將圖片從iPhone上傳到GAE blobstore

Question

我今天早上花了一整天的時間尋找一個清晰的例子，說明如何將使用iPhone拍攝的照片上傳到blobstore，但沒有成功。

目前，我有我的iPhone應用程序開發的，它可以在服務器發送圖片到PHP服務器，使用此代碼：

// Function to upload a photo in a file and save data in the DB 
function upload($photoData, $descr, $phone) { 
    // Folder to upload data 
    $path = $_SERVER['DOCUMENT_ROOT']."/program/data/"; 

    // Check if there was no error during the file upload 
    if ($photoData['error'] == 0) { 
     $result = query("INSERT INTO pics(descr, phone) VALUES('%s','%s')", $descr, $phone); 
     if (!$result['error']) { 
      // Inserted in the database, go on with file storage 
      // Obtain database link (in lib.php) 
      global $link; 

      // Get the last automatically generated ID 
      $idPhoto = mysqli_insert_id($link); 

      // Move the temporarily stored file to a convenient location 
      if (move_uploaded_file($photoData['tmp_name'], $path.$idPhoto.".jpg")) { 
       // File moved, all good, generate thumbnail 
       thumb($path.$idPhoto.".jpg", 180); 
       print json_encode(array('successful' => 1)); 
      } else { 
       errorJson('Upload on server problem'); 
      } 
     } else { 
      errorJson('Save database problem: '.$result['error']); 
     } 
    } else { 
     errorJson('Upload malfunction.'); 
    } 
} 

，使得在Objective-C的部分這個作品是（I」中號使用AFNetworking和對象API sharedInstance是AFJSONRequestOperation類）：

// Upload the image and the description to the web service 
[[API sharedInstance] commandWithParams:[NSMutableDictionary dictionaryWithObjectsAndKeys: 
              @"upload", @"command", 
              UIImageJPEGRepresentation(originalPhoto, 70), @"file", 
              description, @"descr", 
              phoneNumber, @"phone", 
              nil] 
           onCompletion:^(NSDictionary *json) { 
            // Finished and response from server 
            if (![json objectForKey:@"error"]) { 
             // Success 
             [[[UIAlertView alloc]initWithTitle:@"Info" 
                    message:@"Thanks" 
                   delegate:nil 
                 cancelButtonTitle:@"Dismiss" 
                 otherButtonTitles: nil] show]; 

             // Send a notification so the main view can reload the data 
             [[NSNotificationCenter defaultCenter] postNotificationName:@"updateStream" object:nil]; 
            } else { 
             // Error 
             NSString* errorMsg = [json objectForKey:@"error"]; 
             [UIAlertView error:errorMsg]; 
            } 
           }]; 

這工作正常並且圖像被保存在服務器上。但是我想要對無法保存文件的數據存儲進行同樣的處理。所以我建立了一個網頁來練習保存圖像，並且我可以從標準的網頁表單上在沒有任何問題的情況下上傳圖像。這是我使用它保存在GAE的代碼（忘了我自己的助手類或函數像PicturePageHandler或render_page）：

# Get and post for the create page 
class Create(PicturePageHandler, blobstore_handlers.BlobstoreUploadHandler): 
    def get(self): 
     if self.user_logged_in(): 
      # The session for upload a file must be new every reload page 
      uploadUrl = blobstore.create_upload_url('/addPic') 
      self.render_page("addPicture.htm", form_action=uploadUrl) 

    def post(self): 
     if self.user_logged_in(): 
      # Create a dictionary with the values, we will need in case of error 
      templateValues = self.template_from_request() 
      # Test if all data form is valid 
      testErrors = check_fields(self) 

      if testErrors[0]: 
       # No errors, save the object 
       try: 
        # Get the file and upload it 
        uploadFiles = self.get_uploads('picture') 
        # Get the key returned from blobstore, for the first element 
        blobInfo = uploadFiles[0] 
        # Add the key and the permanent url to the template 
        templateValues['blobKey'] = blobInfo.key() 
        templateValues['servingUrl'] = images.get_serving_url(blobInfo.key(), size=None) 

        # Save all 
        pic = Picture.save(self.user.key, **templateValues) 
        if pic is None: 
         logging.error('Picture save error.') 

        self.redirect("/myPics") 

       except: 
        self.render_page("customMessage.htm", custom_msg=_("Problems while uploading the picture.")) 
      else: 
       # Errors, render the page again, with the values, and showing the errors 
       templateValues = custom.prepare_errors(templateValues, testErrors[1]) 
       # The session for upload a file must be new every reload page 
       templateValues['form_action'] = blobstore.create_upload_url('/addPic') 

       self.render_page("addPicture.htm", **templateValues) 

我的問題是：

1. 我還可以用我的Objective-C JSON調用將圖片上傳到服務器，或者我必須徹底改變上傳圖片的方式嗎？
2. 如果可能，我如何更改Python服務器代碼以從JSON獲取圖片？

Answer 1

這不正是你以後，但是這可能幫助：

http://brunofuster.wordpress.com/2011/03/11/uploading-an-image-from-iphone-to-appengine-blobstore-using-vraptor/