Below is my code, I can upload files, but I cannot differentiate the file type using getContentType
My contentType is always multipart/form-data; boundary=---------------------------27292155374832
Why is it so?
Thank you for your help!
<%@ page import="java.io.*"%>
<%
String contentType = request.getContentType();
if ((contentType != null) && (contentType.indexOf("multipart/form-data") >= 0)) // multipart/form-data for sending file
{
//out.println(contentType.indexOf("multipart/form-data"));
DataInputStream in = new DataInputStream(request.getInputStream());
int formDataLength = request.getContentLength();
byte dataBytes[] = new byte[formDataLength];
int byteRead = 0;
int totalBytesRead = 0;
while (totalBytesRead < formDataLength) {
byteRead = in.read(dataBytes, totalBytesRead, formDataLength);
totalBytesRead += byteRead;
}
out.println(contentType);
if ( contentType != null )
{
if ( contentType.equals("image/jpeg") )
out.println(contentType);
else
out.println("not image");
}
String file = new String(dataBytes);
String saveFile = file.substring(file.indexOf("filename=\"") + 10);
saveFile = saveFile.substring(0, saveFile.indexOf("\n"));
saveFile = saveFile.substring(saveFile.lastIndexOf("\\") + 1,saveFile.indexOf("\""));
int lastIndex = contentType.lastIndexOf("=");
String boundary = contentType.substring(lastIndex + 1,contentType.length());
int pos;
pos = file.indexOf("filename=\"");
pos = file.indexOf("\n", pos) + 1;
pos = file.indexOf("\n", pos) + 1;
pos = file.indexOf("\n", pos) + 1;
int boundaryLocation = file.indexOf(boundary, pos) - 4;
int startPos = ((file.substring(0, pos)).getBytes()).length;
int endPos = ((file.substring(0, boundaryLocation)).getBytes()).length;
String filepath=session.getServletContext().getRealPath("/")+saveFile;
FileOutputStream fileOut = new FileOutputStream(filepath);
fileOut.write(dataBytes, startPos, (endPos - startPos));
fileOut.flush();
fileOut.close();
out.println("File saved as " +saveFile);
}
%>
<!-- Starts Here -->
<form method="post" ACTION="upload.jsp" name="uploadForm" ENCTYPE='multipart/form-data'>
<input type="file" name="uploadfile" />
<p>
<input type="submit" name="Submit" value="Submit">
<input type="reset" name="Reset" value="Reset">
<input type="hidden" name="action" value="upload">
</p>
</form>
<!-- Ends Here -->
{code}