doc: Fixed typo.
[ashd.git] / python / ashd-wsgi
... / ...
CommitLineData
1#!/usr/bin/python
2
3import sys, os, getopt, socket, logging, time, signal
4import ashd.util, ashd.serve
5try:
6 import pdm.srv
7except:
8 pdm = None
9
10def usage(out):
11 out.write("usage: ashd-wsgi [-hAL] [-m PDM-SPEC] [-p MODPATH] [-t REQUEST-HANDLER[:PAR[=VAL](,PAR[=VAL])...]] HANDLER-MODULE [ARGS...]\n")
12
13hspec = "free", {}
14modwsgi_compat = False
15setlog = True
16opts, args = getopt.getopt(sys.argv[1:], "+hALp:t:l:m:")
17for o, a in opts:
18 if o == "-h":
19 usage(sys.stdout)
20 sys.exit(0)
21 elif o == "-p":
22 sys.path.insert(0, a)
23 elif o == "-L":
24 setlog = False
25 elif o == "-A":
26 modwsgi_compat = True
27 elif o == "-l":
28 hspec = "free", {"max": a, "abort": "10"}
29 elif o == "-t":
30 hspec = ashd.serve.parsehspec(a)
31 elif o == "-m":
32 if pdm is not None:
33 pdm.srv.listen(a)
34if len(args) < 1:
35 usage(sys.stderr)
36 sys.exit(1)
37if setlog:
38 logging.basicConfig(format="ashd-wsgi(%(name)s): %(levelname)s: %(message)s")
39log = logging.getLogger("ashd-wsgi")
40
41try:
42 handlermod = __import__(args[0], fromlist = ["dummy"])
43except ImportError, exc:
44 sys.stderr.write("ashd-wsgi: handler %s not found: %s\n" % (args[0], exc.message))
45 sys.exit(1)
46if not modwsgi_compat:
47 if not hasattr(handlermod, "wmain"):
48 sys.stderr.write("ashd-wsgi: handler %s has no `wmain' function\n" % args[0])
49 sys.exit(1)
50 handler = handlermod.wmain(*args[1:])
51else:
52 if not hasattr(handlermod, "application"):
53 sys.stderr.write("ashd-wsgi: handler %s has no `application' object\n" % args[0])
54 sys.exit(1)
55 handler = handlermod.application
56
57cwd = os.getcwd()
58def absolutify(path):
59 if path[0] != '/':
60 return os.path.join(cwd, path)
61 return path
62
63def unquoteurl(url):
64 buf = ""
65 i = 0
66 while i < len(url):
67 c = url[i]
68 i += 1
69 if c == '%':
70 if len(url) >= i + 2:
71 c = 0
72 if '0' <= url[i] <= '9':
73 c |= (ord(url[i]) - ord('0')) << 4
74 elif 'a' <= url[i] <= 'f':
75 c |= (ord(url[i]) - ord('a') + 10) << 4
76 elif 'A' <= url[i] <= 'F':
77 c |= (ord(url[i]) - ord('A') + 10) << 4
78 else:
79 raise ValueError("Illegal URL escape character")
80 if '0' <= url[i + 1] <= '9':
81 c |= ord(url[i + 1]) - ord('0')
82 elif 'a' <= url[i + 1] <= 'f':
83 c |= ord(url[i + 1]) - ord('a') + 10
84 elif 'A' <= url[i + 1] <= 'F':
85 c |= ord(url[i + 1]) - ord('A') + 10
86 else:
87 raise ValueError("Illegal URL escape character")
88 buf += chr(c)
89 i += 2
90 else:
91 raise ValueError("Incomplete URL escape character")
92 else:
93 buf += c
94 return buf
95
96def mkenv(req):
97 env = {}
98 env["wsgi.version"] = 1, 0
99 for key, val in req.headers:
100 env["HTTP_" + key.upper().replace("-", "_")] = val
101 env["SERVER_SOFTWARE"] = "ashd-wsgi/1"
102 env["GATEWAY_INTERFACE"] = "CGI/1.1"
103 env["SERVER_PROTOCOL"] = req.ver
104 env["REQUEST_METHOD"] = req.method
105 env["REQUEST_URI"] = req.url
106 name = req.url
107 p = name.find('?')
