# hgweb/request.py - An http request from either CGI or the standalone server.

#

# Copyright 21 May 2005 - (c) 2005 Jake Edge <jake@edge2.net>

# Copyright 2005, 2006 Matt Mackall <mpm@selenic.com>

#

# This software may be used and distributed according to the terms

# of the GNU General Public License, incorporated herein by reference.

import socket, cgi, errno

from mercurial.i18n import gettext as _

class wsgiapplication(object):

    def __init__(self, destmaker):

        self.destmaker = destmaker

    def __call__(self, wsgienv, start_response):

        return _wsgirequest(self.destmaker(), wsgienv, start_response)

class _wsgirequest(object):

    def __init__(self, destination, wsgienv, start_response):

        version = wsgienv['wsgi.version']

        if (version < (1, 0)) or (version >= (2, 0)):

            raise RuntimeError("Unknown and unsupported WSGI version %d.%d"

                               % version)

        self.inp = wsgienv['wsgi.input']

        self.server_write = None

        self.err = wsgienv['wsgi.errors']

        self.threaded = wsgienv['wsgi.multithread']

        self.multiprocess = wsgienv['wsgi.multiprocess']

        self.run_once = wsgienv['wsgi.run_once']

        self.env = wsgienv

        self.form = cgi.parse(self.inp, self.env, keep_blank_values=1)

        self.start_response = start_response

        self.headers = []

        destination.run_wsgi(self)

    out = property(lambda self: self)

    def __iter__(self):

        return iter([])

    def read(self, count=-1):

        return self.inp.read(count)

    def write(self, *things):

        for thing in things:

            if hasattr(thing, "__iter__"):

                for part in thing:

                    self.write(part)

            else:

                thing = str(thing)

                if self.server_write is None:

                    if not self.headers:

                        raise RuntimeError("request.write called before headers sent (%s)." % thing)

                    self.server_write = self.start_response('200 Script output follows',

                                                            self.headers)

                    self.start_response = None

                    self.headers = None

                try:

                    self.server_write(thing)

                except socket.error, inst:

                    if inst[0] != errno.ECONNRESET:

                        raise

    def writelines(self, lines):

        for line in lines:

            self.write(line)

    def flush(self):

        return None

    def close(self):

        return None

    def header(self, headers=[('Content-type','text/html')]):

        self.headers.extend(headers)

    def httphdr(self, type, filename=None, length=0, headers={}):

        headers = headers.items()

        headers.append(('Content-type', type))

        if filename:

            headers.append(('Content-disposition', 'attachment; filename=%s' %

                            filename))

        if length:

            headers.append(('Content-length', str(length)))

        self.header(headers)