详解本地Node.js服务器作为api服务器的解决办法

 //服务器端的代码
var express = require('express');

var app = express();

// set up handlebars view engine
var handlebars = require('express3-handlebars')
  .create({ defaultLayout:'main' });
app.engine('handlebars', handlebars.engine);
app.set('view engine', 'handlebars');

app.set('port', process.env.PORT || 3000);

app.use(express.static(__dirname + '/public'));

var fortuneCookies = [
  "Conquer your fears or they will conquer you.",
  "Rivers need springs.",
  "Do not fear what you don't know.",
  "You will have a pleasant surprise.",
  "Whenever possible, keep it simple.",
];

app.get('/', function(req, res) {
  res.render('home');
});
app.get('/about', function(req,res){
  var randomFortune = 
    fortuneCookies[Math.floor(Math.random() * fortuneCookies.length)];
  res.render('about', { fortune: randomFortune });
});

// 404 catch-all handler (middleware)
app.use(function(req, res, next){
  res.status(404);
  res.render('404');
});

// 500 error handler (middleware)
app.use(function(err, req, res, next){
  console.error(err.stack);
  res.status(500);
  res.render('500');
});

app.listen(app.get('port'), function(){
 console.log( 'Express started on http://localhost:' + 
  app.get('port') + '; press Ctrl-C to terminate.' );
});

//proxy.js
  var http = require('http'), 
     httpProxy = require('http-proxy'); //引入这个模块

// 新建一个代理 Proxy Server 对象 
var proxy = httpProxy.createProxyServer({}); 

// 捕获异常 
proxy.on('error', function (err, req, res) { 
 res.writeHead(500, { 
  'Content-Type': 'text/plain' 
 }); 
 res.end('Something went wrong. And we are reporting a custom error message.'); 
}); 

// 另外新建一个 HTTP 80 端口的服务器，也就是常规 Node 创建 HTTP 服务器的方法。 
// 在每次请求中，调用 proxy.web(req, res config) 方法进行请求分发 
var server = require('http').createServer(function(req, res) { 
 // 在这里可以自定义你的路由分发 
 var host = req.headers.host, ip = req.headers['x-forwarded-for'] || req.connection.remoteAddress; 
 console.log("client ip:" + ip + ", host:" + host); 

 switch(host){ //意思是监听下面的ip地址,如果匹配就转到
//127.0.0.1:3000地址
  case '192.168.0.101:8080':  //监听这个地址
  //这个地址在window上用ipconfig查看,mac/linux用ifconfig查看

  case 'bbs.aaaa.com': 
    proxy.web(req, res, { target: 'http://127.0.0.1:3000' }); //转到这个地址
  break; 

  default: 
    res.writeHead(200, { 
      'Content-Type': 'text/plain' 
    }); 
    res.end('Welcome to my server!'); 
 } 
}); 

console.log("listening on port 8080") 
server.listen(8080);

 //nginx.conf

 #原来的文件另存后。直接使用下面内容替换nginx.conf的内容


events {
  worker_connections 1024;
}
http {
  include    mime.types;
  default_type application/octet-stream;

  #log_format main '$remote_addr - $remote_user [$time_local] "$request" '
  #         '$status $body_bytes_sent "$http_referer" '
  #         '"$http_user_agent" "$http_x_forwarded_for"';



  sendfile    on;
  #tcp_nopush   on;

  #keepalive_timeout 0;
  keepalive_timeout 65;



  server {
    listen 8080; #监听80880端口
    server_name www.penguu.com 192.168.1.100; #这里是真机要访问的地址。
    # Mac 通过终端 ifconfig 查看。比如我查看的就是192.168.1.100
    #手机访问的接口就是 192.168.1.100:8080
    #实际在23行监听的端口可以是80端口，由于浏览器默认就是80端口。但是在mac中有权限问题。所#以就使用8080端口
    # address_book中的service中的地址也要修改路径是
    # view/service.js->host,修改为 192.168.1.100：8080

    #access_log /var/log/nginx/test.log;
    location / {
      proxy_set_header X-Real-IP $remote_addr;
      proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
      proxy_set_header Host $http_host;
      proxy_set_header X-Nginx-Proxy true;
      proxy_set_header Connection "";
      proxy_pass   http://127.0.0.1:3000; # address_book的 server地址，就是本地node.js服务器的ip地址
      #node.js默认就是127.0.0.1 ，port:3000是在app.js中设定的。可以修改。

    }

  }

  }