python urllib2的301/302重定向处理
用惯了requests，python的标准库倒是很久不碰。以致这次用urllib2稍微折腾了下。记得301/302是自动跳转的,结果我这直接异常,参考这里,简单重新实现了下重定向，结果仍然杯具。只能追源码：
def redirect_request(self, req, fp, code, msg, headers, newurl):
m = req.get_method()
if (code in (301, 302, 303, 307) and m in ("GET", "HEAD")
or code in (301, 302, 303) and m == "POST"):
# Strictly (according to RFC 2616), 301 or 302 in response
# to a POST MUST NOT cause a redirection without confirmation
# from the user (of urllib2, in this case).In practice,
# essentially all clients do redirect in this case, so we
# do the same.
# be conciliant with URIs containing a space
newurl = newurl.replace(' ', '%20')
newheaders = dict((k,v) for k,v in req.headers.items()
if k.lower() not in ("content-length", "content-type")
)
return Request(newurl,
headers=newheaders,
origin_req_host=req.get_origin_req_host(),
unverifiable=True)
else:
raise HTTPError(req.get_full_url(), code, msg, headers, fp)
感情是只支持post/get/head 方法，咱这用了put,额...（怎么用put,参看这里）
只能把redirect_request一起覆盖了，什么put/delete统统加上，齐活～
另，才发现python2.6+的版本,urlopen竟然已支持timeout传参，幸而一直用的requests,才没有傻兮兮的一路setdefault
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