http bugfix thx wa8wg for the report

op25/gr-op25_repeater/apps/http.py

@@ -25,12 +25,14 @@ import re
 import json
 import socket
 import traceback
+import threading
 
 from gnuradio import gr
 from waitress.server import create_server
 
 my_input_q = None
 my_output_q = None
+my_recv_q = None
 my_port = None
 
 """
@@ -62,7 +64,7 @@ def static_file(environ, start_response):
     return status, content_type, output
 
 def post_req(environ, start_response, postdata):
-    global my_input_q, my_output_q, my_port
+    global my_input_q, my_output_q, my_recv_q, my_port
     try:
         data = json.loads(postdata)
         msg = gr.message().make_from_string(str(data['command']), -2, data['data'], 0)
@@ -74,8 +76,8 @@ def post_req(environ, start_response, postdata):
         sys.stderr.write('*** end traceback ***\n')
 
     resp_msg = []
-    while not my_input_q.empty_p():
-        msg = my_input_q.delete_head()
+    while not my_recv_q.empty_p():
+        msg = my_recv_q.delete_head()
         if msg.type() == -4:
             resp_msg.append(json.loads(msg.to_string()))
     status = '200 OK'
@@ -111,9 +113,16 @@ def application(environ, start_response):
         sys.exit(1)
     return result
 
+def process_qmsg(msg):
+    if my_recv_q.full_p():
+        my_recv_q.delete_head_nowait()   # ignores result
+    if my_recv_q.full_p():
+        return
+    my_recv_q.insert_tail(msg)
+
 class http_server(object):
     def __init__(self, input_q, output_q, endpoint, **kwds):
-        global my_input_q, my_output_q, my_port
+        global my_input_q, my_output_q, my_recv_q, my_port
         host, port = endpoint.split(':')
         if my_port is not None:
             raise AssertionError('this server is already active on port %s' % my_port)
@@ -121,7 +130,24 @@ class http_server(object):
         my_output_q = output_q
         my_port = int(port)
 
+        my_recv_q = gr.msg_queue(10)
+        self.q_watcher = queue_watcher(my_input_q, process_qmsg)
+
         self.server = create_server(application, host=host, port=my_port)
 
     def run(self):
         self.server.run()
+
+class queue_watcher(threading.Thread):
+    def __init__(self, msgq,  callback, **kwds):
+        threading.Thread.__init__ (self, **kwds)
+        self.setDaemon(1)
+        self.msgq = msgq
+        self.callback = callback
+        self.keep_running = True
+        self.start()
+
+    def run(self):
+        while(self.keep_running):
+            msg = self.msgq.delete_head()
+            self.callback(msg)