Beispiel #1
0
  // Get the syndicated feed using rome
  private SyndFeed getFeed(SourcePojo source, String url) {
    synchronized (
        FeedHarvester
            .class) { // (workaround for ROME concurrency issues:
                      // http://www.jdom.org/pipermail/jdom-interest/2008-December/016252.html)
      if (null == url) {
        url = source.getUrl();
      }
      for (int i = 0; i < 2; ++i) { // Will have 2 goes in case of failure
        // Check to see if the feed requires authentication
        if (source.getAuthentication() != null) // requires auth
        {
          try {
            FeedFetcher feedFetcher =
                new HttpClientFeedFetcher(null, authenticateFeed(source.getAuthentication()));
            if ((null != source.getRssConfig()) && (null != source.getRssConfig().getUserAgent())) {
              feedFetcher.setUserAgent(source.getRssConfig().getUserAgent());
            }
            return feedFetcher.retrieveFeed(new URL(url));
          } catch (Exception e) {
            if (1 == i) { // else just try again
              if (null == url) { // can only error on primary RSS, makes life simpler
                handleRssError(e, source);
              }
            }
          }
        } else // does not require auth
        {
          try {
            FeedFetcherCache feedInfoCache = HashMapFeedInfoCache.getInstance();
            FeedFetcher feedFetcher = new HttpURLFeedFetcher(feedInfoCache);
            if ((null != source.getRssConfig()) && (null != source.getRssConfig().getUserAgent())) {
              feedFetcher.setUserAgent(source.getRssConfig().getUserAgent());
            }
            return feedFetcher.retrieveFeed(new URL(this.cleanUrlStart(url)));
          } catch (Exception e) {
            if (1 == i) { // else just try again
              if (null == url) { // can only error on primary RSS, makes life simpler
                handleRssError(e, source);
              }
            }
          }
        }

        // If still here, must have errored so sleep before trying again
        try {
          Thread.sleep(10000);
        } catch (InterruptedException e) {
        }
      } // (end get 2 goes)
    }
    return null;
  }
Beispiel #2
0
  public static void main(String[] args) {
    boolean ok = false;
    if (args.length == 1) {
      try {
        URL feedUrl = new URL(args[0]);
        FeedFetcherCache feedInfoCache = HashMapFeedInfoCache.getInstance();
        FeedFetcher fetcher = new HttpURLFeedFetcher(feedInfoCache);

        FetcherEventListenerImpl listener = new FetcherEventListenerImpl();

        fetcher.addFetcherEventListener(listener);

        System.err.println("Retrieving feed " + feedUrl);
        // Retrieve the feed.
        // We will get a Feed Polled Event and then a
        // Feed Retrieved event (assuming the feed is valid)
        SyndFeed feed = fetcher.retrieveFeed(feedUrl);

        System.err.println(feedUrl + " retrieved");
        System.err.println(
            feedUrl
                + " has a title: "
                + feed.getTitle()
                + " and contains "
                + feed.getEntries().size()
                + " entries.");
        // We will now retrieve the feed again. If the feed is unmodified
        // and the server supports conditional gets, we will get a "Feed
        // Unchanged" event after the Feed Polled event
        System.err.println("Polling " + feedUrl + " again to test conditional get support.");
        SyndFeed feed2 = fetcher.retrieveFeed(feedUrl);
        System.err.println(
            "If a \"Feed Unchanged\" event fired then the server supports conditional gets.");

        ok = true;
      } catch (Exception ex) {
        System.out.println("ERROR: " + ex.getMessage());
        ex.printStackTrace();
      }
    }

    if (!ok) {
      System.out.println();
      System.out.println("FeedReader reads and prints any RSS/Atom feed type.");
      System.out.println("The first parameter must be the URL of the feed to read.");
      System.out.println();
    }
  }