<%@ language="javascript"%>

<%

var self = Request.serverVariables("SCRIPT_NAME");

if (Request.serverVariables("REQUEST_METHOD")=="POST")

{

        var oo = new uploadFile();

        oo.path = "myFile";                        //存放路径,为空表示当前路径,默认为uploadFile

        oo.named = "file";                        //命名方式,date表示用日期来命名,file表示用文件名本身,默认为file

        oo.ext = "all";                                //允许上传的扩展名,all表示都允许,默认为all

        oo.over = true;                                //当存在相同文件名时是否覆盖,默认为false

        oo.size = 1*1024*1024;                //最大字节数限制,默认为1G

        oo.upload();

        Response.write('<script type="text/javascript">location.replace("'+self+'")</script>');

}



//ASP无组件上传类

function uploadFile()

{

    var bLen  = Request.totalBytes;

    var bText = Request.binaryRead(bLen);

    var oo = Server.createObject("ADODB.Stream");

    oo.mode = 3;

        this.path = "uploadFile";

        this.named = "file";

        this.ext = "all";

        this.over = false;

        this.size = 1*1024*1024*1024;        //1GB



        //文件上传        

        this.upload = function ()

        {

                var o = this.getInfo();

                if (o.size>this.size)

                {

                        alert("文件过大,不能上传!");

                        return;                

                }

                var f = this.getFileName();

                var ext = f.replace(/^.+\./,"");

                if (this.ext!="all"&&!new RegExp(this.ext.replace(/,/g,"|"),"ig").test(ext))

                {

                        alert("目前暂不支持扩展名为 "+ext+" 的文件上传!");

                        return;

                }

                if (this.named=="date")

                {

                        f = new Date().toLocaleString().replace(/\D/g,"") + "." + ext;

                }



                oo.open();

                oo.type = 1;

                oo.write(o.bin);

                this.path = this.path.replace(/[^\/\\]$/,"$&/");

                var fso = Server.createObject("Scripting.FileSystemObject");

                if(this.path!=""&&!fso.folderExists(Server.mapPath(this.path)))

                {

                        fso.createFolder(Server.mapPath(this.path));

                }

                try

                {

                        oo.saveToFile(Server.mapPath(this.path+f),this.over?2:1);

                        alert("上传成功!");

                }

                catch(e)

                {

                        alert("对不起,此文件已存在！");

                }

                oo.close();

                delete(oo);



        }



        //获取二进制和文件字节数

        this.getInfo = function ()

        {

                oo.open();

                oo.type=1;

                oo.write(bText);

                oo.position = 0;                                

                oo.type=2;

                oo.charset="unicode";

                var gbCode=escape(oo.readText()).replace(/%u(..)(..)/g,"%$2%$1");

                var sPos=gbCode.indexOf("%0D%0A%0D%0A")+12;

                var sLength=bLen-(gbCode.substring(0,gbCode.indexOf("%0D%0A")).length/3)-sPos/3-6;

                oo.close();

        

                oo.open();

                oo.type = 1;        

                oo.write(bText);

                oo.position=sPos/3;

                var bFile=oo.read(sLength);

                oo.close();

                

                return { bin:bFile, size:sLength };

        }



        //获取文件名        

        this.getFileName = function ()

        {

                oo.open();

                oo.type = 2;

                oo.writeText(bText);

                oo.position = 0;

                oo.charset = "gb2312";

                var fileName = oo.readText().match(/filename=\"(.+?)\"/i)[1].split("\\").slice(-1)[0];

                oo.close();

                return fileName;

        }

        

        function alert(msg)

        {

                Response.write('<script type="text/javascript">alert("'+msg+'");</script>');

        }

}

%>



<html>

<head>

  <title>ASP无组件上传类(JS版)</title>

  <meta http-equiv="content-Type" content="text/html; charset=gb2312">

</head>

<body>

  <form action="<%=self%>" method="post" enctype="multipart/form-data" onSubmit="return (this.upFile.value!='');"> 

    <input type="file" name="upFile"/>

    <input type="submit" value="上传文件"/>

  </form>

</body>

</html>