python: Added PDM support in scgi-wsgi{,3}.
[ashd.git] / python3 / ashd-wsgi3
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CommitLineData
1#!/usr/bin/python3
2
3import sys, os, getopt, threading, logging, time, locale, collections
4import ashd.proto, ashd.util, ashd.perf, ashd.serve
5try:
6 import pdm.srv
7except:
8 pdm = None
9
10def usage(out):
11 out.write("usage: ashd-wsgi3 [-hAL] [-m PDM-SPEC] [-p MODPATH] [-l REQLIMIT] HANDLER-MODULE [ARGS...]\n")
12
13reqlimit = 0
14modwsgi_compat = False
15setlog = True
16opts, args = getopt.getopt(sys.argv[1:], "+hALp: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 reqlimit = int(a)
29 elif o == "-m":
30 if pdm is not None:
31 pdm.srv.listen(a)
32if len(args) < 1:
33 usage(sys.stderr)
34 sys.exit(1)
35if setlog:
36 logging.basicConfig(format="ashd-wsgi3(%(name)s): %(levelname)s: %(message)s")
37log = logging.getLogger("ashd-wsgi3")
38
39try:
40 handlermod = __import__(args[0], fromlist = ["dummy"])
41except ImportError as exc:
42 sys.stderr.write("ashd-wsgi3: handler %s not found: %s\n" % (args[0], exc.args[0]))
43 sys.exit(1)
44if not modwsgi_compat:
45 if not hasattr(handlermod, "wmain"):
46 sys.stderr.write("ashd-wsgi3: handler %s has no `wmain' function\n" % args[0])
47 sys.exit(1)
48 handler = handlermod.wmain(*args[1:])
49else:
50 if not hasattr(handlermod, "application"):
51 sys.stderr.write("ashd-wsgi3: handler %s has no `application' object\n" % args[0])
52 sys.exit(1)
53 handler = handlermod.application
54
55cwd = os.getcwd()
56def absolutify(path):
57 if path[0] != '/':
58 return os.path.join(cwd, path)
59 return path
60
61def unquoteurl(url):
62 buf = bytearray()
63 i = 0
64 while i < len(url):
65 c = url[i]
66 i += 1
67 if c == ord(b'%'):
68 if len(url) >= i + 2:
69 c = 0
70 if ord(b'0') <= url[i] <= ord(b'9'):
71 c |= (url[i] - ord(b'0')) << 4
72 elif ord(b'a') <= url[i] <= ord(b'f'):
73 c |= (url[i] - ord(b'a') + 10) << 4
74 elif ord(b'A') <= url[i] <= ord(b'F'):
75 c |= (url[i] - ord(b'A') + 10) << 4
76 else:
77 raise ValueError("Illegal URL escape character")
78 if ord(b'0') <= url[i + 1] <= ord(b'9'):
79 c |= url[i + 1] - ord('0')
80 elif ord(b'a') <= url[i + 1] <= ord(b'f'):
81 c |= url[i + 1] - ord(b'a') + 10
82 elif ord(b'A') <= url[i + 1] <= ord(b'F'):
83 c |= url[i + 1] - ord(b'A') + 10
84 else:
85 raise ValueError("Illegal URL escape character")
86 buf.append(c)
87 i += 2
88 else:
89 raise ValueError("Incomplete URL escape character")
90 else:
91 buf.append(c)
92 return buf
93
94def mkenv(req):
95 env = {}
96 env["wsgi.version"] = 1, 0
97 for key, val in req.headers:
98 env["HTTP_" + key.upper().replace(b"-", b"_").decode("latin-1")] = val.decode("latin-1")
99 env["SERVER_SOFTWARE"] = "ashd-wsgi/1"
100 env["GATEWAY_INTERFACE"] = "CGI/1.1"
101 env["SERVER_PROTOCOL"] = req.ver.decode("latin-1")
102 env["REQUEST_METHOD"] = req.method.decode("latin-1")
103 try:
104 rawpi = unquoteurl(req.rest)
105 except:
106 rawpi = req.rest
107 try:
108 name, rest, pi = (v.decode("utf-8") for v in (req.url, req.rest, rawpi))
109 env["wsgi.uri_encoding"] = "utf-8"
110 except UnicodeError as exc:
111 name, rest, pi = (v.decode("latin-1") for v in (req.url, req.rest, rawpi))
112 env["wsgi.uri_encoding"] = "latin-1"
113 env["REQUEST_URI"] = name
114 p = name.find('?')
