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