| # 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 |
| |
| import os, sys |
| from mercurial import util |
| from mercurial.hgweb import common |
| |
| def launch(application): |
| util.setbinary(sys.stdin) |
| util.setbinary(sys.stdout) |
| |
| environ = dict(os.environ.iteritems()) |
| environ.setdefault('PATH_INFO', '') |
| if environ.get('SERVER_SOFTWARE', '').startswith('Microsoft-IIS'): |
| # IIS includes script_name in PATH_INFO |
| scriptname = environ['SCRIPT_NAME'] |
| if environ['PATH_INFO'].startswith(scriptname): |
| environ['PATH_INFO'] = environ['PATH_INFO'][len(scriptname):] |
| |
| stdin = sys.stdin |
| if environ.get('HTTP_EXPECT', '').lower() == '100-continue': |
| stdin = common.continuereader(stdin, sys.stdout.write) |
| |
| environ['wsgi.input'] = 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').lower() in ('on', '1', 'yes'): |
| environ['wsgi.url_scheme'] = 'https' |
| else: |
| environ['wsgi.url_scheme'] = 'http' |
| |
| headers_set = [] |
| headers_sent = [] |
| out = sys.stdout |
| |
| 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 |
| out.write('Status: %s\r\n' % status) |
| for header in response_headers: |
| out.write('%s: %s\r\n' % header) |
| out.write('\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("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('') # send headers now if body was empty |
| finally: |
| getattr(content, 'close', lambda : None)() |