364 lines
14 KiB
JavaScript
364 lines
14 KiB
JavaScript
const net = require('net');
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const CryptoJS = require("crypto-js");
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const KEY = CryptoJS.enc.Utf8.parse('BDQH');
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class SimpleNtripCaster {
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constructor(app) {
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this.app = app;
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const { config, redis } = app;
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const port = config.caster.port;
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this.port = port;
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this.redis = redis;
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this.sourcetable = [];
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this.serverSockets = new Map(); // mountpoint -> server socket
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this.sizeSockets = new Map(); // client socket -> mountpoint
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this.clientSockets = new Map(); // client socket -> mountpoint
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this.mountData = new Map(); // mountpoint -> 当前连接的 server socket
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console.log(`[Caster] 启动在端口 ${port}`);
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}
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start() {
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this.server = net.createServer((socket) => {
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let clientInfo = '';
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socket.on('data', (data) => {
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const request = data.toString();
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clientInfo += request;
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// 检查是否收到完整的HTTP请求（以空行结束）
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if (clientInfo.includes('\r\n\r\n')) {
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this.handleRequest(socket, clientInfo);
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clientInfo = '';
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}
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});
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socket.on('end', () => {
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console.log('[Caster] 连接关闭');
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this.removeClient(socket);
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this.broadSizeData();
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});
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socket.on('error', (err) => {
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console.log('[Caster] 连接错误:', err.message);
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this.removeClient(socket);
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this.broadSizeData();
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});
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});
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this.server.listen(this.port, () => {
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console.log(`[Caster] 等待连接...`);
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});
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}
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sendSourcetable(socket, statusCode, statusMessage, headers1 = {}, headers2 = {}, body = '') {
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let response = `HTTP/1.1 ${statusCode} ${statusMessage}\r\n`;
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for (const [key, value] of Object.entries(headers1)) {
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response += `${key}: ${value}\r\n`;
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}
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response += `\r\n`;
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response += `SOURCETABLE ${statusCode} ${statusMessage}\r\n`;
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for (const [key, value] of Object.entries(headers2)) {
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response += `${key}: ${value}\r\n`;
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}
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response += '\r\n' + body;
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socket.end(response);
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}
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sendResponse(socket, statusCode, statusMessage, headers = {}, body = '') {
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let response = `HTTP/1.1 ${statusCode} ${statusMessage}\r\n`;
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for (const [key, value] of Object.entries(headers)) {
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response += `${key}: ${value}\r\n`;
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}
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response += '\r\n' + body;
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socket.end(response);
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}
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clientSendResponse(socket, statusCode, statusMessage, headers = {}, body = '') {
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let response = `HTTP/1.1 ${statusCode} ${statusMessage}\r\n`;
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for (const [key, value] of Object.entries(headers)) {
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response += `${key}: ${value}\r\n`;
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}
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response += '\r\n' + body;
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socket.write(response);
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}
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handleOptions(socket, headers) {
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this.sendResponse(socket, 204, 'No Content', {
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'Access-Control-Allow-Origin': headers.origin,
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'Access-Control-Allow-Methods': 'GET, OPTIONS, SIZE, SOURCE',
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'Access-Control-Allow-Headers': 'Content-Type, uid, Authorization, ntrip-version, Client-Type, Request-Type',
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});
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}
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parseHeaders(headerLines) {
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const headers = {};
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headerLines.forEach((line) => {
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const [key, value] = line.split(': ');
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headers[key.toLowerCase()] = value;
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});
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return headers;
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}
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handleRequest(socket, request) {
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const lines = request.split('\r\n');
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const firstLine = lines[0];
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console.log(`[Caster] 收到请求: ${firstLine.substring(0, 50)}...`);
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// 处理 OPTIONS 请求
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if (firstLine.split(' ')[0] === 'OPTIONS') {
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const headers = this.parseHeaders(lines.slice(1, lines.indexOf('')));
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this.handleOptions(socket, headers);
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} else if (firstLine === 'GET / HTTP/1.1' || firstLine === 'GET / HTTP/1.0' || firstLine === 'GET /') {
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// 客户端请求源列表
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this.handleSourcetable(socket, lines);
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} else if (firstLine.startsWith('SOURCE')) {
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// Server 挂载请求
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this.handleServerMount(socket, lines);
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} else if (firstLine.startsWith('GET /')) {
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// 客户端请求数据流
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this.handleClientRequest(socket, lines);
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} else {
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this.sendResponse(socket, 400, 'Bad Request', {
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'Access-Control-Allow-Origin': '*'
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});
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}
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}
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// 发送源列表
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handleSourcetable(socket, lines) {
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const headers = this.parseHeaders(lines.slice(1, lines.indexOf('')));
