Upload

Upload

org.apache.tapestry.form.Upload

Description
A form element used to handle file uploads. The uploaded file is represented by an instance of IUploadFile. By default the upload component limits the size of uploads to 10,000,000 bytes. To alter this limit you can add the following to your *.application specification:

  <extension name="org.apache.tapestry.multipart-decoder"
      class="org.apache.tapestry.multipart.DefaultMultipartDecoder">
    <configure property-name="maxSize" type="double" value="134217728"/>
        <!-- where the value is the maximum size you want to allow -->
  </extension>

Alternatively you can use:

  DefaultMultipartDecoder.getSharedInstance().setMaxSize(12345678);

Setting the size to -1 will remove any limit checking.

See Also
Form

Parameters

Name	Type	Direction	Required	Default	Description
file	`IUploadFile`	out	yes		Updated, when the form is submitted, with the name and content uploaded.
disabled	boolean	in	no	false	If true, then (on render) the "disabled" attribute is written into the tag and on submit, the upload will not update its file parameter. Note Netscape Navigator 4 will ignore this attribute.

Body: removed
Informal parameters: allowed
Reserved parameters: "name", "type"

Examples

Provides a file upload form and displays the results of the upload.

To save the uploaded file to the WEB context path, rather than the default java path, use the ServletContext.getRealPath() method to obtain the web application's directory path.

<form jwcid="@Form" listener="ognl:listener.formSubmit">
 <table bgcolor="#c0c0c0" cellpadding="4">
  <tr>
   <td colspan="2">File:&nbsp;<input jwcid="@Upload" file="ognl:file" type= "file"></input></td>
  </tr>
  <tr>
   <td colspan="2"><input type= "submit"value="Upload"></input></td>
  </tr>
  <tr>
   <td colspan="2"><hr></td>
  </tr>
  <tr>
   <td>Filename:</td><td><span jwcid="@Insert" value="ognl:filename"/>/td>
  </tr>
  <tr>
   <td>Client path:</td><td><span jwcid="@Insert" value="ognl:clientPath"/></td>
  </tr>
  <tr>
   <td>Server Path:</td><td><span jwcid="@Insert" value="ognl:serverPath"/></td>
  </tr>
  <tr>
   <td>File Truncated:</td><td><span jwcid="@Insert" value="ognl:fileTruncated"/></td>
  </tr>
  <tr>
   <td>File Size:</td><td><span jwcid="@Insert" value="ognl:fileSize" format="ognl:@UploadPage@SIZE_FORMAT"/>&nbsp;bytes</td>
  </tr>
 </table>
</form>



public class UploadPage extends BasePage {
    public static final Format SIZE_FORMAT = NumberFormat.getNumberInstance();    
    private IUploadFile file;
    private File serverFile;

    public IUploadFile getFile() { return file; }

    public void setFile(IUploadFile value) {
        file = value;
    }

    public String getFilename() { 
        if (file != null) {
            return file.getFileName();
        } else {
            return "";   
        }        
    }

    public String getClientPath() { 
        if (file != null) { 
            return file.getFilePath(); 
        } else {
            return ""; 
        } 
    } 
    
    public String getServerPath() { 
        if (serverFile != null) { 
            return serverFile.getAbsolutePath(); 
        } else { 
            return "";  
        }
    }

    public long getFileSize() { 
        if (serverFile != null) {
            return serverFile.length();
        } else {
            return 0;   
        }        
    }

    public boolean isFileTruncated() { 
        if (file != null) {
            return file.isTruncated();
        } else {
            return false;   
        }        
    }

    public void formSubmit(IRequestCycle cycle) { 
        InputStream fis = file.getStream(); 
        FileOutputStream fos = null;
         
        try { 
            fos = new FileOutputStream(new  File(file.getFileName()));
            byte[] buffer = new byte[1024];  
            while (true) {            
                int length = fis.read(buffer);  
                if (length <  0) {
                    break;
                }
                fos.write(buffer, 0, length);               
            }
            fis.close();
            fos.close();
            serverFile = new File(file.getFileName());

        } catch (IOException ioe) {
            ioe.printStackTrace();            
        } finally {
            if (fis != null) {
                try { fis.close(); } catch (IOException ioe) {}
            }   
            if (fos != null) {
                try { fos.close(); } catch (IOException ioe) {}
            }
        }
    }

    protected void initialize() {
        file = null;
        serverFile = null;
    }
}