Commit | Line | Data |
---|---|---|
55fa3f63 | 1 | #!/usr/bin/python3 |
c270f222 | 2 | |
55fa3f63 | 3 | import sys, os, getopt, threading, time, locale, collections |
d5ee5cde FT |
4 | import ashd.proto, ashd.util, ashd.perf |
5 | try: | |
6 | import pdm.srv | |
7 | except: | |
8 | pdm = None | |
c270f222 FT |
9 | |
10 | def usage(out): | |
d5ee5cde | 11 | out.write("usage: ashd-wsgi3 [-hA] [-m PDM-SPEC] [-p MODPATH] [-l REQLIMIT] HANDLER-MODULE [ARGS...]\n") |
c270f222 | 12 | |
3e11d7ed | 13 | reqlimit = 0 |
c270f222 | 14 | modwsgi_compat = False |
d5ee5cde | 15 | opts, args = getopt.getopt(sys.argv[1:], "+hAp:l:m:") |
c270f222 FT |
16 | for o, a in opts: |
17 | if o == "-h": | |
18 | usage(sys.stdout) | |
19 | sys.exit(0) | |
20 | elif o == "-p": | |
21 | sys.path.insert(0, a) | |
22 | elif o == "-A": | |
23 | modwsgi_compat = True | |
3e11d7ed FT |
24 | elif o == "-l": |
25 | reqlimit = int(a) | |
d5ee5cde FT |
26 | elif o == "-m": |
27 | if pdm is not None: | |
28 | pdm.srv.listen(a) | |
c270f222 FT |
29 | if len(args) < 1: |
30 | usage(sys.stderr) | |
31 | sys.exit(1) | |
32 | ||
33 | try: | |
34 | handlermod = __import__(args[0], fromlist = ["dummy"]) | |
55fa3f63 | 35 | except ImportError as exc: |
1f3d7aa3 | 36 | sys.stderr.write("ashd-wsgi3: handler %s not found: %s\n" % (args[0], exc.args[0])) |
c270f222 FT |
37 | sys.exit(1) |
38 | if not modwsgi_compat: | |
39 | if not hasattr(handlermod, "wmain"): | |
1f3d7aa3 | 40 | sys.stderr.write("ashd-wsgi3: handler %s has no `wmain' function\n" % args[0]) |
c270f222 | 41 | sys.exit(1) |
adb11d5f | 42 | handler = handlermod.wmain(*args[1:]) |
c270f222 FT |
43 | else: |
44 | if not hasattr(handlermod, "application"): | |
1f3d7aa3 | 45 | sys.stderr.write("ashd-wsgi3: handler %s has no `application' object\n" % args[0]) |
c270f222 FT |
46 | sys.exit(1) |
47 | handler = handlermod.application | |
48 | ||
81a0ca30 FT |
49 | class closed(IOError): |
50 | def __init__(self): | |
55fa3f63 | 51 | super().__init__("The client has closed the connection.") |
81a0ca30 | 52 | |
70d942a7 FT |
53 | cwd = os.getcwd() |
54 | def absolutify(path): | |
55 | if path[0] != '/': | |
56 | return os.path.join(cwd, path) | |
57 | return path | |
58 | ||
09c82f9c | 59 | def unquoteurl(url): |
55fa3f63 | 60 | buf = bytearray() |
09c82f9c FT |
61 | i = 0 |
62 | while i < len(url): | |
63 | c = url[i] | |
64 | i += 1 | |
55fa3f63 | 65 | if c == ord(b'%'): |
370d235f | 66 | if len(url) >= i + 2: |
09c82f9c | 67 | c = 0 |
55fa3f63 FT |
68 | if ord(b'0') <= url[i] <= ord(b'9'): |
69 | c |= (url[i] - ord(b'0')) << 4 | |
70 | elif ord(b'a') <= url[i] <= ord(b'f'): | |
71 | c |= (url[i] - ord(b'a') + 10) << 4 | |
72 | elif ord(b'A') <= url[i] <= ord(b'F'): | |
73 | c |= (url[i] - ord(b'A') + 10) << 4 | |
09c82f9c FT |
74 | else: |
75 | raise ValueError("Illegal URL escape character") | |
55fa3f63 FT |
76 | if ord(b'0') <= url[i + 1] <= ord(b'9'): |
77 | c |= url[i + 1] - ord('0') | |
