ASPX File Upload
Does anyone know how to check the size of a file before its
uploaded to the server?
My problem is if someone tries to upload a file that exceeds
the max limit an exception is thrown before any kind of server side
validation can be performed.
asp.net VB
IIS6
Thanks,
J
Basically it can't be done client side as you would need file
permission set
that no browser will allow. There is a thread on the ASP.Net
forum that may
be of some help
http://forums.asp.net/thread/1187618.aspx
It would appear that the answer is that you need to handle
the exception
server side.
Paul Whitham
Certified Dreamweaver MX2004 Professional
Adobe Community Expert - Dreamweaver
Valleybiz Internet Design
www.valleybiz.net
"bigj9901" <[email protected]> wrote in
message
news:f22b05$a7v$[email protected]..
> Does anyone know how to check the size of a file before
its uploaded to
> the
> server?
>
> My problem is if someone tries to upload a file that
exceeds the max limit
> an
> exception is thrown before any kind of server side
validation can be
> performed.
>
> asp.net VB
> IIS6
>
> Thanks,
> J
>
>
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Hi,
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I have uploaded content using input tag of type file and posted to jsp as multipart/form-data type
in that jsp i am using following code to display the content in browser but only first content is displayed How can i modify it to show all content in the file ..
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else if(fileItem.getContentType().equals("text/plain"))
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<%
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%> </p> <%
%>
</body>
</html>
Edited by: Amit_Joshi on Nov 13, 2007 10:58 PMWell Well Well..
That would not work...
What you have to do is save the uploaded file content on to a location and then pass the fileName as a request parameter to a deidicated which displays the contents of that file.
Just as an example
<html>
<head>
<title>File Upload Display</title>
</head>
<body>
<%
//ServletOutputStream sout=response.getOutputStream();
StringBuilder strBuilder = new StringBuilder();
int count=0;
String f;
f=request.getParameter("filedb");
DBManager dbm = new DBManager();
//dbm.createTable("mms3");
//log.info("In JSP : "+ f);
//dbm.insert_data(f,"mms3");
%>
<%
if (ServletFileUpload.isMultipartContent(request)){
ServletFileUpload servletFileUpload = new ServletFileUpload(new DiskFileItemFactory());
List fileItemsList = servletFileUpload.parseRequest(request);
strBuilder.append("<?xml version=\"1.0\" encoding=\"UTF-8\" ?>").append('\r').append('\n').append("<xpage version=\"1.0\">").append('\r').append('\n');
String optionalFileName = "";
FileItem fileItem = null;
Iterator it = fileItemsList.iterator();
ServletOutputStream outputStream=null;
while (it.hasNext()){
FileItem fileItemTemp = (FileItem)it.next();
%>
Name-value Pair Info:
Field name: <%= fileItemTemp.getFieldName() %><br/>
Field value: <%= fileItemTemp.getString() %><br/>
<%
if (fileItemTemp.getFieldName().equals("filename"))
optionalFileName = fileItemTemp.getString();
if(!fileTempItem.isFormFiled()){
String fileName = fileItem.getName();
fileItem.write(optionalFileName);
%>
Uploaded File Info:
Content type: <%= fileItem.getContentType() %><br/>
Field name: <%= fileItem.getFieldName() %><br/>
File name: <%= fileName %><br/>
<%
if(fileItem.getContentType().equals("image/jpeg") || fileItem.getContentType().equals("image/pjeg")) {
%>
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<%
%>
</body>
</html>a sample code snippet for FileServlet.
String fileName = request.getParameter(fileName);
File file = new File(fileName);
if(!file.exists())
return;
// If JSP
String mimeType = application.getMimeType("fileName");
If you are using servlet
String mimeType = this.getServletContext().getMimeType(fileName);
response.setContentType(mimeType);
response.setHeader("Content-Disposition","inline;filename=\\"+fileName+"\\");
BufferedOutputStream out1 = null;
InputStream in = null;
if(mimeType == null)
mimeType = "application/octet-stream";
try{
in = new FileInputStream(f);
response.setContentLength(in.available());
BufferedOutputStream out1 = new BufferedOutputStream(response.getOutputStream(),1024);
int size = 0;
byte[] b = new byte[1024];
while ((size = in.read(b, 0, 1024)) > 0)
out1.write(b, 0, size);
}catch(Exception exp){
}finally{
if(out1 != null){
try{
out1.flush();
out1.close();
}catch(Exception e){}
if(in != null){
try{in.close();}catch(Exception e){}
} Hope that might answer your question :)
However,this is not the recommended way of doing this make use of MVC pattern.Would be a better approach.
you might think of googling on this and can findout what is the best practise followed for problems of this sort
REGARDS,
RaHuL
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