AppEngine BlobStore 上传失败，请求在开发环境中有效 [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，它工作正常.当我尝试从 Android 应用程序上传图像时，它失败了.如果我在开发服务器上运行，两种方法都可以正常工作，但 Android 上传不适用于实时服务.
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.
这是来自 Chrome 的请求:
This is the request from Chrome:
<代码> POST/_ah/上传/?userToken = 11001/AMmfu6ZCyMQQ9YdiXal3SmSXIRTQIuSRXkNc-i3JmU0fqx_kJbUJ2OMLcS2lXhVJSK4qs7regViTKzOPz5ejoZYi0nAD5o8vNltiOViQw6DZO7_byZz3Ut0/ALBNUaYAAAAAS_lusgPMAGmpPrg0BuNsJyymX-57ob4i/HTTP/1.1主持人:photohuntservice.appspot.com连接:保持连接用户代理: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推荐人:http://photohuntservice.appspot.com/debug_newpuzzle?userToken=11001内容长度:60360缓存控制:max-age=0来源:http://photohuntservice.appspot.com内容类型:多部分/表单数据；边界=----WebKitFormBoundarybl05YLmLbFRf2MzN接受:application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5接受编码:gzip、deflate、sdch接受语言:en-US,en;q=0.8接受字符集:ISO-8859-1,utf-8;q=0.7,*;q=0.3------WebKitFormBoundarybl05YLmLbFRf2MzN内容配置:表单数据；名称=用户令牌"11001------WebKitFormBoundarybl05YLmLbFRf2MzN内容配置:表单数据；名称="img";文件名="照片_020908_001.jpg"内容类型:图像/jpeg<图像数据>------WebKitFormBoundarybl05YLmLbFRf2MzN内容配置:表单数据；名称=经度"-122.084095------WebKitFormBoundarybl05YLmLbFRf2MzN内容配置:表单数据；名称=纬度"37.422006------WebKitFormBoundarybl05YLmLbFRf2MzN--
这是来自我的客户的请求(在 Android 上用 Java 编写，但我认为这不相关):
This is the request from my client (which is written in Java on Android, but I don't think that's relevant):
<代码> POST/_ah/上传/?userToken = 11001/AMmfu6Zf9an6AU4lT9UuhIpxOZyOYb1LMwimFpeSh8zr6J1sX9F2ddJW3Qlsw0kwV3oALv-TNPWRQ6g4_Dgwk0UTwF47bbc78Yl44kDeV69MydTuR3N46S4/ALBNUaYAAAAAS_mMr3CYqTg3aVBDjhRxP0DyyRdvotyG/HTTP/1.1内容类型:multipart/form-data;boundary=----WebKitFormBoundaryhdyNAhmOouRDGErG缓存控制:max-age=0接受: */*来源:http://photohuntservice.appspot.com连接:保持连接推荐人:http://photohuntservice.appspot.com/getuploadurl?userToken=11001内容长度:2638主持人:photohuntservice.appspot.com用户代理:Apache-HttpClient/UNAVAILABLE (java 1.4)期望:100-继续------WebKitFormBoundaryhdyNAhmOourDGERG内容配置:表单数据；名称=用户令牌"11001------WebKitFormBoundaryhdyNAhmOourDGERG内容配置:表单数据；name="img";filename="PhotoHunt.jpg"内容类型:图像/jpeg<图像数据>------WebKitFormBoundaryhdyNAhmOourDGERG内容配置:表单数据；名称=纬度"37.422006------WebKitFormBoundaryhdyNAhmOourDGERG内容配置:表单数据；名称=经度"-122.084095------WebKitFormBoundaryhdyNAhmOouRDGErG--
在这两种情况下，用于捕获请求的 AppEngine Python 代码是相同的:
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( )
问题是，在生产 AppEngine 服务上运行时，self.get_uploads() 会在从我的客户端应用程序发出请求时返回一个空列表.这两个请求都在开发服务器上返回我期望的内容(其中包含一个 blob_info 的列表)，Chrome 在这两种情况下都返回我期望的内容.
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.
推荐答案
原来问题出在这一行:
Content-Disposition: form-data; name="img";filename="PhotoHunt.jpg"
它应该是这样的:
Content-Disposition: form-data; name="img"; filename="PhotoHunt.jpg"
生产服务器上的表单数据解析器比开发环境中的解析器更严格，分号和文件名="之间需要一个空格
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="
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