Publish/subscribe messaging for realtime digital experiences

      var ably = new Ably.Realtime('1WChTA.Cre_PQ:yodkVsp2OeURrEgz5m4iw3yVv4Fo8E7sgcJMIvzvs_A');
var channel = ably.channels.get('cub-law');

// Publish a message to the cub-law channel
channel.publish('greeting', 'hello');
    

      AblyRealtime ably = new AblyRealtime("1WChTA.Cre_PQ:yodkVsp2OeURrEgz5m4iw3yVv4Fo8E7sgcJMIvzvs_A");
Channel channel = ably.channels.get("cub-law");

/* Publish a message to the cub-law channel */
channel.publish("greeting", "hello");
    

      ARTRest *ably = [[ARTRealtime alloc] initWithKey:@"1WChTA.Cre_PQ:yodkVsp2OeURrEgz5m4iw3yVv4Fo8E7sgcJMIvzvs_A"];
ARTRealtimeChannel *channel = [ably.channels get:@"cub-law"];

// Publish a message to the cub-law channel
[channel publish:@"greeting" data:@"hello"];
    

      let ably = ARTRealtime(key: "1WChTA.Cre_PQ:yodkVsp2OeURrEgz5m4iw3yVv4Fo8E7sgcJMIvzvs_A")
let channel = ably.channels.get("cub-law")

/// Publish a message to the cub-law channel
channel.publish("greeting", data: "hello")
    

      var ably = new AblyRealtime("1WChTA.Cre_PQ:yodkVsp2OeURrEgz5m4iw3yVv4Fo8E7sgcJMIvzvs_A");
var channel = ably.Channels.Get("cub-law");

// Publish a message to the cub-law channel
channel.Publish("greeting", "hello");
    

      var ably = new require('ably').Realtime('1WChTA.Cre_PQ:yodkVsp2OeURrEgz5m4iw3yVv4Fo8E7sgcJMIvzvs_A');
var channel = ably.channels.get('cub-law');

// Publish a message to the cub-law channel
channel.publish('greeting', 'hello');
    

      $ably = new Ably\AblyRest('1WChTA.Cre_PQ:yodkVsp2OeURrEgz5m4iw3yVv4Fo8E7sgcJMIvzvs_A');
$channel = $ably->channel('cub-law');

// Publish a message to the cub-law channel
$channel->publish('greeting', 'Hello!');
    

      AblyRealtime ably = new AblyRealtime("1WChTA.Cre_PQ:yodkVsp2OeURrEgz5m4iw3yVv4Fo8E7sgcJMIvzvs_A");
Channel channel = ably.channels.get("cub-law");

/* Publish a message to the cub-law channel */
channel.publish("greeting", "hello");
    

      # Need to wrap within an EventMachine reactor which provides
# an asynchronous evented framework for the library to run within.
EventMachine.run do
  ably = Ably::Realtime.new('1WChTA.Cre_PQ:yodkVsp2OeURrEgz5m4iw3yVv4Fo8E7sgcJMIvzvs_A')
end
channel = ably.channels.get('cub-law')

# Publish a message to the cub-law channel
channel.publish 'greeting', 'hello'
    

      ably = AblyRest('1WChTA.Cre_PQ:yodkVsp2OeURrEgz5m4iw3yVv4Fo8E7sgcJMIvzvs_A')
channel = ably.channels.get('cub-law')

# Publish a message to the cub-law channel
channel.publish('greeting', 'hello')
    

      client, err := ably.NewRealtime(ably.WithKey("1WChTA.Cre_PQ:yodkVsp2OeURrEgz5m4iw3yVv4Fo8E7sgcJMIvzvs_A"))
channel := client.Channels.Get("cub-law")

/* Publish a message to the cub-law channel */
channel.Publish("greeting", "hello")
    

      # Copy and paste the curl command below into your console to try this demo now
# Publish a message to the cub-law channel

curl -X POST https://rest.ably.io/channels/cub-law/messages \
  -u '1WChTA.Cre_PQ:yodkVsp2OeURrEgz5m4iw3yVv4Fo8E7sgcJMIvzvs_A' \
  --data 'name=greeting&data=hello'
    

      var ably = new Ably.Realtime('1WChTA.Cre_PQ:yodkVsp2OeURrEgz5m4iw3yVv4Fo8E7sgcJMIvzvs_A');
var channel = ably.channels.get('cub-law');

// Subscribe to messages on channel
channel.subscribe('greeting', function(message) {
  alert(message.data);
});
    

      AblyRealtime ably = new AblyRealtime("1WChTA.Cre_PQ:yodkVsp2OeURrEgz5m4iw3yVv4Fo8E7sgcJMIvzvs_A");
Channel channel = ably.channels.get("cub-law");

/* Subscribe to messages on channel */

MessageListener listener;
listener = new MessageListener() {
  @Override
  public void onMessage(Message message) {
    System.out.print(message.data);
  };
};
channel.subscribe("greeting", listener);
    

      ARTRest *ably = [[ARTRealtime alloc] initWithKey:@"1WChTA.Cre_PQ:yodkVsp2OeURrEgz5m4iw3yVv4Fo8E7sgcJMIvzvs_A"];
ARTRealtimeChannel *channel = [ably.channels get:@"cub-law"];

// Subscribe to messages on channel
[channel subscribe:@"greeting" callback:^(ARTMessage *message) {
  NSLog(@"%@", message.data);
}];
    

      let ably = ARTRealtime(key: "1WChTA.Cre_PQ:yodkVsp2OeURrEgz5m4iw3yVv4Fo8E7sgcJMIvzvs_A")
let channel = ably.channels.get("cub-law")

// Subscribe to messages on channel
channel.subscribe("greeting") { message in
  print("\(message.data)")
}
    

      var ably = new AblyRealtime("1WChTA.Cre_PQ:yodkVsp2OeURrEgz5m4iw3yVv4Fo8E7sgcJMIvzvs_A");
var channel = ably.Channels.Get("cub-law");

/* Subscribe to messages on channel */

channel.Subscribe("greeting", (message) => {
  Console.WriteLine(message.data);
});
    

      var ably = new require('ably').Realtime('1WChTA.Cre_PQ:yodkVsp2OeURrEgz5m4iw3yVv4Fo8E7sgcJMIvzvs_A');
var channel = ably.channels.get('cub-law');

// Subscribe to messages on channel
channel.subscribe('greeting', function(message) {
  console.log(message.data);
});
    

      $ably = new Ably\AblyRest('1WChTA.Cre_PQ:yodkVsp2OeURrEgz5m4iw3yVv4Fo8E7sgcJMIvzvs_A');
$channel = $ably->channel('cub-law');

// Subscribe only supported by Realtime client library SDKs
// such as Javascript, iOS, Android, PHP supports history
// to retrieve messages over REST

$messagesPage = $channel->history();
echo($messagesPage->items[0]->data);
    

      AblyRealtime ably = new AblyRealtime("1WChTA.Cre_PQ:yodkVsp2OeURrEgz5m4iw3yVv4Fo8E7sgcJMIvzvs_A");
Channel channel = ably.channels.get("cub-law");

/* Subscribe to messages on channel */

MessageListener listener;
listener = new MessageListener() {
  @Override
  public void onMessage(Message message) {
    System.out.print(message.data);
  };
};
channel.subscribe("greeting", listener);
    

      # Need to wrap within an EventMachine reactor which provides
# an asynchronous evented framework for the library to run within.
EventMachine.run do
  ably = Ably::Realtime.new('1WChTA.Cre_PQ:yodkVsp2OeURrEgz5m4iw3yVv4Fo8E7sgcJMIvzvs_A')
end
channel = ably.channels.get('cub-law')

# Subscribe to messages on channel

channel.subscribe 'greeting' do |message|
  puts message.data
end
    

      ably = AblyRest('1WChTA.Cre_PQ:yodkVsp2OeURrEgz5m4iw3yVv4Fo8E7sgcJMIvzvs_A')
channel = ably.channels.get('cub-law')

# Subscribe only supported by Realtime client library SDKs
# such as Javascript, iOS, Android Python supports history
# to retrieve messages over REST

message_page = channel.history()
print(message_page.items[0].data)
    

      client, err := ably.NewRealtime(ably.WithKey("1WChTA.Cre_PQ:yodkVsp2OeURrEgz5m4iw3yVv4Fo8E7sgcJMIvzvs_A"))
channel := client.Channels.Get("cub-law")

/* Subscribe to messages on channel */

sub, err := channel.Subscribe()
if err != nil {
    // Handle err
}
for msg := range sub.MessageChannel() {
    fmt.Println(msg.Data)
}
    

      # Your browser is already subscribed to messages on channel cub-law
# Copy and paste the curl command into your console now to see Ably realtime in action