随身笔记

作者： admin

  • node text/html与text/plain有什么区别？

    node 图片 文件 类型

    MIME是服务器通知客户机传送文件是什么类型的主要方法，客户机浏览器也通过MIME告诉服务器它的参数。（服务器要向浏览器客服端传来数据时，要提前跟浏览器说要出传来什么样的数据类型）

    在网上，如果接收到的文件没有MIME头，就默认它为HTML格式。但这样也不好，因为当MIME的包头是text/plain时，浏览器将直接显示而不关心它的什么字体，颜色之类的参数

     

    response.setContentType() 的作用是使客户端浏览器，区分不同种类的数据，并根据不同的MIME调用浏览器内不同的程序嵌入模块来处理相应的数据

    case "doc": ContentType = "application/msword"; bre
case "doc":
 ContentType = "application/msword";
 break;
 case "pdf":
 ContentType = "application/pdf";
 break;
 case "jpg":
 case "jpeg":
 ContentType = "image/jpeg";
 break;
 case "gif":
 ContentType = "image/gif";
 break; 
 case "zip":
 ContentType = "application/zip";
 break;
 case "txt":
 ContentType = "text/plain";
 break;
 case "htm":
 case "html":
 ContentType = "text/html";
 break; 
 case "xls":
 ContentType = "application/vnd.ms-excel";
 break;
 case "ppt":
 ContentType = "application/vnd.ms-powerpoint";
 break;
 default:
 ContentType = "application/octet-stream";
 break;

     

     

     

     

  • node request模块

    http://segmentfault.com/a/1190000000385867

    https://github.com/request/request#requestoptions-callback

    https://www.npmjs.com/package/request

     

  • node querystring模块介绍

    querystring模块用于实现URL参数字符串与参数对象的互相转换，示例如下。

     

    querystring.parse('foo=bar&baz=qux&baz=quux&corge');
/* =>
{ foo: 'bar', baz: ['qux', 'quux'], corge: '' }
*/
 
querystring.stringify({ foo: 'bar', baz: ['qux', 'quux'], corge: '' });
/* =>
'foo=bar&baz=qux&baz=quux&corge='
*/

    querystring

     

     

  • node url模块介绍

     

    var url = require("url");  //要先加载url模块
var wo=url.parse('https://sdeno.com:8080/zp/js/23.php?123=456&789=999#hhh');
console.log(wo.protocol); // http:
console.log(wo.host); // www.xgllseo.com:8080
console.log(wo.port);// 8080
console.log(wo.hostname);// www.xgllseo.com
console.log(wo.hash);// #hhh
console.log(wo.search);// ?123=456&789=999
console.log(wo.query);// 123=456&789=999
console.log(wo.pathname);// /zp/js/23.php
console.log(wo.path);// /zp/js/23.php?123=456&789=999
console.log(wo.href);// https://sdeno.com:8080/zp/js/23.php?123=456&789=999#hhh

     

    var hh=url.format({
 protocol: 'http:',
 host: 'www.example.com',
 pathname: '/p/a/t/h',
 search: 'query=string'
});
console.log(url.parse(hh).href);//http://www.example.com/p/a/t/h?query=string

     

     

    url.resolve('http://www.example.com/foo/bar', '../baz');
/* =>
 
http://www.example.com/baz
 
*/

     

  • nodejs ejs模板

    node.js node js ejs 模板循环 jquery ejs 笔记

     

    <% %> //解析js代码
<% for(var i=0; i<4; ++i) { %> 
   <% if(i==2){ break; }%>
   <p><a href=#"><%= i %>this is a link!</a> </p>
<% } %>

<%= code %> //不解析html标签，直接输出html标签
<%- code %> //解析html标签

    循环结果

    ejsmuban

     

    js和css的获取，都要放在指定目录

    <link rel="stylesheet" type="text/css" href="/1.css" />
<script src="/javascripts/ejs.min.js"></script>

     

    引入其他模板

    <%- include foot %>  //引入foot.ejs

     

    json ajax get

    <script src="/javascripts/ejs_production.js"></script>
    <script type = "text/javascript" > 
function myfunction(){ 
  var data='{"title":"cleaning","supplies":["mop","broom","duster"]}'; 
  var html = new EJS({url: './mm/cleaning.ejs'}).render(JSON.parse(data)); 
  document.getElementById("div1").innerHTML=html; 
} 
</script>
    <button onclick = "myfunction()" >点击</button> <div id="div1"></div>
    .\public\mm\cleaning.ejs 内容已经存放的目录

<h1><%= title %></h1> 
<ul> 
  <% for(var y=0;y<supplies.length;y++) { %> 
   <li><a href='<%= supplies[y] %>'><%= supplies[y] %></a> </li> 
  <% } %> 
</ul>