|
|
# 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, incorporated herein by reference.
|
|
|
#
|
|
|
# This was originally copied from the public domain code at
|
|
|
# http://www.python.org/dev/peps/pep-0333/#the-server-gateway-side
|
|
|
|
|
|
import os, sys
|
|
|
|
|
|
def launch(application):
|
|
|
|
|
|
environ = dict(os.environ.items())
|
|
|
environ['wsgi.input'] = sys.stdin
|
|
|
environ['wsgi.errors'] = sys.stderr
|
|
|
environ['wsgi.version'] = (1,0)
|
|
|
environ['wsgi.multithread'] = False
|
|
|
environ['wsgi.multiprocess'] = True
|
|
|
environ['wsgi.run_once'] = True
|
|
|
|
|
|
if environ.get('HTTPS','off') in ('on','1'):
|
|
|
environ['wsgi.url_scheme'] = 'https'
|
|
|
else:
|
|
|
environ['wsgi.url_scheme'] = 'http'
|
|
|
|
|
|
headers_set = []
|
|
|
headers_sent = []
|
|
|
|
|
|
def write(data):
|
|
|
if not headers_set:
|
|
|
raise AssertionError("write() before start_response()")
|
|
|
|
|
|
elif not headers_sent:
|
|
|
# Before the first output, send the stored headers
|
|
|
status, response_headers = headers_sent[:] = headers_set
|
|
|
sys.stdout.write('Status: %s\r\n' % status)
|
|
|
for header in response_headers:
|
|
|
sys.stdout.write('%s: %s\r\n' % header)
|
|
|
sys.stdout.write('\r\n')
|
|
|
|
|
|
sys.stdout.write(data)
|
|
|
sys.stdout.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("Headers already set!")
|
|
|
|
|
|
headers_set[:] = [status,response_headers]
|
|
|
return write
|
|
|
|
|
|
result = application(environ, start_response)
|
|
|
try:
|
|
|
for data in result:
|
|
|
if data: # don't send headers until body appears
|
|
|
write(data)
|
|
|
if not headers_sent:
|
|
|
write('') # send headers now if body was empty
|
|
|
finally:
|
|
|
if hasattr(result,'close'):
|
|
|
result.close()
|
|
|
|
