2012-05-07 09:34:01 +00:00
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import cStringIO, urllib, time, sys, traceback
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2012-04-23 21:43:14 +00:00
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import version, flow
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def date_time_string():
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"""Return the current date and time formatted for a message header."""
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WEEKS = ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']
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MONTHS = [None,
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'Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun',
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'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']
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now = time.time()
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year, month, day, hh, mm, ss, wd, y, z = time.gmtime(now)
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s = "%s, %02d %3s %4d %02d:%02d:%02d GMT" % (
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WEEKS[wd],
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day, MONTHS[month], year,
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hh, mm, ss)
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return s
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class WSGIAdaptor:
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def __init__(self, app, domain, port):
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self.app, self.domain, self.port = app, domain, port
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def make_environ(self, request, errsoc):
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if '?' in request.path:
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path_info, query = request.path.split('?', 1)
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else:
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path_info = request.path
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query = ''
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environ = {
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'wsgi.version': (1, 0),
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'wsgi.url_scheme': request.scheme,
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'wsgi.input': cStringIO.StringIO(request.content),
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'wsgi.errors': errsoc,
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'wsgi.multithread': True,
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'wsgi.multiprocess': False,
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'wsgi.run_once': False,
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'SERVER_SOFTWARE': version.NAMEVERSION,
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'REQUEST_METHOD': request.method,
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'SCRIPT_NAME': '',
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'PATH_INFO': urllib.unquote(path_info),
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'QUERY_STRING': query,
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'CONTENT_TYPE': request.headers.get('Content-Type', [''])[0],
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'CONTENT_LENGTH': request.headers.get('Content-Length', [''])[0],
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'SERVER_NAME': self.domain,
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'SERVER_PORT': self.port,
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# FIXME: We need to pick up the protocol read from the request.
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'SERVER_PROTOCOL': "HTTP/1.1",
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}
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if request.client_conn.address:
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environ["REMOTE_ADDR"], environ["REMOTE_PORT"] = request.client_conn.address
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for key, value in request.headers.items():
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key = 'HTTP_' + key.upper().replace('-', '_')
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if key not in ('HTTP_CONTENT_TYPE', 'HTTP_CONTENT_LENGTH'):
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environ[key] = value
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return environ
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2012-05-07 09:34:01 +00:00
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def error_page(self, soc, headers_sent, s):
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2012-04-27 03:56:42 +00:00
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"""
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Make a best-effort attempt to write an error page. If headers are
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already sent, we just bung the error into the page.
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"""
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c = """
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<html>
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<h1>Internal Server Error</h1>
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2012-05-07 09:34:01 +00:00
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<pre>%s"</pre>
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2012-04-27 03:56:42 +00:00
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</html>
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2012-05-07 09:34:01 +00:00
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"""%s
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2012-04-27 03:56:42 +00:00
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if not headers_sent:
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2012-05-07 09:34:01 +00:00
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soc.write("HTTP/1.1 500 Internal Server Error\r\n")
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2012-04-27 03:56:42 +00:00
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soc.write("Content-Type: text/html\r\n")
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soc.write("Content-Length: %s\r\n"%len(c))
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soc.write("\r\n")
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soc.write(c)
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2012-04-23 21:43:14 +00:00
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def serve(self, request, soc):
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state = dict(
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response_started = False,
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headers_sent = False,
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status = None,
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headers = None
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)
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def write(data):
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if not state["headers_sent"]:
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soc.write("HTTP/1.1 %s\r\n"%state["status"])
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h = state["headers"]
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if 'server' not in h:
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h["Server"] = [version.NAMEVERSION]
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if 'date' not in h:
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h["Date"] = [date_time_string()]
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soc.write(str(h))
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soc.write("\r\n")
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state["headers_sent"] = True
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soc.write(data)
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soc.flush()
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def start_response(status, headers, exc_info=None):
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if exc_info:
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try:
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if state["headers_sent"]:
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raise exc_info[0], exc_info[1], exc_info[2]
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finally:
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exc_info = None
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elif state["status"]:
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raise AssertionError('Response already started')
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state["status"] = status
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state["headers"] = flow.ODictCaseless(headers)
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return write
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errs = cStringIO.StringIO()
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try:
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dataiter = self.app(self.make_environ(request, errs), start_response)
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for i in dataiter:
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write(i)
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if not state["headers_sent"]:
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write("")
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except Exception, v:
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try:
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2012-05-07 09:34:01 +00:00
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s = traceback.format_exc()
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self.error_page(soc, state["headers_sent"], s)
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2012-06-09 01:42:43 +00:00
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except Exception, v: # pragma: no cover
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pass # pragma: no cover
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2012-04-23 21:43:14 +00:00
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return errs.getvalue()
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2012-04-24 02:58:18 +00:00
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2012-04-23 21:43:14 +00:00
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class AppRegistry:
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def __init__(self):
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self.apps = {}
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def add(self, app, domain, port):
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2012-04-24 02:58:18 +00:00
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"""
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Add a WSGI app to the registry, to be served for requests to the
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specified domain, on the specified port.
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"""
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2012-04-23 21:43:14 +00:00
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self.apps[(domain, port)] = WSGIAdaptor(app, domain, port)
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def get(self, request):
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"""
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Returns an WSGIAdaptor instance if request matches an app, or None.
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"""
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return self.apps.get((request.host, request.port), None)
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