ASP.NET使aspx页面能接受HTML,asp的页面传送的文件
ASP.NET使aspx页面能接受HTML,asp的页面传送的文件 aspx接受aspx页面的文件很简单,用HtmlInputFile,就可以了,但是如果接受Html页面post的文件
就不怎么好办了,我仿照asp的方法做法如下,自己测试通过,拿出来给大家共享,可以限制
文件内容,类型,大小,自定义存储位置,在congfig.xml内
html页的内容:(来自FCKeditor)
<html>
<head>
<title>FCKeditor - Uploaders Tests</title>
<script language='javascript'>
function SendFile()
{
var sUploaderUrl = cmbUploaderUrl.value ;
if ( sUploaderUrl.length == 0 )
sUploaderUrl = txtCustomUrl.value ;
if ( sUploaderUrl.length == 0 )
{
alert( 'Please provide your custom URL or select a default one' ) ;
return ;
}
eURL.innerHTML = sUploaderUrl ;
txtUrl.value = '' ;
frmUpload.action = sUploaderUrl ;
frmUpload.submit() ;
}
function OnUploadCompleted( errorNumber, fileUrl, fileName, customMsg )
{
switch ( errorNumber )
{
case 0 : // No errors
txtUrl.value = fileUrl ;
alert( 'File uploaded with no errors' ) ;
break ;
case 1 : // Custom error
alert( customMsg ) ;
break ;
case 10 : // Custom warning
txtUrl.value = fileUrl ;
alert( customMsg ) ;
break ;
case 201 :
txtUrl.value = fileUrl ;
alert( 'A file with the same name is already available. The uploaded file has been renamed to '' + fileName + ''' ) ;
break ;
case 202 :
alert( 'Invalid file' ) ;
break ;
case 203 :
alert( 'Security error. You probably don't have enough permissions to upload. Please check your server.' ) ;
break ;
default :
alert( 'Error on file upload. Error number: ' + errorNumber ) ;
break ;
}
}
</script>
</head>
<body>
<table cellSpacing='0' cellPadding='0' width='100%' border='0' height='100%'>
<tr>
<td>
<table cellSpacing='0' cellPadding='0' width='100%' border='0'>
<tr>
<td nowrap style='height: 43px'>
Select the 'File Uploader' to use:<br>
<select id='cmbUploaderUrl' name='Select1'>
<option selected value='asp/upload.asp'>ASP</option>
<option value='php/upload.php'>PHP</option>
<option value='Upload.aspx?type=image'>aspx</option>
</select>
</td>
<td nowrap style='height: 43px'> </td>
<td width='100%' style='height: 43px'>
Custom Uploader URL:<BR>
<input id='txtCustomUrl' style='WIDTH: 100%; BACKGROUND-COLOR: #dcdcdc' disabled type='text'>
</td>
</tr>
</table>
<br>
<table cellSpacing='0' cellPadding='0' width='100%' border='0'>
<tr>
<td noWrap>
<form id='frmUpload' target='UploadWindow' enctype='multipart/form-data' action='' method='post'>
Upload a new file:<br>
<input type='file' name='NewFile'><br>
<input type='button' value='Send it to the Server' onclick='SendFile();'>
</form>
</td>
<td style='WIDTH: 16px'> </td>
<td vAlign='top' width='100%'>
Uploaded File URL:<br>
<INPUT id='txtUrl' style='WIDTH: 100%' readonly type='text'>
</td>
</tr>
</table>
<br>
Post URL: <span id='eURL'> </span>
</td>
</tr>
<tr>
<td height='100%'>
<iframe name='UploadWindow' width='100%' height='100%'></iframe>
</td>
</tr>
</table>
</body>
</html>
upload.aspx的内容:
<%@ Page Language='C#' AutoEventWireup='true' CodeFile='Upload.aspx.cs' Inherits='Upload'%>
下面是后台代码:
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.IO;
using System.Text;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Xml;
using System.Collections.Specialized;
public partial class Upload : System.Web.UI.Page
{
public void SendResults(int errorNumber, string fileUrl, string fileName, string customMsg)
{
StringBuilder text = new StringBuilder();
text.Append('<script type=\'text/javascript\'>');
text.Append('window.parent.OnUploadCompleted(' + errorNumber + ',\'' + fileUrl.Replace('\'', '\\\'') + '\',\'' + fileName.Replace('\'', '\\\'') + '\',\'' + customMsg.Replace('\'', '\\\'') + '\') ;\n');
text.Append(' </script>');
Response.Write(text.ToString());
Response.End();
}
public void GetConfig(string type, out string[] allowedExt, out string[] denyedExt,out string savePath,out long maxSize)
{
XmlDocument doc = new XmlDocument();
doc.Load(Server.MapPath(@'.\Config.xml'));
XmlElement root=doc.DocumentElement;
XmlNodeList imageNodelist=root.GetElementsByTagName(type);
allowedExt = imageNodelist[0].FirstChild.InnerText.Trim().Split('|');
denyedExt = imageNodelist[0].LastChild.InnerText.Trim().Split('|');
savePath = root.GetElementsByTagName('userPath').Item(0).InnerText.Trim();
try
{
maxSize = Convert.ToInt64(root.GetElementsByTagName('maxSize').Item(0).InnerText.Trim());
}
catch { maxSize = 10*1024; }
}
protected void Page_Load(object sender, EventArgs e)
{
