commit 27c706656db3278c747394d7ea2f953248b0a431 Author: Juhani Krekelä Date: Wed Apr 22 16:43:59 2020 +0300 First commit diff --git a/oftgophproxy.py b/oftgophproxy.py new file mode 100644 index 0000000..483abdc --- /dev/null +++ b/oftgophproxy.py @@ -0,0 +1,209 @@ +#!/usr/bin/env python3 + +# ------------------------------------------------------------------ +# CC0 1.0 Universal +# # +# Statement of Purpose +# +# The laws of most jurisdictions throughout the world automatically confer +# exclusive Copyright and Related Rights (defined below) upon the creator and +# subsequent owner(s) (each and all, an "owner") of an original work of +# authorship and/or a database (each, a "Work"). +# +# Certain owners wish to permanently relinquish those rights to a Work for the +# purpose of contributing to a commons of creative, cultural and scientific +# works ("Commons") that the public can reliably and without fear of later +# claims of infringement build upon, modify, incorporate in other works, reuse +# and redistribute as freely as possible in any form whatsoever and for any +# purposes, including without limitation commercial purposes. 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Affirmer understands and acknowledges that Creative Commons is not a +# party to this document and has no duty or obligation with respect to this +# CC0 or use of the Work. +# +# For more information, please see +# +# ------------------------------------------------------------------ + +import http.server +import sys +import urllib.request + +timeout = 5 + +pathprefix = None +base_url = None + +class Proxy(http.server.BaseHTTPRequestHandler): + server_version = 'Oftgophproxy/0.1' + + def error(self, code, text): + contents = text.encode('utf-8') + + self.send_response(code) + self.send_header('Content-Type', 'text/plain; charset=utf-8') + self.send_header('Content-Length', len(contents)) + self.end_headers() + self.wfile.write(contents) + + def do_GET(self): + if self.path[:len(pathprefix)] == pathprefix: + path = self.path[len(pathprefix):] + else: + path = self.path + + if len(path) > 0 and path[0] != '/': + path = '/' + path + + request_url = base_url + path + + try: + r = urllib.request.urlopen(request_url, timeout = timeout) + except urllib.error.HTTPError as err: + if err.code == 400: + self.error(400, 'Remote returned 400 Bad Request\n\nMake sure you remembered to use the itemtype') + else: + self.error(502, 'Remote returned %i %s' % (err.code, err.reason)) + return + + except urllib.error.URLError as err: + self.error(502, 'Could not connect to remote') + return + + mimetype = None + for key, value in r.info().items(): + if key.lower() == 'content-type': + mimetype = value + + if mimetype is None: + self.error(502, 'Remote did not include content-type') + return + + contents = r.read() + + self.send_response(200) + self.send_header('Content-Type', mimetype) + self.send_header('Content-Length', len(contents)) + self.end_headers() + self.wfile.write(contents) + +def main(): + global pathprefix + global base_url + + if len(sys.argv) != 4: + print('Usage: %s port pathprefix remote' % sys.argv[0], file=sys.stderr) + sys.exit(1) + + try: + port = int(sys.argv[1]) + except ValueError: + print('%s: Error: "%s" not a valid port number' % sys.argv[0], file=sys.stderr) + sys.exit(1) + + if port <= 0 or port >= (2**16): + print('%s: Error: Port number %i out of valid range' % (sys.argv[0], port)) + sys.exit(1) + + pathprefix = sys.argv[2] + + base_url = sys.argv[3] + + http.server.HTTPServer(('', port), Proxy).serve_forever() + +if __name__ == '__main__': + main()