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let table = '';
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this.sourcetable.forEach(element => {
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const { mountpoint, MountpointOptions } = element;
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// 源ID
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const SourceID = MountpointOptions[0] || 'STR: ';
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// 格式
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const Format = MountpointOptions[1] || 'RTCM';
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// 格式详情
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const FormatDetails = MountpointOptions[2] || '';
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// 载体
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const Carrier = MountpointOptions[3] || '';
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// 导航系统
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const NavSystem = MountpointOptions[4] || '';
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// 网络
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const NetWork = MountpointOptions[5] || '';
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// 国家
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const Country = MountpointOptions[6] || '';
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// 纬度
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const Latitude = MountpointOptions[7] || 0.0;
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// 经度
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const Longitude = MountpointOptions[8] || 0.0;
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// NMEA
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const NMEA = MountpointOptions[9] || '';
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// 解决方案
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const Soution = MountpointOptions[10] || '';
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// 发生器
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const Generator = MountpointOptions[11] || '';
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// 压缩加密
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const ComprEncryp = MountpointOptions[12] || '';
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// 认证
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const Auth = MountpointOptions[13] || '';
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// 费用
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const Fee = MountpointOptions[14] || '';
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// 比特率
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const Bitrate = MountpointOptions[15] || '';
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const found = lines.find(line => line.startsWith('Ntrip-Version: Ntrip/2.0'));
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if (found == 'Ntrip-Version: Ntrip/2.0') {
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// 变体B：RTCM/ntrip-2风格
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table += `STR;${Format};${mountpoint};${FormatDetails};;${Carrier};${NavSystem};${NetWork};${Country};${Latitude};${Longitude};${NMEA};${SourceID};;;;\r\n`;
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} else {
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// 变体A：BKG/NTRIP 1.0风格
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table += `STR;${Format};${mountpoint};${FormatDetails};;${Carrier};${NavSystem};${SourceID};${Latitude};${Longitude};0.0;${NetWork};${Country};;;;\r\n`;
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}
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});
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table += 'ENDSOURCETABLE\r\n';
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this.sendSourcetable(socket, 200, 'OK', {
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'Access-Control-Allow-Origin': headers.origin ? headers.origin : '*',
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'Server': 'NTRIP Caster',
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'Content-Type': 'text/plain',
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'Date': 'Tue, 12 May 2026 08:00:00 GMT',
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'Connection': 'close'
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}, {
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'Access-Control-Allow-Origin': headers.origin ? headers.origin : '*',
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'Server': 'Caster/1.0',
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'Content-Type': 'text/plain',
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'Charset': 'UTF-8'
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}, table);
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console.log('[Caster] 已发送源列表');
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}
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// 处理 Server 挂载
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async handleServerMount(socket, lines) {
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const source = lines[0].split(' ');
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// 密码
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const password = source[1];
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// 挂载点
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const mountpoint = source[2];
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const findMountpoint = await this.app.curl('http://127.0.0.1:' + this.app.server.address().port + '/findMountpoint', {
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dataType: 'json',
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contentType: 'application/x-www-form-urlencoded',
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method: 'POST',
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timeout: 3000,
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data: {
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mountpoint: mountpoint
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}
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});
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if (findMountpoint.data.code == 404) {
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this.sendResponse(socket, 404, 'Mountpoint Not Found', {});
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return;
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}
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if (password !== findMountpoint.data.password) {
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this.sendResponse(socket, 401, 'Unauthorized', {});
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return;
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}
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const MountpointOptions = lines[2].split(';');
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this.sourcetable.push({ password, mountpoint, MountpointOptions });
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this.serverSockets.set(mountpoint, socket);
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this.mountData.set(mountpoint, {
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socket: socket,
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lastUpdate: Date.now()
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});
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// 响应 Server
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socket.write('ICY 200 OK\r\n\r\n');
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console.log(`[Caster] Server 挂载成功: ${mountpoint}`);
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// 监听 Server 数据
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socket.on('data', (data) => {
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this.broadcastData(mountpoint, data);
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});
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socket.on('end', () => {
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console.log(`[Caster] Server 断开: ${mountpoint}`);
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this.serverSockets.delete(mountpoint);
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this.mountData.delete(mountpoint);
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});
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}
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// 处理 Client 请求
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async handleClientRequest(socket, lines) {
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// 解析请求的挂载点
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const headers = this.parseHeaders(lines.slice(1, lines.indexOf('')));
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const firstLine = lines[0];
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const match = firstLine.match(/GET \/(\w+) HTTP\/1\.[01]/);
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if (!match) {
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this.sendResponse(socket, 404, '404 Not Found', {
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'Access-Control-Allow-Origin': headers.origin,
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});
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return;
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}
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const mountpoint = match[1];
