#!/usr/bin/env python

"""message.py - HTTP message constructs."""

__license__ = """
Copyright (c) 2001-2004 Mark Nottingham <mnot@pobox.com>

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
"""

__version__ = "0.71"


class Representation:
    "A Web representation."
    def __init__(self):
        self.body = None            # entity body
        self.headers = {}           # entity headers


class Message:
    "Abstract class for an HTTP message."
    proto_version = None            # protocol version
    has_body = None                 # send a body with the message?
    
    def __init__(self, representation=None):
        if representation != None:
            self.representation = representation
        else:
            self.representation = Representation()
        self.headers = {}           # message headers

class Request(Message):
    "HTTP Request."
    method = None              # request method
    uri = None                 # request URI
        
    def __str__(self):
        o = []
        o.append("%s %s %s" % self.method, self.uri, self.proto_version)
        o.append(str(self.headers))
        o.append('')
        if self.representation.body != None:
            o.append(self.representation.body)
        return o.join("\r\n")

class Response(Message):
    "HTTP Response."
    status_code = None               # response status code
    status_phrase = None             # response status phrase

    def __str__(self):
        o = []
        o.append("%s %s %s" % (self.proto_version, self.status_code, self.status_phrase))
        o.append(str(self.headers))
        o.append('')
        if self.has_body and self.representation.body != None:
            o.append(self.representation.body)
        return o.join("\r\n")