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111 lines
3.6 KiB
Python
111 lines
3.6 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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#
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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, util
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from gunicorn.http.tee import UnexpectedEOF
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from gunicorn.workers.base import Worker
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class SyncWorker(Worker):
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def run(self):
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self.nr = 0
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# self.socket appears to lose its blocking status after
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# we fork in the arbiter. Reset it here.
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self.socket.setblocking(0)
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while self.alive:
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self.nr = 0
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self.notify()
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# Accept a connection. If we get an error telling us
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# that no connection is waiting we fall down to the
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# select which is where we'll wait for a bit for new
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# workers to come give us some love.
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try:
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client, addr = self.socket.accept()
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client.setblocking(1)
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util.close_on_exec(client)
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self.handle(client, addr)
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self.nr += 1
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except socket.error, e:
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if e[0] not in (errno.EAGAIN, errno.ECONNABORTED):
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raise
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# Keep processing clients until no one is waiting. This
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# prevents the need to select() for every client that we
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# process.
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if self.nr > 0:
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continue
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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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try:
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self.notify()
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ret = select.select([self.socket], [], self.PIPE, self.timeout)
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if ret[0]:
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continue
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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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if self.nr < 0:
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continue
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else:
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return
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raise
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def handle(self, client, addr):
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try:
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self.handle_request(client, addr)
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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("Client 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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finally:
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util.close(client)
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def handle_request(self, client, addr):
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req = http.Request(client, addr, self.address, self.cfg)
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try:
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environ = req.read()
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if not environ or not req.parser.status_line:
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return
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respiter = self.app(environ, req.start_response)
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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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except socket.error:
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raise
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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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return
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