FileUploadWithAction - Cocoon Wiki

File Upload with processing in an Action

The code below is tested with Cocoon 2.03. Refer to the end of the page if you want to use it with Cocoon >= 2.1

Here's some sample code to demonstrate how to upload a file and do the processing of this in an Action.

Example of an upload form:

<html>
  <body>
    <form action="upload" method="post" enctype="multipart/form-data">
      File:  <input type="file" name="uploadfile" size="50">
      <input type="submit"/>
    </form>
  </body>
</html>

Example of an Action to get the uploaded file

import org.apache.avalon.framework.thread.ThreadSafe;
import org.apache.avalon.framework.parameters.Parameters;
import org.apache.avalon.framework.logger.AbstractLogEnabled;
import org.apache.cocoon.acting.Action;
import org.apache.cocoon.environment.Redirector;
import org.apache.cocoon.environment.SourceResolver;
import org.apache.cocoon.environment.ObjectModelHelper;
import org.apache.cocoon.environment.Request;
import org.apache.cocoon.components.request.multipart.FilePart;
import org.apache.cocoon.components.request.multipart.FilePartFile;

import java.util.Map;
import java.util.Collections;
import java.io.File;

public class UploadTest 
  extends AbstractLogEnabled 
  implements Action, ThreadSafe
{
    public Map act(Redirector redirector, SourceResolver resolver,
                   Map objectModel, String source, Parameters par)
        throws Exception
    {
        Request request = ObjectModelHelper.getRequest(objectModel);
        FilePart filePart = (FilePart) request.get("uploaded_file");

        File file = ((FilePartFile)filePart).getFile();
        getLogger().debug("Uploaded file = " + file.getCanonicalPath());
        // here you can open an InputStream on the file or whatever
        // you may also want to delete the file after using it
        return Collections.EMPTY_MAP;
    }
}

For concept and configuration information for file uploads see FileUploadsWithCocoon

Making it work on Cocoon 2.1

If you are using Cocoon >= 2.1, you'll have to change the following imports:

import org.apache.cocoon.components.request.multipart.FilePart;
import org.apache.cocoon.components.request.multipart.FilePartFile;

to:

import org.apache.cocoon.servlet.multipart.Part;
import org.apache.cocoon.servlet.multipart.PartOnDisk;

Consequently, the following lines

FilePart filePart = (FilePart) request.get("uploaded_file");

File file = ((FilePartFile)filePart).getFile();

should read

Part filePart = (Part) request.get("uploaded_file");

File file = ((PartOnDisk)filePart).getFile();

Warning, this won't work if the servlet container stores the uploaded file in memory (PartInMemory) instead of creating a temporary file (PartOnDisk).

Attachment: Database