如何将图片从url上传到Blobstore？

问题描述

| 如果blobstore blob，则Google App Engine文件API现在支持以编程方式创建。 我通过尝试通过http提取图像并将其存储到blobstore来解决此问题：

    file_name = files.blobstore.create(mime_type=\'image/jpeg\')
    image = urllib2.urlopen(url)
    with files.open(file_name,\'a\') as f:
        f.write(image)  # LINE 142

    files.finalize(file_name)   
    blob_key = files.blobstore.get_blob_key(file_name) 

这段代码抛出错误：

  File \"/Users/willmerydith/repos/spam/admin.py\",line 142,in post
    f.write(image)
  File \"/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/api/files/file.py\",line 364,in write
    self._make_rpc_call_with_retry(\'Append\',request,response)
  File \"/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/api/files/file.py\",line 472,in _make_rpc_call_with_retry
    _make_call(method,line 229,in _make_call
    rpc.check_success()
  File \"/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/api/apiproxy_stub_map.py\",line 558,in check_success
    self.__rpc.CheckSuccess()
  File \"/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/api/apiproxy_rpc.py\",line 156,in _WaitImpl
    self.request,self.response)
  File \"/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/api/apiproxy_stub.py\",line 80,in MakeSyncCall
    if request.ByteSize() > self.__max_request_size:
  File \"/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/api/files/file_service_pb.py\",line 1923,in ByteSize
    n += self.lengthString(len(self.data_))
AttributeError: addinfourl instance has no attribute \'__len__\'

我怀疑它正在破裂，因为我超出了尺寸限制。那是由于我将图像写入Blobstore的方式吗？ Blobstore的大小限制为2 GB，我正在测试的图像小于200-300 KB。     

解决方法

urllib2.urlopen

返回

urllib2.addinourl

对象，而不是字符串。您不能将此对象直接写入文件对象。 在第142行尝试

f.write(image.read())

。     ,由于档案API已于2015年9月停用，因此无法再使用。