node.js如何实现简单的图片上传代码详解

1.node-formidable

对文件上传提供帮助的组件

2.app.js

var formidable = require('formidable');
var http = require( 'http' );
var sys = require('sys');
 
http.createServer(function( request ,response ){
  if( request.url == '/upload' && request.method.toLowerCase() == 'post' )
  {
    console.log( 'upload requet ' )
    uploadRequest(request,response);
    return;
  }
  enterRequest(request,response)
}).listen(3000);
 
function enterRequest( request, response )
{
  response.writeHead( 200, { 'Content-type' : 'text/html' });
  response.end(
    '<form action = "/upload" enctype="multipart/form-data" method="post" >' +
    '<input type = "text" name = "title" /> <br>' +
    '<input type = "file" name="upload" multiple="multiple"/> <br/>'+
    '<input type="submit" value="Upload Now"/>' +
    '</form>'
  );
}
 
/**
 * 处理上传的逻辑
 * @param request
 * @param response
 */
function uploadRequest( request,response )
{
  var form = new formidable.IncomingForm();
  form.parse( request, function ( err, fields, files ) {
    response.writeHead(200, {'Content-type' : 'text/plain'});
    response.write('reviced upload file');
    response.end( sys.inspect(
      {
        fields : fields,
        files : files
      }) );
  });
}

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