AppEngine BlobStore上传失败，请求在开发环境中运行 [英] AppEngine BlobStore upload failing with a request that works in the Development Environment

问题描述

我有一个AppEngine应用程序，它使用blobstore来存储用户提供的图像数据。当我从Chrome中的表单将图像上传到该应用程序时，它可以正常工作。当我尝试从Android应用上传图片时，它失败了。这两种方法工作正常，如果我对开发服务器运行，但Android上载不起作用对现场服务。

这是来自Chrome的请求：

p>

  POST / _ah /上传/ userToken = 11001 / AMmfu6ZCyMQQ9YdiXal3SmSXIRTQIuSRXkNc-i3JmU0fqx_kJbUJ2OMLcS2lXhVJSK4qs7regViTKzOPz5ejoZYi0nAD5o8vNltiOViQw6DZO7_byZz3Ut0 / ALBNUaYAAAAAS_lusgPMAGmpPrg0BuNsJyymX-57ob4i / HTTP / 1.1 
主机？： photohuntservice.appspot.com 
连接：keep-alive 
用户代理：Mozilla / 5.0（Windows; U; Windows NT 6.0; en-US）AppleWebKit / 532.5（KHTML，如Gecko）Chrome / 4.1 .249.1064 Safari / 532.5 
 Referer：http://photohuntservice.appspot.com/debug_newpuzzle?userToken=11001 
 Content-Length：60360 
 Cache-Control：max-age = 0 
 Origin：http://photohuntservice.appspot.com 
 Content-Type：multipart / form-data; border = ---- WebKitFormBoundarybl05YLmLbFRf2MzN 
 Accept：application / xml，application / xhtml + xml，text / html; q = 0.9，text / plain; q = 0.8，image / png，* / *; q = 0.5 
 Accept-Encoding：gzip，deflate，sdch 
 Accept-Language：en-US，en; q = 0.8 
 Accept-Charset：ISO-8859-1，utf-8; q = 0.7，*; q = 0.3 
 
 ------ WebKitFormBoundarybl05YLmLbFRf2MzN 
 Content-Disposition：form-data; name =userToken
 
 11001 
 ------ WebKitFormBoundarybl05YLmLbFRf2MzN 
 Content-Disposition：form-data; NAME = IMG;文件名=Photo_020908_001.jpg
内容类型：image / jpeg 
 
<图片数据> 
 ------ WebKitFormBoundarybl05YLmLbFRf2MzN 
 Content-Disposition：form-data; name =longitude
 
 -122.084095 
 ------ WebKitFormBoundarybl05YLmLbFRf2MzN 
 Content-Disposition：form-data; name =latitude
 
 37.422006 
 ------ WebKitFormBoundarybl05YLmLbFRf2MzN-- 
  

这是我的客户的请求（在Android上用Java编写的，但我认为这没什么关系）：

 <？code> POST / _ah /上传/ userToken = 11001 / AMmfu6Zf9an6AU4lT9UuhIpxOZyOYb1LMwimFpeSh8zr6J1sX9F2ddJW3Qlsw0kwV3oALv-TNPWRQ6g4_Dgwk0UTwF47bbc78Yl44kDeV69MydTuR3N46S4 / ALBNUaYAAAAAS_mMr3CYqTg3aVBDjhRxP0DyyRdvotyG / HTTP / 1.1 
内容类型：多部分/格式数据;边界= ---- WebKitFormBoundaryhdyNAhmOouRDGErG 
缓存控制：max-age = 0 
接受：* / * 
原点：http://photohuntservice.appspot.com 
连接：keep-alive 
 Referer：http ：//photohuntservice.appspot.com/getuploadurl？userToken = 11001 
 Content-Length：2638 
 Host：photohuntservice.appspot.com 
 User-Agent：Apache-HttpClient / UNAVAILABLE（java 1.4 ）
期望：100-继续
 
 ------ WebKitFormBoundaryhdyNAhmOouRDGErG 
内容处理：form-data; name =userToken
 
 11001 
 ------ WebKitFormBoundaryhdyNAhmOouRDGErG 
 Content-Disposition：form-data; name =img; filename =PhotoHunt.jpg
 Content-Type：image / jpeg 
 
< image data> 
 ------ WebKitFormBoundaryhdyNAhmOouRDGErG 
内容处理：form-data; name =latitude
 
 37.422006 
 ------ WebKitFormBoundaryhdyNAhmOouRDGErG 
内容处理：form-data; name =longitude
 
 -122.084095 
 ------ WebKitFormBoundaryhdyNAhmOouRDGErG-- 
  

在这两种情况下，用于捕获请求的AppEngine Python代码都是相同的：

  class UploadPuzzle（blobstore_handlers .BlobstoreUploadHandler）：
 def post（self）：
 upload_files = self.get_uploads（）
  

问题是，在生产AppEngine服务上运行时，self.get_uploads（）从客户端应用程序发出请求时返回空列表。这两个请求都会在开发服务器上返回我期望的内容（包含一个blob_info的列表），并且Chrome会在两种情况下返回所期望的内容。 解决方案发现问题是这样的：

  Content-Disposition：form-data; name =img; filename =PhotoHunt.jpg
  

它应该像这样读取： p>

  Content-Disposition：form-data; NAME = IMG; filename =PhotoHunt.jpg
  

生产服务器上form-data的解析器比在开发环境中，并且需要分号和filename =之间有一个空格

I have an AppEngine application that uses the blobstore to store user-provided image data. When I upload images to that application from a form in Chrome it works fine. When I try to upload an image from an Android application it fails. Both methods work fine if I am running against the development server, but the Android upload doesn't work against the live service.

