如何将Web图像保存到App Engine的blobstore？ [英] How do I save web images to App Engine's blobstore?

问题描述

我用这个问题作为解决相同问题的模板，但发布时遇到问题。我有这些组件：

1. HTML 表格，图片网址带有文本框。此帖发布到...


2. 一个处理程序，它接受发布的URL，对其进行编码并使用 urlfetch 将其重新发布到...


3. 实际保存的单独的文件上传处理程序。

如果我使用文件输入，组件＃3可以很好地工作。但我不太明白如何从图片网址获得 urlfetch 所需的内容。我的流程要么超时，要么得到最终处理程序的500响应。

 ＃1 
 class URLMainHandler（RequestHandler）：
 def get（self）：
返回render_response（'blob / upload_url.html'，
 upload_url = url_for（'blobstore / upload / url'））
＃2 $ b $ class URLUploadHandler（RequestHandler）：
 def post （self）：
导入urllib 
＃获取发布的图片URL。 
 data = urllib.urlencode（{'file'：self.request.form.get（'file'）}）
＃通过在文件上传处理程序上调用POST将图像发布到blobstore。 
 result = urlfetch.fetch（url = blobstore.create_upload_url（url_for（'blobstore / upload'）），
 payload = data，
 method = urlfetch.POST）
 
 return self.redirect（url_for（'blobstore / url'），result.status_code）
 
＃3 
 class UploadHandler（RequestHandler，BlobstoreUploadMixin）：
 def post（self ）：
＃'file'是表单中文件上传字段的名称。 
 upload_files = self.get_uploads（'file'）
 blob_info = upload_files [0] 
 response = redirect_to（'blobstore / serve'，resource = blob_info.key（））
 ＃清除响应主体。 
 response.data =''
返回响应
  

同样，这是我关注的过程。感谢您的帮助！

解决方案

不使用blobstore api就可以实现同样的功能。我认为你必须得到url并使用urlfetch（）。content方法获取内容并将其存储为blob属性。

  url =imageurl
 result = urlfetch.fetch（url）
 if result.status_code == 200：
 prof.avatar = db.Blob（result.content）
  

有关将数据存储区中的图像存储并提供为blob的更多参考信息。

你可以在 store-images-in-datastore

I've used this question as a template to solve the same problem, but I'm running into issues when posting. I have these components:

1. HTML form with a textbox for the image URL. This posts to...
2. A handler that takes the posted URL, encodes it, and uses urlfetch to post it again to...
3. A separate file upload handler that does the actual saving.

Component #3 works fine by itself if I use a file input. But I don't quite understand how to get urlfetch what it needs from just the image URL. My process either times out or gets a 500 response from the final handler.

# 1
class URLMainHandler(RequestHandler):
    def get(self):
        return render_response('blob/upload_url.html', 
                               upload_url=url_for('blobstore/upload/url'))
# 2        
class URLUploadHandler(RequestHandler):
    def post(self):
        import urllib
        # Get the posted image URL. 
        data = urllib.urlencode({'file': self.request.form.get('file')})
        # Post image to blobstore by calling POST on the file upload handler. 
        result = urlfetch.fetch(url=blobstore.create_upload_url(url_for('blobstore/upload')),
                                payload=data, 
                                method=urlfetch.POST)

        return self.redirect(url_for('blobstore/url'), result.status_code)

# 3
class UploadHandler(RequestHandler, BlobstoreUploadMixin):
    def post(self):
        # 'file' is the name of the file upload field in the form.
        upload_files = self.get_uploads('file')
        blob_info = upload_files[0]
        response = redirect_to('blobstore/serve', resource=blob_info.key())
        # Clear the response body.
        response.data = ''
        return response

Again, this is the process I'm following. Thanks for your help!

解决方案

You can achieve the same without using blobstore api. I think you have to just get the url and get the content using urlfetch().content method and store it as a blob property.

url = "imageurl"
result = urlfetch.fetch(url)
if result.status_code == 200:
   prof.avatar = db.Blob(result.content)

For further reference in storing and serving images from datastore as blob.

You can see this post for more on store-images-in-datastore

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