Javascript 如何实现快速ws-route
更新: 我需要正确设置express ws:Javascript 如何实现快速ws-route,javascript,node.js,express,websocket,Javascript,Node.js,Express,Websocket,更新: 我需要正确设置express ws: const express = require('express'); let expressWs = require('express-ws'); expressWs = expressWs(express()); const app = expressWs.app; const router = express.Router(); const createError = require('http-errors'); const path =
const express = require('express');
let expressWs = require('express-ws');
expressWs = expressWs(express());
const app = expressWs.app;
const router = express.Router();
const createError = require('http-errors');
const path = require('path');
const cookieParser = require('cookie-parser');
const logger = require('morgan');
...
const playerHeadingRouter = require('./routes/playerHeading')(router, db);
连同我的路线模块:
module.exports = (router, db) => {
router.get('/api/player/:id', (req, res, next) => {
res.end();
});
router.ws('/api/player/:id', (ws, req) => {
ws.on('message', function(msg) {
const coords = JSON.parse(msg);
db.any(`UPDATE "user" SET x = ${coords.x} WHERE id = ${req.params.id}`)
db.any(`UPDATE "user" SET y = ${coords.y} WHERE id = ${req.params.id}`)
db.any(`UPDATE "user" SET geom = ST_SetSRID(ST_MakePoint(x, y),27700) WHERE id = ${req.params.id}`)
.then(() => {
// success;
console.log('msg', msg);
})
.catch(error => {
// error;
console.log('error', error);
});
});
// socket
});
}
现在,当我使用chrome websockets客户端时,我可以建立到以下位置的连接:
ws://localhost:3001/api/player-heading/2
并从我的express服务器发送一条用于DB查询的消息。如果您托管的是websocket端点,您将无法通过HTTP访问它。您需要使用websocket客户端连接到ws://端点。您可以使用Chrome扩展插件来执行此操作。谢谢。尝试打开ws://localhost:3001/echo会给我一个“未定义”的提示。您的第二个代码段设置为echo客户端发送的任何内容。如果您从客户端发送消息,消息是否返回?请查看更新。我现在可以建立连接,并且可以通过您提到的浏览器插件将数据发送到express服务器。再次感谢。