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2016-08-09学习笔记

2016-08-09学习笔记

作者: 依惜在昨天 | 来源:发表于2016-08-10 09:37 被阅读0次

    nodejs静态资源服务器

    1. touch 一般是在创建一个空的日志文件的时候才会使用
    2. xshell 使用open命令来打开一个文件
    3. http是nodejs的服务模块
    4. url是url路由模块
    5. fs是文件服务器模块
    

    nodejs实例

    打开xshell 打开ubuntu 用xshell链接ubuntu

    1. nodejs服务器的创建:

    const http=require('http');
    const ip = '本机IP地址';
    const port = 3000;
    http.createServer((req,res)=>{
        res.writeHead(200,{'Content-type':'text/html'});
        res.write('hello');
        res.end();
    }).listen(port,ip,()=>{
          console.log('server start');
    });
    
    //主机IP
    const ip = '192.168.0.110';
    //端口号
    const port = 3000;
    //引入的组建模块  http、url、fs
    const http = require('http');
    const url = require('url');
    const fs = require('fs');
    
    //创建一个服务
    var server = http.createServer(function(req,res){
        res.writeHead(200,{'Content-Type':'text/plain'});
         res.write('my nodejs');
        res.end();
    });
    //监听一个端口
    server.listen(port,ip,function(){
        console.log('server start');
    });
    
    //封装成函数调用实例
    const http=require('http');
    const ip = '本机IP地址';
    const port = 3000;
    var f = function(req,res){
      res.writeHead(200,{'Content-type':'text/html'});
      res.write('hello');
      res.end();
    }
    http.createServer(f).listen(port,ip,()=>{
      console.log('server start');
    });
    

    2. 抽象方法及获取URL部分块的内容 url

    const ip = '192.168.0.110';//主机IP
    const port = 3000;//端口号
    //引入的组建模块  http、url、fs
    const http = require('http');
    const url = require('url');
    const fs = require('fs');
    
    //创建服务的回掉函数
    var funSer = function(req,res){
        //获取url地址块的内容  如:/path/show
        var parth = url.parse(req.url).pathname;
    res.write(parth);
    res.end();
    }
    
    //监听端口的回掉
    var fun = function(){
    console.log('server start');
    }
    
    var server = http.createServer(funSer).listen(port,ip,fun);
    
    const http=require('http');
    const url = require('url');
    const ip = '本机IP地址';
    const port = 3000;
    var f = function(req,res){
      var pathname = url.parse(req.url).pathname;
      res.write(pathname);
      res.end();
    }
    var f2 = function(){
      console.log('server start');
    }
    http.createServer(f).listen(port,ip,f2);
    

    3. 读取文件的内容 File System

    const http=require('http');
    const fs = require('fs');
    const url = require('url');
    const ip = '本机IP地址';
    const port = 3000;
    
    var pathname = url.parse(req.url).pathname;
    var userurl = url.parse(pathname);
    
    switch(userurl){
      case '' || '/':
          fs.readFile('./index.html',func(err,content){
            if(err){
              console.log(err);
            }
            else{
              res.writeHead(200,{'Content-type':'text/html'});
            }
          });
    }
    
    const ip = '192.168.0.110';//主机IP
    const port = 3000;//端口号
    //引入的组建模块  http、url、fs
    const http = require('http');
    const url = require('url');
    const fs = require('fs');
    
    //真正打印文件内容
    fs.readFile('./index.html', (err, data) => {
        if (err) throw err;
        //打印字符串内容
        console.log(data.toString());
    });
    
    //创建服务的回掉函数
    var funSer = function(req,res){
        //获取url地址块的内容  如:/path/show
        var parth = url.parse(req.url).pathname;
        res.write(parth);
        res.end();
    }
    
    //监听端口的回掉
    var fun = function(){
        console.log('server start');
    }
    var server = http.createServer(funSer).listen(port,ip,fun);
    

    4. 读取文件的内容并在浏览器中输出 File System

    const ip = '192.168.0.110';//主机IP
    const port = 3000;//端口号
    //引入的组建模块  http、url、fs
    const http = require('http');
    const url = require('url');
    const fs = require('fs');
    
    //读取文件内容
    var data = fs.readFileSync('./index.html');
    //创建服务的回掉函数
    var funSer = function(req , res){
    //获取url地址块的内容  如:/path/show
    var path = urls.parse( req.url ).pathname;
    res.write( data.toString() );
    res.write( path );
    res.end();
    }
    
    //监听端口的回掉
    var fun = function(){
    console.log('server start');
    }
    var server = http.createServer(funSer).listen(port,ip,fun);
    

    5. 完整实例(根据不同的url地址请求不同的文件【模板】)

    const ip = '192.168.0.110';//主机IP
    
    const port = 3000;//端口号
    
    //引入的组建模块  http、url、fs
    const http = require('http');
    const url = require('url');
    const fs = require('fs');
    
