Add preliminary support for logging

Current logging mechanism makes use of Python's logging module.
MySQL logging handler inserts log entries to MySQL server and
another logging handler is used to stream events to web interface
via nginx streaming push.

certidude/api/__init__.py

@@ -35,7 +35,7 @@ class SessionResource(object):
     @event_source
     def on_get(self, req, resp):
         return dict(
-            username=req.context.get("user")[0],
+            username=req.context.get("user"),
             event_channel = config.PUSH_EVENT_SOURCE % config.PUSH_TOKEN,
             autosign_subnets = config.AUTOSIGN_SUBNETS,
             request_subnets = config.REQUEST_SUBNETS,
@@ -78,6 +78,7 @@ def certidude_app():
     from .request import RequestListResource, RequestDetailResource
     from .lease import LeaseResource
     from .whois import WhoisResource
+    from .log import LogResource
 
     app = falcon.API()
 
@@ -89,10 +90,51 @@ def certidude_app():
     app.add_route("/api/signed/", SignedCertificateListResource())
     app.add_route("/api/request/{cn}/", RequestDetailResource())
     app.add_route("/api/request/", RequestListResource())
+    app.add_route("/api/log/", LogResource())
     app.add_route("/api/", SessionResource())
 
     # Gateway API calls, should this be moved to separate project?
     app.add_route("/api/lease/", LeaseResource())
     app.add_route("/api/whois/", WhoisResource())
 
+    """
+    Set up logging
+    """
+
+    from certidude import config
+    from certidude.mysqllog import MySQLLogHandler
+    from datetime import datetime
+    import logging
+    import socket
+    import json
+
+
+    class PushLogHandler(logging.Handler):
+        def emit(self, record):
+            from certidude.push import publish
+            print("EVENT HAPPENED:", record.created)
+            publish("log-entry", dict(
+                created = datetime.fromtimestamp(record.created),
+                message = record.msg % record.args,
+                severity = record.levelname.lower()))
+
+    sql_handler = MySQLLogHandler(config.DATABASE_POOL)
+    push_handler = PushLogHandler()
+
+    for facility in "api", "cli":
+        logger = logging.getLogger(facility)
+        logger.setLevel(logging.DEBUG)
+        logger.addHandler(sql_handler)
+        logger.addHandler(push_handler)
+
+
+    logging.getLogger("cli").info("Started Certidude at %s", socket.getaddrinfo(socket.gethostname(), 0, flags=socket.AI_CANONNAME)[0][3])
+
+    import atexit
+
+    def exit_handler():
+        logging.getLogger("cli").info("Shutting down Certidude")
+
+    atexit.register(exit_handler)
+
     return app