string[] allowedExt = new string[] { }, denyedExt = new string[] { };
string savePath = String.Empty;
long maxSize = 10000;
string type = Request.QueryString['Type'];
if(type!=null&&type!=string.Empty)
type=type.ToLower();
else
type='file';
if (type == 'image')
{
GetConfig('image', out allowedExt, out denyedExt, out savePath,out maxSize);
}
if (type == 'file')
{
GetConfig('file', out allowedExt, out denyedExt, out savePath, out maxSize);
}
if (type == 'flash')
{
GetConfig('flash', out allowedExt, out denyedExt, out savePath, out maxSize);
}
if (savePath == string.Empty||savePath=='')
savePath = '~/UserFiles/';
if(!savePath.EndsWith('/'))savePath+='/';
/*********************************************************************************
byte[] bytes1 = System.Text.Encoding.Default.GetBytes('这是字符串\n\n\n\n');
byte[] bytes2 = new byte[] { 1, 33, 23, 3, 0, 56, 55, 235, 5 };//二进制数
byte[] bytes = new byte[bytes1.Length + bytes2.Length];
//合并二进制流
MemoryStream ms = new MemoryStream(bytes);
ms.Write(bytes1, 0, bytes1.Length);
ms.Write(bytes2, 0, bytes2.Length);
int count = 0, pos = 0;
//开始找四个'\n'
for (int i = 0; i < bytes.Length; i++)
{
if (bytes[i] == (int)'\n')
{
count++;
if (count == 4)
{
pos -= 4;
break;
}
}
}
if (count == 4)
{
//这里,bytes字节数组里从0 到 pos 的位置就是你要的字符串
//从pos + 5 开始到最后,就是你要的二进制
}
**********************************************************************************/
byte[] fileData, formData;
formData = Request.BinaryRead(Request.ContentLength);
string head = String.Empty;
Encoding encoding = Encoding.UTF8;
long pos = 0;
for (long i = 0; i < formData.LongLength; i++)
{
if (formData[i] == (byte)'\r' && formData[i + 1] == (byte)'\n' && formData[i + 2] == (byte)'\r' && formData[i + 3] == (byte)'\n')
{
pos = i;
break;
}
}
if (pos == 0) { Response.End(); return; }
head = encoding.GetString(formData, 0, (int)pos);
fileData = new byte[formData.LongLength - pos - 3];
Array.Copy(formData, pos + 4, fileData, 0, formData.LongLength - pos - 4);
/************************************************************************************************
//传来的表单形式是:
//'-----------------------------7d5fa3820f84\r\nContent-Disposition: form-data; name=\'NewFile\'; filename=\'F:\\Documents\\4(10995).jpg\'\r\nContent-Type: image/pjpeg\r\n\r\n
//后面是文件数据
************************************************************************************************/
head = head.ToLower();
head = head.Remove(0, head.IndexOf('\r\n') + 2);
head = head.Replace('\'', '');
string postFileName = string.Empty;
string fileName;//no path
string fileType, fileExt;
postFileName = head.Substring(0, head.IndexOf('\r\n'));//Content-Disposition: form-data; name=\'NewFile\'; filename=\'F:\\Documents\\4(10995).jpg\'
fileType = head.Remove(0, postFileName.Length + 3);//returns:Content-Type: image/pjpeg
postFileName = postFileName.Substring(postFileName.IndexOf('filename=') + 'filename='.Length);//C:\path\name
fileName = Path.GetFileName(postFileName);
fileExt = fileName.Substring(fileName.LastIndexOf('.') + 1);
if (fileData.LongLength > maxSize) {
SendResults(2, ResolveUrl(savePath + fileName), fileName, 'Too large');
return;
}
bool isallow=false;
foreach(string ext in denyedExt){
if (ext == fileExt) {
isallow = false;
SendResults(202, ResolveUrl(savePath + fileName), fileName, 'forrbiden');
return;
}
}
foreach (string ext in allowedExt) {
if (ext == fileExt) { isallow = true; break; }
}
if ( isallow)
{
string tmpPath = Server.MapPath(savePath);
if (!Directory.Exists(tmpPath)) {
try
{
Directory.CreateDirectory(tmpPath);
}
catch { SendResults(200, ResolveUrl(savePath + fileName), fileName, '没有写入权限'); }
}
//Response.BinaryWrite(fileData);
FileStream savefileStream= new FileStream(tmpPath+fileName, FileMode.OpenOrCreate, FileAccess.ReadWrite);
for (long i = 0; i < fileData.LongLength; i++)
{
savefileStream.WriteByte(fileData[i]);
}
savefileStream.Close();
SendResults(0, ResolveUrl(savePath + fileName), fileName, 'No errors');
}
}
}
config.xml
<?xml version='1.0' encoding='utf-8'?>
<upload>
<enabled>true</enabled>
<userPath></userPath>
<maxSize>500000</maxSize><!--unit is byte-->
<file>
<allow>zip|rar</allow>
<deny>php|php3|php5|phtml|asp|aspx|ascx|jsp|cfm|cfc|pl|bat|exe|dll|reg|cgi</deny>
</file>
<image>
<allow>jpg|gif|jpeg|png|bmp</allow>
<deny></deny>
</image>
<flash>
<allow>swf|fla</allow>
<deny></deny>
</flash>
</upload>