115 if p >= 0:
116 env["QUERY_STRING"] = name[p + 1:]
117 name = name[:p]
118 else:
119 env["QUERY_STRING"] = ""
120 if name[-len(rest):] == rest:
121 # This is the same hack used in call*cgi.
122 name = name[:-len(rest)]
123 if name == "/":
124 # This seems to be normal CGI behavior, but see callcgi.c for
125 # details.
126 pi = "/" + pi
127 name = ""
128 env["SCRIPT_NAME"] = name
129 env["PATH_INFO"] = pi
130 for src, tgt in [("HTTP_HOST", "SERVER_NAME"), ("HTTP_X_ASH_PROTOCOL", "wsgi.url_scheme"),
131 ("HTTP_X_ASH_SERVER_ADDRESS", "SERVER_ADDR"), ("HTTP_X_ASH_SERVER_PORT", "SERVER_PORT"),
132 ("HTTP_X_ASH_ADDRESS", "REMOTE_ADDR"), ("HTTP_X_ASH_PORT", "REMOTE_PORT"),
133 ("HTTP_CONTENT_TYPE", "CONTENT_TYPE"), ("HTTP_CONTENT_LENGTH", "CONTENT_LENGTH")]:
134 if src in env: env[tgt] = env[src]
135 for key in ["HTTP_CONTENT_TYPE", "HTTP_CONTENT_LENGTH"]:
136 # The CGI specification does not strictly require this, but
137 # many actualy programs and libraries seem to.
138 if key in env: del env[key]
139 if "X-Ash-Protocol" in req and req["X-Ash-Protocol"] == b"https": env["HTTPS"] = "on"
140 if "X-Ash-File" in req: env["SCRIPT_FILENAME"] = absolutify(req["X-Ash-File"].decode(locale.getpreferredencoding()))
141 env["wsgi.input"] = req.sk
142 env["wsgi.errors"] = sys.stderr
143 env["wsgi.multithread"] = True
144 env["wsgi.multiprocess"] = False
145 env["wsgi.run_once"] = False
146 return env
147
148if reqlimit != 0:
149 guard = ashd.serve.calllimiter(reqlimit).call
150else:
151 guard = lambda fun: fun()
152
153def recode(thing):
154 if isinstance(thing, collections.ByteString):
155 return thing
156 else:
157 return str(thing).encode("latin-1")
158
159class reqthread(ashd.serve.wsgithread):
160 def __init__(self, req):
161 super().__init__()
162 self.req = req.dup()
163
164 def handlewsgi(self):
165 return handler(self.env, self.startreq)
166
167 def writehead(self, status, headers):
168 buf = bytearray()
169 buf += b"HTTP/1.1 " + recode(status) + b"\n"
170 for nm, val in headers:
171 buf += recode(nm) + b": " + recode(val) + b"\n"
172 buf += b"\n"
173 try:
174 self.req.sk.write(buf)
175 except IOError:
176 raise ashd.serve.closed()
177
178 def writedata(self, data):
179 try:
180 self.req.sk.write(data)
181 self.req.sk.flush()
182 except IOError:
183 raise ashd.serve.closed()
184
185 def handle(self):
186 self.env = mkenv(self.req)
187 with ashd.perf.request(self.env) as reqevent:
188 super().handle()
189 if self.status:
190 reqevent.response([self.status, self.headers])
191
192 def run(self):
193 try:
194 guard(super().run)
195 finally:
196 self.req.close()
197 sys.stderr.flush()
198
199def handle(req):
200 reqthread(req).start()
201
202ashd.util.serveloop(handle)