edited Sep 11 '17 at 11:51. answered Jul 30 '12 at 11:07.
In every SDK it follows the same basic workflow: Establish a connection to PubNub with your own Application Keys (AppKeys) Compose and Publish a … So the trouble I am facing is with the client side which is to be written in java. In a Nutshell: HTTP Long Polling To overcome this deficiency, Web app developers can implement a technique called HTTP long polling, where the client polls the server requesting new information. Problem: When I do a "Delete" call to read message from a service bus queue, it immediately returns "HTTP/1.1 204 No Content", and the connection closes. 4,006 14 14 gold badges 40 40 silver badges 65 65 bronze badges. The server doesn’t close the connection until it has a message to send. My web server is located at port 7555, and I need to be able to make an HTTP long polling request to port 7555 from port 80 (browser) so I created a PHP script that calls my webservice. Check out this demo here that shows this exact example: streaming stock quotes.
Http Long Polling: AJAX but the server holds on to the response unless the server has an update, as soon as the server has an update, it sends it and then the client can send another request. See a good article, specially reprinted, the original address: long connection, short connection, long polling, short polling, websocket 1、 Short connection and long connection Short connection: TCP connection will be established for each HTTP request, which is easy to manage Long connection: you only need to establish a TCP connection once. After the change: long poll As you can see with regular polling new requests are sent very frequently (milliseconds apart) while with long polling, requests can be 5, 10, 20, or more seconds apart -- a significant reduction in the total number of requests without the loss of latency, i.e. So as per long polling, the client sends a request which is help by the server and the server responds to the request when an event occurs and then client sends a new request. It seems to be more complicated than I anticipated. It is defined to efficiently handle the data transmission between the server and the client. Http Long Polling: AJAX but the server holds on to the response unless the server has an update, as soon as the server has an update, it sends it and then the client can send another request. Kalamarico Kalamarico. add a comment | Your Answer Thanks for contributing an answer to Stack Overflow! long polling : le client ouvre une connexion et envoie une requête HTTP au serveur qui ne renvoie la réponse que si un événement force l'envoi de données au client ou après un certain timeout. When the wait time for the ReceiveMessage API action is greater than 0, long polling is in effect. Actually, i have implemented the long polling using the java concurrency: wait() & notify() system for java objects.
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