| 1 | #!/usr/bin/python |
| 2 | |
| 3 | import sys, os, getopt, threading |
| 4 | import ashd.proto |
| 5 | |
| 6 | def usage(out): |
| 7 | out.write("usage: ashd-wsgi [-hA] [-p MODPATH] HANDLER-MODULE [ARGS...]\n") |
| 8 | |
| 9 | modwsgi_compat = False |
| 10 | opts, args = getopt.getopt(sys.argv[1:], "+hAp:") |
| 11 | for o, a in opts: |
| 12 | if o == "-h": |
| 13 | usage(sys.stdout) |
| 14 | sys.exit(0) |
| 15 | elif o == "-p": |
| 16 | sys.path.insert(0, a) |
| 17 | elif o == "-A": |
| 18 | modwsgi_compat = True |
| 19 | if len(args) < 1: |
| 20 | usage(sys.stderr) |
| 21 | sys.exit(1) |
| 22 | |
| 23 | try: |
| 24 | handlermod = __import__(args[0], fromlist = ["dummy"]) |
| 25 | except ImportError, exc: |
| 26 | sys.stderr.write("ashd-wsgi: handler %s not found: %s\n" % (args[0], exc.message)) |
| 27 | sys.exit(1) |
| 28 | if not modwsgi_compat: |
| 29 | if not hasattr(handlermod, "wmain"): |
| 30 | sys.stderr.write("ashd-wsgi: handler %s has no `wmain' function\n" % args[0]) |
| 31 | sys.exit(1) |
| 32 | handler = handlermod.wmain(args[1:]) |
| 33 | else: |
| 34 | if not hasattr(handlermod, "application"): |
| 35 | sys.stderr.write("ashd-wsgi: handler %s has no `application' object\n" % args[0]) |
| 36 | sys.exit(1) |
| 37 | handler = handlermod.application |
| 38 | |
| 39 | def dowsgi(req): |
| 40 | env = {} |
| 41 | env["wsgi.version"] = 1, 0 |
| 42 | for key, val in req.headers: |
| 43 | env["HTTP_" + key.upper().replace("-", "_")] = val |
| 44 | env["SERVER_SOFTWARE"] = "ashd-wsgi/1" |
| 45 | env["GATEWAY_INTERFACE"] = "CGI/1.1" |
| 46 | env["SERVER_PROTOCOL"] = req.ver |
| 47 | env["REQUEST_METHOD"] = req.method |
| 48 | env["REQUEST_URI"] = req.url |
| 49 | env["PATH_INFO"] = req.rest |
| 50 | name = req.url |
| 51 | p = name.find('?') |
| 52 | if p >= 0: |
| 53 | name = name[:p] |
| 54 | env["QUERY_STRING"] = name[p + 1:] |
| 55 | else: |
| 56 | env["QUERY_STRING"] = "" |
| 57 | if name[-len(req.rest):] == req.rest: |
| 58 | name = name[:-len(req.rest)] |
| 59 | env["SCRIPT_NAME"] = name |
| 60 | if "Host" in req: env["SERVER_NAME"] = req["Host"] |
| 61 | if "X-Ash-Server-Port" in req: env["SERVER_PORT"] = req["X-Ash-Server-Port"] |
| 62 | if "X-Ash-Protocol" in req and req["X-Ash-Protocol"] == "https": env["HTTPS"] = "on" |
| 63 | if "X-Ash-Address" in req: env["REMOTE_ADDR"] = req["X-Ash-Address"] |
| 64 | if "Content-Type" in req: env["CONTENT_TYPE"] = req["Content-Type"] |
| 65 | if "Content-Length" in req: env["CONTENT_LENGTH"] = req["Content-Length"] |
| 66 | if "X-Ash-File" in req: env["SCRIPT_FILENAME"] = req["X-Ash-File"] |
| 67 | if "X-Ash-Protocol" in req: env["wsgi.url_scheme"] = req["X-Ash-Protocol"] |
| 68 | env["wsgi.input"] = req.sk |
| 69 | env["wsgi.errors"] = sys.stderr |
| 70 | env["wsgi.multithread"] = True |
| 71 | env["wsgi.multiprocess"] = False |
| 72 | env["wsgi.run_once"] = False |
| 73 | |
| 74 | resp = [] |
| 75 | respsent = [] |
| 76 | |
| 77 | def flushreq(): |
| 78 | if not respsent: |
| 79 | if not resp: |
| 80 | raise Exception, "Trying to write data before starting response." |
| 81 | status, headers = resp |
| 82 | respsent[:] = [True] |
| 83 | req.sk.write("HTTP/1.1 %s\n" % status) |
| 84 | for nm, val in headers: |
| 85 | req.sk.write("%s: %s\n" % (nm, val)) |
| 86 | req.sk.write("\n") |
| 87 | |
| 88 | def write(data): |
| 89 | if not data: |
| 90 | return |
| 91 | flushreq() |
| 92 | req.sk.write(data) |
| 93 | req.sk.flush() |
| 94 | |
| 95 | def startreq(status, headers, exc_info = None): |
| 96 | if resp: |
| 97 | if exc_info: # Interesting, this... |
| 98 | try: |
| 99 | if respsent: |
| 100 | raise exc_info[0], exc_info[1], exc_info[2] |
| 101 | finally: |
| 102 | exc_info = None # CPython GC bug? |
| 103 | else: |
| 104 | raise Exception, "Can only start responding once." |
| 105 | resp[:] = status, headers |
| 106 | return write |
| 107 | |
| 108 | respiter = handler(env, startreq) |
| 109 | try: |
| 110 | for data in respiter: |
| 111 | write(data) |
| 112 | if resp: |
| 113 | flushreq() |
| 114 | finally: |
| 115 | if hasattr(respiter, "close"): |
| 116 | respiter.close() |
| 117 | |
| 118 | class reqthread(threading.Thread): |
| 119 | def __init__(self, req): |
| 120 | super(reqthread, self).__init__(name = "Request handler") |
| 121 | self.req = req.dup() |
| 122 | |
| 123 | def run(self): |
| 124 | try: |
| 125 | dowsgi(self.req) |
| 126 | finally: |
| 127 | self.req.close() |
| 128 | |
| 129 | def handle(req): |
| 130 | reqthread(req).start() |
| 131 | |
| 132 | ashd.proto.serveloop(handle) |