websocket-socketTask.uvue

<template>
  <view>
    <page-head title="websocket通讯示例"></page-head>
    <view class="uni-padding-wrap">
      <view class="uni-btn-v">
        <text class="websocket-msg">{{ showMsg }}</text>
        <button class="uni-btn-v" type="primary" @click="connect">
          连接websocket服务
        </button>
        <button
          class="uni-btn-v"
          v-show="connected"
          type="primary"
          @click="send"
        >
          发送一条消息
        </button>
        <button class="uni-btn-v" type="primary" @click="close">
          断开websocket服务
        </button>
        <text class="websocket-tips"
          >发送消息后会收到一条服务器返回的消息（与发送的消息内容一致）</text
        >
      </view>
    </view>
  </view>
</template>

<script lang="uts">
export default {
  data() {
    return {
      connected: false,
      connecting: false,
      socketTask: null as SocketTask | null,
      msg: '',
      platform: '',
      pageVisible: false,
    }
  },
  computed: {
    showMsg(): string {
      if (this.connected) {
        if (this.msg.length > 0) {
          return '收到消息：' + this.msg
        } else {
          return '等待接收消息'
        }
      } else {
        return '尚未连接'
      }
    },
  },
  onLoad() {
    this.platform = uni.getSystemInfoSync().platform
    this.pageVisible = true
  },
  onUnload() {
    this.pageVisible = false
    uni.hideLoading()
    let task = this.socketTask
    if (task != null) {
      task.close({
        code: 1000,
        reason: 'close reason from client',
        success(res: any) {
          console.log('uni.closeSocket success', res)
        },
        fail(err: any) {
          console.log('uni.closeSocket fail', err)
        },
      } as CloseSocketOptions)
    }
  },
  methods: {
    connect() {
      if (this.connected || this.connecting) {
        uni.showModal({
          content: '正在连接或者已经连接，请勿重复连接',
          showCancel: false,
        })
        return
      }
      this.connecting = true
      uni.showLoading({
        title: '连接中...',
      })
      this.socketTask = uni.connectSocket({
        url: 'ws://websocket.dcloud.net.cn',
        success(res: any) {
          // 这里是接口调用成功的回调，不是连接成功的回调，请注意
          console.log('uni.connectSocket success', res)
        },
        fail(err: any) {
          // 这里是接口调用失败的回调，不是连接失败的回调，请注意
          console.log('uni.connectSocket fail', err)
        },
      })
      this.socketTask?.onOpen((res: any) => {
        if (this.pageVisible) {
          this.connecting = false
          this.connected = true
          uni.hideLoading()
          uni.showToast({
            icon: 'none',
            title: '连接成功',
          })
          console.log('onOpen', res)
        }
      })
      this.socketTask?.onError((err: any) => {
        if (this.pageVisible) {
          this.connecting = false
          this.connected = false
          uni.hideLoading()
          uni.showModal({
            content: '连接失败，可能是websocket服务不可用，请稍后再试',
            showCancel: false,
          })
          console.log('onError', err)
        }
      })
      this.socketTask?.onMessage((res: OnSocketMessageCallbackResult) => {
        if (this.pageVisible) {
          this.msg = res.data as string
          console.log('onMessage', res)
        }
      })
      this.socketTask?.onClose((res: any) => {
        if (this.pageVisible) {
          this.connected = false
          this.socketTask = null
          this.msg = ''
          console.log('onClose', res)
        }
      })
    },
    send() {
      const data =
        'from ' +
        platform +
        ' : ' +
        parseInt(Math.random() * 10000 + '').toString()
      this.socketTask?.send({
        data,
        success(res: any) {
          console.log(res)
        },
        fail(err: any) {
          console.log(err)
        },
      } as SendSocketMessageOptions)
    },
    close() {
      this.socketTask?.close({
        code: 1000,
        reason: 'close reason from client',
        success(res: any) {
          console.log('uni.closeSocket success', res)
        },
        fail(err: any) {
          console.log('uni.closeSocket fail', err)
        },
      } as CloseSocketOptions)
    },
  },
}
</script>

<style>
.uni-btn-v {
  padding: 10rpx 0;
}

.uni-btn-v {
  margin: 20rpx 0;
}

.websocket-msg {
  padding: 40px 0px;
  text-align: center;
  font-size: 14px;
  line-height: 40px;
  color: #666666;
}

.websocket-tips {
  padding: 40px 0px;
  text-align: center;
  font-size: 14px;
  line-height: 24px;
  color: #666666;
}
</style>