[02dcba5] | 1 | #!/usr/local/bin/python |
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| 2 | |
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| 3 | import sys |
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| 4 | |
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| 5 | from BaseHTTPServer import BaseHTTPRequestHandler |
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| 6 | |
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| 7 | from M2Crypto import SSL |
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| 8 | from M2Crypto.SSL.SSLServer import SSLServer |
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| 9 | from SocketServer import TCPServer |
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| 10 | |
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| 11 | from service_error import service_error |
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| 12 | import xmlrpclib |
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| 13 | |
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| 14 | import os.path |
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| 15 | |
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| 16 | import logging |
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| 17 | import traceback |
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| 18 | |
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| 19 | # The SSL server here is based on the implementation described at |
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| 20 | # http://www.xml.com/pub/a/ws/2004/01/20/salz.html |
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| 21 | |
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| 22 | # Turn off the matching of hostname to certificate ID |
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| 23 | SSL.Connection.clientPostConnectionCheck = None |
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| 24 | |
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| 25 | class error_handlers: |
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| 26 | """ |
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| 27 | Class to encapsulate the debugging and non-debugging error handlers. |
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| 28 | """ |
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| 29 | def __init__(self, debug): |
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| 30 | """ |
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| 31 | Set the error handler |
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| 32 | """ |
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| 33 | if debug: self.handle_error = self.handle_error_debug |
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| 34 | else: self.handle_error = self.handle_error_standard |
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| 35 | |
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| 36 | def handle_error_debug(self, request=None, client_address=None): |
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| 37 | """ |
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| 38 | Debugging error handler. Prints a stack trace. |
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| 39 | """ |
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| 40 | print '-'*40 |
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| 41 | traceback.print_exc() |
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| 42 | print '-'*40 |
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| 43 | |
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| 44 | |
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| 45 | def handle_error_standard(self, request=None, address=None): |
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| 46 | """ |
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| 47 | Print standard error output, suitable for human consumption. |
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| 48 | """ |
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| 49 | if request or address: |
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| 50 | self.log.warn("[credd] Error on incoming connection: %s %s" % \ |
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| 51 | (request or "", address or "")) |
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| 52 | else: |
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| 53 | self.log.warn("[credd] Error on incoming connection " + \ |
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| 54 | "(Likely SSL error)") |
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| 55 | |
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| 56 | |
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| 57 | |
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| 58 | class server(SSLServer, error_handlers): |
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| 59 | """ |
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| 60 | Overloads a TCPServer to hold an XMLRPC implementation. The implementation |
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| 61 | needs to inclide an xmlrpc_services dist that maps from method name to |
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| 62 | callable mamber that takes a single parameter (usually a list or dict) and |
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| 63 | a certificate. |
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| 64 | """ |
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| 65 | def __init__(self, ME, handler, ssl_ctx, impl, debug=False): |
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| 66 | """ |
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| 67 | Create an SSL server that handles the transport in handler using the |
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| 68 | credentials in ssl_ctx, and interfacing to the implementation of fedd |
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| 69 | services in fedd. ME is the host port pair on which to bind. |
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| 70 | """ |
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| 71 | SSLServer.__init__(self, ME, handler, ssl_ctx) |
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| 72 | error_handlers.__init__(self, debug) |
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| 73 | self.impl = impl |
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| 74 | self.xmlrpc_methods = impl.xmlrpc_services |
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| 75 | self.log = logging.getLogger("creds") |
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| 76 | |
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| 77 | class simpleServer(TCPServer, error_handlers): |
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| 78 | """ |
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| 79 | Presents the same interface as server to a threaded TCP server. Allows a |
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| 80 | binding of the same implementation and handler classes to |
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| 81 | unencrypted/authenticated connections. |
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| 82 | """ |
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| 83 | def __init__(self, ME, handler, impl, debug=False): |
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| 84 | TCPServer.__init__(self, ME, handler) |
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| 85 | error_handlers.__init__(self, debug) |
