proxy.cgi

#!C:/ms4w/Python/python.exe
#coding : utf-8
#enable debugging
# Designed to prevent Open Proxy type stuff.
import urllib
import urllib.parse
import urllib3
import cgi
import sys, os

"""This is a blind proxy that we use to get around browser
restrictions

that prevent the Javascript from loading pages not on the
same server as the Javascript.  This

has several problems: it's less
efficient, it might break some sites, and it's a security risk

because
people can use this proxy to browse the web and possibly do bad stuff
with it.  It only

loads pages via http and https, but it can load any
content type. It supports GET and POST

requests."""


allowedHosts = [ 'www.openlayers.org', 'http://localhost/tinyows/demo/tinyows.html',  'www.openstreetmap.org']

method = os.environ["REQUEST_METHOD"]

if method == "POST":
    qs = os.environ["QUERY_STRING"]
    d = urllib.parse.parse_qs(qs)
    if "url" in d :
        url = d["url"][0]
    else:
        url = "http://www.openlayers.org"
else:
    fs = cgi.FieldStorage()
    url = fs.getvalue('url', "http://www.openlayers.org")

try:
    host = url.split("/")[2]
    if allowedHosts and not host in allowedHosts:
        print ("Status: 502 Bad Gateway")
        print ("Content-Type: text/plain")
        print
        print ("This proxy does not allow you to access that location (%s).") % (host,)
        print
        print (os.environ)

    elif url.startswith("http://") or url.startswith("https://"):

        if method == "POST":
            length = int(os.environ["CONTENT_LENGTH"])
            headers = {"Content-Type": os.environ["CONTENT_TYPE"]}
            body = sys.stdin.read(length)
            r = urllib3.Request(url, body, headers)
            y = urllib3.urlopen(r)
        else:
            y = urllib3.urlopen(url)
            # print content type header
            i = y.info()
        if "Content-Type" in i:
            print ("Content-Type: %s") % (i["Content-Type"])
        else:
            print ("Content-Type: text/plain")
            print
            print (y.read())
            y.close()
    else:
        print ("Content-Type: text/plain")
        print
        print ("Illegal request.")

except Exception as e:
    print ("Status: 500 Unexpected Error")
    print ("Content-Type: text/plain")
    print
    print ("Some unexpected error occurred. Error text was:"), e