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Example code of amphp/websocket-client

Informations about the package websocket-client

websocket-client

AMPHP is a collection of event-driven libraries for PHP designed with fibers and concurrency in mind. amphp/websocket-client provides an asynchronous WebSocket client for PHP based on Amp. Websockets are full-duplex communication channels, which are mostly used for realtime communication where the HTTP request / response cycle has too much overhead. They're also used if the server should be able to push data to the client without an explicit request.

There are various use cases for a WebSocket client in PHP, such as consuming realtime APIs, writing tests for a WebSocket server, or controlling web browsers via their remote debugging APIs, which are based on WebSockets.

Installation

This package can be installed as a Composer dependency.

Requirements

Usage

Connecting

You can create new WebSocket connections using Amp\Websocket\connect() or calling connect() on an instance of WebsocketConnector. The connect() function accepts a string, PSR-7 UriInterface instance, or a WebsocketHandshake as first argument. URIs must use the ws or wss (WebSocket over TLS) scheme.

Custom connection parameters can be specified by passing a WebsocketHandshake object instead of a string as first argument, which can also be used to pass additional headers with the initial handshake. The second argument is an optional Cancellation which may be used to cancel the connection attempt.

Custom Connection Parameters

If necessary, a variety of connection parameters and behaviors may be altered by providing a customized instance of WebsocketConnectionFactory to the WebsocketConnector used to establish a WebSocket connection.

Sending Data

WebSocket messages can be sent using the Connection::sendText() and Connection::sendBinary() methods. Text messages sent with Connection::sendText() must be valid UTF-8. Binary messages send with Connection::sendBinary() can be arbitrary data.

Both methods return as soon as the message has been fully written to the send buffer. This does not mean that the message is guaranteed to have been received by the other party.

Receiving Data

WebSocket messages can be received using the Connection::receive() method. Connection::receive() returns a WebsocketMessage instance once the client has started to receive a message. This allows streaming WebSocket messages, which might be pretty large. In practice, most messages are rather small, and it's fine buffering them completely by either calling WebsocketMessage::buffer() or casting the object to a string. The maximum length of a message is defined by the option given to the WebsocketParserFactory instance provided to the WebsocketConnectionFactory (10 MiB by default).

Versioning

amphp/websocket-client follows the semver semantic versioning specification like all other amphp packages.

Security

If you discover any security related issues, please use the private security issue reporter instead of using the public issue tracker.

License

The MIT License (MIT). Please see LICENSE for more information.

All versions of websocket-client with dependencies

PHP Build Version
Package Version
Requires php Version >=8.1
amphp/amp Version ^3
amphp/byte-stream Version ^2.1
amphp/http Version ^2.1
amphp/http-client Version ^5
amphp/socket Version ^2.2
amphp/websocket Version ^2
league/uri Version ^6.8|^7.1
psr/http-message Version ^1|^2
revolt/event-loop Version ^1
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