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# Copyright (c) 2020-2021 Pacman Development Team <pacman-dev@archlinux.org>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import http
import http.server
import sys
import re
class pmHTTPServer(http.server.ThreadingHTTPServer):
pass
class pmHTTPRequestHandler(http.server.BaseHTTPRequestHandler):
"""BaseHTTPRequestHandler subclass with helper methods and common setup"""
logfile = sys.stderr
def respond(self, response, headers={}, code=200):
self.protocol_version = "HTTP/1.1"
self.send_response(code)
for header, value in headers.items():
self.send_header(header, value)
self.end_headers()
self.wfile.write(response)
def parse_range_bytes(self, text):
parser = re.compile(r'^bytes=(\d+)-(\d+)?$')
if m := parser.match(text):
return map(lambda d: None if d is None else int(d), m.groups())
else:
raise ValueError("Unrecognized Range value")
def respond_bytes(self, response, headers={}, code=200):
headers = headers.copy()
if code == 200 and self.headers['Range']:
(start, end) = self.parse_range_bytes(self.headers['Range'])
code = 206
response = response[start:end]
headers.setdefault('Content-Range', 'bytes */%s' % (len(response)))
headers.setdefault('Content-Type', "application/octet-stream")
headers.setdefault('Content-Length', str(len(response)))
self.respond(response, headers, code)
def respond_string(self, response, headers={}, code=200):
headers = headers.copy()
headers.setdefault('Content-Type', 'text/plain; charset=utf-8')
self.respond_bytes(response.encode('UTF-8'), headers, code)
def log_message(self, format, *args):
if callable(self.logfile):
self.logfile = self.logfile()
self.logfile.write("%s - - [%s] %s\n" %
(self.address_string(),
self.log_date_time_string(),
format%args))
class pmStringHTTPRequestHandler(pmHTTPRequestHandler):
"""pmHTTPRequestHandler subclass to respond with simple string messages"""
responses = dict()
def do_GET(self):
response = self.responses.get(self.path, self.responses.get(''))
if response is not None:
if isinstance(response, dict):
self.respond_string(
response.get('body', ''),
headers=response.get('headers', {}),
code=response.get('code', 200))
else:
self.respond_string(response)
else:
self.send_error(http.HTTPStatus.NOT_FOUND);
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