最近看人家用socket.io聊天,于是自己也想打个服务试试,不试不知道,一试吓一跳,原来这里吗还有这么多坑,下面就是所遇的坑,记录一哈,但愿可以帮助到遇到同样的坑的小伙伴
这里我使用nodejs 作为我的后台服务
D:\learnVUE>mkdir socketIOTest
D:\learnVUE>cd socketIOTest
D:\learnVUE\socketIOTest>mkdir nodejsProj
D:\learnVUE\socketIOTest>cd nodejsProj
D:\learnVUE\socketIOTest\nodejsProj>npm init -y
D:\learnVUE\socketIOTest\nodejsProj>npm i express -S
D:\learnVUE\socketIOTest\nodejsProj>npm i cors -S
D:\learnVUE\socketIOTest\nodejsProj>npm i socket.io -S
在app.js中增加如下类容
/*
* @Descripttion:
* @version:
* @Author: dex
* @Date: 2021-01-21 18:01
* @LastEditors: dex
* @LastEditTime: 2021-01-21 18:01
*
*/
const app = require("express")();
var http = require("http").createServer(app);
var socket = require("socket.io")(http, {
transports: ["websocket"],
});
app.get("/", function (req, res) {
res.send("你好web秀
");
});
//设置跨域访问
app.all("*", function (req, res, next) {
res.header("Access-Control-Allow-Origin", "*");
res.header("Access-Control-Allow-Headers", "X-Requested-With");
res.header("Access-Control-Allow-Methods", "PUT,POST,GET,DELETE,OPTIONS");
res.header("X-Powered-By", " 3.2.1");
res.header("Content-Type", "application/json;charset=utf-8");
next();
});
// socket.on("connect", function (socket) {
// console.log("conneted ...", socket);
// });
// 监听客户端连接
socket.on("connection", function (socket) {
console.log("客户端有连接");
socket.on("connect", () => {
console.log("客户端开始连接");
});
// 监听客户端断开
socket.on("disconnect", () => {
console.log("客户端断开");
});
// 给客户端发送消息
socket.emit("welcome", "欢迎连接socket");
// 监听客户端消息
socket.on("hello", (data) => {
console.log("接收客户端发送数据", data);
});
});
// 启动服务器 监听 8088 端口
http.listen(3000, function () {
console.log("server runing at 127.0.0.1:3000");
});
D:\learnVUE\socketIOTest\nodejsProj>node app.js
server runing at 127.0.0.1:3000
D:\learnVUE\socketIOTest> vue init webpack vueTestSocketIo
D:\learnVUE\socketIOTest\vueTestSocketIo>npm i vue-socket.io -S
import Vue from "vue";
import App from "./App.vue";
import router from "./router";
import VueSocketIO from "vue-socket.io";
Vue.config.productionTip = false;
// 注册
Vue.use(
new VueSocketIO({
debug: true, // debug调试,生产建议关闭
connection: "http://localhost:3000"
})
);
new Vue({
// 这里为全局监听socket事件消息,监听函数这里只写了一点,其实很有很多事件。
sockets: {
connecting() {
console.log("正在连接");
},
disconnect() {
console.log("Socket 断开");
},
connect_failed() {
cosnole.log("连接失败");
},
connect() {
console.log("socket connected");
}
},
router,
render: h => h(App)
}).$mount("#app");
<template>
<div id="app55">
<div id="nav55">
<button @click="connect">建立连接</button>
<button @click="sendMessage">发送数据</button>
</div>
</div>
</template>
<script>
export default {
data() {
return {
};
},
methods: {
// 连接socket
connect() {
this.$socket.open(); // 开始连接socket
// 订阅事件
this.sockets.subscribe("welcome", data => {
console.log("welcome data==> ", data);
});
},
// 发送消息
sendMessage() {
this.$socket.emit("hello", "这里是客户端");
}
},
sockets: {
connect(data) {
console.log(data);
},
//
welcome: data => {
console.log("welcome data数据返回= >", data);
}
},
beforeDestroy() {
this.sockets.unsubscribe('welcome')
}
};
</script>
D:\learnVUE\socketIOTest\vueTestSocketIo>npm run dev
I Your application is running here: http://localhost:8080
想想是不是因为http的原因,那就试着将其部署到自己的https 服务器里面去,于是就开始着手下面的docker发布了
首选当然是把nodejs 项目搞到服务器,再配置一个Dockerfile这些都不多说了,可以看我另一篇docker发布vue
[root@dex nodejsProj]# ll
total 28
-rw-r--r-- 1 root root 707 Jan 22 06:20 app2.js
-rw-r--r-- 1 root root 1647 Jan 30 16:04 app.js
-rw-r--r-- 1 root root 581 Jan 22 10:00 Dockerfile
-rw-r--r-- 1 root root 1139 Jan 22 06:20 index.js
-rw-r--r-- 1 root root 452 Jan 22 09:57 package.json
drwxr-xr-x 2 root root 4096 Jan 22 06:20 public
drwxr-xr-x 2 root root 4096 Jan 22 06:20 views
其中Dockerfile类容也挺简单,就几行命令,看(这里要注意的是node镜像的版本不能太低))
FROM docker.io/node:12.19.0
# Create app directory
WORKDIR /usr/src/socketIoTestConnection
# Install app dependencies
# A wildcard is used to ensure both package.json AND package-lock.json are copied
# where available (npm@5+)
COPY package*.json ./
# configure npm source from taobao
#RUN npm install -g cnpm --registry=https://registry.npm.taobao.org
RUN npm config set package-lock false
RUN npm install
# If you are building your code for production
# RUN npm ci --only=production
# Bundle app source
COPY . .
