: %v", objName)
imgKey, err := blobstore.BlobKeyForFile(c, objName)
if err != nil {
c.Errorf("Failed to get image blob key: %v", err)
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
url, err := getImageUrl(c, imgKey)
if err != nil {
c.Errorf("Failed to get room image url: %v", err)
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
info := ImageInfo{
Key: imgKey,
Url: url.String(),
}
outBuf, err := json.Marshal(&info)
if err != nil {
c.Errorf("%s", err)
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
w.Header().Set("Content-Type", "application/json")
_, err = w.Write(outBuf)
if err != nil {
c.Errorf("%s", err)
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
}