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| 86 | self.impl = impl |
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| 87 | self.xmlrpc_methods = impl.xmlrpc_services |
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| 88 | self.log = logging.getLogger("creds") |
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| 89 | |
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| 90 | |
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| 91 | class xmlrpc_handler(BaseHTTPRequestHandler): |
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| 92 | """ |
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| 93 | Standard connection between XMLRPC and the services in impl. |
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| 94 | |
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| 95 | Much of this is boilerplate from |
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| 96 | http://www.xml.com/pub/a/ws/2004/01/20/salz.html |
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| 97 | """ |
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[ab52de1] | 98 | server_version = "credd/0.2 " + BaseHTTPRequestHandler.server_version |
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[02dcba5] | 99 | |
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| 100 | def send_xml(self, text, code=200): |
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| 101 | """Send an XML document as reply""" |
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| 102 | self.send_response(code) |
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| 103 | self.send_header('Content-type', 'text/xml; charset="utf-8"') |
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| 104 | self.send_header('Content-Length', str(len(text))) |
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| 105 | self.end_headers() |
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| 106 | self.wfile.write(text) |
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| 107 | self.wfile.flush() |
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| 108 | # Make sure to close the socket when we're done |
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| 109 | self.request.close() |
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| 110 | #self.request.socket.close() |
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| 111 | |
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| 112 | def do_POST(self): |
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| 113 | """Treat an HTTP POST request as an XMLRPC service call""" |
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| 114 | # NB: XMLRPC faults are not HTTP errors, so the code is always 200, |
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| 115 | # unless an HTTP error occurs, which we don't handle. |
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| 116 | |
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| 117 | resp = None |
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| 118 | data = None |
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| 119 | method = None |
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| 120 | cl = int(self.headers['content-length']) |
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| 121 | data = self.rfile.read(cl) |
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| 122 | |
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| 123 | try: |
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| 124 | params, method = xmlrpclib.loads(data) |
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| 125 | except xmlrpclib.ResponseError: |
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| 126 | data = xmlrpclib.dumps(xmlrpclib.Fault("Client", |
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| 127 | "Malformed request"), methodresponse=True) |
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| 128 | |
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| 129 | # Simple servers don't have peer certificates. |
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| 130 | if getattr(self.request, 'get_peer_cert', None): |
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| 131 | fid = self.request.get_peer_cert() |
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| 132 | else: |
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| 133 | fid = None |
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| 134 | |
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| 135 | |
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| 136 | if method != None: |
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| 137 | try: |
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| 138 | resp = self.xmlrpc_dispatch(method, params, fid) |
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| 139 | data = xmlrpclib.dumps((resp,), encoding='UTF-8', |
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| 140 | methodresponse=True) |
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| 141 | except xmlrpclib.Fault, f: |
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| 142 | data = xmlrpclib.dumps(f, methodresponse=True) |
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| 143 | resp = None |
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| 144 | |
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| 145 | self.send_xml(data) |
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| 146 | |
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| 147 | def log_request(self, code=0, size=0): |
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| 148 | """ |
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| 149 | Log request to the fedd logger |
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| 150 | """ |
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| 151 | self.server.log.info("Successful XMLRPC request code %d" % code) |
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| 152 | |
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| 153 | |
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| 154 | def xmlrpc_dispatch(self, method, req, fid): |
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| 155 | """ |
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| 156 | The connection to the implementation, using the method maps |
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| 157 | |
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| 158 | The implementation provides a mapping from XMLRPC method name to the |
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| 159 | method in the implementation that provides the service. |
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| 160 | """ |
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| 161 | if self.server.xmlrpc_methods.has_key(method): |
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| 162 | try: |
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| 163 | return self.server.xmlrpc_methods[method](req, fid) |
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| 164 | except service_error, e: |
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| 165 | raise xmlrpclib.Fault(e.code_string(), e.desc) |
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| 166 | |
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| 167 | else: |
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| 168 | raise xmlrpclib.Fault(100, "Unknown method: %s" % method) |
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| 169 | |
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