用 Flora_Pac.py 生成自动翻墙的 pac 文件

#!/usr/bin/env python
#
# Flora_Pac by @leaskh
# www.leaskh.com, i@leaskh.com
#
# based on chnroutes project (by Numb.Majority@gmail.com)
#

import re
import urllib2
import argparse
import math

def generate_pac(proxy):
results  = fetch_ip_data()
pacfile  = 'flora_pac.pac'
rfile    = open(pacfile, 'w')
strLines = (
"// Flora_Pac by @leaskh"
"\n// www.leaskh.com, i@leaskh.com"
"\n"
"\nfunction FindProxyForURL(url, host)"
"\n{"
"\n"
"\n    var list = ["
)
intLines = 0
for ip,mask,_ in results:
if intLines > 0:
strLines = strLines + ','
intLines = intLines + 1
strLines = strLines + "\n        ['%s', '%s']"%(ip, mask)
strLines = strLines + (
"\n    ];"
"\n"
"\n    var ip = dnsResolve(host);"
"\n"
"\n    for (var i in list) {"
"\n        if (isInNet(ip, list[i][0], list[i][1])) {"
"\n            return 'DIRECT';"
"\n        }"
"\n    }"
"\n"
"\n    return '%s';"
"\n"
"\n}"
"\n"%(proxy)
)
rfile.write(strLines)
rfile.close()
print ("Rules: %d items.\n"
"Usage: Use the newly created %s as your web browser's automatic "
"proxy configuration (.pac) file."%(intLines, pacfile))

def fetch_ip_data():
#fetch data from apnic
print "Fetching data from apnic.net, it might take a few minutes, please wait..."
url=r'http://ftp.apnic.net/apnic/stats/apnic/delegated-apnic-latest'
data=urllib2.urlopen(url).read()

cnregex=re.compile(r'apnic\|cn\|ipv4\|[0-9\.]+\|[0-9]+\|[0-9]+\|a.*',re.IGNORECASE)
cndata=cnregex.findall(data)

results=[]

for item in cndata:
unit_items=item.split('|')
starting_ip=unit_items[3]
num_ip=int(unit_items[4])

imask=0xffffffff^(num_ip-1)
#convert to string
imask=hex(imask)[2:]
mask=[0]*4
mask[0]=imask[0:2]
mask[1]=imask[2:4]
mask[2]=imask[4:6]
mask[3]=imask[6:8]

#convert str to int
mask=[ int(i,16 ) for i in mask]
mask="%d.%d.%d.%d"%tuple(mask)

#mask in *nix format
mask2=32-int(math.log(num_ip,2))

results.append((starting_ip,mask,mask2))

return results

if __name__=='__main__':
parser=argparse.ArgumentParser(description="Generate proxy auto-config rules.")
parser.add_argument('-x', '--proxy',
dest = 'proxy',
default = 'SOCKS 127.0.0.1:8964',
nargs = '?',
help = "Proxy Server, examples: "
"SOCKS 127.0.0.1:8964; "
"SOCKS5 127.0.0.1:8964; "
"PROXY 127.0.0.1:8964")

args = parser.parse_args()

generate_pac(args.proxy)

####### 获得帮助:
$ python flora_pac.py -h
usage: flora_pac.py [-h] [-x [PROXY]]
Generate proxy auto-config rules.
optional arguments:
-h, --help            show this help message and exit
-x [PROXY], --proxy [PROXY]
Proxy Server, examples:
SOCKS 127.0.0.1:8964;
SOCKS5 127.0.0.1:8964;
PROXY 127.0.0.1:8964

####### 生成 pac 文件，国外 IP 通过代理 SOCKS 代理 127.0.0.1:8964 访问:
$ python flora_pac.py -x 'SOCKS 127.0.0.1:8964'
Fetching data from apnic.net, it might take a few minutes, please wait...
Rules: 3460 items.
Usage: Use the newly created flora_pac.pac as your web browser's automatic proxy configuration (.pac) file.

####### 生成 pac 文件，国外 IP 通过代理 HTTP 代理 127.0.0.1:8964 访问:
$ python flora_pac.py -x 'PROXY 127.0.0.1:8964'
Fetching data from apnic.net, it might take a few minutes, please wait...
Rules: 3460 items.
Usage: Use the newly created flora_pac.pac as your web browser's automatic proxy configuration (.pac) file.