Commit | Line | Data |
---|---|---|
173e0e9e | 1 | #!/usr/bin/python |
c270f222 | 2 | |
173e0e9e | 3 | import sys, os, getopt, threading, time |
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-wsgi [-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"]) | |
173e0e9e FT |
35 | except ImportError, exc: |
36 | sys.stderr.write("ashd-wsgi: handler %s not found: %s\n" % (args[0], exc.message)) | |
c270f222 FT |
37 | sys.exit(1) |
38 | if not modwsgi_compat: | |
39 | if not hasattr(handlermod, "wmain"): | |
40 | sys.stderr.write("ashd-wsgi: handler %s has no `wmain' function\n" % args[0]) | |
41 | sys.exit(1) | |
adb11d5f | 42 | handler = handlermod.wmain(*args[1:]) |
c270f222 FT |
43 | else: |
44 | if not hasattr(handlermod, "application"): | |
45 | sys.stderr.write("ashd-wsgi: handler %s has no `application' object\n" % args[0]) | |
46 | sys.exit(1) | |
47 | handler = handlermod.application | |
48 | ||
81a0ca30 FT |
49 | class closed(IOError): |
50 | def __init__(self): | |
173e0e9e | 51 | super(closed, self).__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): |
173e0e9e | 60 | buf = "" |
09c82f9c FT |
61 | i = 0 |
62 | while i < len(url): | |
63 | c = url[i] | |
64 | i += 1 | |
173e0e9e | 65 | if c == '%': |
370d235f | 66 | if len(url) >= i + 2: |
09c82f9c | 67 | c = 0 |
173e0e9e FT |
68 | if '0' <= url[i] <= '9': |
69 | c |= (ord(url[i]) - ord('0')) << 4 | |
70 | elif 'a' <= url[i] <= 'f': | |
71 | c |= (ord(url[i]) - ord('a') + 10) << 4 | |
72 | elif 'A' <= url[i] <= 'F': | |
73 | c |= (ord(url[i]) - ord('A') + 10) << 4 | |
09c82f9c FT |
74 | else: |
75 | raise ValueError("Illegal URL escape character") | |
173e0e9e FT |
76 | if '0' <= url[i + 1] <= '9': |
77 | c |= ord(url[i + 1]) - ord('0') | |
78 | elif 'a' <= url[i + 1] <= 'f': | |
79 | c |= ord(url[i + 1]) - ord('a') + 10 | |
80 | elif 'A' <= url[i + 1] <= 'F': | |
81 | c |= ord(url[i + 1]) - ord('A') + 10 | |
09c82f9c FT |
82 | else: |
83 | raise ValueError("Illegal URL escape character") | |
173e0e9e | 84 | buf += chr(c) |
09c82f9c FT |
85 | i += 2 |
86 | else: | |
87 | raise ValueError("Incomplete URL escape character") | |
88 | else: | |
173e0e9e | 89 | buf += 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: | |
173e0e9e | 96 | env["HTTP_" + key.upper().replace("-", "_")] = val |
c270f222 FT |
97 | env["SERVER_SOFTWARE"] = "ashd-wsgi/1" |
98 | env["GATEWAY_INTERFACE"] = "CGI/1.1" | |
173e0e9e FT |
99 | env["SERVER_PROTOCOL"] = req.ver |
100 | env["REQUEST_METHOD"] = req.method | |
101 | env["REQUEST_URI"] = req.url | |
102 | name = req.url | |
c270f222 FT |
103 | p = name.find('?') |
104 | if p >= 0: | |
c270f222 | 105 | env["QUERY_STRING"] = name[p + 1:] |
8498ab28 | 106 | name = name[:p] |
c270f222 FT |
107 | else: |
108 | env["QUERY_STRING"] = "" | |
173e0e9e | 109 | if name[-len(req.rest):] == req.rest: |
53d666ca | 110 | # This is the same hack used in call*cgi. |
173e0e9e FT |
111 | name = name[:-len(req.rest)] |
112 | try: | |
113 | pi = unquoteurl(req.rest) | |
114 | except: | |
115 | pi = req.rest | |
116 | if name == '/': | |
53d666ca FT |
117 | # This seems to be normal CGI behavior, but see callcgi.c for |
118 | # details. | |
119 | pi = "/" + pi | |
120 | name = "" | |
c270f222 | 121 | env["SCRIPT_NAME"] = name |
53d666ca | 122 | env["PATH_INFO"] = pi |
173e0e9e FT |
123 | if "Host" in req: env["SERVER_NAME"] = req["Host"] |
124 | if "X-Ash-Server-Port" in req: env["SERVER_PORT"] = req["X-Ash-Server-Port"] | |
125 | if "X-Ash-Protocol" in req and req["X-Ash-Protocol"] == "https": env["HTTPS"] = "on" | |
126 | if "X-Ash-Address" in req: env["REMOTE_ADDR"] = req["X-Ash-Address"] | |
