view mercurial/hgweb/request.py @ 2874:4ec58b157265

refactor text diff/patch code.

rename commands.dodiff to patch.diff.
rename commands.doexport to patch.export.
move some functions from commands to new mercurial.cmdutil module.
turn list of diff options into mdiff.diffopts class.

patch.diff and patch.export now has clean api for call from 3rd party
python code.

# hgweb/request.py - An http request from either CGI or the standalone server.
#
# Copyright 21 May 2005 - (c) 2005 Jake Edge <[e-mail]>
# Copyright 2005, 2006 Matt Mackall <[e-mail]>
#
# This software may be used and distributed according to the terms
# of the GNU General Public License, incorporated herein by reference.

from mercurial.demandload import demandload
demandload(globals(), "socket sys cgi os 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 _wsgioutputfile(object):
    def __init__(self, request):
        self.request = request

    def write(self, data):
        self.request.write(data)
    def writelines(self, lines):
        for line in lines:
            self.write(line)
    def flush(self):
        return None
    def close(self):
        return None

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.out = _wsgioutputfile(self)
        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)

    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 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)