| 1 | #!/usr/bin/python3 |
| 2 | |
| 3 | import sys, os, getopt, socket, logging, time, locale, collections, signal |
| 4 | import ashd.util, ashd.serve, ashd.htlib |
| 5 | try: |
| 6 | import pdm.srv |
| 7 | except: |
| 8 | pdm = None |
| 9 | |
| 10 | def usage(out): |
| 11 | out.write("usage: ashd-wsgi3 [-hAL] [-m PDM-SPEC] [-p MODPATH] [-t REQUEST-HANDLER[:PAR[=VAL](,PAR[=VAL])...]] HANDLER-MODULE [ARGS...]\n") |
| 12 | |
| 13 | hspec = "free", {} |
| 14 | modwsgi_compat = False |
| 15 | setlog = True |
| 16 | opts, args = getopt.getopt(sys.argv[1:], "+hALp:t:l:m:") |
| 17 | for 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) |
| 34 | if len(args) < 1: |
| 35 | usage(sys.stderr) |
| 36 | sys.exit(1) |
| 37 | if setlog: |
| 38 | logging.basicConfig(format="ashd-wsgi3(%(name)s): %(levelname)s: %(message)s") |
| 39 | log = logging.getLogger("ashd-wsgi3") |
| 40 | |
| 41 | try: |
| 42 | handlermod = __import__(args[0], fromlist = ["dummy"]) |
| 43 | except ImportError as exc: |
| 44 | sys.stderr.write("ashd-wsgi3: handler %s not found: %s\n" % (args[0], exc.args[0])) |
| 45 | sys.exit(1) |
| 46 | if not modwsgi_compat: |
| 47 | if not hasattr(handlermod, "wmain"): |
| 48 | sys.stderr.write("ashd-wsgi3: handler %s has no `wmain' function\n" % args[0]) |
| 49 | sys.exit(1) |
| 50 | handler = handlermod.wmain(*args[1:]) |
| 51 | else: |
| 52 | if not hasattr(handlermod, "application"): |
| 53 | sys.stderr.write("ashd-wsgi3: handler %s has no `application' object\n" % args[0]) |
| 54 | sys.exit(1) |
| 55 | handler = handlermod.application |
| 56 | |
| 57 | cwd = os.getcwd() |
| 58 | def absolutify(path): |
| 59 | if path[0] != '/': |
| 60 | return os.path.join(cwd, path) |
| 61 | return path |
| 62 | |
| 63 | def unquoteurl(url): |
| 64 | buf = bytearray() |
| 65 | i = 0 |
| 66 | while i < len(url): |
| 67 | c = url[i] |
| 68 | i += 1 |
| 69 | if c == ord(b'%'): |
| 70 | if len(url) >= i + 2: |
| 71 | c = 0 |
| 72 | if ord(b'0') <= url[i] <= ord(b'9'): |
| 73 | c |= (url[i] - ord(b'0')) << 4 |
| 74 | elif ord(b'a') <= url[i] <= ord(b'f'): |
| 75 | c |= (url[i] - ord(b'a') + 10) << 4 |
| 76 | elif ord(b'A') <= url[i] <= ord(b'F'): |
| 77 | c |= (url[i] - ord(b'A') + 10) << 4 |
| 78 | else: |
| 79 | raise ValueError("Illegal URL escape character") |
| 80 | if ord(b'0') <= url[i + 1] <= ord(b'9'): |
| 81 | c |= url[i + 1] - ord('0') |
| 82 | elif ord(b'a') <= url[i + 1] <= ord(b'f'): |
| 83 | c |= url[i + 1] - ord(b'a') + 10 |
| 84 | elif ord(b'A') <= url[i + 1] <= ord(b'F'): |
| 85 | c |= url[i + 1] - ord(b'A') + 10 |
| 86 | else: |
| 87 | raise ValueError("Illegal URL escape character") |
| 88 | buf.append(c) |
| 89 | i += 2 |
| 90 | else: |
| 91 | raise ValueError("Incomplete URL escape character") |
| 92 | else: |
| 93 | buf.append(c) |
| 94 | return buf |
| 95 | |
| 96 | def mkenv(req): |
| 97 | env = {} |
| 98 | env["wsgi.version"] = 1, 0 |
| 99 | for key, val in req.headers: |
| 100 | env["HTTP_" + key.upper().replace(b"-", b"_").decode("latin-1")] = val.decode("latin-1") |
| 101 | env["SERVER_SOFTWARE"] = "ashd-wsgi/1" |
| 102 | env["GATEWAY_INTERFACE"] = "CGI/1.1" |
| 103 | env["SERVER_PROTOCOL"] = req.ver.decode("latin-1") |
| 104 | env["REQUEST_METHOD"] = req.method.decode("latin-1") |
| 105 | try: |
| 106 | rawpi = unquoteurl(req.rest) |
| 107 | except: |
| 108 | rawpi = req.rest |
| 109 | try: |
| 110 | name, rest, pi = (v.decode("utf-8") for v in (req.url, req.rest, rawpi)) |
| 111 | env["wsgi.uri_encoding"] = "utf-8" |
| 112 | except UnicodeError as exc: |
| 113 | name, rest, pi = (v.decode("latin-1") for v in (req.url, req.rest, rawpi)) |
| 114 | env["wsgi.uri_encoding"] = "latin-1" |
| 115 | env["REQUEST_URI"] = name |
| 116 | p = name.find('?') |
| 117 | if p >= 0: |
| 118 | env["QUERY_STRING"] = name[p + 1:] |
| 119 | name = name[:p] |
| 120 | else: |
| 121 | env["QUERY_STRING"] = "" |
