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1.0.0（2025-03-17） 下载此版本

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使用说明

参考 工具类，java原生的逻辑和这个js逻辑一致 调用这个方法即可获得请求结果 var res =tcpRequest(jsonObj,ipaddr="");

import {TCP_IP,TCP_PROT,VIDEO_PROT,VIDEO_URL} from "@/utils/config.js"
// 定义 CCITT 表
const CCITT_TABLE = [
    0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50A5, 0x60C6, 0x70E7,
    0x8108, 0x9129, 0xA14A, 0xB16B, 0xC18C, 0xD1AD, 0xE1CE, 0xF1EF,
    0x1231, 0x0210, 0x3273, 0x2252, 0x52B5, 0x4294, 0x72F7, 0x62D6,
    0x9339, 0x8318, 0xB37B, 0xA35A, 0xD3BD, 0xC39C, 0xF3FF, 0xE3DE,
    0x2462, 0x3443, 0x0420, 0x1401, 0x64E6, 0x74C7, 0x44A4, 0x5485,
    0xA56A, 0xB54B, 0x8528, 0x9509, 0xE5EE, 0xF5CF, 0xC5AC, 0xD58D,
    0x3653, 0x2672, 0x1611, 0x0630, 0x76D7, 0x66F6, 0x5695, 0x46B4,
    0xB75B, 0xA77A, 0x9719, 0x8738, 0xF7DF, 0xE7FE, 0xD79D, 0xC7BC,
    0x48C4, 0x58E5, 0x6886, 0x78A7, 0x0840, 0x1861, 0x2802, 0x3823,
    0xC9CC, 0xD9ED, 0xE98E, 0xF9AF, 0x8948, 0x9969, 0xA90A, 0xB92B,
    0x5AF5, 0x4AD4, 0x7AB7, 0x6A96, 0x1A71, 0x0A50, 0x3A33, 0x2A12,
    0xDBFD, 0xCBDC, 0xFBBF, 0xEB9E, 0x9B79, 0x8B58, 0xBB3B, 0xAB1A,
    0x6CA6, 0x7C87, 0x4CE4, 0x5CC5, 0x2C22, 0x3C03, 0x0C60, 0x1C41,
    0xEDAE, 0xFD8F, 0xCDEC, 0xDDCD, 0xAD2A, 0xBD0B, 0x8D68, 0x9D49,
    0x7E97, 0x6EB6, 0x5ED5, 0x4EF4, 0x3E13, 0x2E32, 0x1E51, 0x0E70,
    0xFF9F, 0xEFBE, 0xDFDD, 0xCFFC, 0xBF1B, 0xAF3A, 0x9F59, 0x8F78,
    0x9188, 0x81A9, 0xB1CA, 0xA1EB, 0xD10C, 0xC12D, 0xF14E, 0xE16F,
    0x1080, 0x00A1, 0x30C2, 0x20E3, 0x5004, 0x4025, 0x7046, 0x6067,
    0x83B9, 0x9398, 0xA3FB, 0xB3DA, 0xC33D, 0xD31C, 0xE37F, 0xF35E,
    0x02B1, 0x1290, 0x22F3, 0x32D2, 0x4235, 0x5214, 0x6277, 0x7256,
    0xB5EA, 0xA5CB, 0x95A8, 0x8589, 0xF56E, 0xE54F, 0xD52C, 0xC50D,
    0x34E2, 0x24C3, 0x14A0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
    0xA7DB, 0xB7FA, 0x8799, 0x97B8, 0xE75F, 0xF77E, 0xC71D, 0xD73C,
    0x26D3, 0x36F2, 0x0691, 0x16B0, 0x6657, 0x7676, 0x4615, 0x5634,
    0xD94C, 0xC96D, 0xF90E, 0xE92F, 0x99C8, 0x89E9, 0xB98A, 0xA9AB,
    0x5844, 0x4865, 0x7806, 0x6827, 0x18C0, 0x08E1, 0x3882, 0x28A3,
    0xCB7D, 0xDB5C, 0xEB3F, 0xFB1E, 0x8BF9, 0x9BD8, 0xABBB, 0xBB9A,
    0x4A75, 0x5A54, 0x6A37, 0x7A16, 0x0AF1, 0x1AD0, 0x2AB3, 0x3A92,
    0xFD2E, 0xED0F, 0xDD6C, 0xCD4D, 0xBDAA, 0xAD8B, 0x9DE8, 0x8DC9,
    0x7C26, 0x6C07, 0x5C64, 0x4C45, 0x3CA2, 0x2C83, 0x1CE0, 0x0CC1,
    0xEF1F, 0xFF3E, 0xCF5D, 0xDF7C, 0xAF9B, 0xBFBA, 0x8FD9, 0x9FF8,
    0x6E17, 0x7E36, 0x4E55, 0x5E74, 0x2E93, 0x3EB2, 0x0ED1, 0x1EF0
];

