Android Open Source - fh-android-sdk Range File Async Http Response Handler

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License

The source code is released under:

Copyright (c) 2014 FeedHenry Ltd, All Rights Reserved. Please refer to your contract with FeedHenry for the software license agreement. If you do not have a contract, you do not have a license to use...

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Java Source Code

package com.loopj.android.http;
//w ww .j a v a2  s  .  c  o m
import android.util.Log;
import org.apache.http.Header;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.StatusLine;
import org.apache.http.HttpStatus;
import org.apache.http.client.HttpResponseException;
import org.apache.http.client.methods.HttpUriRequest;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;


public abstract class RangeFileAsyncHttpResponseHandler extends FileAsyncHttpResponseHandler {
  private static final String LOG_TAG = "RangeFileAsyncHttpResponseHandler";

  private long current = 0;
  private boolean append = false;

  /**
   * Obtains new RangeFileAsyncHttpResponseHandler and stores response in passed file
   * 
   * @param file File to store response within, must not be null
   */
  public RangeFileAsyncHttpResponseHandler(File file) {
    super(file);
  }

  @Override
  public void sendResponseMessage(HttpResponse response) throws IOException {
    if (!Thread.currentThread().isInterrupted()) {
      StatusLine status = response.getStatusLine();
      if (status.getStatusCode() == HttpStatus.SC_REQUESTED_RANGE_NOT_SATISFIABLE){
        //already finished
        if (!Thread.currentThread().isInterrupted())
          sendSuccessMessage(status.getStatusCode(), response.getAllHeaders(), null);
      }
      else if (status.getStatusCode() >= 300) {
        if (!Thread.currentThread().isInterrupted())
          sendFailureMessage(status.getStatusCode(), response.getAllHeaders(), null, new HttpResponseException(status.getStatusCode(), status.getReasonPhrase()));
      }
      else {
        if (!Thread.currentThread().isInterrupted()) {
          Header header = response.getFirstHeader("Content-Range");
          if (header == null) {
            append = false;
            current = 0;
          }
          else
            Log.v(LOG_TAG, "Content-Rnage: " + header.getValue());
          sendSuccessMessage(status.getStatusCode(), response.getAllHeaders(), getResponseData(response.getEntity()));
        }
      }
    }
  }

  @Override
  protected byte[] getResponseData(HttpEntity entity) throws IOException {
    if (entity != null) {
      InputStream instream = entity.getContent();
      long contentLength = entity.getContentLength() + current;
      FileOutputStream buffer = new FileOutputStream(getTargetFile(), append);
      if (instream != null) {
        try {
          byte[] tmp = new byte[BUFFER_SIZE];
          int l;
          while (current < contentLength && (l = instream.read(tmp)) != -1 && !Thread.currentThread().isInterrupted())
          {
            current += l;
            buffer.write(tmp, 0, l);
            sendProgressMessage((int)current, (int)contentLength);
          }
        } finally {
          instream.close();
          buffer.flush();
          buffer.close();
        }
      }
    }
    return null;
  }

  public void updateRequestHeaders(HttpUriRequest uriRequest) {
    if (mFile.exists() && mFile.canWrite())
      current = mFile.length();
    if (current > 0) {
      append = true;
      uriRequest.setHeader("Range", "bytes=" + current + "-");
    }
  }
}

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