-import sys, os, threading, time, logging, select
+import sys, os, threading, time, logging, select, queue
from . import perf
log = logging.getLogger("ashd.serve")
def handle(self, request):
raise Exception()
def ckflush(self, req):
- raise Exception()
+ while len(req.buffer) > 0:
+ rls, wls, els = select.select([], [req], [req])
+ req.flush()
def close(self):
pass
raise ValueError("unknown handler argument: " + next(iter(args)))
return {}
+class single(handler):
+ def handle(self, req):
+ try:
+ env = req.mkenv()
+ with perf.request(env) as reqevent:
+ respiter = req.handlewsgi(env, req.startreq)
+ for data in respiter:
+ req.write(data)
+ if req.status:
+ reqevent.response([req.status, req.headers])
+ req.flushreq()
+ self.ckflush(req)
+ except closed:
+ pass
+ except:
+ log.error("exception occurred when handling request", exc_info=True)
+ finally:
+ req.close()
+
class freethread(handler):
- def __init__(self, *, max=None, **kw):
+ def __init__(self, *, max=None, timeout=None, **kw):
super().__init__(**kw)
self.current = set()
self.lk = threading.Lock()
self.tcond = threading.Condition(self.lk)
self.max = max
+ self.timeout = timeout
@classmethod
- def parseargs(cls, *, max=None, **args):
+ def parseargs(cls, *, max=None, abort=None, **args):
ret = super().parseargs(**args)
if max:
ret["max"] = int(max)
+ if abort:
+ ret["timeout"] = int(abort)
return ret
def handle(self, req):
with self.lk:
- while self.max is not None and len(self.current) >= self.max:
- self.tcond.wait()
+ if self.max is not None:
+ if self.timeout is not None:
+ now = start = time.time()
+ while len(self.current) >= self.max:
+ self.tcond.wait(start + self.timeout - now)
+ now = time.time()
+ if now - start > self.timeout:
+ os.abort()
+ else:
+ while len(self.current) >= self.max:
+ self.tcond.wait()
th = reqthread(target=self.run, args=[req])
th.start()
while th.is_alive() and th not in self.current:
self.tcond.wait()
- def ckflush(self, req):
- while len(req.buffer) > 0:
- rls, wls, els = select.select([], [req], [req])
- req.flush()
-
def run(self, req):
try:
th = threading.current_thread()
while not th in self.current:
self.pcond.wait()
- def ckflush(self, req):
- while len(req.buffer) > 0:
- rls, wls, els = select.select([], [req], [req])
- req.flush()
-
def _handle(self, req):
try:
env = req.mkenv()
self.rcond.notify_all()
self.pcond.wait(1)
-names = {"free": freethread,
- "pool": threadpool}
+class resplex(handler):
+ def __init__(self, **kw):
+ super().__init__(**kw)
+ self.current = set()
+ self.lk = threading.Lock()
+ self.cqueue = queue.Queue(5)
+ self.cnpipe = os.pipe()
+ self.rthread = reqthread(name="Response thread", target=self.handle2)
+ self.rthread.start()
+
+ def ckflush(self, req):
+ raise Exception("resplex handler does not support the write() function")
+
+ def handle(self, req):
+ reqthread(target=self.handle1, args=[req]).start()
+
+ def handle1(self, req):
+ try:
+ th = threading.current_thread()
+ with self.lk:
+ self.current.add(th)
+ try:
+ env = req.mkenv()
+ respobj = req.handlewsgi(env, req.startreq)
+ respiter = iter(respobj)
+ if not req.status:
+ log.error("request handler returned without calling start_request")
+ if hasattr(respiter, "close"):
+ respiter.close()
+ return
+ else:
+ self.cqueue.put((req, respiter))
+ os.write(self.cnpipe[1], b" ")
+ req = None
+ finally:
+ self.current.remove(th)
+ except closed:
+ pass
+ except:
+ log.error("exception occurred when handling request", exc_info=True)
+ finally:
+ if req is not None:
+ req.close()
+
+ def handle2(self):
+ try:
+ rp = self.cnpipe[0]
+ current = {}
+
+ def closereq(req):
+ respiter = current[req]
+ try:
+ if respiter is not None and hasattr(respiter, "close"):
+ respiter.close()
+ except:
+ log.error("exception occurred when closing iterator", exc_info=True)
+ try:
+ req.close()
+ except:
+ log.error("exception occurred when closing request", exc_info=True)
+ del current[req]
+ def ckiter(req):
+ respiter = current[req]
+ if respiter is not None:
+ rem = False
+ try:
+ data = next(respiter)
+ except StopIteration:
+ rem = True
+ req.flushreq()
+ except:
+ rem = True
+ log.error("exception occurred when iterating response", exc_info=True)
+ if not rem:
+ if data:
+ req.flushreq()
+ req.writedata(data)
+ else:
+ current[req] = None
+ try:
+ if hasattr(respiter, "close"):
+ respiter.close()
+ except:
+ log.error("exception occurred when closing iterator", exc_info=True)
+ respiter = None
+ if respiter is None and not req.buffer:
+ closereq(req)
+
+ while True:
+ bufl = list(req for req in current.keys() if req.buffer)
+ rls, wls, els = select.select([rp], bufl, [rp] + bufl)
+ if rp in rls:
+ ret = os.read(rp, 1024)
+ if not ret:
+ os.close(rp)
+ return
+ try:
+ while True:
+ req, respiter = self.cqueue.get(False)
+ current[req] = respiter
+ ckiter(req)
+ except queue.Empty:
+ pass
+ for req in wls:
+ try:
+ req.flush()
+ except closed:
+ closereq(req)
+ except:
+ log.error("exception occurred when writing response", exc_info=True)
+ closereq(req)
+ else:
+ if len(req.buffer) < 65536:
+ ckiter(req)
+ except:
+ log.critical("unexpected exception occurred in response handler thread", exc_info=True)
+ os.abort()
+
+ def close(self):
+ while True:
+ with self.lk:
+ if len(self.current) > 0:
+ th = next(iter(self.current))
+ else:
+ break
+ th.join()
+ os.close(self.cnpipe[1])
+ self.rthread.join()
+
+names = {"single": single,
+ "free": freethread,
+ "pool": threadpool,
+ "rplex": resplex}
def parsehspec(spec):
if ":" not in spec: