python urlopen 不了一个url 而用curl 是可以的

url=“http://redirect.viglink.com?key=4f41d321ffc89f8abfd39904671d7ab7&u=http%3A%2F%2Fwww.newegg.com%2FProduct%2FProduct.aspx%3Fnm_mc%3DAFC-dealmoon%26cm_mmc%3DAFC-dealmoon-_-NA-_-NA-_-NA%26Item%3DN82E16820147192”
import urllib2
next_url=urllib2.urlopen(url).geturl()
print next_url
Traceback (most recent call last):
  File "", line 1, in 
  File "/usr/lib64/python2.6/urllib2.py", line 126, in urlopen
    return _opener.open(url, data, timeout)
  File "/usr/lib64/python2.6/urllib2.py", line 397, in open
    response = meth(req, response)
  File "/usr/lib64/python2.6/urllib2.py", line 510, in http_response
    'http', request, response, code, msg, hdrs)
  File "/usr/lib64/python2.6/urllib2.py", line 435, in error
    return self._call_chain(*args)
  File "/usr/lib64/python2.6/urllib2.py", line 369, in _call_chain
    result = func(*args)
  File "/usr/lib64/python2.6/urllib2.py", line 518, in http_error_default
    raise HTTPError(req.get_full_url(), code, msg, hdrs, fp)
urllib2.HTTPError: HTTP Error 400: BAD_REQUEST

而curl 是可以的

[root@123 test]# curl -I 'http://redirect.viglink.com?key=4f41d321ffc89f8abfd39904671d7ab7&u=http%3A%2F%2Fwww.newegg.com%2FProduct%2FProduct.aspx%3Fnm_mc%3DAFC-dealmoon%26cm_mmc%3DAFC-dealmoon-_-NA-_-NA-_-NA%26Item%3DN82E16820147192'
HTTP/1.1 307 Temporary Redirect
Cache-Control: no-cache
Cache-Control: no-store
Content-length: 0
Date: Tue, 26 Feb 2013 09:03:13 GMT
Expires: Thu, 01 Jan 1970 00:00:00 GMT
Location: http://viglink.pgpartner.com/rd.php?r=280&m=1069763726&q=n&rdgt=1361801639&it=1361974439&et=1362406439&priceret=149.99&pg=~~3&k=3e4617236e1334fcb8741d8ab57a3b72&source=feed&url=http%3A%2F%2Fwww%2Enewegg%2Ecom%2FProduct%2FProduct%2Easpx%3FItem%3DN82E16820147192%26nm%5Fmc%3DOTC%2Dpr1c3grabb3r%26cm%5Fmmc%3DOTC%2Dpr1c3grabb3r%2D%5F%2DSolid%2BState%2BDisk%2D%5F%2DSAMSUNG%2D%5F%2D20147192&st=feed&mt=~~~~~~~viglink_106942~n~~~
Pragma: no-cache
Server: Apache-Coyote/1.1
Connection: keep-alive