mirror of https://github.com/Mikaela/Limnoria.git
402 lines
13 KiB
Python
402 lines
13 KiB
Python
###
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# Copyright (c) 2011, Valentin Lorentz
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are met:
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#
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# * Redistributions of source code must retain the above copyright notice,
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# this list of conditions, and the following disclaimer.
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# * Redistributions in binary form must reproduce the above copyright notice,
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# this list of conditions, and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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# * Neither the name of the author of this software nor the name of
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# contributors to this software may be used to endorse or promote products
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# derived from this software without specific prior written consent.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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###
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"""
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An embedded and centralized HTTP server for Supybot's plugins.
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"""
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import os
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import sys
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import cgi
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import socket
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from threading import Event, Thread
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from cStringIO import StringIO
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from SocketServer import ThreadingMixIn
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from BaseHTTPServer import HTTPServer, BaseHTTPRequestHandler
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# For testing purposes
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from SocketServer import StreamRequestHandler
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import supybot.log as log
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import supybot.conf as conf
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import supybot.world as world
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from supybot.i18n import PluginInternationalization
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_ = PluginInternationalization()
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configGroup = conf.supybot.servers.http
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class RequestNotHandled(Exception):
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pass
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DEFAULT_TEMPLATES = {
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'index.html': """\
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="fr" lang="fr">
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<head>
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<title>""" + _('Supybot Web server index') + """</title>
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<link rel="stylesheet" href="/default.css" />
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</head>
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<body class="purelisting">
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<h1>Supybot web server index</h1>
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<p>""" + _('Here is a list of the plugins that have a Web interface:') +\
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"""
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</p>
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%(list)s
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</body>
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</html>""",
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'generic/error.html': """\
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<html>
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<head>
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<title>%(title)s</title>
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<link rel="stylesheet" href="/default.css" />
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</head>
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<body class="error">
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<h1>Error</h1>
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<p>%(error)s</p>
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</body>
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</html>""",
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'default.css': """\
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body {
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background-color: #F0F0F0;
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}
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/************************************
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* Classes that plugins should use. *
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************************************/
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/* Error pages */
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body.error {
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text-align: center;
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}
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body.error p {
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background-color: #FFE0E0;
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border: 1px #FFA0A0 solid;
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}
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/* Pages that only contain a list. */
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.purelisting {
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text-align: center;
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}
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.purelisting ul li {
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list-style-type: none;
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}
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/* Pages that only contain a table. */
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.puretable {
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text-align: center;
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}
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.puretable table
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{
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width: 100%;
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border-collapse: collapse;
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text-align: center;
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}
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.puretable table th
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{
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/*color: #039;*/
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padding: 10px 8px;
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border-bottom: 2px solid #6678b1;
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}
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.puretable table td
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{
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padding: 9px 8px 0px 8px;
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border-bottom: 1px solid #ccc;
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}
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""",
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'robots.txt': """""",
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}
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def set_default_templates(defaults):
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for filename, content in defaults.items():
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path = conf.supybot.directories.data.web.dirize(filename)
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if os.path.isfile(path + '.example'):
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os.unlink(path + '.example')
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if not os.path.isdir(os.path.dirname(path)):
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os.makedirs(os.path.dirname(path))
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with open(path + '.example', 'a') as fd:
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fd.write(content)
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set_default_templates(DEFAULT_TEMPLATES)
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def get_template(filename):
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path = conf.supybot.directories.data.web.dirize(filename)
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if os.path.isfile(path):
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return open(path, 'r').read()
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else:
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assert os.path.isfile(path + '.example'), path + '.example'
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return open(path + '.example', 'r').read()
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class RealSupyHTTPServer(HTTPServer):
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# TODO: make this configurable
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timeout = 0.5
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running = False
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def __init__(self, address, protocol, callback):
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if protocol == 4:
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self.address_family = socket.AF_INET
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elif protocol == 6:
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self.address_family = socket.AF_INET6
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else:
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raise AssertionError(protocol)
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HTTPServer.__init__(self, address, callback)
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self.callbacks = {}
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def hook(self, subdir, callback):
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if subdir in self.callbacks:
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log.warning(('The HTTP subdirectory `%s` was already hooked but '
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'has been claimed by another plugin (or maybe you '
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'reloaded the plugin and it didn\'t properly unhook. '
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'Forced unhook.') % subdir)
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self.callbacks[subdir] = callback
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def unhook(self, subdir):
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callback = self.callbacks.pop(subdir) # May raise a KeyError. We don't care.
