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#!/usr/bin/env python3
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# ------------------------------------------------------------------
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# CC0 1.0 Universal
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# #
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# Statement of Purpose
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#
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# The laws of most jurisdictions throughout the world automatically confer
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# exclusive Copyright and Related Rights (defined below) upon the creator and
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# subsequent owner(s) (each and all, an "owner") of an original work of
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# authorship and/or a database (each, a "Work").
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#
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# Certain owners wish to permanently relinquish those rights to a Work for the
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# purpose of contributing to a commons of creative, cultural and scientific
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# works ("Commons") that the public can reliably and without fear of later
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# claims of infringement build upon, modify, incorporate in other works, reuse
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# and redistribute as freely as possible in any form whatsoever and for any
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# purposes, including without limitation commercial purposes. These owners may
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# contribute to the Commons to promote the ideal of a free culture and the
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# further production of creative, cultural and scientific works, or to gain
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# reputation or greater distribution for their Work in part through the use and
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# efforts of others.
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#
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# For these and/or other purposes and motivations, and without any expectation
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# of additional consideration or compensation, the person associating CC0 with a
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# Work (the "Affirmer"), to the extent that he or she is an owner of Copyright
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# and Related Rights in the Work, voluntarily elects to apply CC0 to the Work
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# and publicly distribute the Work under its terms, with knowledge of his or her
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# Copyright and Related Rights in the Work and the meaning and intended legal
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# effect of CC0 on those rights.
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#
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# 1. Copyright and Related Rights. A Work made available under CC0 may be
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# protected by copyright and related or neighboring rights ("Copyright and
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# Related Rights"). Copyright and Related Rights include, but are not limited
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# to, the following:
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#
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# i. the right to reproduce, adapt, distribute, perform, display, communicate,
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# and translate a Work;
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#
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# ii. moral rights retained by the original author(s) and/or performer(s);
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#
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# iii. publicity and privacy rights pertaining to a person's image or likeness
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# depicted in a Work;
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#
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# iv. rights protecting against unfair competition in regards to a Work,
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# subject to the limitations in paragraph 4(a), below;
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#
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# v. rights protecting the extraction, dissemination, use and reuse of data in
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# a Work;
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#
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# vi. database rights (such as those arising under Directive 96/9/EC of the
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# European Parliament and of the Council of 11 March 1996 on the legal
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# protection of databases, and under any national implementation thereof,
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# including any amended or successor version of such directive); and
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#
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# vii. other similar, equivalent or corresponding rights throughout the world
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# based on applicable law or treaty, and any national implementations thereof.
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#
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# 2. Waiver. To the greatest extent permitted by, but not in contravention of,
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# applicable law, Affirmer hereby overtly, fully, permanently, irrevocably and
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# unconditionally waives, abandons, and surrenders all of Affirmer's Copyright
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# and Related Rights and associated claims and causes of action, whether now
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# known or unknown (including existing as well as future claims and causes of
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# action), in the Work (i) in all territories worldwide, (ii) for the maximum
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# duration provided by applicable law or treaty (including future time
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# extensions), (iii) in any current or future medium and for any number of
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# copies, and (iv) for any purpose whatsoever, including without limitation
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# commercial, advertising or promotional purposes (the "Waiver"). Affirmer makes
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# the Waiver for the benefit of each member of the public at large and to the
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# detriment of Affirmer's heirs and successors, fully intending that such Waiver
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# shall not be subject to revocation, rescission, cancellation, termination, or
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# any other legal or equitable action to disrupt the quiet enjoyment of the Work
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# by the public as contemplated by Affirmer's express Statement of Purpose.
