[Python] Building a proxy

[ki4jgt]

How do I build a local proxy with Python?
Situation:
I want to run the browser through the proxy at 127.0.0.1:XXXX and when the browser asks for a file protocol XXX:// I want the proxy to download the file from a certain website/predefined location and feed it to the browser. How would I get the proxy to interact with the browser? (Basically how are the protocols setup) How would I configure a start page to adjust settings when the user went to http://127.0.0.1:XXXX
All help appreciated.

[Petrolea]

You want to make a proxy with Python? I mean, code it yourself? Or are you just looking for a script that would set this up for you?

[ki4jgt]

I want to code it myself, I have a script I just wrote, but need to find out how to read only one line of the rec data (A multilined string) so I can seperate the GET url from the rest of the data. BTW: If anyone has any suggestions to this script, please let me know.



#!/usr/bin/env python

def rl(str):
list = []
while str <> "":
end = str.find(chr(13))
if end == -1:
end = str.find(chr(10))
if end == -1:
end = str.find("\n")
phrase = str[:end]
str.replace(phrase, "", 1)
list.append(phrase)
return list

import socket
import urllib2
import readline

getend = 1
backlog = 5
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind(("",7890))
s.listen(backlog)
while 1:
client, address = s.accept()
data = client.recv(500000)
print data
url = rl(data)
urls = url[0]
if urls.find(" ") == 0:
getend = urls.find(" ")
if getend <> 0:
urls = urls[4:getend]
if getend == 0:
urls = urls[4:]
rechtml = urllib2.urlopen(urls)
html = rechtml.read()
if data:
client.send(html)
client.close()

[Petrolea]

I want to code it myself, I have a script I just wrote, but need to find out how to read only one line of the rec data (A multilined string) so I can seperate the GET url from the rest of the data. BTW: If anyone has any suggestions to this script, please let me know.



#!/usr/bin/env python

def rl(str):
list = []
while str <> "":
end = str.find(chr(13))
if end == -1:
end = str.find(chr(10))
if end == -1:
end = str.find("\n")
phrase = str[:end]
str.replace(phrase, "", 1)
list.append(phrase)
return list

import socket
import urllib2
import readline

getend = 1
backlog = 5
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind(("",7890))
s.listen(backlog)
while 1:
client, address = s.accept()
data = client.recv(500000)
print data
url = rl(data)
urls = url[0]
if urls.find(" ") == 0:
getend = urls.find(" ")
if getend <> 0:
urls = urls[4:getend]
if getend == 0:
urls = urls[4:]
rechtml = urllib2.urlopen(urls)
html = rechtml.read()
if data:
client.send(html)
client.close()


Read the string till you encounter a new line.

[ki4jgt]

#!/usr/bin/env python

import socket
import urllib2

backlog = 5
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind(("",7890))
s.listen(backlog)
while 1:
client, address = s.accept()
data = client.recv(500000)
print data
datas = data.split()
print datas
if datas[0] == "GET":
page = urllib2.urlopen(datas[1])
data = page.read()
if data:
client.send(data)
client.close()


New code. Shorter and simpler ;-)