2000-03-28 12:05:13 +00:00
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"""PythonCGISlave.py
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This program can be used in two ways:
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- As a Python CGI script server for web servers supporting "Actions", like WebStar.
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- As a wrapper for a single Python CGI script, for any "compliant" Mac web server.
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See CGI_README.txt for more details.
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"""
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#
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# Written by Just van Rossum, but partly stolen from example code by Jack.
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#
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LONG_RUNNING = 1 # If true, don't quit after each request.
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import MacOS
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MacOS.SchedParams(0, 0)
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from MiniAEFrame import AEServer, MiniApplication
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import os
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import string
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import cStringIO
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import sys
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import traceback
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import mimetools
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__version__ = '3.2'
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slave_dir = os.getcwd()
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# log file for errors
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sys.stderr = open(sys.argv[0] + ".errors", "a+")
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def convertFSSpec(fss):
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return fss.as_pathname()
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# AE -> os.environ mappings
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ae2environ = {
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'kfor': 'QUERY_STRING',
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'Kcip': 'REMOTE_ADDR',
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'svnm': 'SERVER_NAME',
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'svpt': 'SERVER_PORT',
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'addr': 'REMOTE_HOST',
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'scnm': 'SCRIPT_NAME',
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'meth': 'REQUEST_METHOD',
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'ctyp': 'CONTENT_TYPE',
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}
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ERROR_MESSAGE = """\
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Content-type: text/html
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<html>
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<head>
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<title>Error response</title>
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</head>
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<body>
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<h1>Error response</h1>
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<p>Error code %d.
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<p>Message: %s.
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</body>
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</html>
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"""
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def get_cgi_code():
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# If we're a CGI wrapper, the CGI code resides in a PYC resource.
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2001-08-25 12:15:04 +00:00
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from Carbon import Res
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import marshal
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2000-03-28 12:05:13 +00:00
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try:
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code = Res.GetNamedResource('PYC ', "CGI_MAIN")
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except Res.Error:
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return None
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else:
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return marshal.loads(code.data[8:])
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class PythonCGISlave(AEServer, MiniApplication):
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def __init__(self):
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self.crumblezone = 100000 * "\0"
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MiniApplication.__init__(self)
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AEServer.__init__(self)
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self.installaehandler('aevt', 'oapp', self.open_app)
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self.installaehandler('aevt', 'quit', self.quit)
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self.installaehandler('WWW\275', 'sdoc', self.cgihandler)
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self.code = get_cgi_code()
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self.long_running = LONG_RUNNING
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if self.code is None:
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print "%s version %s, ready to serve." % (self.__class__.__name__, __version__)
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else:
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print "%s, ready to serve." % os.path.basename(sys.argv[0])
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try:
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self.mainloop()
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except:
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self.crumblezone = None
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sys.stderr.write("- " * 30 + '\n')
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self.message("Unexpected exception")
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self.dump_environ()
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sys.stderr.write("%s: %s\n" % sys.exc_info()[:2])
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def getabouttext(self):
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if self.code is None:
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return "PythonCGISlave %s, written by Just van Rossum." % __version__
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else:
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return "Python CGI script, wrapped by BuildCGIApplet and " \
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"PythonCGISlave, version %s." % __version__
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def getaboutmenutext(self):
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return "About %s\311" % os.path.basename(sys.argv[0])
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def message(self, msg):
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import time
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sys.stderr.write("%s (%s)\n" % (msg, time.asctime(time.localtime(time.time()))))
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def dump_environ(self):
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sys.stderr.write("os.environ = {\n")
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keys = os.environ.keys()
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keys.sort()
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for key in keys:
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sys.stderr.write(" %s: %s,\n" % (repr(key), repr(os.environ[key])))
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sys.stderr.write("}\n")
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def quit(self, **args):
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self.quitting = 1
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def open_app(self, **args):
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pass
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def cgihandler(self, pathargs, **args):
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# We emulate the unix way of doing CGI: fill os.environ with stuff.
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environ = os.environ
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# First, find the document root. If we don't get a DIRE parameter,
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# we take the directory of this program, which may be wrong if
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# it doesn't live the actual http document root folder.
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if args.has_key('DIRE'):
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http_root = args['DIRE'].as_pathname()
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del args['DIRE']
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else:
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http_root = slave_dir
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environ['DOCUMENT_ROOT'] = http_root
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if self.code is None:
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# create a Mac pathname to the Python CGI script or applet
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script = string.replace(args['scnm'], '/', ':')
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script_path = os.path.join(http_root, script)
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else:
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script_path = sys.argv[0]
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if not os.path.exists(script_path):
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rv = "HTTP/1.0 404 Not found\n"
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rv = rv + ERROR_MESSAGE % (404, "Not found")
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return rv
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# Kfrq is the complete http request.
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infile = cStringIO.StringIO(args['Kfrq'])
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firstline = infile.readline()
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msg = mimetools.Message(infile, 0)
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uri, protocol = string.split(firstline)[1:3]
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environ['REQUEST_URI'] = uri
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environ['SERVER_PROTOCOL'] = protocol
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# Make all http headers available as HTTP_* fields.
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for key in msg.keys():
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environ['HTTP_' + string.upper(string.replace(key, "-", "_"))] = msg[key]
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# Translate the AE parameters we know of to the appropriate os.environ
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# entries. Make the ones we don't know available as AE_* fields.
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items = args.items()
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items.sort()
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for key, value in items:
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if key[0] == "_":
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continue
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if ae2environ.has_key(key):
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envkey = ae2environ[key]
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environ[envkey] = value
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else:
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environ['AE_' + string.upper(key)] = str(value)
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# Redirect stdout and stdin.
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saveout = sys.stdout
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savein = sys.stdin
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out = sys.stdout = cStringIO.StringIO()
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postdata = args.get('post', "")
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if postdata:
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environ['CONTENT_LENGTH'] = str(len(postdata))
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sys.stdin = cStringIO.StringIO(postdata)
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# Set up the Python environment
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script_dir = os.path.dirname(script_path)
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os.chdir(script_dir)
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sys.path.insert(0, script_dir)
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sys.argv[:] = [script_path]
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namespace = {"__name__": "__main__"}
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rv = "HTTP/1.0 200 OK\n"
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try:
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if self.code is None:
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# we're a Python script server
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execfile(script_path, namespace)
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else:
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# we're a CGI wrapper, self.code is the CGI code
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exec self.code in namespace
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except SystemExit:
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# We're not exiting dammit! ;-)
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pass
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except:
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self.crumblezone = None
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sys.stderr.write("- " * 30 + '\n')
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self.message("CGI exception")
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self.dump_environ()
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traceback.print_exc()
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sys.stderr.flush()
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self.quitting = 1
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# XXX we should return an error AE, but I don't know how to :-(
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rv = "HTTP/1.0 500 Internal error\n"
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# clean up
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namespace.clear()
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environ.clear()
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sys.path.remove(script_dir)
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sys.stdout = saveout
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sys.stdin = savein
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if not self.long_running:
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# quit after each request
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self.quitting = 1
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return rv + out.getvalue()
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PythonCGISlave()
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