diff --git a/pymanager/manager.py b/pymanager/manager.py
index 740c5a2..adb9ffb 100755
--- a/pymanager/manager.py
+++ b/pymanager/manager.py
@@ -172,7 +172,7 @@ class ManageHttpRequest(http.server.SimpleHTTPRequestHandler):
         self.send_header('Content-type', 'application/json')
         self.end_headers()
 
-    def _command_log(self):
+    def _extract_input_data(self):
         """ sub request log (send log on specific process) """
         if 'content-type' in self.headers:
             ctype = self.headers['content-type']
@@ -180,19 +180,25 @@ class ManageHttpRequest(http.server.SimpleHTTPRequestHandler):
             ctype = 'text'
         if ctype != 'application/json':
             logging.error("Received request with bad content-type")
-            self.send_response(400, "bad content-type")
+            self.send_error(400, "bad content-type")
             self.end_headers()
-            return
+            return None
         try:
             sizemsg = int(self.headers['content-length'])
         except (TypeError, KeyError, ValueError):
             logging.error("Received request with bad content-length")
-            self.send_response(400, "bad content-length")
+            self.send_error(400, "bad content-length")
             self.end_headers()
-            return
-
+            return None
         msg = self.rfile.read(sizemsg)
         msgjson = json.loads(msg.decode())
+        return msgjson
+
+    def _command_log(self):
+        """ sub request log (send log on specific process) """
+        msgjson = self._extract_input_data()
+        if msgjson == None:
+            return
 
         logging.debug(msgjson)
         if 'name' not in msgjson:
@@ -269,25 +275,9 @@ class ManageHttpRequest(http.server.SimpleHTTPRequestHandler):
 
     def _send_action(self):
         """ send specific action on one program """
-        if 'content-type' in self.headers:
-            ctype = self.headers['content-type']
-        else:
-            ctype = 'text'
-        if ctype != 'application/json':
-            logging.error("Bad content-type")
-            self.send_response(400, "bad content-type")
-            self.end_headers()
+        msgjson = self._extract_input_data()
+        if msgjson == None:
             return
-        try:
-            sizemsg = int(self.headers['content-length'])
-        except (TypeError, KeyError, ValueError):
-            logging.error("Bad content-length")
-            self.send_response(400, "bad content-length")
-            self.end_headers()
-            return
-
-        msg = self.rfile.read(sizemsg)
-        msgjson = json.loads(msg.decode())
 
         logging.debug(msgjson)
         if 'name' not in msgjson:
@@ -305,16 +295,10 @@ class ManageHttpRequest(http.server.SimpleHTTPRequestHandler):
             logging.error("Missing param action '%s'" % name)
             return
 
-        action = ''
-        try:
-            action = msgjson['action']
-        except KeyError:
-            logging.error("Impossible to read first-line '%s'" % msgjson['action'])
-            self.send_error(400, 'Impossible to read action')
-            return
+        action = msgjson['action']
         logging.debug("%s:%s" % (name, action))
         self.server.listEvent[name].set()
-        self.server.listQueueIn[name].put("ACTION %s" % action)
+        self.server.listQueueIn[name].put("STDIN %s" % action)
         logging.debug("message envoye: %s" % (name))
 
         try:
@@ -331,24 +315,10 @@ class ManageHttpRequest(http.server.SimpleHTTPRequestHandler):
 
         :param str command: command (START, STOP, STATUS, ... )
         """
-        if 'content-type' in self.headers:
-            ctype = self.headers['content-type']
-        else:
-            ctype = 'text'
-        if ctype != 'application/json':
-            logging.error("Bad content-type")
-            self.send_response(400, "Bad content-type")
-            self.end_headers()
+        msgjson = self._extract_input_data()
+        if msgjson == None:
             return
-        try:
-            sizemsg = int(self.headers['content-length'])
-        except (TypeError,  KeyError,  ValueError):
-            logging.error("Bad content-length")
-            self.send_response(400, "Bad content-length")
-            self.end_headers()
-            return
-        msg = self.rfile.read(sizemsg)
-        msgjson = json.loads(msg.decode())
+
         if 'name' not in msgjson:
             self.send_error(400, 'Missing param name')
             logging.error("Missing param name")
@@ -743,7 +713,7 @@ class ManageCommand():
                 msg = self.queueIn.get(timeout=4)
             except queue.Empty:
                 self.event.clear()
-                logging.debug("pas de message recu pour %s" % self.name)
+                logging.debug("[%s] Queue empty (no message)" % self.name)
                 return
             logging.debug("command : '%s'" % msg)
             command = msg.split()[0]
@@ -763,9 +733,11 @@ class ManageCommand():
                 try:
                     firstline = int(msg.split(maxsplit=1)[1])
                 except ValueError:
+                    logging.warning("Bad value for param first-line (need integer)")
                     firstline = 0
                 self.queueOut.put(self.getlog(firstline))
             else:
+                logging.warning("Bad command (%s)" % command)
                 self.queueOut.put("error : command unknown")
             self.event.clear()
         self.stop()
@@ -931,6 +903,7 @@ class Manager():
                                                           queueOut,
                                                           event))
             threadCommand.start()
+            self.threadCommand.append(threadCommand)
             if self.launch_program:
                 event.set()
                 queueIn.put("START")
@@ -938,10 +911,9 @@ class Manager():
                     item = queueOut.get(timeout=4)
                 except queue.Empty:
                     item = ""
-                    logging.debug("pas de message recu pour %s" % name)
+                    logging.debug("[%s] Queue empty (no message)" % name)
                     return
                 logging.info("%s => %s" % (name,  item))
-            self.threadCommand.append(threadCommand)
 
     def receive_signal(self, signum, frame):
         """ Managed signal """