127 | if "Content-Type" in req: env["CONTENT_TYPE"] = req["Content-Type"] | |
128 | if "Content-Length" in req: env["CONTENT_LENGTH"] = req["Content-Length"] | |
129 | if "X-Ash-File" in req: env["SCRIPT_FILENAME"] = absolutify(req["X-Ash-File"]) | |
130 | if "X-Ash-Protocol" in req: env["wsgi.url_scheme"] = req["X-Ash-Protocol"] | |
c270f222 FT |
131 | env["wsgi.input"] = req.sk |
132 | env["wsgi.errors"] = sys.stderr | |
133 | env["wsgi.multithread"] = True | |
134 | env["wsgi.multiprocess"] = False | |
135 | env["wsgi.run_once"] = False | |
136 | ||
137 | resp = [] | |
138 | respsent = [] | |
139 | ||
699754de | 140 | def flushreq(): |
c270f222 FT |
141 | if not respsent: |
142 | if not resp: | |
173e0e9e | 143 | raise Exception, "Trying to write data before starting response." |
c270f222 FT |
144 | status, headers = resp |
145 | respsent[:] = [True] | |
8bb0e3c1 | 146 | try: |
173e0e9e FT |
147 | req.sk.write("HTTP/1.1 %s\n" % status) |
148 | for nm, val in headers: | |
149 | req.sk.write("%s: %s\n" % (nm, val)) | |
150 | req.sk.write("\n") | |
8bb0e3c1 FT |
151 | except IOError: |
152 | raise closed() | |
699754de FT |
153 | |
154 | def write(data): | |
155 | if not data: | |
156 | return | |
8bb0e3c1 | 157 | flushreq() |
81a0ca30 FT |
158 | try: |
159 | req.sk.write(data) | |
160 | req.sk.flush() | |
161 | except IOError: | |
162 | raise closed() | |
c270f222 FT |
163 | |
164 | def startreq(status, headers, exc_info = None): | |
165 | if resp: | |
166 | if exc_info: # Interesting, this... | |
167 | try: | |
168 | if respsent: | |
173e0e9e | 169 | raise exc_info[0], exc_info[1], exc_info[2] |
c270f222 FT |
170 | finally: |
171 | exc_info = None # CPython GC bug? | |
172 | else: | |
173e0e9e | 173 | raise Exception, "Can only start responding once." |
c270f222 FT |
174 | resp[:] = status, headers |
175 | return write | |
176 | ||
d5ee5cde FT |
177 | reqevent = ashd.perf.request(env) |
178 | exc = (None, None, None) | |
c270f222 | 179 | try: |
d5ee5cde | 180 | respiter = handler(env, startreq) |
8bb0e3c1 | 181 | try: |
d5ee5cde FT |
182 | try: |
183 | for data in respiter: | |
184 | write(data) | |
185 | if resp: | |
186 | flushreq() | |
187 | except closed: | |
188 | pass | |
189 | finally: | |
190 | if hasattr(respiter, "close"): | |
191 | respiter.close() | |
192 | if resp: | |
193 | reqevent.response(resp) | |
194 | except: | |
195 | exc = sys.exc_info() | |
f1263757 | 196 | raise |
c270f222 | 197 | finally: |
d5ee5cde | 198 | reqevent.__exit__(*exc) |
c270f222 | 199 | |
3e11d7ed FT |
200 | flightlock = threading.Condition() |
201 | inflight = 0 | |
202 | ||
c270f222 FT |
203 | class reqthread(threading.Thread): |
204 | def __init__(self, req): | |
173e0e9e | 205 | super(reqthread, self).__init__(name = "Request handler") |
c270f222 FT |
206 | self.req = req.dup() |
207 | ||
208 | def run(self): | |
3e11d7ed | 209 | global inflight |
c270f222 | 210 | try: |
173e0e9e FT |
211 | flightlock.acquire() |
212 | try: | |
3e11d7ed FT |
213 | if reqlimit != 0: |
214 | start = time.time() | |
215 | while inflight >= reqlimit: | |
216 | flightlock.wait(10) | |
217 | if time.time() - start > 10: | |
218 | os.abort() | |
219 | inflight += 1 | |
173e0e9e FT |
220 | finally: |
221 | flightlock.release() | |
3e11d7ed FT |
222 | try: |
223 | dowsgi(self.req) | |
224 | finally: | |
173e0e9e FT |
225 | flightlock.acquire() |
226 | try: | |
3e11d7ed FT |
227 | inflight -= 1 |
228 | flightlock.notify() | |
173e0e9e FT |
229 | finally: |
230 | flightlock.release() | |
c270f222 FT |
231 | finally: |
232 | self.req.close() | |
233 | ||
234 | def handle(req): | |
235 | reqthread(req).start() | |
236 | ||
4e7888f7 | 237 | ashd.util.serveloop(handle) |