108 if p >= 0:
109 env["QUERY_STRING"] = name[p + 1:]
110 name = name[:p]
111 else:
112 env["QUERY_STRING"] = ""
113 if name[-len(req.rest):] == req.rest:
114 # This is the same hack used in call*cgi.
115 name = name[:-len(req.rest)]
116 try:
117 pi = unquoteurl(req.rest)
118 except:
119 pi = req.rest
120 if name == '/':
121 # This seems to be normal CGI behavior, but see callcgi.c for
122 # details.
123 pi = "/" + pi
124 name = ""
125 env["SCRIPT_NAME"] = name
126 env["PATH_INFO"] = pi
127 if "Host" in req: env["SERVER_NAME"] = req["Host"]
128 if "X-Ash-Server-Address" in req: env["SERVER_ADDR"] = req["X-Ash-Server-Address"]
129 if "X-Ash-Server-Port" in req: env["SERVER_PORT"] = req["X-Ash-Server-Port"]
130 if "X-Ash-Protocol" in req and req["X-Ash-Protocol"] == "https": env["HTTPS"] = "on"
131 if "X-Ash-Address" in req: env["REMOTE_ADDR"] = req["X-Ash-Address"]
132 if "X-Ash-Port" in req: env["REMOTE_PORT"] = req["X-Ash-Port"]
133 if "Content-Type" in req:
134 env["CONTENT_TYPE"] = req["Content-Type"]
135 # The CGI specification does not strictly require this, but
136 # many actualy programs and libraries seem to.
137 del env["HTTP_CONTENT_TYPE"]
138 if "Content-Length" in req:
139 env["CONTENT_LENGTH"] = req["Content-Length"]
140 del env["HTTP_CONTENT_LENGTH"]
141 if "X-Ash-File" in req: env["SCRIPT_FILENAME"] = absolutify(req["X-Ash-File"])
142 if "X-Ash-Protocol" in req: env["wsgi.url_scheme"] = req["X-Ash-Protocol"]
143 env["wsgi.input"] = req.sk
144 env["wsgi.errors"] = sys.stderr
145 env["wsgi.multithread"] = True
146 env["wsgi.multiprocess"] = False
147 env["wsgi.run_once"] = False
148 return env
149
150class request(ashd.serve.wsgirequest):
151 def __init__(self, bkreq, **kw):
152 super(request, self).__init__(**kw)
153 self.bkreq = bkreq.dup()
154
155 def mkenv(self):
156 return mkenv(self.bkreq)
157
158 def handlewsgi(self, env, startreq):
159 return handler(env, startreq)
160
161 def fileno(self):
162 return self.bkreq.bsk.fileno()
163
164 def writehead(self, status, headers):
165 w = self.buffer.extend
166 w("HTTP/1.1 %s\n" % status)
167 for nm, val in headers:
168 w("%s: %s\n" % (nm, val))
169 w("\n")
170
171 def flush(self):
172 try:
173 ret = self.bkreq.bsk.send(self.buffer, socket.MSG_DONTWAIT)
174 self.buffer[:ret] = ""
175 except IOError:
176 raise ashd.serve.closed()
177
178 def close(self):
179 self.bkreq.close()
180
181def handle(req):
182 reqhandler.handle(request(bkreq=req, handler=reqhandler))
183
184if hspec[0] not in ashd.serve.names:
185 sys.stderr.write("ashd-wsgi: no such request handler: %s\n" % hspec[0])
186 sys.exit(1)
187hclass = ashd.serve.names[hspec[0]]
188try:
189 hargs = hclass.parseargs(**hspec[1])
190except ValueError as exc:
191 sys.stderr.write("ashd-wsgi: %s\n" % exc)
192 sys.exit(1)
193
194def sigterm(sig, frame):
195 socket.fromfd(0, socket.AF_UNIX, socket.SOCK_SEQPACKET).shutdown(socket.SHUT_RDWR) # :P
196for signum in [signal.SIGINT, signal.SIGTERM]:
197 signal.signal(signum, sigterm)
198
199reqhandler = hclass(**hargs)
200try:
201 ashd.util.serveloop(handle)
202finally:
203 reqhandler.close()