| 122 | if name[-len(rest):] == rest: |
| 123 | # This is the same hack used in call*cgi. |
| 124 | name = name[:-len(rest)] |
| 125 | if name == "/": |
| 126 | # This seems to be normal CGI behavior, but see callcgi.c for |
| 127 | # details. |
| 128 | pi = "/" + pi |
| 129 | name = "" |
| 130 | env["SCRIPT_NAME"] = name |
| 131 | env["PATH_INFO"] = pi |
| 132 | for src, tgt in [("HTTP_HOST", "SERVER_NAME"), ("HTTP_X_ASH_PROTOCOL", "wsgi.url_scheme"), |
| 133 | ("HTTP_X_ASH_SERVER_ADDRESS", "SERVER_ADDR"), ("HTTP_X_ASH_SERVER_PORT", "SERVER_PORT"), |
| 134 | ("HTTP_X_ASH_ADDRESS", "REMOTE_ADDR"), ("HTTP_X_ASH_PORT", "REMOTE_PORT"), |
| 135 | ("HTTP_CONTENT_TYPE", "CONTENT_TYPE"), ("HTTP_CONTENT_LENGTH", "CONTENT_LENGTH")]: |
| 136 | if src in env: env[tgt] = env[src] |
| 137 | for key in ["HTTP_CONTENT_TYPE", "HTTP_CONTENT_LENGTH"]: |
| 138 | # The CGI specification does not strictly require this, but |
| 139 | # many actualy programs and libraries seem to. |
| 140 | if key in env: del env[key] |
| 141 | if "X-Ash-Protocol" in req and req["X-Ash-Protocol"] == b"https": env["HTTPS"] = "on" |
| 142 | if "X-Ash-File" in req: env["SCRIPT_FILENAME"] = absolutify(req["X-Ash-File"].decode(locale.getpreferredencoding())) |
| 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 | |
| 150 | def recode(thing): |
| 151 | if isinstance(thing, collections.ByteString): |
| 152 | return thing |
| 153 | else: |
| 154 | return str(thing).encode("latin-1") |
| 155 | |
| 156 | class request(ashd.serve.wsgirequest): |
| 157 | def __init__(self, *, bkreq, **kw): |
| 158 | super().__init__(**kw) |
| 159 | self.bkreq = bkreq.dup() |
| 160 | self.sendrights = None |
| 161 | |
| 162 | def mkenv(self): |
| 163 | return mkenv(self.bkreq) |
| 164 | |
| 165 | def handlewsgi(self, env, startreq): |
| 166 | return handler(env, startreq) |
| 167 | |
| 168 | def fileno(self): |
| 169 | return self.bkreq.bsk.fileno() |
| 170 | |
| 171 | def writehead(self, status, headers): |
| 172 | headers = list(headers) |
| 173 | for header in headers: |
| 174 | nm, val = header |
| 175 | if nm.lower() == "x-ash-send-rights": |
| 176 | self.sendrights = val |
| 177 | headers.remove(header) |
| 178 | break |
| 179 | w = self.buffer.extend |
| 180 | w(b"HTTP/1.1 " + recode(status) + b"\n") |
| 181 | for nm, val in headers: |
| 182 | w(recode(nm) + b": " + recode(val) + b"\n") |
| 183 | w(b"\n") |
| 184 | |
| 185 | def flush(self): |
| 186 | try: |
| 187 | if self.sendrights is not None: |
| 188 | ret = ashd.htlib.sendfd(self.bkreq.bsk.fileno(), self.sendrights.fileno(), self.buffer) |
| 189 | self.sendrights.close() |
| 190 | self.sendrights = None |
| 191 | else: |
| 192 | ret = self.bkreq.bsk.send(self.buffer, socket.MSG_DONTWAIT) |
| 193 | self.buffer[:ret] = b"" |
| 194 | except IOError: |
| 195 | raise ashd.serve.closed() |
| 196 | |
| 197 | def close(self): |
| 198 | try: |
| 199 | self.bkreq.close() |
| 200 | finally: |
| 201 | if self.sendrights is not None: |
| 202 | self.sendrights.close() |
| 203 | |
| 204 | def handle(req): |
| 205 | reqhandler.handle(request(bkreq=req, handler=reqhandler)) |
| 206 | |
| 207 | if hspec[0] not in ashd.serve.names: |
| 208 | sys.stderr.write("ashd-wsgi3: no such request handler: %s\n" % hspec[0]) |
| 209 | sys.exit(1) |
| 210 | hclass = ashd.serve.names[hspec[0]] |
| 211 | try: |
| 212 | hargs = hclass.parseargs(**hspec[1]) |
| 213 | except ValueError as exc: |
| 214 | sys.stderr.write("ashd-wsgi3: %s\n" % exc) |
| 215 | sys.exit(1) |
| 216 | |
| 217 | def sigterm(sig, frame): |
| 218 | socket.fromfd(0, socket.AF_UNIX, socket.SOCK_SEQPACKET).shutdown(socket.SHUT_RDWR) # :P |
| 219 | for signum in [signal.SIGINT, signal.SIGTERM]: |
| 220 | signal.signal(signum, sigterm) |
| 221 | |
| 222 | reqhandler = hclass(**hargs) |
| 223 | try: |
| 224 | ashd.util.serveloop(handle) |
| 225 | finally: |
| 226 | reqhandler.close() |