Metacat

#!/usr/bin/env python

"""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.  If you can get your code signed (see:

http://trac.openlayers.org/wiki/HowToSignJavascript), then you should

modify Parameters.js so that this isn't used.  Otherwise, you're stuck

with it.  It only loads pages via http and https, but it can load any

content type. XML and HTML are both currently used by Openlayers."""

import urllib

import cgi

fs = cgi.FieldStorage()

url = fs.getvalue('url', "http://openlayers.org")

# Designed to prevent Open Proxy type stuff.

allowedHosts = ['www.openlayers.org', 'openlayers.org', 'octo.metacarta.com', 'merrimack.metacarta.com', 'labs.metacarta.com']

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."

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

        y = urllib.urlopen(url)

        headers = str(y.info()).split('\n')

        for h in headers:

            if h.startswith("Content-Type:"):

                print h

        print

        print y.read()

        y.close()

    else:

        print """Content-Type: text/plain

Illegal request."""

except Exception, E:

    print "Status: 500 Unexpected Error"

    print "Content-Type: text/plain"

    print 

    print "Some unexpected error occurred. Error text was:", E