From 5720bc8b21f771e27a7f8871cb89347a08317c6a Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@spreadspace.org>
Date: Mon, 20 Oct 2014 03:03:10 +0200
Subject: daq: nginx-lua fetch looper works now

---
 src/daq/nginx-lua/s5-nginx-lua-fetch.py | 43 ++++++++++++++++++++++++++-------
 1 file changed, 34 insertions(+), 9 deletions(-)

(limited to 'src')

diff --git a/src/daq/nginx-lua/s5-nginx-lua-fetch.py b/src/daq/nginx-lua/s5-nginx-lua-fetch.py
index 4401e53..f5721d3 100755
--- a/src/daq/nginx-lua/s5-nginx-lua-fetch.py
+++ b/src/daq/nginx-lua/s5-nginx-lua-fetch.py
@@ -32,7 +32,7 @@
 #
 
 from errno import EINTR, EMSGSIZE, EAGAIN, EWOULDBLOCK, ECONNREFUSED, ENOBUFS
-from twisted.internet import protocol, reactor, unix
+from twisted.internet import protocol, unix, reactor, task
 from twisted.internet.protocol import Protocol
 from twisted.internet.defer import Deferred
 from twisted.web.client import Agent
@@ -43,6 +43,7 @@ from time import sleep
 import re
 import simplejson as json
 import datetime
+import time
 import dateutil.parser
 
 _MAX_PACKET_SIZE = 65536 # in bytes
@@ -173,12 +174,33 @@ class NGXLuaFetcher():
         self._conn = None
         self._connected = False
         self._url_re = None
+        self._looper = None
+        self._start_time = None
 
     def run(self):
         if self._initFetch():
+            # try to be aligned with current time
+            # this will eventually get out of sync but for now this is good enough
+            offset = self._duration - (time.time() % self._duration)
+            print 'SFive: %sZ -> will wait %0.2f seconds before starting looper (alignment)' % (datetime.datetime.utcnow().isoformat('T'), offset)
+            self._looper = task.LoopingCall(self._sendUpdate)
+            reactor.callLater(offset, self._startLooper)
             reactor.callWhenRunning(self._initSocket)
             reactor.run()
 
+    def _startLooper(self):
+        self._start_time = datetime.datetime.utcnow().replace(microsecond=0)
+        self._looper.start(self._duration, False)
+        print 'SFive: looper started at %sZ' % (self._start_time.isoformat('T'))
+
+    def _sendUpdate(self):
+        if self._connected:
+            self._sendDataset(self._start_time, self._duration, ClientList())
+        else:
+            print 'SFive: not connected - just clearing stats'
+
+        self._start_time = datetime.datetime.utcnow().replace(microsecond=0)
+
     def _initFetch(self):
         try:
             self._url_re = re.compile(self._nameformat)
@@ -211,19 +233,22 @@ class NGXLuaFetcher():
             print 'SFive: regex error: %s' % (e)
 
         try:
-            print "url='%s' -> contend-id: '%s', format: '%s', quality: '%s'" % (data['url'],
-                                            streamerid['content'], streamerid['format'], streamerid['quality'])
-            # self._clients.update(data)
-            if self._conn and self._connected:
+            ts = dateutil.parser.parse(data['time'])
+            ts = (ts - ts.utcoffset()).replace(tzinfo=None)
+            if self._start_time and ts >= self._start_time:
+                print "url='%s' -> contend-id: '%s', format: '%s', quality: '%s'" % (data['url'],
+                                streamerid['content'], streamerid['format'], streamerid['quality'])
                 print "    --> %(time)s: from %(client)s/%(port)d (%(ua)s) %(status)d:  %(bytes-sent)d bytes" % data
-                self._sendDataset(dateutil.parser.parse(data['time']), 1, ClientList())
+                # self._clients.update(data)
 
         except KeyError as e:
-            print 'SFive: %s' % (e)
+            print 'SFive: %s - ignoring dataset' % (e)
         except ValueError as e:
-            print 'SFive: %s' % (e)
+            print 'SFive: %s - ignoring dataset' % (e)
         except AttributeError as e:
-            print 'SFive: %s' % (e)
+            print 'SFive: %s - ignoring dataset' % (e)
+        except TypeError as e:
+            print 'SFive: %s - ignoring dataset' % (e)
 
     def close(self):
         if self._conn and self._connected:
-- 
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