GAE上的HTTP错误302

Question

我编写了一个脚本，用于自动从rss向社交网络发布状态。对于发布我只使用urllib和urllib2，如果我从命令行运行我的脚本 - 它是有效的。但是当我将它上传到GAE服务器并转到它的网址时，我有：HTTP Error 302: The HTTP server returned a redirect error that would lead to an infinite loop.

那么这里的问题是什么？为什么跑步的结果不同？

代码现在是这样的：

def get_page(url, post = None, cookies = None, referer = None):
    if post != None:
        post = urllib.urlencode(post)

    opener = urllib2.build_opener()

    request = urllib2.Request(url, post)
    if referer != None:
        request.add_header('Referer', referer)
    request.add_header('User-Agent', 'Chrome/12.0.742.112')
    if cookies != None:
        request.add_header('Cookie', cookies)

    try:
        handle = opener.open(request)
    except URLError, details:
        print 'URL error: ', details
        return ''
    data = handle.read()
    handle.close()

    return data