78 | elif ord(b'a') <= url[i + 1] <= ord(b'f'): | |
79 | c |= url[i + 1] - ord(b'a') + 10 | |
80 | elif ord(b'A') <= url[i + 1] <= ord(b'F'): | |
81 | c |= url[i + 1] - ord(b'A') + 10 | |
09c82f9c FT |
82 | else: |
83 | raise ValueError("Illegal URL escape character") | |
55fa3f63 | 84 | buf.append(c) |
09c82f9c FT |
85 | i += 2 |
86 | else: | |
87 | raise ValueError("Incomplete URL escape character") | |
88 | else: | |
55fa3f63 | 89 | buf.append(c) |
09c82f9c | 90 | return buf |
81a0ca30 | 91 | |
c270f222 FT |
92 | def dowsgi(req): |
93 | env = {} | |
94 | env["wsgi.version"] = 1, 0 | |
95 | for key, val in req.headers: | |
55fa3f63 | 96 | env["HTTP_" + key.upper().replace(b"-", b"_").decode("latin-1")] = val.decode("latin-1") |
c270f222 FT |
97 | env["SERVER_SOFTWARE"] = "ashd-wsgi/1" |
98 | env["GATEWAY_INTERFACE"] = "CGI/1.1" | |
55fa3f63 FT |
99 | env["SERVER_PROTOCOL"] = req.ver.decode("latin-1") |
100 | env["REQUEST_METHOD"] = req.method.decode("latin-1") | |
101 | try: | |
102 | rawpi = unquoteurl(req.rest) | |
103 | except: | |
104 | rawpi = req.rest | |
105 | try: | |
106 | name, rest, pi = (v.decode("utf-8") for v in (req.url, req.rest, rawpi)) | |
107 | env["wsgi.uri_encoding"] = "utf-8" | |
108 | except UnicodeError as exc: | |
109 | name, rest, pi = (v.decode("latin-1") for v in (req.url, req.rest, rawpi)) | |
110 | env["wsgi.uri_encoding"] = "latin-1" | |
111 | env["REQUEST_URI"] = name | |
c270f222 FT |
112 | p = name.find('?') |
113 | if p >= 0: | |
c270f222 | 114 | env["QUERY_STRING"] = name[p + 1:] |
8498ab28 | 115 | name = name[:p] |
c270f222 FT |
116 | else: |
117 | env["QUERY_STRING"] = "" | |
55fa3f63 | 118 | if name[-len(rest):] == rest: |
53d666ca | 119 | # This is the same hack used in call*cgi. |
55fa3f63 FT |
120 | name = name[:-len(rest)] |
121 | if name == "/": | |
53d666ca FT |
122 | # This seems to be normal CGI behavior, but see callcgi.c for |
123 | # details. | |
124 | pi = "/" + pi | |
125 | name = "" | |
c270f222 | 126 | env["SCRIPT_NAME"] = name |
53d666ca | 127 | env["PATH_INFO"] = pi |
55fa3f63 FT |
128 | for src, tgt in [("HTTP_HOST", "SERVER_NAME"), ("HTTP_X_ASH_SERVER_PORT", "SERVER_PORT"), |
129 | ("HTTP_X_ASH_ADDRESS", "REMOTE_ADDR"), ("HTTP_CONTENT_TYPE", "CONTENT_TYPE"), | |
130 | ("HTTP_CONTENT_LENGTH", "CONTENT_LENGTH"), ("HTTP_X_ASH_PROTOCOL", "wsgi.url_scheme")]: | |
131 | if src in env: env[tgt] = env[src] | |
132 | if "X-Ash-Protocol" in req and req["X-Ash-Protocol"] == b"https": env["HTTPS"] = "on" | |
133 | if "X-Ash-File" in req: env["SCRIPT_FILENAME"] = absolutify(req["X-Ash-File"].decode(locale.getpreferredencoding())) | |
c270f222 FT |
134 | env["wsgi.input"] = req.sk |
135 | env["wsgi.errors"] = sys.stderr | |
136 | env["wsgi.multithread"] = True | |
137 | env["wsgi.multiprocess"] = False | |
138 | env["wsgi.run_once"] = False | |
139 | ||
140 | resp = [] | |
141 | respsent = [] | |
142 | ||
55fa3f63 FT |
143 | def recode(thing): |
