一个url编解码的小程序，通常google搜索结果页面在跳转到真实页面时，需要经过google自身的url，但是有时候会被reset，通过这个代码可以直接获取真实地址。

url-decoder.py

#!/bin/env python
# coding=utf-8
#
# a basic url decoder can be helpful to find out the real page link, when you google refered page was blocked by the GFW 
#

from urllib2 import quote, unquote
from getopt import getopt, GetoptError
import sys

def usage():
	print "parser.py -e url -d url(encoded)"

def main():
	try:
		opts, args = getopt(sys.argv[1:], "e:d:h",["help"])
	except  GetoptError as err:
		print str(err)
		usage()
		sys.exit(2)
	#print opts
	#print args
	url = None
	decode = False
	for o, a in opts:
		if o == "-d":
			decode = True
			url = a
		elif o == "-e":
			decode = False
			url = a
		elif o in ("-h", "--help"):
			usage();
			sys.exit(0)
		else:
			assert False, "unhandled option"

		if decode:
			print "Decoding..."
			s = unquote(url.encode("utf8"))
			print s
			print "Splitting with =/&"
			ss =  s.split("&")
			for i in ss:
				ii = i.split("=")
				if len(ii)==2:
					if ii[0] == "url":
						print ii[1]
			print "Done"
		else:
			print "Encoding..."
			print quote(url.encode("utf8"))
			print "Done"

if __name__ == "__main__":
	main()