python - urllib2 没有检索整个 HTTP 响应

Question

我很困惑为什么我不能从 FriendFeed 下载一些 JSON 响应的全部内容。使用 urllib2 .

>>> 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式:

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() 不能保证返回整个响应，鉴于套接字的性质。我认为这已在文档(可能是 urllib)中进行了讨论，但我找不到它。