GAE Blobstore问题 - 在Internet Explorer 8下载失败 [英] GAE Blobstore issue - download fails in internet explorer 8

问题描述

我有一个使用send_blob函数向Internet Explorer提供文件的问题。文件从0.5Mb到5Mb很小。所有在Firefox和Chrome中运行良好，但在IE 8.0中，我得到下载进度窗口，并在几秒钟后出现错误：

无法从[域名在这里]

无法打开这个互联网网站，请求的网站不可用或无法找到，请稍后重试

解决方案

当尝试通过HTTPS下载二进制文件时，此问题是由IE中的错误引起的。该错误与HTTP响应中的Cache-Control标头相关。

在这里您可以找到更多信息：

http://support.microsoft.com/kb/323308

只需使用HTTP而不是HTTPS或通过将处理程序中的Cache-Control设置为与no-cache不同的方式，就可以解决问题。以下代码适用于我：

  class下载（blobstore_handlers.BlobstoreDownloadHandler）：
 
 def get self）：
 
 blob = self.request.get（'blob_key'）
 self.response.headers ['Cache-control'] ='max-age = 0'
 self.send_blob（blob）
  

I have an issue with serving files to internet explorer using send_blob function. Files are quite small from 0.5Mb to 5Mb. All works fine in Firefox and Chrome, but in IE 8.0 I get download progress window and after couple of seconds error:

"Unable to download [blob key here] from [domain name here]

Unable to open this Internet site. The requested site is either unavailable or cannot be found. Please try again later"

解决方案

This issue is caused by a bug in IE when trying to download binary files over HTTPS. The bug is related to the Cache-Control header in the HTTP response.

Here you can find more information:

http://support.microsoft.com/kb/323308

http://trac.edgewall.org/ticket/9584

The problem can be solved simply by using HTTP instead of HTTPS or by setting the Cache-Control in your handler to something different than 'no-cache'. The following code worked for me:

class Download(blobstore_handlers.BlobstoreDownloadHandler):   

  def get(self):

    blob = self.request.get('blob_key')
    self.response.headers['Cache-control'] = 'max-age=0'
    self.send_blob(blob)

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