JavaScript 上传文件(psd,压缩包等),图片,视频的实现方法

// 上传目标触发点 <input type="file" class="upvideo" name="upvideo" id="fileupload1" /> // 引入插件 <script type="text/javascript" src="{$IMG}/bstage/js/jquery.form.js" language="javascript"></script> /**方法调用**/ setFileUpload({  name: 'fileupload1',   backfun: upback1,   beforefun: checkUp1,  loadfun:loadup,  phpUrl: '/ossphp/php/get.php?ft=video' }); // 上传前验证 function checkUp1(n){  // 查看视频大小(mb)  var fileObj = document.getElementById(n).files[0];  var relSize = parseInt(fileObj.size/1024/1024);  if(relSize > 10){ // 大于10mb   alert('提示','视屏超过10MB,请重新上传！');   return false;  }  // 查看视频类型  var tv_id =document.getElementById(n).value;//根据id得到值  var index= tv_id.indexOf(".");  tv_id=tv_id.substring(index).toLowerCase();  if(tv_id!=".rb"&&tv_id!=".rmvb"&&tv_id!=".mp4"&&tv_id!=".flv"){   alert("提示","不是指定视频格式,重新选择");   return false;  }  return true; } //上传中 function loadup(){ } // 上传成功后操作 function upback1(data){    // data 成功后的参数 }  /**上传功能封装**/ function setFileUpload(options){  var n = options.name;  var phpUrl = options.phpUrl;  var backfun = options.backfun;  var beforefun = options.beforefun;  var loadfun = options.loadfun;   var accessid = '';  var accesskey = '';  var host = '';  var policyBase64 = '';  var signature = '';  var callbackbody = '';  var filename = '';  var dirname = '';  var expire = 0;  var upflag = true;  if(phpUrl==null || phpUrl==''){console.log('phpurl is null');return false;}  if(n==null || n==''){console.log('object is null');return false;}  var backfun1 = $.isFunction(backfun) ?       backfun :       function(success, error){        console.log('no backfun');       };  var beforefun1 = $.isFunction(beforefun) ?       beforefun :       function(success, error){        return true;       };  var loadfun1 = $.isFunction(loadfun) ?       loadfun :       function(success, error){        return true;       };  var obj = $('#'+n);  obj.change(function(){   if(beforefun1(n)){    if(n=="fileupload1"){     fileEmb1(n);    }else if(n == 'fileupload2'){     fileEmb2(n);    }else if(n == 'fileupload3'){     fileEmb3(n);    }   }  });  function fileEmb1(n){   //oss add   $("#"+n).attr('name','file');   var file1 = $("#"+n).val();    var fileName = getFileName(file1);   phpUrl = phpUrl + '&fname='+fileName;   get_signature();   var ldot = fileName.lastIndexOf(".");   var filetype = fileName.substring(ldot + 1);   $("#"+n).wrap("<form id='myupload1' action='"+host+"' method='post' enctype='multipart/form-data'></form>");   $("#myupload1").prepend("<input type='hidden' value='' name='name' id='name'></input><input type='hidden' value='"+dirname+"."+filetype+"' name='key' ></input><input type='hidden' value='"+policyBase64+"' name='policy' id='policy'></input><input type='hidden' value='"+accessid+"' name='OSSAccessKeyId' id='OSSAccessKeyId'></input><input type='hidden' value='200' name='success_action_status' id='success_action_status' ></input><input type='hidden' value='"+callbackbody+"' name='callback' id='callback'></input><input type='hidden' value='"+signature+"' name='signature' id='signature'></input>");   //speed_width进度条类   //percent进度数字类   //load_content上传区域   $('#myupload1').ajaxSubmit({    dataType: 'json', //数据格式为json    data:'',    beforeSend: function() {     loadfun1();     if(!upflag)return false;     upflag=false;    },    uploadProgress: function(event, position, total, percentComplete) {     $('.upck_b').hide();     $('.videspeed').show();     percentComplete = percentComplete>=100?99:percentComplete;     var percentVal = percentComplete + '%'; //获得进度     $('.speed_num').css('width',percentVal);     $('.persent_em').html(percentComplete);    },    success: function(data) { //成功      $('.load_content').html('<em >图片上传</em>');      //上传成功后还原      $("#"+n).attr('name','');      setFileUpload(options);      upflag=true;      backfun1(data);    },    error:function(xhr){ //上传失败     $('.load_content').html('<em >图片上传</em>');     upflag=true;    }   });  }  function getFileName(path){   var pos1 = path.lastIndexOf('/');   var pos2 = path.lastIndexOf('//');   var pos = Math.max(pos1, pos2)   if( pos<0 )    return path;   else    return path.substring(pos+1);  }  now = timestamp = Date.parse(new Date()) / 1000;  new_multipart_params = '';  function send_request(){   var xmlhttp = null;   if (window.XMLHttpRequest)   {    xmlhttp=new XMLHttpRequest();   }   else if (window.ActiveXObject)   {    xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");   }   if (xmlhttp!=null && phpUrl)   {    //phpUrl = '/ossphp/php/get.php?ft=resources';    xmlhttp.open( "GET", phpUrl, false );    xmlhttp.send( null );    return xmlhttp.responseText;   }   else   {    alert("Your browser does not support XMLHTTP.");   }  };  function get_signature()  {   //可以判断当前expire是否超过了当前时间,如果超过了当前时间,就重新取一下.3s 做为缓冲   now = timestamp = Date.parse(new Date()) / 1000;    //if (expire < now + 3)   //{    body = send_request()    var obj = eval ("(" + body + ")");    host = obj['host']    policyBase64 = obj['policy']    accessid = obj['accessid']    signature = obj['signature']    expire = parseInt(obj['expire'])    callbackbody = obj['callback']    dirname = obj['dir']    return true;   //}  }; }