// 计算 CRC CCITT
function crcCcitt(data, crc) {
    const length = data.length;
    for (let i = 0; i < length; i++) {
        const index = ((crc >> 8) ^ (data[i] & 0xff)) & 0xff;
        crc = (CCITT_TABLE[index] ^ (crc << 8)) & 0xffff;
    }
    return ~crc & 0xffff;
}

// 将字符串转换为字节数组
function stringToByteArray(str) {
    const bytes = [];
    const escapedStr = unescape(encodeURIComponent(str));
    for (let i = 0; i < escapedStr.length; i++) {
        bytes.push(escapedStr.charCodeAt(i));
    }
    return new Uint8Array(bytes);
}

// 从 JSON 构建数据包
function buildPacketFromJson(outstr, checksum) {
    const data = stringToByteArray(outstr);
    const dataSize = data.length;
    const packet = new Uint8Array(10 + dataSize);
    packet[0] = 0x7E;
    packet[1] = 0xE7;
    // 写入数据大小
    packet[2] = (dataSize >> 24) & 0xff;
    packet[3] = (dataSize >> 16) & 0xff;
    packet[4] = (dataSize >> 8) & 0xff;
    packet[5] = dataSize & 0xff;
    // 写入校验和
    packet[6] = (checksum >> 8) & 0xff;
    packet[7] = checksum & 0xff;
    const header = packet.slice(0, 8);
    const headerCrc = crcCcitt(header, 0);
    // 写入头部 CRC
    packet[8] = (headerCrc >> 8) & 0xff;
    packet[9] = headerCrc & 0xff;
    // 写入数据
    packet.set(data, 10);
    return packet;
}

// 缓冲区转换为 JSON
function bufferToJson(pBuffer, nStart, nOffset) {
    const jdata = [];

    for (let i = nStart; i < nOffset; i++) {
                // console.log(pBuffer[i] )
        if (pBuffer[i] === 0x7E) {
            if (i + 1 < nOffset && pBuffer[i + 1] === 0xE7) {
                if (nOffset > i + 8) {
                    const crc0 = crcCcitt(pBuffer.slice(i, i + 8), 0);
                    const crc1 = ((pBuffer[i + 8] & 0xff) << 8) | (pBuffer[i + 9] & 0xff);
                    if (crc0 === crc1) {
                        const nPacketSize = ((pBuffer[i + 2] & 0xff) << 24) | ((pBuffer[i + 3] & 0xff) << 16) |
                            ((pBuffer[i + 4] & 0xff) << 8) | (pBuffer[i + 5] & 0xff);
                        if (i + 10 + nPacketSize <= nOffset) {
                            const dataCrc = crcCcitt(pBuffer.slice(i + 10, i + 10 + nPacketSize), 0);
                            const packetCrc = ((pBuffer[i + 6] & 0xff) << 8) | (pBuffer[i + 7] & 0xff);

                            if (dataCrc === packetCrc) {
                                try {

                                    const jsonStr = decodeURIComponent(escape(String.fromCharCode.apply(null, pBuffer.slice(i + 10, i + 10 + nPacketSize))));
                                    // console.log(jsonStr)
                                    jdata.push(JSON.parse(jsonStr));
                                    nStart = i + 10 + nPacketSize;
                                    break;
                                } catch (e) {
                                    console.log("JSON decode error: " + e.message);
                                }
                            }
                        } else {
                            nStart = i;
                            break;
                        }
                    }
                } else {
                    nStart = i;
                    break;
                }
            } else {
                nStart = i;
                break;
            }
        }
    }
    return [nStart, nOffset,jdata];
}

// 从套接字获取 JSON 数据包
function getAJsonPacketFromSocket(nBytes, buffSize) {
    let pBuffer = new Uint8Array(0);
    let nOffset = 0;
    let nStart = 0;
    const MAX_BUFFER_SIZE = 65536;
    const jlist = [];

    while (true) {
        if (nOffset + buffSize > MAX_BUFFER_SIZE) {
            pBuffer = pBuffer.slice(nStart);
            nOffset = pBuffer.length;
            nStart = 0;
        }
        try {
            if (!nBytes || nBytes.length === 0) {
                break;
            }
            const newBuffer = new Uint8Array(pBuffer.length + nBytes.length);
            newBuffer.set(pBuffer, 0);
            newBuffer.set(nBytes, pBuffer.length);
            pBuffer = newBuffer;
            nOffset += nBytes.length;
        } catch (e) {
            console.log("Socket receive error: " + e.message);
            break;
        }
        const res = bufferToJson(pBuffer, nStart, nOffset);
        nStart = res[0];
        nOffset = res[1];
        if (res[2]) {
            jlist.push(res[2]);
        }
        if (jlist.length > 0) {
            return jlist;
        }
    }
    return jlist;
}

