python: Catch some previously uncaught errors in rplex handler.
[ashd.git] / python / scgi-wsgi
... / ...
CommitLineData
1#!/usr/bin/python
2
3import sys, os, getopt, logging
4import socket
5import ashd.scgi, ashd.perf, ashd.serve
6try:
7 import pdm.srv
8except:
9 pdm = None
10
11def usage(out):
12 out.write("usage: scgi-wsgi [-hAL] [-m PDM-SPEC] [-p MODPATH] [-T [HOST:]PORT] HANDLER-MODULE [ARGS...]\n")
13
14sk = None
15modwsgi_compat = False
16setlog = True
17opts, args = getopt.getopt(sys.argv[1:], "+hALp:T:m:")
18for o, a in opts:
19 if o == "-h":
20 usage(sys.stdout)
21 sys.exit(0)
22 elif o == "-p":
23 sys.path.insert(0, a)
24 elif o == "-L":
25 setlog = False
26 elif o == "-T":
27 sk = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
28 sk.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
29 p = a.rfind(":")
30 if p < 0:
31 bindhost = "localhost"
32 bindport = int(a)
33 else:
34 bindhost = a[:p]
35 bindport = int(a[p + 1:])
36 sk.bind((bindhost, bindport))
37 sk.listen(32)
38 elif o == "-A":
39 modwsgi_compat = True
40 elif o == "-m":
41 if pdm is not None:
42 pdm.srv.listen(a)
43if len(args) < 1:
44 usage(sys.stderr)
45 sys.exit(1)
46if setlog:
47 logging.basicConfig(format="scgi-wsgi(%(name)s): %(levelname)s: %(message)s")
48
49if sk is None:
50 # This is suboptimal, since the socket on stdin is not necessarily
51 # AF_UNIX, but Python does not seem to offer any way around it,
52 # that I can find.
53 sk = socket.fromfd(0, socket.AF_UNIX, socket.SOCK_STREAM)
54
55try:
56 handlermod = __import__(args[0], fromlist = ["dummy"])
57except ImportError, exc:
58 sys.stderr.write("scgi-wsgi: handler %s not found: %s\n" % (args[0], exc.message))
59 sys.exit(1)
60if not modwsgi_compat:
61 if not hasattr(handlermod, "wmain"):
62 sys.stderr.write("scgi-wsgi: handler %s has no `wmain' function\n" % args[0])
63 sys.exit(1)
64 handler = handlermod.wmain(*args[1:])
65else:
66 if not hasattr(handlermod, "application"):
67 sys.stderr.write("scgi-wsgi: handler %s has no `application' object\n" % args[0])
68 sys.exit(1)
69 handler = handlermod.application
70
71def mkenv(head, sk):
72 env = dict(head)
73 env["wsgi.version"] = 1, 0
74 if "HTTP_X_ASH_PROTOCOL" in env:
75 env["wsgi.url_scheme"] = env["HTTP_X_ASH_PROTOCOL"]
76 elif "HTTPS" in env:
77 env["wsgi.url_scheme"] = "https"
78 else:
79 env["wsgi.url_scheme"] = "http"
80 env["wsgi.input"] = sk
81 env["wsgi.errors"] = sys.stderr
82 env["wsgi.multithread"] = True
83 env["wsgi.multiprocess"] = False
84 env["wsgi.run_once"] = False
85 return env
86
87class reqthread(ashd.serve.wsgithread):
88 def __init__(self, sk):
89 super(reqthread, self).__init__()
90 self.bsk = sk.dup()
91 self.sk = self.bsk.makefile("r+")
92
93 def handlewsgi(self):
94 return handler(self.env, self.startreq)
95
96 def writehead(self, status, headers):
97 try:
98 self.sk.write("Status: %s\n" % status)
99 for nm, val in headers:
100 self.sk.write("%s: %s\n" % (nm, val))
101 self.sk.write("\n")
102 except IOError:
103 raise ashd.serve.closed()
104
105 def writedata(self, data):
106 try:
107 self.sk.write(data)
108 self.sk.flush()
109 except IOError:
110 raise ashd.serve.closed()
111
112 def handle(self):
113 head = ashd.scgi.readhead(self.sk)
114 self.env = mkenv(head, self.sk)
115 reqevent = ashd.perf.request(self.env)
116 exc = (None, None, None)
117 try:
118 super(reqthread, self).handle()
119 if self.status:
120 reqevent.response([self.status, self.headers])
121 except:
122 exc = sys.exc_info()
123 raise
124 finally:
125 reqevent.__exit__(*exc)
126
127 def run(self):
128 try:
129 super(reqthread, self).run()
130 finally:
131 self.sk.close()
132 self.bsk.close()
133
134while True:
135 nsk, addr = sk.accept()
136 try:
137 reqthread(nsk).start()
138 finally:
139 nsk.close()