    //实例化一个服务容器
    var server = new http.Server();
    
    //监听一个端口
    server.listen(port , ip);
    
    //注册一个事件处理的on方法
    server.on('request' , function(request , response){
      
    //解析请求的url
    var url = urlapi.parse(request.url);
    
    //监听请求的网站,以当前脚本目录为根目录的url地址
    console.log(url.pathname);
    
    //特殊URL会让服务器在发送响应前先等待
    //根据path路径来读取不同的模板文件
    switch( url.pathname ){ //判断请求的路径信息
        case '' || '/': //处理请求网站根目录,指定加载对应的文件夹,一般以根目录的index.html为默认,nodejs是高效流处理的方案,也可以通过配置文件来设置
        
            //读取文件内容(打开请求的文件)
            fs.readFile('./index.html',function( error, content){
                if(error){//如果有错误时,显示错误信息
                    res.writeHead(400,{'Content-Type':'text/plain;charset="utf-8"'});
                    res.write(error.message);
                    res.end();
                }else{
                    //正确时浏览器输出模板文件的内容
                    res.writeHead(200,{'Content-Type':'text/html;charset="utf-8"'});//告诉相应的请求头信息,返回数据
                    res.write(content);//模板文件内容
                    res.end();
                }
            });
            break;
        case '/list':
            fs.readFile('./list.html',function( error, content){
                if(error){
                    res.writeHead(400,{'Content-Type':'text/plain;charset="utf-8"'});
                    res.write(error.message);
                    res.end();
                }else{
                    res.writeHead(200,{'Content-Type':'text/html;charset="utf-8"'});
                    res.write(content);
                    res.end();
                }
            });
            break;
        case '/show':
            fs.readFile('./show.html',function( error, content){
                if(error){
                    res.writeHead(400,{'Content-Type':'text/plain;charset="utf-8"'});
                    res.write(error.message);
                    res.end();
                }else{
                    res.writeHead(200,{'Content-Type':'text/html;charset="utf-8"'});
                    res.write(content);
                    res.end();
                }
            });
            break;
        default:
            fs.readFile('./default.html',function( error, content){
                if(error){
                    res.writeHead(400,{'Content-Type':'text/plain;charset="utf-8"'});
                    res.write(error.message);
                    res.end();
                }else{
                    res.writeHead(200,{'Content-Type':'text/html;charset="utf-8"'});
                    res.write(content);
                    res.end();
                }
            });
            break;
    
        }
    
    });
    

    练习:http 文件(每次都需要重启服务器)

    const http=require('http');
    const ip = '本机IP地址';
    const port = 3000;
    http.createServer((req,res)=>{
        res.writeHead(200,{'Content-type':'text/html'});
        res.write('hello');
        res.end();
    }).listen(port,ip,()=>{
          console.log('server start');
    });
    
    const http=require('http');
    const ip = '本机IP地址';
    const port = 3000;
    var f = function(req,res){
      res.writeHead(200,{'Content-type':'text/html'});
      res.write('hello');
      res.end();
    }
    http.createServer(f).listen(port,ip,()=>{
      console.log('server start');
    });
    
    const http=require('http');
    const ip = '本机IP地址';
    const port = 3000;
    var f = function(req,res){
      res.writeHead(200,{'Content-type':'text/html'});
      res.write('hello');
      res.end();
    }
    var f2 = function(){
      console.log('server start');
    }
    http.createServer(f).listen(port,ip,f2);
    
    const http=require('http');
    const url = require('url');
    const ip = '本机IP地址';
    const port = 3000;
    var f = function(req,res){
      var pathname = url.parse(req.url).pathname;
      res.write(pathname);
      res.end();
    }
    var f2 = function(){
      console.log('server start');
    }
    http.createServer(f).listen(port,ip,f2);
    
    const http=require('http');
    const fs = require('fs');
    const url = require('url');
    const ip = '本机IP地址';
    const port = 3000;
    <!-- rs.readFile('xiaoniu.txt',(err,data)=>{
      if(err) throw err;
      console.log(data.toString());
      }); -->
    var data = fs.readFileSync('xiaoniu.txt');
    var f = function(req,res){
      var pathname = url.parse(req.url).pathname;
      res.write(pathname);
      res.end();
    }
    var f2 = function(){
      console.log('server start');
    }
    http.createServer(f).listen(port,ip,f2);  
    
    const http=require('http');
    const fs = require('fs');
    const url = require('url');
    const ip = '本机IP地址';
    const port = 3000;
    
    var pathname = url.parse(req.url).pathname;
    var userurl = url.parse(pathname);
    
    switch(userurl){
      case '' || '/':
          fs.readFile('./index.html',func(err,content){
            if(err){
              console.log(err);
            }
            else{
              res.writeHead(200,{'Content-type':'text/html'});
            }
          });
    }
    

    参考资料:http://cnodejs.org/topic/4f16442ccae1f4aa27001071

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