add hg and python

sys/lib/python/mercurial/hgweb/wsgicgi.py

@@ -0,0 +1,70 @@
+# 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, 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
+from mercurial import util
+
+def launch(application):
+    util.set_binary(sys.stdin)
+    util.set_binary(sys.stdout)
+
+    environ = dict(os.environ.iteritems())
+    environ.setdefault('PATH_INFO', '')
+    if '.cgi' in environ['PATH_INFO']:
+        environ['PATH_INFO'] = environ['PATH_INFO'].split('.cgi', 1)[1]
+
+    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').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)
+    for chunk in content:
+        write(chunk)