前端实现简单的sse封装方式(React hook Vue3)

import {useState, useRef, useEffect} from 'react'

const useSSE = (url: string) => {
    const source = useRef<EventSource | null>(null)
    //接收到的sse数据
    const [sseData, setSseData] = useState({})

    // sse状态
    const [sseReadyState, setSseReadyState] = useState({
        key: 0,
        value: '正在链接中',
    })

    const creatSource = () => {
        const stateArr = [
            {key: 0, value: '正在链接中'},
            {key: 1, value: '已经链接并且可以通讯'},
            {key: 2, value: '连接已关闭或者没有链接成功'},
        ]

        try {
            source.current = new EventSource(url)
            source.current.onopen = (_e) => {
                setSseReadyState(stateArr[source.current?.readyState ?? 0])
            }

            source.current.onerror = (e) => {
                setSseReadyState(stateArr[source.current?.readyState ?? 0])
            }
            source.current.onmessage = (e) => {
                setSseData({...JSON.parse(e.data)})
            }
        } catch (error) {
            console.log(error)
        }
    }

    const sourceInit = () => {
        if (!source.current || source.current.readyState === 2) {
            creatSource()
        }
    }

    //  关闭 WebSocket
    const closeSource = () => {
        source.current?.close()
    }

    //重连
    const reconnectSSE = () => {
        try {
            closeSource()
            source.current = null
            creatSource()
        } catch (e) {
            console.log(e)
        }
    }

    useEffect(() => {
        sourceInit()
    },[])

    return {
        sseData,
        sseReadyState,
        closeSource,
        reconnectSSE,
    }
}
export default useSSE

import React, { useState, useEffect } from 'react'
import useWebsocket from '../../tools/webSocket'
export default function () {
	const {sseData,sseReadyState, closeSource,reconnectSSE} = useSSE(url)

	useEffect(() => {
        console.log( '当前状态'，sseReadyState)
    },[sseReadyState])

	useEffect(() => {
        console.log( '接收到的数据'，sseData)
    }, [sseData])
}

import { ref } from "vue";

const useSSE = (url: string) => {
  const source = ref<EventSource | null>(null);

  //接收到的sse数据
  const sseData = ref({});

  // sse状态
  const readyState = ref({ key: 0, value: "正在链接中" });

  const creatSource = () => {
    const stateArr = [
      { key: 0, value: "正在链接中" },
      { key: 1, value: "已经链接并且可以通讯" },
      { key: 2, value: "连接已关闭或者没有链接成功" },
    ];

    try {
      source.value= new EventSource(url);
      source.value.onopen = (e) => {
        readyState.value = stateArr[source.value?.readyState ?? 0];
      };

      source.value.onerror = (e) => {
        readyState.value = stateArr[source.value?.readyState ?? 0];
      };
      source.value.onmessage = (e) => {
        e.data && (sseData.value = { ...JSON.parse(e.data) });
      };
    } catch (error) {
      console.log(error);
    }
  };

  const sourceInit = () => {
    if (!source.value|| source.value.readyState === 2) {
      creatSource();
    }
  };

  //  关闭 WebSocket
  const closeSource = () => {
    source.value?.close();
  };

  //重连
  const reconnectSSE = () => {
    try {
      closeSource();
      source.value= null;
      creatSource();
    } catch (e) {
      console.log(e);
    }
  };

  return {
    sseData,
    readyState,
    sourceInit,
    closeSource,
    reconnectSSE,
  };
};
export default useSSE;