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131 lines
4.0 KiB
Python
131 lines
4.0 KiB
Python
# -*- coding: utf-8 -
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#
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# This file is part of gunicorn released under the MIT license.
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# See the NOTICE for more information.
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import errno
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import os
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import select
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import socket
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import traceback
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from gunicorn import http
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from gunicorn.http.tee import UnexpectedEOF
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from gunicorn import util
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from gunicorn.worker import Worker
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ALREADY_HANDLED = object()
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class KeepaliveResponse(http.Response):
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def default_headers(self):
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if self.req.parser.should_close:
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connection_hdr = "close"
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else:
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connection_hdr = "keep-alive"
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return [
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"HTTP/1.1 %s\r\n" % self.status,
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"Server: %s\r\n" % self.version,
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"Date: %s\r\n" % util.http_date(),
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"Connection: %s\r\n" % connection_hdr
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]
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class KeepaliveRequest(http.Request):
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RESPONSE_CLASS = KeepaliveResponse
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def read(self):
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ret = select.select([self.socket], [], [], self.conf.keepalive)
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if not ret[0]:
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return
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try:
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return super(KeepaliveRequest, self).read()
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except socket.error, e:
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if e[0] == 54:
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return
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raise
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class KeepaliveWorker(Worker):
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def __init__(self, *args, **kwargs):
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Worker.__init__(self, *args, **kwargs)
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self.nb_connections = 0
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self.worker_connections = self.conf.worker_connections
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def handle(self, client, addr):
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self.nb_connections += 1
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try:
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self.init_sock(client)
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while True:
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req = KeepaliveRequest(client, addr, self.address, self.conf)
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try:
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environ = req.read()
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if not environ or not req.parser.headers:
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return
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respiter = self.app(environ, req.start_response)
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if respiter == ALREADY_HANDLED:
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break
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for item in respiter:
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req.response.write(item)
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req.response.close()
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if hasattr(respiter, "close"):
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respiter.close()
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if req.parser.should_close:
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break
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except Exception, e:
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#Only send back traceback in HTTP in debug mode.
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if not self.debug:
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raise
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util.write_error(client, traceback.format_exc())
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break
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except socket.error, e:
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if e[0] != errno.EPIPE:
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self.log.exception("Error processing request.")
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else:
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self.log.warn("Ignoring EPIPE")
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except UnexpectedEOF:
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self.log.exception("remote closed the connection unexpectedly.")
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except Exception, e:
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self.log.exception("Error processing request.")
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try:
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# Last ditch attempt to notify the client of an error.
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mesg = "HTTP/1.0 500 Internal Server Error\r\n\r\n"
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util.write_nonblock(client, mesg)
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except:
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pass
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return
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finally:
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self.nb_connections -= 1
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util.close(client)
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def run(self):
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self.init_process()
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self.socket.setblocking(1)
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while self.alive:
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self.notify()
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# If our parent changed then we shut down.
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if self.ppid != os.getppid():
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self.log.info("Parent changed, shutting down: %s" % self)
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return
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if self.nb_connections > self.worker_connections:
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continue
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try:
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ret = select.select([self.socket], [], [], 1)
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if ret[0]:
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self.accept()
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except select.error, e:
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if e[0] == errno.EINTR:
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continue
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if e[0] == errno.EBADF:
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continue
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raise
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except KeyboardInterrupt :
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return
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