144 | if isinstance(thing, collections.ByteString): | |
145 | return thing | |
146 | else: | |
147 | return str(thing).encode("latin-1") | |
148 | ||
699754de | 149 | def flushreq(): |
c270f222 FT |
150 | if not respsent: |
151 | if not resp: | |
55fa3f63 | 152 | raise Exception("Trying to write data before starting response.") |
c270f222 FT |
153 | status, headers = resp |
154 | respsent[:] = [True] | |
55fa3f63 FT |
155 | buf = bytearray() |
156 | buf += b"HTTP/1.1 " + recode(status) + b"\n" | |
157 | for nm, val in headers: | |
158 | buf += recode(nm) + b": " + recode(val) + b"\n" | |
159 | buf += b"\n" | |
8bb0e3c1 | 160 | try: |
55fa3f63 | 161 | req.sk.write(buf) |
8bb0e3c1 FT |
162 | except IOError: |
163 | raise closed() | |
699754de FT |
164 | |
165 | def write(data): | |
166 | if not data: | |
167 | return | |
8bb0e3c1 | 168 | flushreq() |
81a0ca30 FT |
169 | try: |
170 | req.sk.write(data) | |
171 | req.sk.flush() | |
172 | except IOError: | |
173 | raise closed() | |
c270f222 FT |
174 | |
175 | def startreq(status, headers, exc_info = None): | |
176 | if resp: | |
177 | if exc_info: # Interesting, this... | |
178 | try: | |
179 | if respsent: | |
55fa3f63 | 180 | raise exc_info[1] |
c270f222 FT |
181 | finally: |
182 | exc_info = None # CPython GC bug? | |
183 | else: | |
55fa3f63 | 184 | raise Exception("Can only start responding once.") |
c270f222 FT |
185 | resp[:] = status, headers |
186 | return write | |
187 | ||
d5ee5cde FT |
188 | with ashd.perf.request(env) as reqevent: |
189 | respiter = handler(env, startreq) | |
8bb0e3c1 | 190 | try: |
d5ee5cde FT |
191 | try: |
192 | for data in respiter: | |
193 | write(data) | |
194 | if resp: | |
195 | flushreq() | |
196 | except closed: | |
197 | pass | |
198 | finally: | |
199 | if hasattr(respiter, "close"): | |
200 | respiter.close() | |
201 | if resp: | |
202 | reqevent.response(resp) | |
c270f222 | 203 | |
3e11d7ed FT |
204 | flightlock = threading.Condition() |
205 | inflight = 0 | |
206 | ||
c270f222 FT |
207 | class reqthread(threading.Thread): |
208 | def __init__(self, req): | |
55fa3f63 | 209 | super().__init__(name = "Request handler") |
c270f222 FT |
210 | self.req = req.dup() |
211 | ||
212 | def run(self): | |
3e11d7ed | 213 | global inflight |
c270f222 | 214 | try: |
55fa3f63 | 215 | with flightlock: |
3e11d7ed FT |
216 | if reqlimit != 0: |
217 | start = time.time() | |
218 | while inflight >= reqlimit: | |
219 | flightlock.wait(10) | |
220 | if time.time() - start > 10: | |
221 | os.abort() | |
222 | inflight += 1 | |
3e11d7ed FT |
223 | try: |
224 | dowsgi(self.req) | |
225 | finally: | |
55fa3f63 | 226 | with flightlock: |
3e11d7ed FT |
227 | inflight -= 1 |
228 | flightlock.notify() | |
c270f222 FT |
229 | finally: |
230 | self.req.close() | |
a83cfbbc | 231 | sys.stderr.flush() |
c270f222 FT |
232 | |
233 | def handle(req): | |
234 | reqthread(req).start() | |
235 | ||
4e7888f7 | 236 | ashd.util.serveloop(handle) |