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console.log(`[Caster] Client 请求挂载点: ${mountpoint}`);
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const find = lines.find(line => line.startsWith('Request-Type: SIZE'));
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const found = lines.find(line => line.startsWith('Client-Type: Virtual-NTRIP-Client/1.0'));
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if (found !== 'Client-Type: Virtual-NTRIP-Client/1.0') {
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if (find !== 'Request-Type: SIZE') {
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const findMountpoint = await this.app.curl('http://127.0.0.1:' + this.app.server.address().port + '/findMountpoint', {
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dataType: 'json',
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contentType: 'application/x-www-form-urlencoded',
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method: 'POST',
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timeout: 3000,
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data: {
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mountpoint: mountpoint
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}
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});
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if (findMountpoint.data.code == 404) {
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this.sendResponse(socket, 404, 'Mountpoint Not Found', {});
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return;
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}
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const getPassword = await this.app.curl('http://127.0.0.1:' + this.app.server.address().port + '/getPassword', {
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dataType: 'json',
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contentType: 'application/x-www-form-urlencoded',
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method: 'POST',
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timeout: 3000,
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data: {
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mountpoint: mountpoint,
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base: headers.authorization.split(' ')[1],
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status: findMountpoint.data.status
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}
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});
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if (getPassword.data.code == 404) {
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this.sendResponse(socket, 401, 'Unauthorized', {});
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return;
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}
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}
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}
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if (find !== 'Request-Type: SIZE') {
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if (!this.mountData.has(mountpoint)) {
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this.sendResponse(socket, 404, 'Mountpoint Not Found', {
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'Access-Control-Allow-Origin': headers.origin
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});
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return;
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}
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}
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if (found == 'Client-Type: Virtual-NTRIP-Client/1.0') {
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const uid = lines[7].split(': ')[1];
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const token = lines[6].split(': ')[1];
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let decryptUid = CryptoJS.AES.decrypt(uid, KEY, {
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mode: CryptoJS.mode.ECB,
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padding: CryptoJS.pad.Pkcs7
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}).toString(CryptoJS.enc.Utf8).split('?')[0];
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const redisType = {
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"B": "db0",
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"C": "db1",
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"T": "db5",
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};
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const lastCode = decryptUid[decryptUid.length - 1];
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const rdmcode = await this.redis.get(redisType[lastCode]).get(token);
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if (!rdmcode) {
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this.sendResponse(socket, 401, 'Unauthorized', {
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'Access-Control-Allow-Origin': headers.origin
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});
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return;
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}
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}
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if (find == 'Request-Type: SIZE') {
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const uid = lines[8].split(': ')[1];
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// 接受客户端连接
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this.sizeSockets.set(uid + ':' + mountpoint, socket);
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const size = [...this.clientSockets.values()].filter(value => value == mountpoint);
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this.clientSendResponse(socket, 200, 'OK', {
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'Access-Control-Allow-Origin': headers.origin, // 设置允许的源
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'Content-Type': 'text/event-stream',
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'Connection': 'keep-alive'
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}, size.length);
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console.log(`[Caster] 已发送Client挂载数量`);
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} else {
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// 接受客户端连接
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this.clientSockets.set(socket, mountpoint);
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this.clientSendResponse(socket, 200, 'OK', {
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'Access-Control-Allow-Origin': headers.origin, // 设置允许的源
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'Content-Type': 'text/event-stream',
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'Connection': 'keep-alive'
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});
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this.broadSizeData();
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console.log(`[Caster] Client 已连接至: ${mountpoint}`);
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}
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}
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// 广播已连接到此挂载点的客户端数量数据给所有已连接到此挂载点的客户端
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broadSizeData() {
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for (const [clientMsg, client] of this.sizeSockets.entries()) {
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const mountpoint = clientMsg.split(':')[1];
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const size = [...this.clientSockets.values()].filter(value => value == mountpoint);
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client.write(size.length + '');
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}
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}
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// 广播数据给所有连接到此挂载点的客户端
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broadcastData(mountpoint, data) {
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for (const [client, clientMount] of this.clientSockets.entries()) {
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if (clientMount === mountpoint && !client.destroyed) {
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client.write(data);
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}
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}
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}
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removeClient(socket) {
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this.clientSockets.delete(socket);
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}
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findHeader(lines, headerName) {
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for (const line of lines) {
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if (line.startsWith(headerName + ':')) {
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return line.substring(headerName.length + 1).trim();
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}
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}
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return null;
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}
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}
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// 导出类供单独使用
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module.exports = { SimpleNtripCaster }; |