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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<title>Title</title>
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<script>
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export default {
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data() {
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return {
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eventSource: null,
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stateData: null,
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list: [],
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connectStatus: false,
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};
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},
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created() {
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},
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methods: {
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startConnectHandler() {
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let url = "http://127.0.0.1:3000/sse/ai/question/push?title=请你介绍一下SSE？";
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// 表示与服务器建立连接的 URL。必填。
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const sseObj = new EventSource(url);
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this.eventSource = sseObj;
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console.log('状态', sseObj, this.eventSource)
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if (sseObj.readyState === 0) {
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this.connectStatus = true
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//sseObj.readyState === EventSource.CONNECTING 也可以判断正在连接服务器
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console.log('0:"正在连接服务器...');
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}
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sseObj.onopen = (e) => {
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if (sseObj.readyState === 1) {
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// sseObj.readyState === EventSource.OPEN 也可以判断连接成功
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let data = `SSE 连接成功，状态${sseObj.readyState}, 对象${e}`;
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this.stateData = data;
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console.log("1:SSE 连接成功");
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}
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};
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// 接收消息，这个事件需要和后端保持一致哈
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// 后端的事件名称：sseEvent
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sseObj.addEventListener("sseEvent", (event) => {
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const data = JSON.parse(event.data);
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//如果最后推送的是 'contDnd',说明推送已经完了。此时关闭连接
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if (data.content === 'contDnd') {
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this.endConnectHandler()
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} else {
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this.list.push(data.content);
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}
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console.log("这次消息推送的内容event:", data.content);
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});
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sseObj.onerror = (e) => {
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console.log("error", e);
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};
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},
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endConnectHandler() {
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if (this.eventSource) {
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this.connectStatus = false
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this.eventSource.close();
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if (this.eventSource.readyState === 2) {
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// sseObj.readyState === EventSource.CLOSED 也可以判断连接已经关闭
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console.log('2连接已经关闭。', this.eventSource, this.eventSource.readyState);
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}
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console.log("end");
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}
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},
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},
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};
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</script>
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<style scoped>
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.chat-box {
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padding-left: 20px;
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padding-top: 20px;
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}
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button {
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margin-right: 20px;
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padding: 6px;
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}
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</style>
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</head>
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<body>
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<template>
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<div class="chat-box">
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<button @click="startConnectHandler" :disabled="connectStatus">建立连接</button>
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<button @click="endConnectHandler">关闭连接</button>
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<h2>
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<p>连接状态{{ this.eventSource && this.eventSource.readyState }}</p>
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</h2>
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<h2>下面就是返回来的数据</h2>
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<div>
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<div v-for="(item, index) in list" :key="index">
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{{ item }}
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</div>
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</div>
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</div>
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</template>
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</body>
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</html>
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