socket.connectionStatus().subscribe((status) => console.log("Connection status changed: ", status));
results in:
Connection status changed: Object { kind: "CONNECTED" }
Connection status changed: Object { kind: "CONNECTED" }
The documentation of connectionStatus() states:
Returns a Flowable that immediately publishes the current connection
* status and thereafter updates as it changes. [...]
Related
I am trying to use lwIP for a client, which sends data to mosquitto broker on stm32f407 discovery.
Mqtt application is implemented at lwIP. I just use them like that at main after initializing.
mqtt_client_t static_client;
Afterwards, with USART interrupt, I call
example_do_connect(&static_client); example_publish(&static_client,0);
Which calls those functions:
{
struct mqtt_connect_client_info_t ci;
err_t err;
/* Setup an empty client info structure */
memset(&ci, 0, sizeof(ci));
/* Minimal amount of information required is client identifier, so set it here */
ci.client_id = "lwip_test";
ci.client_user = NULL;
ci.client_pass = NULL;
/* Initiate client and connect to server, if this fails immediately an error code is returned
otherwise mqtt_connection_cb will be called with connection result after attempting
to establish a connection with the server.
For now MQTT version 3.1.1 is always used */
err = mqtt_client_connect(client, &serverIp, MQTT_PORT, mqtt_connection_cb, 0, &ci);
/* For now just print the result code if something goes wrong*/
if(err != ERR_OK) {
}
}
and
void example_publish(mqtt_client_t *client, void *arg)
{
const char *pub_payload= "stm32_test";
err_t err;
u8_t qos = 2; /* 0 1 or 2, see MQTT specification */
u8_t retain = 0; /* No don't retain such crappy payload... */
err = mqtt_publish(client, "pub_topic", pub_payload, strlen(pub_payload), qos, retain, mqtt_pub_request_cb, arg);
if(err != ERR_OK) {
// printf("Publish err: %d\n", err);
err = ERR_OK;
}
}
/* Called when publish is complete either with sucess or failure */
static void mqtt_pub_request_cb(void *arg, err_t result)
{
if(result != ERR_OK) {
// printf("Publish result: %d\n", result);
}
}
I am able to ping board, my IP adress has been assigned in main by using IP_ADDR4(&serverIp, 192,168,2,97);
I've used all needed functions like MX_LWIP_Init(), MX_LWIP_Process() and actually i am even able to implement a TCP client, which is working nice. So internet connection is well, but I guess, there is a point that i missed in mqttclient. Callbacks is also have done by Erik Anderssen's guide.
When i try to subscribe to board's IP by using mosquitto, Error: no connection could be made because the target actively refused it. If you notice some point that i have missed or have an idea, please let me know.
Any help will appreciated, thanks in advance.
I had a similar problem that the server refused the connection when QoS (quality of service) was set to 2, but the server needed it to be 0. Try changing the parameter qos in the line in the connection callback to either 0 or 1:
err = mqtt_subscribe(mqtt.client, "topic", qos, MqttApp_SubscribeRequestCallback, arg);
Same applies to the parameter qos in the publish function:
change u8_t qos = 2; to u8_t qos = 0; (or 1 - whatever your server requires)
Hope it helps. Cheers.
I have this javascript code that send data to channels
// Note that the path doesn't matter for routing; any WebSocket
// connection gets bumped over to WebSocket consumers
socket = new WebSocket("ws://" + window.location.host + "/chat/");
socket.onmessage = function(e) {
alert(e.data);
}
socket.onopen = function() {
socket.send({"test":"data"});
}
// Call onopen directly if socket is already open
if (socket.readyState == WebSocket.OPEN) socket.onopen();
I'm curios how from message I can get the json {"test":"data"}
here's the view
# Connected to websocket.connect
#channel_session
def ws_connect(message, key):
# Accept connection
message.reply_channel.send({"accept": True})
You implemented the connection callback, but did not implement what should happen when a message arrives the server endpoint. Add add message receive function:
def on_receive(message):
print('test received: {}'.format(message.content['test']))
Register the function in routing.py:
channel_routing = [
route("websocket.connect", ws_connect),
route("websocket.receive", on_receive),
]
The JSON message you send will be stored in message.content which is basically just a python dict.
