B4J Question HTTP socket client

This is not how http communication works. The client sends a request and the server replies with the response.

WebSockets for example do allow you to keep an open connection and then the server can push data to the client. However you need to first find out how the server is supposed to work.

Thank you Erel.
Are there any way to emulate HTTP over TcpSockets (a level below HTTP) ?

Roberto Macagno said:

Are there any way to emulate HTTP over TcpSockets (a level below HTTP)

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What would that solve? Technically, HTTP is just a layer above TCP sockets. As per @Erel, what API is the server providing?

The server sends me an HTTP request over the persistent connection and I must generate and send an HTTP response (with specific data related with the request).

Roberto Macagno said:

The server sends me an HTTP request over the persistent connection

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Classical HTTP has no persistent connection. HTTP/2 does have persistent connections and the server can push items to the client, but that involves Service Workers which are implemented in JavaScript (https://developers.google.com/web/fundamentals/push-notifications/). Another approach to persistent connection is the usage of WebSocket technology (https://www.b4x.com/android/forum/threads/39811/#content). So depending on what the server uses to communicate, B4J may not be the optimal platform for your solution. Is this server platform accessible from the outside? If so, what is it? I can't believe that all the info they give is "use a persistent connection and respond to our server's requests." That's pretty crappy.

Roberto Macagno said:

The server sends me an HTTP request over the persistent connection and I must generate and send an HTTP response (with specific data related with the request).

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Reading this again, it almost sounds like you should have a HTTP server that they request information via HTTP (be it GET/POST/etc) and you should be creating a HTTP response.

You can sign up at www.one.com they support a webhotel with PHP and a mySQL server. You register a membership yearly. You can use a timer to contact the server and perform whatever you need by using GET or POST and have PHP handle the requests. You can use OkHttpUtils2 for this. In case you want to guarantee uptime.