py3: finish porting iteritems() to pycompat and remove source transformer
This commit finishes porting .iteritems() to pycompat.iteritems()
for the mercurial package.
The translation of .iteritems() to .items() was the last conversion
performed by the source transformer. With the porting to pycompat
complete, we no longer have a need for the source transformer. So
the source transformer has been removed. Good riddance! The code
base is now compatible with Python 2 and Python 3.
For the record, as the person who introduced the source transformer,
it brings me joy to delete it. It accomplished its goal to facilitate
a port to Python 3 without overly burdening people on some painful
low-level differences between Python 2 and 3. It is unfortunate we
still have to wallpaper over many differences with the pycompat
shim. But it is what it is.
Differential Revision: https://phab.mercurial-scm.org/D7015
# hgweb/wsgicgi.py - CGI->WSGI translator
#
# Copyright 2006 Eric Hopper <hopper@omnifarious.org>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
#
# This was originally copied from the public domain code at
# http://www.python.org/dev/peps/pep-0333/#the-server-gateway-side
from __future__ import absolute_import
import os
from ..pycompat import getattr
from .. import pycompat
from ..utils import procutil
from . import common
def launch(application):
procutil.setbinary(procutil.stdin)
procutil.setbinary(procutil.stdout)
environ = dict(pycompat.iteritems(os.environ)) # re-exports
environ.setdefault(r'PATH_INFO', b'')
if environ.get(r'SERVER_SOFTWARE', r'').startswith(r'Microsoft-IIS'):
# IIS includes script_name in PATH_INFO
scriptname = environ[r'SCRIPT_NAME']
if environ[r'PATH_INFO'].startswith(scriptname):
environ[r'PATH_INFO'] = environ[r'PATH_INFO'][len(scriptname) :]
stdin = procutil.stdin
if environ.get(r'HTTP_EXPECT', r'').lower() == r'100-continue':
stdin = common.continuereader(stdin, procutil.stdout.write)
environ[r'wsgi.input'] = stdin
environ[r'wsgi.errors'] = procutil.stderr
environ[r'wsgi.version'] = (1, 0)
environ[r'wsgi.multithread'] = False
environ[r'wsgi.multiprocess'] = True
environ[r'wsgi.run_once'] = True
if environ.get(r'HTTPS', r'off').lower() in (r'on', r'1', r'yes'):
environ[r'wsgi.url_scheme'] = r'https'
else:
environ[r'wsgi.url_scheme'] = r'http'
headers_set = []
headers_sent = []
out = procutil.stdout
def write(data):
if not headers_set:
raise AssertionError(b"write() before start_response()")
elif not headers_sent:
# Before the first output, send the stored headers
status, response_headers = headers_sent[:] = headers_set
out.write(b'Status: %s\r\n' % pycompat.bytesurl(status))
for hk, hv in response_headers:
out.write(
b'%s: %s\r\n'
% (pycompat.bytesurl(hk), pycompat.bytesurl(hv))
)
out.write(b'\r\n')
out.write(data)
out.flush()
def start_response(status, response_headers, exc_info=None):
if exc_info:
try:
if headers_sent:
# Re-raise original exception if headers sent
raise exc_info[0](exc_info[1], exc_info[2])
finally:
exc_info = None # avoid dangling circular ref
elif headers_set:
raise AssertionError(b"Headers already set!")
headers_set[:] = [status, response_headers]
return write
content = application(environ, start_response)
try:
for chunk in content:
write(chunk)
if not headers_sent:
write(b'') # send headers now if body was empty
finally:
getattr(content, 'close', lambda: None)()