I have a PhoneGap application and I want to open a socket to a endpoint using sockets-for-cordova plugin:
var socket = new Socket();
socket.open(
"192.168.2.1",
80,
function () {
// invoked after successful opening of socket
console.log("connection");
$scope.$apply();
},
function (errorMessage) {
// invoked after unsuccessful opening of socket
console.log("error");
$scope.$apply();
socket.shutdownWrite();
});
After I use this function to handle messages
socket.onData = function (data) {
// received message
}
On Android it works well, sending and receiving message, unfortunately on iOS it simply doesn't work, not receive any message at all or it close the socket itself.
I can see "connection" message, so I guess that the socket is created.
I've downloaded Mosca (^1.1.2), MQTT (via npm) and Paho. When I create a simple broker as shown here: http://thejackalofjavascript.com/getting-started-mqtt/ (last 3 codes). It works all fine. My problem is when I try to implement client in the browser using Paho. with this code:
// Create a client instance
var client = new Paho.MQTT.Client('127.0.0.1', 4883, "clientId-1");
// set callback handlers
client.onConnectionLost = onConnectionLost;
client.onMessageArrived = onMessageArrived;
var options = {
//connection attempt timeout in seconds
timeout: 3,
//Gets Called if the connection has successfully been established
onSuccess: function () {
console.log("onConnect");
client.subscribe("testtopic/#");
},
//Gets Called if the connection could not be established
onFailure: function (message) {
console.log("Connection failed: " + message.errorMessage);
}
};
// connect the client
client.connect(options);
// called when the client connects
function onConnect() {
console.log("onConnect");
client.subscribe("testtopic/#");
}
// called when the client loses its connection
function onConnectionLost(responseObject) {
if (responseObject.errorCode !== 0) {
console.log("onConnectionLost:"+responseObject.errorMessage);
}
}
// called when a message arrives
function onMessageArrived(message) {
console.log(message.payload);
}
I always get this message: "Connection failed: AMQJSC0001E Connect timed out."
When I change '127.0.0.1' to a online broker, it works. So, I'm guessing my problem is with allowing ports in my broker.
Does anyone know how to solve this problem?
I have an app built on spray 1.3.3 and I'm trying to stop http server by sending message.
Official documentation says:
Stopping. To explicitly stop the server, send an Http.Unbind command to
the HttpListener instance (the ActorRef for this instance is available
as the sender of the Http.Bound confirmation event from when the
server was started).
Here is how i the start server:
(IO(Http) ? Http.Bind(httpListener, interface = iface, port = port)).map {
case m: Http.Bound => println(s"Success $iface:$port")
case fail : Http.CommandFailed => println(s"Bad try :(")
}
I tried to send message Http.Unbind to httpListener but with no success. Seems to be it's not that actor
May be i need to extract somehow sender ref of Http.Bound message? But how?
Here is my httpListener's head:
class MyHttpListener extends HttpServiceActor {
import context.dispatcher
def receive = runRoute(
path("shutdown") {
get {
actors.httpListener ! Http.Unbind
complete("Stopping server")
}
}
Anyway, i just want to send http request to /shutdown and have my application be down
The sender of the Bound message should be the Spray listener, so when receiving that message you can capture it.
You did not post your full actor so this is a little different but I hope this helps.
class MyStarter extends Actor {
// this will be the listener
var myListener: ActorRef = _
override def preStart(): Unit = {
implicit val system = context.system
IO(Http) ! Http.Bind(...)
}
override def receive: Receive = {
case msg: Bound =>
// when you receive the Bound message it was sent by the listener
myListener = sender()
...
case ... => ...
}
}