// TCP 客户端字节处理
async function tcpClientBytes(host, port, base64str, buffSize) {
    try {
        console.log([host, port, base64str, buffSize])
        const decodedBytes = Uint8Array.from(atob(base64str), c => c.charCodeAt(0));
        const socket = await uni.connectSocket({
            url: `ws://${host}:${port}`
        });
        await uni.sendSocketMessage({
            data: decodedBytes.buffer
        });
        return new Promise((resolve, reject) => {
            uni.onSocketMessage((res) => {
                const buffer = new Uint8Array(res.data);
                const bytesRead = buffer.length;
                resolve(buffer.slice(0, bytesRead));
            });
            uni.onSocketError((res) => {
                reject(new Error("Socket error: " + res.errMsg));
            });
        });
    } catch (e) {
        console.log("Socket error: " + e.message);
        return stringToByteArray("Socket error: " + e.message);
    }
}

// TCP 客户端字节处理返回 JSON 列表
async function tcpClientByte(host, port, base64str, buffSize) {
    try {
        const response = await tcpClientBytes(host, port, base64str, buffSize);
        return getAJsonPacketFromSocket(response, buffSize);
    } catch (e) {
        console.log("Socket error: " + e.message);
        return [];
    }
}

// TCP 客户端
async function tcpClient(ip, port) {
    const jsonstr = "{\"request\":\"QueryStatus\"}";
    const checksum = crcCcitt(stringToByteArray(jsonstr), 0);
    const byteArray = buildPacketFromJson(jsonstr, checksum);
    const base64String = btoa(String.fromCharCode.apply(null, byteArray));
    const result = await tcpClientByte(ip, port, base64String, 1024);
    console.log(base64String);
    return result;
}
function base64ToBytes(base64Str){
    return  Uint8Array.from(atob(base64Str), c => c.charCodeAt(0));
}
function encodeBase64String(base64Str){
    var nBytes= base64ToBytes(base64Str);
    var str= getAJsonPacketFromSocket(nBytes, 1024)
    // console.log(str)
    return str
}
function fmtData(jsonObj){
    // console.log(typeof jsonObj)
    if(typeof jsonObj =="object"){
        jsonstr =JSON.stringify(jsonObj)
    }else{
        jsonstr=jsonObj
    }

    var bytes =stringToByteArray(jsonstr)

    const checksum = crcCcitt(stringToByteArray(jsonstr), 0);

    const byteArray = buildPacketFromJson(jsonstr, checksum);

    const base64String = btoa(String.fromCharCode.apply(null, byteArray));
    return base64String
}
async function getData(ip ,port,jsonObj){
    return new Promise((resolve,reject)=>{
        const tcpclientbytes = uni.requireNativePlugin('tcpclientbytes');
        // console.log(jsonObj)
        var base64String=fmtData(jsonObj)
        // console.log(base64String)
        // 定义参数
        const params = {
            ip ,
            port,
            data:base64String
        };

        tcpclientbytes.TcpClientBytes(params, res => {
        //插件回调
            // console.log(res)
        var str=encodeBase64String(res)

        // console.log(str)
        try{
            resolve(str[0][0]||str[0]||str)
        }catch(e){
            console.log(e)
        }
            // console.log(str)
        })
    })

}
export function tcpRequest(jsonObj,ipaddr=""){
    var ip  =TCP_IP
    var port =TCP_PROT
    if(ipaddr != ""){
        var arr=ipaddr.split(":");
        ip= arr[0]
        if(arr[1]){
            port =arr[1]
        }
    }
    if(!port){
        port=80
    }
    return getData(ip,port,jsonObj)
}
// 导出函数供外部使用
export default {
    // 电梯项目调用这个即可
    tcpRequest,
    getData,
    fmtData,
    encodeBase64String,
    base64ToBytes,
    stringToByteArray,
    crcCcitt,
    buildPacketFromJson,
    bufferToJson,
    getAJsonPacketFromSocket,
    tcpClientBytes,
    tcpClientByte,
    tcpClient
};