From db9d4aa502f88fa39de69142517b4ab5f1a0d5ab Mon Sep 17 00:00:00 2001 From: Helmut Grohne Date: Tue, 17 Apr 2007 18:38:13 +0200 Subject: added wsgitools.scgi.forkpool wsgitools.scgi is now known as wsgitools.scgi.asynchronous --- wsgitools/scgi.py | 201 ------------------------------------------------------ 1 file changed, 201 deletions(-) delete mode 100644 wsgitools/scgi.py (limited to 'wsgitools/scgi.py') diff --git a/wsgitools/scgi.py b/wsgitools/scgi.py deleted file mode 100644 index 51349a0..0000000 --- a/wsgitools/scgi.py +++ /dev/null @@ -1,201 +0,0 @@ -__all__ = [] - -import asyncore -import socket -import sys -try: - import cStringIO as StringIO -except ImportError: - import StringIO - -class SCGIConnection(asyncore.dispatcher): - """SCGI connection class used by WSGISCGIServer.""" - # maximum request size - MAX_REQUEST_SIZE = 65536 - # maximum post size - MAX_POST_SIZE = 8 << 20 - # read and write size - BLOCK_SIZE = 4096 - # connection states - NEW = 0*4 | 1 # connection established, waiting for request - HEADER = 1*4 | 1 # the request length was received, waiting for the rest - BODY = 2*4 | 1 # the request header was received, waiting for the body - REQ = 3*4 | 2 # request received, sending response - def __init__(self, server, connection, addr): - self.server = server # WSGISCGIServer instance - self.addr = addr # scgi client address - self.state = SCGIConnection.NEW # internal state - self.environ = {} # environment passed to wsgi app - self.reqlen = -1 # request length used in two different meanings - self.inbuff = "" # input buffer - self.outbuff = "" # output buffer - self.wsgihandler = None # wsgi application iterator - self.outheaders = () # headers to be sent - # () -> unset, (..,..) -> set, True -> sent - self.body = StringIO.StringIO() # request body - asyncore.dispatcher.__init__(self, connection) - - def _wsgi_headers(self): - return {"wsgi.version": (1, 0), - "wsgi.input": self.body, - "wsgi.errors": self.server.error, - "wsgi.url_scheme": "http", # TODO: this is wrong - "wsgi.multithread": False, - "wsgi.multiprocess": False, - "wsgi.run_once": False} - - def _try_send_headers(self): - if self.outheaders != True: - assert not self.outbuff - status, headers = self.outheaders - headdata = "".join(map("%s: %s\r\n".__mod__, headers)) - self.outbuff = "Status: %s\r\n%s\r\n" % (status, headdata) - self.outheaders = True - - def _wsgi_write(self, data): - assert self.state >= SCGIConnection.REQ - if data: - self._try_send_headers() - self.outbuff += data - - def readable(self): - """asyncore interface""" - return self.state & 1 == 1 - - def writable(self): - """asyncore interface""" - return self.state & 2 == 2 - - def handle_read(self): - """asyncore interface""" - data = self.recv(self.BLOCK_SIZE) - self.inbuff += data - if self.state == SCGIConnection.NEW: - if ':' in self.inbuff: - reqlen, self.inbuff = self.inbuff.split(':', 1) - if not reqlen.isdigit(): - self.close() - return # invalid request format - reqlen = long(reqlen) - if reqlen > self.MAX_REQUEST_SIZE: - self.close() - return # request too long - self.reqlen = reqlen - self.state = SCGIConnection.HEADER - elif len(self.inbuff) > self.MAX_REQUEST_SIZE: - self.close() - return # request too long - - if self.state == SCGIConnection.HEADER: - buff = self.inbuff[:self.reqlen] - remainder = self.inbuff[self.reqlen:] - - while buff.count('\0') >= 2: - key, value, buff = buff.split('\0', 2) - self.environ[key] = value - self.reqlen -= len(key) + len(value) + 2 - - self.inbuff = buff + remainder - - if self.reqlen == 0: - if self.inbuff.startswith(','): - self.inbuff = self.inbuff[1:] - self.reqlen = long(self.environ["CONTENT_LENGTH"]) - if self.reqlen > self.MAX_POST_SIZE: - self.close() - return - self.state = SCGIConnection.BODY - else: - self.close() - return # protocol violation - - if self.state == SCGIConnection.BODY: - if len(self.inbuff) >= self.reqlen: - self.body.write(self.inbuff[:self.reqlen]) - self.body.seek(0) - self.inbuff = "" - self.reqlen = 0 - self.environ.update(self._wsgi_headers()) - if "HTTP_CONTENT_TYPE" in self.environ: - self.environ["CONTENT_TYPE"] = \ - self.environ.pop("HTTP_CONTENT_TYPE") - if "HTTP_CONTENT_LENGTH" in self.environ: - del self.environ["HTTP_CONTENT_LENGTH"] # TODO: better way? - self.wsgihandler = iter(self.server.wsgiapp( - self.environ, self.start_response)) - self.state = SCGIConnection.REQ - else: - self.body.write(self.inbuff) - self.reqlen -= len(self.inbuff) - self.inbuff = "" - - def start_response(self, status, headers, exc_info=None): - if exc_info: - if self.outheaders == True: - try: - raise exc_info[0], exc_info[1], exc_info[2] - finally: - exc_info = None - assert self.outheaders != True # unsent - self.outheaders = (status, headers) - return self._wsgi_write - - def handle_write(self): - """asyncore interface""" - assert self.state >= SCGIConnection.REQ - if len(self.outbuff) < self.BLOCK_SIZE: - for data in self.wsgihandler: - self.outbuff += data - if len(self.outbuff) >= self.BLOCK_SIZE: - self._try_send_headers() - break - if len(self.outbuff) == 0: - if hasattr(self.wsgihandler, "close"): - self.wsgihandler.close() - self.close() - return - try: - sentbytes = self.send(self.outbuff[:self.BLOCK_SIZE]) - except socket.error: - if hasattr(self.wsgihandler, "close"): - self.wsgihandler.close() - self.close() - return - self.outbuff = self.outbuff[sentbytes:] - - def handle_close(self): - """asyncore interface""" - self.close() - -__all__.append("SCGIServer") -class SCGIServer(asyncore.dispatcher): - """SCGI Server for WSGI applications. It does not use multiple processes or - multiple threads.""" - def __init__(self, wsgiapp, port, interface="localhost", error=sys.stderr): - """wsgiapp is the wsgi application to be run. - port is an int representing the TCP port number to be used. - interface is a string specifying the network interface to bind which - defaults to "localhost" making the server inaccessible over - network. - error is a file-like object being passed as wsgi.error in the environ - parameter defaulting to stderr.""" - asyncore.dispatcher.__init__(self) - self.wsgiapp = wsgiapp - self.error = error - self.create_socket(socket.AF_INET, socket.SOCK_STREAM) - self.set_reuse_addr() - self.bind((interface, port)) - self.listen(5) - - def handle_accept(self): - """asyncore interface""" - ret = self.accept() - if ret is not None: - conn, addr = ret - SCGIConnection(self, conn, addr) - - def run(self): - """Runs the server. It will not return and you can invoke - asyncore.loop() instead achieving the same effect.""" - asyncore.loop() - -- cgit v1.2.3