hooglevents.blogg.se - Android web server how to keep session data

#Android web server how to keep session data android#

The textview will show the result from the server.

#Android web server how to keep session data android#

In your android manifest, add the internet permission as follows: Step 3: Design LayoutĬreate a layout with a textview and a button. In your app-level adle add the following implementation statement: implementation '3:okhttp:3.6.0' Step 2: Add Internet Permission The url(ws://) is used to setup websockets. In this tutorial you will learn how to use websockets using OkHTTP. Better compression effect: Compared with HTTP compression, Websocket can use the context of the previous content with proper extension support, and can significantly improve the compression rate when transferring similar data.Better binary support: Websocket defines binary frames, which can handle binary content more easily than HTTP.The HTTP request may need to carry status information in each request (such as identity authentication, etc.) Keep the connection state: Unlike HTTP, Websocket needs to create a connection first, which makes it a stateful protocol, and then part of the state information can be omitted when communicating.

Stronger real-time performance: Since the protocol is full-duplex, the server can actively send data to the client at any time.

Less control overhead: After the connection is created, when data is exchanged between the server and the client, the data packet header used for protocol control is relatively small.

If wss is used for encryption, the server web address is URL, such as: ws://wss://Advantages of Websocket By default, the Websocket protocol uses port 80 when running on top of TLS, port 443 is used by default. Websocket uses the same TCP port as HTTP, which can bypass most firewall restrictions. Thus the client and server only need to complete a handshake, and a persistent connection can be created directly between the two, and two-way data transfer carried out. This avoids the overhead of sending an additional HTTP request to check if there are newer updates. Thus the app auto-updates itself whenever newer updates are available. Rather than long polling to get updates for example from a livescore app, you can use websockets to create a persistent connection between the client and the server. This protocol defines an API that establishes a "socket" connection between a web browser and a server. It provides a full-duplex communication channels over a single TCP connection.

WebSocket is a protocol that makes it possible to open a two-way interactive communication session between the client and the server.