def redirect_request(self, req, fp, code, msg, headers, newurl):
"""Return a Request or None in response to a redirect.
This is called by the http_error_30x methods when a
redirection response is received. If a redirection should
take place, return a new Request to allow http_error_30x to
perform the redirect. Otherwise, raise HTTPError if no-one
else should try to handle this url. Return None if you can't
but another Handler might.
"""
m = req.get_method()
if (code in (301, 302, 303, 307, "refresh") and m in ("GET", "HEAD")
or code in (301, 302, 303, "refresh") 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.
# TODO: really refresh redirections should be visiting; tricky to fix
new = _request.Request(
newurl,
headers=req.headers,
origin_req_host=req.get_origin_req_host(),
unverifiable=True,
visit=False,
timeout=req.timeout)
new._origin_req = getattr(req, "_origin_req", req)
return new
else:
raise HTTPError(req.get_full_url(), code, msg, headers, fp)
def visit_response(self, response, request=None):
"""Visit the response, as if it had been .open()ed.
Unlike .set_response(), this updates history rather than replacing the
current response.
"""
if request is None:
request = _request.Request(response.geturl())
self._visit_request(request, True)
self._set_response(response, False)
