urllib2无法检索整个HTTP响应

Question

对于为什么我无法使用urllib2从FriendFeed下载一些JSON响应的全部内容，我感到困惑。

>>> import urllib2
>>> stream = urllib2.urlopen('http://friendfeed.com/api/room/the-life-scientists/profile?format=json')
>>> stream.headers['content-length']
'168928'
>>> data = stream.read()
>>> len(data)
61058
>>> # We can see here that I did not retrieve the full JSON
... # given that the stream doesn't end with a closing }
... 
>>> data[-40:]
'ce2-003048343a40","name":"Vincent Racani'

如何使用urllib2检索完整响应？

Answer 1

获取所有数据的最佳方法：

fp = urllib2.urlopen("http://www.example.com/index.cfm")

response = ""
while 1:
    data = fp.read()
    if not data:         # This might need to be    if data == "":   -- can't remember
        break
    response += data

print response

原因是.read()考虑到套接字的性质，不能保证返回整个响应。我以为是在文档中讨论过的（也许是urllib），但找不到。