FileUpload - Checking Resource data prior to upload

Question

Hi All,
Is there a way of examining the Resource data before a file is uploaded, i.e. to prevent them uploading files above a certain size or with a certain extension? I can't see how I can do this until the file has already been uploaded.
Cheers,
Steve

Answer 1

// for checking the size of the resource use the following code.
public byte[] getByteArray(InputStream ipStr) {
byte[] bytArr = null;
try {
     bytArr = new byte[ipStr.available()];
} catch (IOException e) {
     e.printStackTrace();
try {
     ipStr.read(bytArr);
} catch (IOException e1) {
     e1.printStackTrace();
          return bytArr;
// getting the resource that user has browsed          
IWDResource resource = element.getResDocumentUploaded();
// Getting the byte array of the resource selected
byte[] arrBIN = getByteArray(resource.read(false));
//checking If file size is less than 25 MB     
if(arrBIN.length < 25 * 1024 * 1024)
Using this code we can check if file uploaded is less than 25MB
for getting file extension of document uploaded one can use the following code
ublic static java.lang.String getFileExtension(
          java.lang.String strResourceName) {
          String strExtension = null;
          int iIndex = strResourceName.lastIndexOf(".");
          strExtension = strResourceName.substring(iIndex + 1);
          return strExtension;
IWDResource resource = element.getResDocumentUploaded();
String strResource = resource.getResourceName();
String strExtension = getFileExtension(strResource);
one can create another input fiels wich takes in the extension of the uploaded file and compare it with strExtension
string application = context_of_field acceptingextension
application.equalsIgnoreCase(strExtension)
Regards
Rohan.
Please do provide me points if this helps you .Thank you
Edited by: rohan Henry on May 27, 2008 11:05 AM
Edited by: rohan Henry on May 27, 2008 11:08 AM
Edited by: rohan Henry on May 27, 2008 11:09 AM