DigitalOcean 上的 NodeJS 服务器使用 socket.io 返回连接被拒绝

Question

我试图将 socket.io 引入到我用 Laravel 和 AngularJS 开发的应用程序中。
该应用程序在我的计算机上运行良好，但是当我尝试使其在服务器上运行时，我收到错误“ GET http://localhost:8080/socket.io/?EIO=3&transport=polling&t=LQxpNjO net::ERR_CONNECTION_REFUSED ” 。

服务器运行的是 Ubuntu 16.04，我使用 nginx 作为 Web 服务器。

这是创建 Nodejs 服务器的文件：

var app = require('express')();
var http = require('http').Server(app);
var io = require('socket.io')(http);
var Redis = require('ioredis');
var redis = new Redis();

var port = 8080;

http.listen(port, function() {
  console.log('Listening on *:' + port);
});

io.on('connection', function (socket) {

  console.info('Client connected');

  redis.subscribe('counter.increase');

  redis.on('message', function (channel, message) {
    console.log('Received message ' + message + ' in channel ' + channel);

    socket.emit(channel, message);
  });

  socket.on('disconnect', function() {
    console.info('Client disconnected');
  });

});

这是应该连接到 Nodejs 服务器的 AngularJS 工厂。这里我使用的是 Angular-socket-io：

angular.module('myServices').factory('socket', function (socketFactory) {
  var ioSocket = io.connect('http://localhost:8080');

  socket = socketFactory({
    ioSocket: ioSocket
  });

  return socket;
});

这是nginx的配置文件（/etc/nginx/sites-available/default）：

server {
    listen 80 default_server;
    listen [::]:80 default_server;

    root /var/www/html/public;
    index index.php index.html index.htm index.nginx-debian.html;

    server_name XXX.XXX.XXX.XXX;

    location / {
        try_files $uri $uri/ /index.php;
    }

    location ~ \.php$ {
        include snippets/fastcgi-php.conf;
        fastcgi_pass unix:/run/php/php7.0-fpm.sock;
    }

    location ~ /\.ht {
        deny all;
    }
}

我该如何解决这个问题？


更新1

我像这样更新了 nginx 配置文件：

server {
    listen 80 default_server;
    listen [::]:80 default_server;

    root /var/www/html/public;

    index index.php index.html index.htm index.nginx-debian.html;
    server_name XXX.XXX.XXX.XXX;
    location / {
        try_files $uri $uri/ /index.php;
    }

    location ~ \.php$ {
        include snippets/fastcgi-php.conf;
        fastcgi_pass unix:/run/php/php7.0-fpm.sock;
    }

    location ~* \.io {
        proxy_pass http://localhost:8080;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection 'upgrade';
        proxy_set_header Host $host;
        proxy_cache_bypass $http_upgrade;
    }

    location ~ /\.ht {
        deny all;
    }
}

upstream app_yourdomain {
    server 127.0.0.1:3000;
    keepalive 8;
}

AngularJS 工厂是这样的：

angular.module('myServices').factory('socket', function (socketFactory) {
  var ioSocket = io.connect('http://localhost:8080/socket.io');

  socket = socketFactory({
    ioSocket: ioSocket
  });

  return socket;
});

现在我收到以下错误：
- GET http://example.com/bower_components/socket.io-client/socket.io.js


更新 2

这些是我的 nginx 配置文件：

upstream app_example.com {
    server 127.0.0.1:3000;
    keepalive 8;
}

server {
    listen 80 default_server;
    listen [::]:80 default_server;

    root /var/www/html/public;

    index index.php index.html index.htm index.nginx-debian.html;

    server_name XXX.XXX.XXX.XXX;

    location / {
        # First attempt to serve request as file, then as
        # directory, then fall back to displaying a 404.
        try_files $uri $uri/ /index.php;
    }

    location ~ \.php$ {
        include snippets/fastcgi-php.conf;
        fastcgi_pass unix:/run/php/php7.0-fpm.sock;
    }

    location ~ ^/(socket\.io) {
        proxy_pass http://localhost:8080;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection 'upgrade';
        proxy_set_header Host $host;
        proxy_cache_bypass $http_upgrade;
    }

    location ~ /\.ht {
        deny all;
    }
}

和 AngularJS 工厂：

angular.module('myServices').factory('socket', function (socketFactory) {
  var ioSocket = io.connect('http://localhost');

  socket = socketFactory({
    ioSocket: ioSocket
  });

  return socket;
});

工作溶液

感谢约翰，我终于成功地使应用程序工作了。

这是nginx配置文件：

upstream app_example.com {
    server 127.0.0.1:3000;
    keepalive 8;
}

server {
    listen 80 default_server;
    listen [::]:80 default_server;

    root /var/www/html/public;

    index index.php index.html index.htm index.nginx-debian.html;

    server_name XXX.XXX.XXX.XXX;
    location / {
        try_files $uri $uri/ /index.php;
    }

    location ~ \.php$ {
        include snippets/fastcgi-php.conf;
        fastcgi_pass unix:/run/php/php7.0-fpm.sock;
    }

    location ~ ^/(socket\.io) {
        proxy_pass http://localhost:3000;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection 'upgrade';
        proxy_set_header Host $host;
        proxy_cache_bypass $http_upgrade;
    }

    location ~ /\.ht {
        deny all;
    }
}

这是 AngularJS 工厂：

angular.module('myServices').factory('socket', function (socketFactory) {
  var ioSocket = io.connect('http://example.com');

  socket = socketFactory({
    ioSocket: ioSocket
  });

  return socket;
});

这是nodejs服务器：

var app = require('express')();
var http = require('http').Server(app);
var io = require('socket.io')(http);
var Redis = require('ioredis');
var redis = new Redis();

var port = 3000;

http.listen(port, function() {
  console.log('Listening on *:' + port);
});

io.on('connection', function (socket) {

  console.info('Client connected');

  redis.subscribe('counter.increase');

  redis.on('message', function (channel, message) {
    console.log('Received message ' + message + ' in channel ' + channel);

    socket.emit(channel, message);
  });

  socket.on('disconnect', function() {
    console.info('Client disconnected');
  });

});

Answer 1

Socket.io 在您的域名后使用 /socket.io。然后你必须指定 socket.io 位置：

location ~* \.io {
    proxy_pass http://localhost:8080;
    proxy_http_version 1.1;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection 'upgrade';
    proxy_set_header Host $host;
    proxy_cache_bypass $http_upgrade;        
}

并且不要忘记 Node js 应用程序的上游

upstream app_yourdomain {
    server 127.0.0.1:3000;
    keepalive 8;
}