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real-time-applications-using-websockets-with-aws-api-gateway-and-lambda.md
WebSocket API 概念 WebSocket API 由一个或多个路由组成。请求通过路由表达式选择的特定路由,表达式根据请求匹配与路由的 routeKey 相对应的值。比如,如果请求的 JSON 消息包含 action 属性,想要根据不同的 action 执行不同的操作,那么可以通过 $ {request.body.action} 路由表达式来匹配路由执行相应的操作。
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