EXPOSE 9019
CMD [ "npm", "start" ]
[root@dex nodejsProj]# docker build -t socketio_node_serve:v1 .
[root@dex ~]# docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
socketio_node_serve v1 53f997eed584 23 hours ago 930MB
[root@dex nodejsProj]# docker run -p 8431:3000 --name socketio_serve -d socketio_node_serve:v
[root@dex nginx]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
f474d019a61d socketio_node_serve:v1 "docker-entrypoint.s…" 23 hours ago Up 23 hours 9019/tcp, 0.0.0.0:8431->3000/tcp socketio_serve
好了容器服务跑起来了,接下来是配置一个nginx 把我的容器端口映射到外网上去,让客服端来访问
在nginx 中最开始的配置时是这样的
server {
listen 443 ssl;
location /socketioserve/ {
proxy_pass http://localhost:8431/;
}
}
然后在页面修改连接地址来进行访问
// 注册
Vue.use(
new VueSocketIO({
debug: true, // debug调试,生产建议关闭
connection: "https://benpaodehenji.com/socketioserve"
})
);
发现根本就无法访问,于是找了一些资料,将其修改为如下配置
location /socket.io/{
proxy_pass http://127.0.0.1:8431;
proxy_set_header Host $host;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_connect_timeout 60;
proxy_read_timeout 600;
proxy_send_timeout 600;
}
发现是可以访问了,只是跨域的问题依旧存在
Access to XMLHttpRequest at 'https://benpaodehenji.com/socket.io/?EIO=4&transport=polling&t=NSiqHnZ' from origin 'null' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.
failed: Error during WebSocket handshake: Unexpected response code: 502
使用cmd 进行如下测试
C:\Users\Lenovo>curl https://benpaodehenji.com/socket.io/?transport=polling
{
"code":0,"message":"Transport unknown"}
看这个结果发现是配置的问题,于是把app.js中
var socket = require("socket.io")(http, {
transports: ["websocket"],
});
修改为
var socket = require("socket.io")(http);
再度测试
C:\Users\Lenovo>curl https://benpaodehenji.com/socket.io/?transport=polling
0{
"sid":"IXY8bzxMcCmwXunTAAAN","upgrades":["websocket"],"pingInterval":25000,"pingTimeout":5000}
C:\Users\Lenovo>
发现配置已经和官方说的一样了,但是如下的跨域任然无法处理
在万般无奈下我单独创建了一个testConnectSocketio.html使用它来直接连接测试
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>testconnect</title>
</head>
<body>
<h6>test</h6>
<script src="https://cdnjs.cloudflare.com/ajax/libs/socket.io/3.1.0/socket.io.js"></script>
<script language="JavaScript">
let socket = io('https://benpaodehenji.com',{
transports: ["websocket"]
});
socket.emit('hello', {
msg:'hi, server'});
// socket.on()鐢ㄤ簬鎺ユ敹鏈嶅姟绔彂鏉ョ殑娑堟伅
socket.on('welcome', data=>{
console.log('client connect server',data);
});
socket.on('disconnect', ()=>{
console.log('client disconnect');
});
</script>
</body>
</html>
测试服务端响应:
2021-01-23T01:14:07.165041305Z > nodejsProj@1.0.0 start /usr/src/socketIoTestConnection
2021-01-23T01:14:07.165046213Z > node app.js
2021-01-23T01:14:07.165049447Z
2021-01-23T01:14:07.336723288Z server runing at 127.0.0.1:3000
2021-01-23T01:14:09.047098330Z 客户端有连接
2021-01-23T01:17:17.786180956Z 客户端断开
2021-01-23T01:24:49.561294438Z 客户端有连接
2021-01-23T01:24:49.624188505Z 接收客户端发送数据 {
msg: 'hi, server' }
看上面的测试充分证明了我的服务端配置时ok的,但问题又出在哪里呢?
