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178 lines
6.0 KiB
Python
178 lines
6.0 KiB
Python
# Copyright (c) 2004-2009 Sergey Lyubka
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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# THE SOFTWARE.
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#
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# $Id: mongoose.py 471 2009-08-30 14:30:21Z valenok $
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"""
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This module provides python binding for the Mongoose web server.
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There are two classes defined:
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Connection: - wraps all functions that accept struct mg_connection pointer
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as first argument
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Mongoose: wraps all functions that accept struct mg_context pointer as
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first argument. All valid option names, settable via mg_set_option(),
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are settable/gettable as the attributes of the Mongoose object.
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In addition to those, two attributes are available:
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'version': string, contains server version
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'options': array of all known options.
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Creating Mongoose object automatically starts server, deleting object
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automatically stops it. There is no need to call mg_start() or mg_stop().
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"""
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import ctypes
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import os
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class mg_header(ctypes.Structure):
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"""A wrapper for struct mg_header."""
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_fields_ = [
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('name', ctypes.c_char_p),
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('value', ctypes.c_char_p),
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]
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class mg_request_info(ctypes.Structure):
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"""A wrapper for struct mg_request_info."""
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_fields_ = [
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('request_method', ctypes.c_char_p),
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('uri', ctypes.c_char_p),
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('http_version', ctypes.c_char_p),
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('query_string', ctypes.c_char_p),
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('post_data', ctypes.c_char_p),
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('remote_user', ctypes.c_char_p),
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('remote_ip', ctypes.c_long),
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('remote_port', ctypes.c_int),
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('post_data_len', ctypes.c_int),
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('status_code', ctypes.c_int),
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('num_headers', ctypes.c_int),
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('http_headers', mg_header * 64),
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]
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class Connection(object):
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"""A wrapper class for all functions that take
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struct mg_connection * as the first argument."""
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def __init__(self, mongoose, connection):
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self.m = mongoose
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self.conn = connection
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def get_header(self, name):
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val = self.m.dll.mg_get_header(self.conn, name)
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return ctypes.c_char_p(val).value
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def get_var(self, name):
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var = None
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pointer = self.m.dll.mg_get_var(self.conn, name)
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if pointer:
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# Make a copy and free() the returned pointer
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var = '' + ctypes.c_char_p(pointer).value
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self.m.dll.mg_free(pointer)
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return var
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def printf(self, fmt, *args):
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val = self.m.dll.mg_printf(self.conn, fmt, *args)
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return ctypes.c_int(val).value
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def write(self, data):
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val = self.m.dll.mg_write(self.conn, data, len(data))
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return ctypes.c_int(val).value
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class Mongoose(object):
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"""A wrapper class for Mongoose shared library."""
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# Exceptions for __setattr__ and __getattr__: these attributes
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# must not be treated as Mongoose options
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_private = ('dll', 'ctx', 'version', 'callbacks')
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def __init__(self, **kwargs):
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dll_extension = os.name == 'nt' and 'dll' or 'so'
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self.dll = ctypes.CDLL('_mongoose.%s' % dll_extension)
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start = self.dll.mg_start
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self.ctx = ctypes.c_voidp(self.dll.mg_start()).value
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self.version = ctypes.c_char_p(self.dll.mg_version()).value
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self.callbacks = []
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for name, value in kwargs.iteritems():
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self.__setattr__(name, value)
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def __setattr__(self, name, value):
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"""Set Mongoose option. Raises ValueError in option not set."""
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if name in self._private:
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object.__setattr__(self, name, value)
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else:
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code = self.dll.mg_set_option(self.ctx, name, value)
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if code != 1:
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raise ValueError('Cannot set option [%s] '
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'to [%s]' % (name, value))
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def __getattr__(self, name):
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"""Get Mongoose option."""
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if name in self._private:
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return object.__getattr__(self, name)
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else:
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val = self.dll.mg_get_option(self.ctx, name)
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return ctypes.c_char_p(val).value
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def __del__(self):
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"""Destructor, stop Mongoose instance."""
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self.dll.mg_stop(self.ctx)
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def _make_c_callback(self, python_callback):
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"""Return C callback from given Python callback."""
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# Create a closure that will be called by the shared library.
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def _cb(connection, request_info, user_data):
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# Wrap connection pointer into the connection
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# object and call Python callback
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conn = Connection(self, connection)
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python_callback(conn, request_info.contents, user_data)
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# Convert the closure into C callable object
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c_callback = ctypes.CFUNCTYPE(ctypes.c_voidp, ctypes.c_voidp,
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ctypes.POINTER(mg_request_info), ctypes.c_voidp)(_cb)
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# Store created callback in the list, so it is kept alive
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# during context lifetime. Otherwise, python can garbage
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# collect it, and C code will crash trying to call it.
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self.callbacks.append(c_callback)
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return c_callback
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def set_uri_callback(self, uri_regex, python_callback, user_data):
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self.dll.mg_set_uri_callback(self.ctx, uri_regex,
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self._make_c_callback(python_callback), user_data)
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def set_auth_callback(self, uri_regex, python_callback, user_data):
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self.dll.mg_set_auth_callback(self.ctx, uri_regex,
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self._make_c_callback(python_callback), user_data)
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def set_error_callback(self, error_code, python_callback, user_data):
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self.dll.mg_set_error_callback(self.ctx, error_code,
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self._make_c_callback(python_callback), user_data)
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def set_log_callback(self, python_callback):
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self.dll.mg_set_log_callback(self.ctx,
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self._make_c_callback(python_callback))
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