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callback.doUnhook(self)
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return callback
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def __str__(self):
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return 'server at %s %i' % self.server_address[0:2]
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class TestSupyHTTPServer(RealSupyHTTPServer):
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def __init__(self, *args, **kwargs):
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self.callbacks = {}
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def serve_forever(self, *args, **kwargs):
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pass
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def shutdown(self, *args, **kwargs):
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pass
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if world.testing:
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SupyHTTPServer = TestSupyHTTPServer
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else:
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SupyHTTPServer = RealSupyHTTPServer
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class SupyHTTPRequestHandler(BaseHTTPRequestHandler):
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def do_X(self, callbackMethod, *args, **kwargs):
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if self.path == '/':
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callback = SupyIndex()
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elif self.path in ('/robots.txt', '/default.css'):
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callback = Static()
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elif self.path == '/favicon.ico':
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callback = Favicon()
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else:
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subdir = self.path.split('/')[1]
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try:
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callback = self.server.callbacks[subdir]
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except KeyError:
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callback = Supy404()
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# Some shortcuts
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for name in ('send_response', 'send_header', 'end_headers', 'rfile',
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'wfile', 'headers'):
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setattr(callback, name, getattr(self, name))
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# We call doX, because this is more supybotic than do_X.
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path = self.path
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if not callback.fullpath:
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path = '/' + path.split('/', 2)[-1]
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getattr(callback, callbackMethod)(self, path,
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*args, **kwargs)
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def do_GET(self):
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self.do_X('doGet')
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def do_POST(self):
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if 'Content-Type' not in self.headers:
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self.headers['Content-Type'] = 'application/x-www-form-urlencoded'
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form = cgi.FieldStorage(
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fp=self.rfile,
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headers=self.headers,
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environ={'REQUEST_METHOD':'POST',
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'CONTENT_TYPE':self.headers['Content-Type'],
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})
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self.do_X('doPost', form=form)
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def do_HEAD(self):
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self.do_X('doHead')
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def log_message(self, format, *args):
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log.info('HTTP request: %s - %s' %
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(self.address_string(), format % args))
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class SupyHTTPServerCallback:
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"""This is a base class that should be overriden by any plugin that want
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to have a Web interface."""
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fullpath = False
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name = "Unnamed plugin"
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defaultResponse = _("""
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This is a default response of the Supybot HTTP server. If you see this
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message, it probably means you are developing a plugin, and you have
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neither overriden this message or defined an handler for this query.""")
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def doGet(self, handler, path, *args, **kwargs):
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handler.send_response(400)
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self.send_header('Content_type', 'text/plain; charset=utf-8')
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self.send_header('Content-Length', len(self.defaultResponse))
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self.end_headers()
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self.wfile.write(self.defaultResponse.encode())
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doPost = doHead = doGet
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def doUnhook(self, handler):
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"""Method called when unhooking this callback."""
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pass
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class Supy404(SupyHTTPServerCallback):
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"""A 404 Not Found error."""
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name = "Error 404"
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fullpath = True
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response = _("""
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I am a pretty clever IRC bot, but I suck at serving Web pages, particulary
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if I don't know what to serve.
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What I'm saying is you just triggered a 404 Not Found, and I am not
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trained to help you in such a case.""")
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def doGet(self, handler, path, *args, **kwargs):
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handler.send_response(404)
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self.send_header('Content_type', 'text/plain; charset=utf-8')
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self.send_header('Content-Length', len(self.response))
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self.end_headers()
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self.wfile.write(self.response.encode())
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doPost = doHead = doGet
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class SupyIndex(SupyHTTPServerCallback):
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"""Displays the index of available plugins."""
