source: trunk/openlayers/examples/proxy.cgi

Last change on this file was 11781, checked in by bartvde, 6 years ago

add support for OpenLS (Location Utility Service), thanks cmoullet for the great example, p=me,r=cmoullet,erilem,fredj (closes #2953)

  • Property svn:eol-style set to native
  • Property svn:executable set to *
File size: 2.5 KB
Line 
1#!/usr/bin/env python
2
3
4"""This is a blind proxy that we use to get around browser
5restrictions that prevent the Javascript from loading pages not on the
6same server as the Javascript.  This has several problems: it's less
7efficient, it might break some sites, and it's a security risk because
8people can use this proxy to browse the web and possibly do bad stuff
9with it.  It only loads pages via http and https, but it can load any
10content type. It supports GET and POST requests."""
11
12import urllib2
13import cgi
14import sys, os
15
16# Designed to prevent Open Proxy type stuff.
17
18allowedHosts = ['www.openlayers.org', 'openlayers.org', 
19                'labs.metacarta.com', 'world.freemap.in', 
20                'prototype.openmnnd.org', 'geo.openplans.org',
21                'sigma.openplans.org', 'demo.opengeo.org',
22                'www.openstreetmap.org', 'sample.azavea.com',
23                'v2.suite.opengeo.org', 'v-swe.uni-muenster.de:8080', 
24                'vmap0.tiles.osgeo.org', 'www.openrouteservice.org']
25
26method = os.environ["REQUEST_METHOD"]
27
28if method == "POST":
29    qs = os.environ["QUERY_STRING"]
30    d = cgi.parse_qs(qs)
31    if d.has_key("url"):
32        url = d["url"][0]
33    else:
34        url = "http://www.openlayers.org"
35else:
36    fs = cgi.FieldStorage()
37    url = fs.getvalue('url', "http://www.openlayers.org")
38
39try:
40    host = url.split("/")[2]
41    if allowedHosts and not host in allowedHosts:
42        print "Status: 502 Bad Gateway"
43        print "Content-Type: text/plain"
44        print
45        print "This proxy does not allow you to access that location (%s)." % (host,)
46        print
47        print os.environ
48 
49    elif url.startswith("http://") or url.startswith("https://"):
50   
51        if method == "POST":
52            length = int(os.environ["CONTENT_LENGTH"])
53            headers = {"Content-Type": os.environ["CONTENT_TYPE"]}
54            body = sys.stdin.read(length)
55            r = urllib2.Request(url, body, headers)
56            y = urllib2.urlopen(r)
57        else:
58            y = urllib2.urlopen(url)
59       
60        # print content type header
61        i = y.info()
62        if i.has_key("Content-Type"):
63            print "Content-Type: %s" % (i["Content-Type"])
64        else:
65            print "Content-Type: text/plain"
66        print
67       
68        print y.read()
69       
70        y.close()
71    else:
72        print "Content-Type: text/plain"
73        print
74        print "Illegal request."
75
76except Exception, E:
77    print "Status: 500 Unexpected Error"
78    print "Content-Type: text/plain"
79    print 
80    print "Some unexpected error occurred. Error text was:", E
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