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#
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# 3. Public License Fallback. Should any part of the Waiver for any reason be
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# judged legally invalid or ineffective under applicable law, then the Waiver
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# shall be preserved to the maximum extent permitted taking into account
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# Affirmer's express Statement of Purpose. In addition, to the extent the Waiver
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# is so judged Affirmer hereby grants to each affected person a royalty-free,
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# non transferable, non sublicensable, non exclusive, irrevocable and
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# unconditional license to exercise Affirmer's Copyright and Related Rights in
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# the Work (i) in all territories worldwide, (ii) for the maximum duration
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# provided by applicable law or treaty (including future time extensions), (iii)
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# in any current or future medium and for any number of copies, and (iv) for any
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# purpose whatsoever, including without limitation commercial, advertising or
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# promotional purposes (the "License"). The License shall be deemed effective as
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# of the date CC0 was applied by Affirmer to the Work. Should any part of the
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# License for any reason be judged legally invalid or ineffective under
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# applicable law, such partial invalidity or ineffectiveness shall not
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# invalidate the remainder of the License, and in such case Affirmer hereby
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# affirms that he or she will not (i) exercise any of his or her remaining
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# Copyright and Related Rights in the Work or (ii) assert any associated claims
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# and causes of action with respect to the Work, in either case contrary to
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# Affirmer's express Statement of Purpose.
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#
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# 4. Limitations and Disclaimers.
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#
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# a. No trademark or patent rights held by Affirmer are waived, abandoned,
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# surrendered, licensed or otherwise affected by this document.
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#
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# b. Affirmer offers the Work as-is and makes no representations or warranties
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# of any kind concerning the Work, express, implied, statutory or otherwise,
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# including without limitation warranties of title, merchantability, fitness
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# for a particular purpose, non infringement, or the absence of latent or
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# other defects, accuracy, or the present or absence of errors, whether or not
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# discoverable, all to the greatest extent permissible under applicable law.
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#
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# c. Affirmer disclaims responsibility for clearing rights of other persons
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# that may apply to the Work or any use thereof, including without limitation
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# any person's Copyright and Related Rights in the Work. Further, Affirmer
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# disclaims responsibility for obtaining any necessary consents, permissions
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# or other rights required for any use of the Work.
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#
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# d. Affirmer understands and acknowledges that Creative Commons is not a
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# party to this document and has no duty or obligation with respect to this
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# CC0 or use of the Work.
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#
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# For more information, please see
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# <http://creativecommons.org/publicdomain/zero/1.0/>
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# ------------------------------------------------------------------
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import http.server
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import sys
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import urllib.request
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timeout = 5
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pathprefix = None
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base_url = None
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class Proxy(http.server.BaseHTTPRequestHandler):
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server_version = 'Oftgophproxy/0.1'
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def error(self, code, text):
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contents = text.encode('utf-8')
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self.send_response(code)
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self.send_header('Content-Type', 'text/plain; charset=utf-8')
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self.send_header('Content-Length', len(contents))
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self.end_headers()
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self.wfile.write(contents)
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def do_GET(self):
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if self.path[:len(pathprefix)] == pathprefix:
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path = self.path[len(pathprefix):]
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else:
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path = self.path
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if len(path) > 0 and path[0] != '/':
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path = '/' + path
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request_url = base_url + path
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try:
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r = urllib.request.urlopen(request_url, timeout = timeout)
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except urllib.error.HTTPError as err:
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if err.code == 400:
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self.error(400, 'Remote returned 400 Bad Request\n\nMake sure you remembered to use the itemtype')
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else:
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self.error(502, 'Remote returned %i %s' % (err.code, err.reason))
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return
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except urllib.error.URLError as err:
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self.error(502, 'Could not connect to remote')
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return
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mimetype = None
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for key, value in r.info().items():
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if key.lower() == 'content-type':
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mimetype = value
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if mimetype is None:
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self.error(502, 'Remote did not include content-type')
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return
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contents = r.read()
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self.send_response(200)
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self.send_header('Content-Type', mimetype)
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self.send_header('Content-Length', len(contents))
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self.end_headers()
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self.wfile.write(contents)
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def main():
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global pathprefix
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global base_url
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if len(sys.argv) != 4:
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print('Usage: %s port pathprefix remote' % sys.argv[0], file=sys.stderr)
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sys.exit(1)
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try:
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port = int(sys.argv[1])
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except ValueError:
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print('%s: Error: "%s" not a valid port number' % sys.argv[0], file=sys.stderr)
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sys.exit(1)
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if port <= 0 or port >= (2**16):
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print('%s: Error: Port number %i out of valid range' % (sys.argv[0], port))
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sys.exit(1)
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pathprefix = sys.argv[2]
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base_url = sys.argv[3]
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http.server.HTTPServer(('', port), Proxy).serve_forever()
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if __name__ == '__main__':
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main()
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