123 lines
3.7 KiB
JavaScript
123 lines
3.7 KiB
JavaScript
// importScripts('../../web-modules/workerpool.min.js');
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const workerpool = require('../../web-modules/workerpool.min.js');
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const encoder = new TextEncoder();
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const decoder = new TextDecoder('utf-8');
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class SerialWorker {
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constructor(serial) {
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this.serial = serial;
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this.receiveBuffer = [];
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this.receiveStr = '';
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this.bufferLength = 0;
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const test = setInterval(() => {
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const message = generateRandomString(5);
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this.onData(encoder.encode(message));
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}, 1000);
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setTimeout(() => {
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clearInterval(test);
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}, 120 * 1000);
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}
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onOpen() {
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}
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onData(data) {
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/* UTF-8编码方式
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* ------------------------------------------------------------
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* |1字节 0xxxxxxx |
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* |2字节 110xxxxx 10xxxxxx |
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* |3字节 1110xxxx 10xxxxxx 10xxxxxx |
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* |4字节 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx |
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* |5字节 111110xx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx |
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* |6字节 1111110x 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx|
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* ------------------------------------------------------------
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*/
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for (let i in data) {
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if ((data[i] & 0x80) === 0x00) {
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// 1字节
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this.receiveBuffer = [];
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this.bufferLength = 0;
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this.receiveStr += String.fromCharCode(data[i]);
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} else if ((data[i] & 0xc0) === 0x80) {
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// 2字节以上的中间字节，10xxxxxx
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// 如果没有起始头，则丢弃这个字节
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if (!this.receiveBuffer.length) {
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return;
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}
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// 如果不是2字节及以上的起始头，则丢弃这个字节
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if (this.bufferLength < 2) {
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return;
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}
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this.receiveBuffer.push(data[i]);
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if (this.bufferLength === this.receiveBuffer.length) {
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this.receiveStr += decoder.decode(new Uint8Array(this.receiveBuffer));
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this.receiveBuffer = [];
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}
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} else {
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// 2字节以上的起始头
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if (this.receiveBuffer) {
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this.receiveBuffer = [];
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}
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this.bufferLength = this.#getBufferLength(data[i]);
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this.receiveBuffer.push(data[i]);
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}
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}
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}
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onError() {
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}
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onClose() {
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}
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#getBufferLength(data) {
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let len = 2;
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if ((data & 0xFC) === 0xFC) {
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len = 6;
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} else if ((data & 0xF8) === 0xF8) {
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len = 5;
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} else if ((data & 0xF0) === 0xF0) {
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len = 4;
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} else if ((data & 0xE0) === 0xE0) {
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len = 3;
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} else if ((data & 0xC0) === 0xC0) {
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len = 2;
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}
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return len;
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}
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}
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const createSerialWork = function(serial) {
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return new Promise((resolve, reject) => {
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console.log(serial)
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const serialWork = new SerialWorker(serial);
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const test = setInterval(() => {
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const data = serialWork.receiveStr;
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serialWork.receiveStr = '';
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workerpool.workerEmit({
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status: 'data',
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data: data
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});
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}, 5000);
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setTimeout(() => {
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workerpool.workerEmit({
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status: 'close'
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});
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resolve();
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}, 120 * 1000);
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});
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}
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function generateRandomString() {
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return '1234';
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}
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workerpool.worker({
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createSerialWork,
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generateRandomString
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}); |