再回去看一次官网的处理方案,
于是再次将app.js中的配置
var socket = require("socket.io")(http);
修改为:
var socket = require("socket.io")(http, {
cors: {
origin: "https://benpaodehenji.com",
methods: ["GET", "POST"]
}
});
改完后删除容器,删除镜像,再重复上面第四步中的2、3步流程从头再来,希望这次可以成功…
有回到官网,又发现了这一段:
于是赶紧配置
这次测试跨域提示已经没有了,但是测试又提示400错误
https://benpaodehenji.com/socket.io/?EIO=3&transport=polling&t=NTI4Tsg 400 (Bad Request)
于是到处收集资料,但是收获甚微…
A few days later…
再次回来测试项目,这次点击Network请求, 发现了如下错误
于是顺藤摸瓜,根据如上错误提示,最后在https://socket.io/docs/v3/migrating-from-2-x-to-3-0/index.html和
https://socket.io/blog/socket-io-3-1-0/发现了如下描述
说干就干,于是又在app.js增加 allowEIO3: true, 将配置修改如下
var socket = require("socket.io")(http, {
allowEIO3: true,
cors: {
origin: "http://localhost:8080",
methods: ["GET", "POST"],
credentials: true
}
});
哇 终于看见了希望
这里还有一个要注意cors
中的origin
不能配置为*
,否者还是会提示如下跨域
Access to XMLHttpRequest at 'https://benpaodehenji.com/socket.io/?EIO=3&transport=polling&t=NTIIi9A' from origin 'https://localhost:8082' has been blocked by CORS policy: The value of the 'Access-Control-Allow-Origin' header in the response must not be the wildcard '*' when the request's credentials mode is 'include'. The credentials mode of requests initiated by the XMLHttpRequest is controlled by the withCredentials attribute.
要配置为真实的客服端的IP如
cors: {
origin: "https://localhost:8080",
methods: ["GET", "POST"],
credentials: true
}
ok 看测试也可以接受客服端的数据了,这次踩坑经历基本结束。
最后最终修改好的app.js是这个样子的,谢谢阅读,希望可以为初次接触socketio的朋友提供一点帮助谢谢
/*
* @Descripttion:
* @version:
* @Author: dex
* @Date: 2021-01-21 18:01
* @LastEditors: dex
* @LastEditTime: 2021-01-30 18:45
*/
const app = require("express")();
var http = require("http").createServer(app);
var socket = require("socket.io")(http, {
allowEIO3: true,
cors: {
origin: ['http://localhost:8080', 'http://localhost:8082'],
methods: ["GET", "POST"],
credentials: true
}
});
app.get("/", function (req, res) {
res.send("你好web秀
");
});
//设置跨域访问
app.all("*", function (req, res, next) {
res.header("Access-Control-Allow-Origin", "*");
res.header("Access-Control-Allow-Headers", "X-Requested-With");
res.header("Access-Control-Allow-Methods", "PUT,POST,GET,DELETE,OPTIONS");
res.header("X-Powered-By", " 3.2.1");
res.header("Content-Type", "application/json;charset=utf-8");
next();
});
// socket.on("connect", function (socket) {
// console.log("conneted ...", socket);
// });
// 监听客户端连接
socket.on("connection", function (socket) {
console.log("客户端有连接");
socket.on("connect", () => {
console.log("客户端开始连接");
});
// 监听客户端断开
socket.on("disconnect", () => {
console.log("客户端断开");
});
// 给客户端发送消息
socket.emit("welcome", "欢迎连接socket");
// 监听客户端消息
socket.on("hello", (data) => {
console.log("接收客户端发送数据", data);
});
});
// 启动服务器 监听 8088 端口
http.listen(3000, function () {
console.log("server runing at 127.0.0.1:3000");
});