Upload graphic files more than 4KB

[Grapez]

This is my Bean to upload the file. But I cant upload files more than 4KB. Whats the problem?

package Beans;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.ServletInputStream;
import java.util.Dictionary;
import java.util.Hashtable;
import java.io.PrintWriter;
import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;

public class FileUploadBean {

private String savePath, filepath, filename, contentType;
private Dictionary fields;

public String getFilename() {
return filename;
}

public String getFilepath() {
return filepath;
}

public void setSavePath(String savePath) {
this.savePath = savePath;
}

public String getContentType() {
return contentType;
}

public String getFieldValue(String fieldName) {
if (fields == null || fieldName == null)
return null;
return (String) fields.get(fieldName);
}

private void setFilename(String s) {
if (s==null)
return;

int pos = s.indexOf("filename=\"");
if (pos != -1) {
filepath = s.substring(pos+10, s.length()-1);
// Windows browsers include the full path on the client
// But Linux/Unix and Mac browsers only send the filename
// test if this is from a Windows browser
pos = filepath.lastIndexOf("\\");
if (pos != -1)
filename = filepath.substring(pos + 1);
else
filename = filepath;
}
}
private void setContentType(String s) {
if (s==null)
return;

int pos = s.indexOf(": ");
if (pos != -1)
contentType = s.substring(pos+2, s.length());
}

public void doUpload(HttpServletRequest request) throws IOException {
ServletInputStream in = request.getInputStream();

byte[] line = new byte[128];
int i = in.readLine(line, 0, 128);
if (i < 3)
return;
int boundaryLength = i - 2;

String boundary = new String(line, 0, boundaryLength); //-2 discards the newline character
fields = new Hashtable();

while (i != -1) {
String newLine = new String(line, 0, i);
if (newLine.startsWith("Content-Disposition: form-data; name=\"")) {
if (newLine.indexOf("filename=\"") != -1) {
setFilename(new String(line, 0, i-2));
if (filename==null)
return;
//this is the file content
i = in.readLine(line, 0, 128);
setContentType(new String(line, 0, i-2));
i = in.readLine(line, 0, 128);
// blank line
i = in.readLine(line, 0, 128);
newLine = new String(line, 0, i);
PrintWriter pw = new PrintWriter(new BufferedWriter(new
FileWriter((savePath==null? "" : savePath) + filename)));
while (i != -1 && !newLine.startsWith(boundary)) {
// the problem is the last line of the file content
// contains the new line character.
// So, we need to check if the current line is
// the last line.
i = in.readLine(line, 0, 128);
if ((i==boundaryLength+2 || i==boundaryLength+4) // + 4 is eof
&& (new String(line, 0, i).startsWith(boundary)))
pw.print(newLine.substring(0, newLine.length()-2));
else
pw.print(newLine);
newLine = new String(line, 0, i);

}
pw.close();

}
else {
//this is a field
// get the field name
int pos = newLine.indexOf("name=\"");
String fieldName = newLine.substring(pos+6, newLine.length()-3);
//System.out.println("fieldName:" + fieldName);
// blank line
i = in.readLine(line, 0, 128);
i = in.readLine(line, 0, 128);
newLine = new String(line, 0, i);
StringBuffer fieldValue = new StringBuffer(128);
while (i != -1 && !newLine.startsWith(boundary)) {
// The last line of the field
// contains the new line character.
// So, we need to check if the current line is
// the last line.
i = in.readLine(line, 0, 128);
if ((i==boundaryLength+2 || i==boundaryLength+4) // + 4 is eof
&& (new String(line, 0, i).startsWith(boundary)))
fieldValue.append(newLine.substring(0, newLine.length()-2));
else
fieldValue.append(newLine);
newLine = new String(line, 0, i);
}
//System.out.println("fieldValue:" + fieldValue.toString());
fields.put(fieldName, fieldValue.toString());
}
}
i = in.readLine(line, 0, 128);

} // end while
}
}

 

[egobbitz]

Not sure if this helps, but there is a 4KB limit to the amount of information that can be used in a GET method through HTTP form. I think this is because it sends the data in the URL. From coding html forms, I know that in order to get around that you must use the POST method.

Hope that helps.