This is the request from Chrome:

POST /_ah/upload/?userToken=11001/AMmfu6ZCyMQQ9YdiXal3SmSXIRTQIuSRXkNc-i3JmU0fqx_kJbUJ2OMLcS2lXhVJSK4qs7regViTKzOPz5ejoZYi0nAD5o8vNltiOViQw6DZO7_byZz3Ut0/ALBNUaYAAAAAS_lusgPMAGmpPrg0BuNsJyymX-57ob4i/ HTTP/1.1
Host: photohuntservice.appspot.com
Connection: keep-alive
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US) AppleWebKit/532.5 (KHTML, like Gecko) Chrome/4.1.249.1064 Safari/532.5
Referer: http://photohuntservice.appspot.com/debug_newpuzzle?userToken=11001
Content-Length: 60360
Cache-Control: max-age=0
Origin: http://photohuntservice.appspot.com
Content-Type: multipart/form-data; boundary=----WebKitFormBoundarybl05YLmLbFRf2MzN
Accept: application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5
Accept-Encoding: gzip,deflate,sdch
Accept-Language: en-US,en;q=0.8
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3

------WebKitFormBoundarybl05YLmLbFRf2MzN
Content-Disposition: form-data; name="userToken"

11001
------WebKitFormBoundarybl05YLmLbFRf2MzN
Content-Disposition: form-data; name="img"; filename="Photo_020908_001.jpg"
Content-Type: image/jpeg

<image data>
------WebKitFormBoundarybl05YLmLbFRf2MzN
Content-Disposition: form-data; name="longitude"

-122.084095
------WebKitFormBoundarybl05YLmLbFRf2MzN
Content-Disposition: form-data; name="latitude"

37.422006
------WebKitFormBoundarybl05YLmLbFRf2MzN--

This is the request from my client (which is written in Java on Android, but I don't think that's relevant):

POST /_ah/upload/?userToken=11001/AMmfu6Zf9an6AU4lT9UuhIpxOZyOYb1LMwimFpeSh8zr6J1sX9F2ddJW3Qlsw0kwV3oALv-TNPWRQ6g4_Dgwk0UTwF47bbc78Yl44kDeV69MydTuR3N46S4/ALBNUaYAAAAAS_mMr3CYqTg3aVBDjhRxP0DyyRdvotyG/ HTTP/1.1
Content-Type: multipart/form-data;boundary=----WebKitFormBoundaryhdyNAhmOouRDGErG
Cache-Control: max-age=0
Accept: */*
Origin: http://photohuntservice.appspot.com
Connection: keep-alive
Referer: http://photohuntservice.appspot.com/getuploadurl?userToken=11001
Content-Length: 2638
Host: photohuntservice.appspot.com
User-Agent: Apache-HttpClient/UNAVAILABLE (java 1.4)
Expect: 100-Continue

------WebKitFormBoundaryhdyNAhmOouRDGErG
Content-Disposition: form-data; name="userToken"

11001
------WebKitFormBoundaryhdyNAhmOouRDGErG
Content-Disposition: form-data; name="img";filename="PhotoHunt.jpg"
Content-Type: image/jpeg

<image data>
------WebKitFormBoundaryhdyNAhmOouRDGErG
Content-Disposition: form-data; name="latitude"

37.422006
------WebKitFormBoundaryhdyNAhmOouRDGErG
Content-Disposition: form-data; name="longitude"

-122.084095
------WebKitFormBoundaryhdyNAhmOouRDGErG--

In both cases the AppEngine Python code to catch the request is the same:

  class UploadPuzzle( blobstore_handlers.BlobstoreUploadHandler ):
        def post(self):
            upload_files = self.get_uploads(  )

The problem is that when running on the production AppEngine service self.get_uploads() returns an empty list when the request is made from my client app. Both requests return what I expect (a list with one blob_info in it) on the development server, and Chrome returns what I expect in both cases.

解决方案

Turns out the problem was this line:

Content-Disposition: form-data; name="img";filename="PhotoHunt.jpg"

It should read like this:

Content-Disposition: form-data; name="img"; filename="PhotoHunt.jpg"

The parser for form-data on the production servers is more strict than the one in the development environment and requires a space between the semicolon and "filename="

这篇关于AppEngine BlobStore上传失败，请求在开发环境中运行的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！