First commit
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Juhani Krekelä
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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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#
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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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# 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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# iv. rights protecting against unfair competition in regards to a Work,
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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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#
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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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# Affirmer's express Statement of Purpose.
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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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# 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 base64
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import html
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import http.server
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import os
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import sys
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import urllib.parse
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files = {}
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def gen_id():
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return base64.urlsafe_b64encode(os.urandom(48 * 6 // 8)).decode()
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def process_file(file_id):
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r = []
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for line in files[file_id]:
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r.append('<code>%s</code>' % html.escape(line))
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return '\n'.join(r)
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def run_command(keyvalues):
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file_id = keyvalues['id'][-1]
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cmd = keyvalues['cmd'][-1]
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linenum = int(keyvalues['linenum'][-1])
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assert cmd in ['append', 'delete']
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if cmd == 'append':
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line = keyvalues['line'][-1]
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before = files[file_id][:linenum]
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after = files[file_id][linenum:]
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files[file_id] = before + [line] + after
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elif cmd == 'delete':
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assert 0 < linenum <= len(files[file_id])
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del files[file_id][linenum - 1]
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class WebEd(http.server.BaseHTTPRequestHandler):
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def redirect(self, path):
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self.send_response(303)
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self.send_header('Content-Type', 'text/plain; charset=utf-8')
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self.send_header('Content-Length', 0)
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self.send_header('Location', path)
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self.end_headers()
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def send_html(self, html, status_code = 200):
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encoded = html.encode('utf-8')
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length = len(encoded)
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self.send_response(status_code)
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self.send_header('Content-Type', 'text/html; charset=utf-8')
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self.send_header('Content-Length', length)
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self.end_headers()
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self.wfile.write(encoded)
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def do_GET(self):
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url, _, keyvalues = self.path.partition('?')
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keyvalues = urllib.parse.parse_qs(keyvalues)
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if url == '/' and 'id' not in keyvalues:
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# Generate new ID
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file_id = gen_id()
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self.redirect('%s?id=%s' % (url, file_id))
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elif 'id' not in keyvalues:
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self.send_html("""
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<!DOCTYPE html>
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<html>
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<head>
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<title>404 Not Found</title>
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</head>
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<body>
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<p>404 Not Found</p>
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</body>
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</html>
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""", 404)
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else:
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file_id = keyvalues['id'][-1]
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if file_id not in files:
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files[file_id] = []
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if 'cmd' in keyvalues:
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try:
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run_command(keyvalues)
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except Exception as err:
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self.send_html("""
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<!DOCTYPE html>
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<html>
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<head>
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<title>400 Bad Request</title>
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</head>
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<body>
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<p>400 Bad Request</p>
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</body>
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</html>
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""", 400)
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return
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self.redirect('%s?id=%s' % (url, file_id))
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self.send_html("""<!DOCTYPE html>
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<html>
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<head>
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<title>WebEd</title>
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<style type="text/css">
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pre { white-space: pre-wrap; counter-reset: linenum; }
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code::before { counter-increment: linenum; content: counter(linenum) " "; }
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</style>
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</head>
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<body>
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<p>
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<pre>%s</pre>
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</p>
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<p>
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<form action="" method="get">
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<input type="hidden" name="id" value="%s"/>
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<ul>
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<li>
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<label for="append">append</label>
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<input type="radio" checked="true" name="cmd" id="append" value="append"/>
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</li>
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<li>
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<label for="delete">delete</label>
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<input type="radio" name="cmd" id="delete" value="delete"/>
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</li>
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</ul>
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<label>Line</label>
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<input type="number" name="linenum" min="0" max="%i" value="%i"/>
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<input type="input" name="line"/>
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<input type="submit" value="run"/>
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</form>
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</p>
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</body>
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</html>""" % (process_file(file_id), file_id, len(files[file_id]), len(files[file_id])))
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def main():
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http.server.HTTPServer(('', int(sys.argv[1])), WebEd).serve_forever()
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if __name__ == '__main__':
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main()
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