Re: [Simpleweb-Support] File upload progress

[-=}\\*/{=- <rui...@gm...>]

the server that i'm implementing over simple implements uploads...
since i inherit the code from previous version i did not check if simple
supports this... any way i leave you the code...

may not be perfect but is what i got... maybe you find it useful.

/*
 * Copyright 2005 Rui Damas
 */
package abc.kis.handler;

import abc.kis.Quest;
import abc.kis.Sponse;
import abc.kis.handler.abs.FileNameMatcher;
import java.io.IOException;
import java.io.InputStream;
import java.net.URLConnection;
import java.util.Date;

/**
 * A kiss handler to alow file download (upload to the client) width
 * support for the client to interrupt the download and continue later.
 */
public class Downloader extends FileNameMatcher {

  /**
   * Uploads a requested file to the client if it exists...
   * requires mime type mapping.
   *
   * <p>
   * Tries to resolve a file (using the <code>toHandle</code> resolver).
   * if such file is found, it will be sent to the client.<br/>
   * Before sending the content type is set using the KISSLetConfig mime
mapper
   * and the <code>"Date"</code> header is set to the file's last modified
   * date.<br/>
   * Simple skipping (continue download) is supported if an header named
   * 'range' is found in the request and it's value is 'bytes=????-'
   * where ???? is the number of bytes to skip in the file's stream to
upload
   * to the client.
   * </p>
   *
   * @return always <code>true</code>.
   */
  @Override
  public boolean handle(Quest quest, Sponse sponse,
    URLConnection toUpload) {
    try {
      // Support (simple) skipping
      long firstByteIndex = 0;
      String range = quest.getHeader("Range");
      if (range != null) {
        if (range.startsWith("bytes=")) {
          range = range.substring("bytes=".length());
          int minusIndex = range.indexOf('-');
          if (minusIndex > 0) {
            range = range.substring(0, minusIndex);
          }
          try {
            firstByteIndex = Long.parseLong(range);
            quest.logI("Skipping: %d bytes", firstByteIndex);
          } catch (NumberFormatException nfe) {
            quest.logT(nfe, "Unable to parse requested range");
          }
        }
      }

      // get stream and skip to first byte position
      InputStream toSend = toUpload.getInputStream();
      toSend.skip(firstByteIndex);

      // set response headers
      long toSendLength = toUpload.getContentLength();
      sponse.setContentLength((int) (toSendLength - firstByteIndex));
      sponse.setHeader("Content-range", "bytes " + firstByteIndex + "-"
        + (toSendLength - 1) + "/" + toSendLength);

      // set content type

      String mimeType = quest.getMimeTypes().
        getMimeTypeOrDefaultForPath(toUpload.getURL().getPath());

      sponse.setContentType(mimeType);

      // set date to file's last modified date
      long lastModified = toUpload.getLastModified();
      long current = new Date().getTime();
      long deltaSeconds = (current - lastModified) / 1000;
      int deltaSinceCurrent = (60 * 5);
      sponse.setHeader("Cache-Control", "s-maxage="
        + deltaSeconds + deltaSinceCurrent);
      sponse.setDate("Date", current);
      sponse.setDate("Expires", current + (1000 * deltaSinceCurrent));
      sponse.setDate("Last-Modified", lastModified);

      // send file stream
      sponse.send(toSend);
      quest.logI("Sent as \"%1$s\" ", mimeType);
    } catch (IOException ioe) {
      quest.logT(ioe, "File not completely sent");
    }
    return true;
  }
}


On 17 July 2012 12:47, Andrew Barlow <and...@de...> wrote:

> I wondered if the built in file upload mechanism for Simple would work
> with client-side upload "widgets" to show progress bars, etc.
>
> For example http://blueimp.github.com/jQuery-File-Upload/.
>
> Also, has anyone looked at being able to resume stalled or partial
> uploads, and how this might be achieved with Simple?
> Regards,
> Andy Barlow
>
>
>
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