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name = "index"
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fullpath = True
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defaultResponse = _("Request not handled.")
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def doGet(self, handler, path):
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plugins = [x for x in handler.server.callbacks.items()]
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if plugins == []:
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plugins = _('No plugins available.')
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else:
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plugins = '<ul class="plugins"><li>%s</li></ul>' % '</li><li>'.join(
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['<a href="/%s/">%s</a>' % (x,y.name) for x,y in plugins])
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response = get_template('index.html') % {'list': plugins}
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handler.send_response(200)
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self.send_header('Content_type', 'text/html')
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self.send_header('Content-Length', len(response))
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self.end_headers()
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self.wfile.write(response)
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class Static(SupyHTTPServerCallback):
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"""Serves static files."""
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fullpath = True
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name = 'static'
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defaultResponse = _('Request not handled')
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def doGet(self, handler, path):
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response = get_template(path)
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handler.send_response(200)
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self.send_header('Content-type', 'text/plain')
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self.send_header('Content-Length', len(response))
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self.end_headers()
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self.wfile.write(response)
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class Favicon(SupyHTTPServerCallback):
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"""Services the favicon.ico file to browsers."""
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name = 'favicon'
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defaultResponse = _('Request not handled')
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def doGet(self, handler, path):
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file_path = conf.supybot.servers.http.favicon()
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found = False
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if file_path:
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try:
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icon = open(file_path, 'r')
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found = True
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except IOError:
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pass
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if found:
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response = icon.read()
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filename = file_path.rsplit(os.sep, 1)[1]
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if '.' in filename:
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ext = filename.rsplit('.', 1)[1]
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else:
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ext = 'ico'
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# I have no idea why, but this headers are already sent.
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# self.send_header('Content-Length', len(response))
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# self.send_header('Content-type', 'image/' + ext)
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# self.end_headers()
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self.wfile.write(response)
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else:
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response = _('No favicon set.')
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handler.send_response(404)
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self.send_header('Content-type', 'text/plain')
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self.send_header('Content-Length', len(response))
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self.end_headers()
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if sys.version_info[0] >= 3:
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response = response.encode()
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self.wfile.write(response)
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http_servers = None
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def startServer():
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"""Starts the HTTP server. Shouldn't be called from other modules.
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The callback should be an instance of a child of SupyHTTPServerCallback."""
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global http_servers
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addresses4 = [(4, (x, configGroup.port()))
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for x in configGroup.hosts4().split(' ') if x != '']
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addresses6 = [(6, (x, configGroup.port()))
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for x in configGroup.hosts6().split(' ') if x != '']
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http_servers = []
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for protocol, address in (addresses4 + addresses6):
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server = SupyHTTPServer(address, protocol, SupyHTTPRequestHandler)
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Thread(target=server.serve_forever, name='HTTP Server').start()
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http_servers.append(server)
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log.info('Starting HTTP server: %s' % str(server))
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def stopServer():
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"""Stops the HTTP server. Should be run only from this module or from
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when the bot is dying (ie. from supybot.world)"""
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global http_servers
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if http_servers is not None:
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for server in http_servers:
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log.info('Stopping HTTP server: %s' % str(server))
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server.shutdown()
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server = None
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if configGroup.keepAlive():
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startServer()
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def hook(subdir, callback):
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"""Sets a callback for a given subdir."""
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if http_servers is None:
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startServer()
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assert isinstance(http_servers, list)
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for server in http_servers:
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server.hook(subdir, callback)
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def unhook(subdir):
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"""Unsets the callback assigned to the given subdir, and return it."""
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global http_servers
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assert isinstance(http_servers, list)
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for server in http_servers:
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callback = server.unhook(subdir)
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if len(server.callbacks) <= 0 and not configGroup.keepAlive():
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server.shutdown()
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http_servers.remove(server)
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