July 2025
Intermediate to advanced
414 pages
11h 21m
Spanish
Content preview from Aprendizaje de estilos de API
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Capítulo 10. WebSocket
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Las API de basadas en HTTP funcionan siguiendo el modelo solicitud-respuesta, en el que el cliente envía una solicitud al servidor y espera la respuesta correspondiente. En HTTP, un servidor no puede iniciar una conexión ni enviar una respuesta a un cliente sin que éste haga una solicitud previa. Un servidor puede "enviar" información al cliente varias veces, utilizando métodos como los eventos del lado del servidor o el streaming HTTP, pero estos métodos siguen requiriendo una solicitud inicial del cliente. Alternativamente, un cliente puede sondear al servidor (enviar solicitudes) para obtener nueva información, utilizando el sondeo corto (se establece una nueva conexión TCP para cada solicitud) o el sondeo largo (se reutiliza una única conexión TCP de larga duración para múltiples solicitudes).
El objetivo de WebSocket es proporcionar una comunicación bidireccional simultánea. En WebSocket, tanto el cliente como el servidor pueden enviarse mensajes de forma independiente, sin atenerse al modelo solicitud-respuesta. Esto se consigue cambiando de HTTP a un protocolo personalizado basado en TCP (WebSocket), que admite un modo de transmisión full-duplex.
Cuando se habla de WebSocket, a menudo se menciona la comunicación asíncrona.1 WebSocket no es intrínsecamente asíncrono.2 Existen implementaciones síncronas de clientes y servidores WebSocket, ...
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