public static void main(String[] args) throws Exception {
URL url = new URL("http://feeds.reuters.com/reuters/businessNews");
XmlReader reader = null;
try {
reader = new XmlReader(url);
SyndFeed feed = new SyndFeedInput().build(reader);
System.out.println("Feed Title: " + feed.getAuthor());
for (@SuppressWarnings("unchecked") Iterator<SyndEntry> i = feed.getEntries().iterator();
i.hasNext(); ) {
SyndEntry entry = i.next();
System.out.println(entry.getTitle());
}
} finally {
if (reader != null) reader.close();
}
}
/**
* Generate an ebook from an RSS DOM Document.
*
* @param url The URL from where the Document was fetched (used only to set the author metadata)
* @param doc The DOM Document of the feed.
* @return An ebook.
* @throws IllegalArgumentException
* @throws FeedException
* @throws IOException
*/
private static Book createBookFromFeed(URL url, Document doc, List<Keyword> keywords)
throws IllegalArgumentException, FeedException, IOException {
Book book = new Book();
// start parsing our feed and have the above onItem methods called
SyndFeedInput input = new SyndFeedInput();
SyndFeed feed = input.build(doc);
System.out.println(feed);
// Set the title
book.getMetadata().addTitle(feed.getTitle());
// Add an Author
String author = feed.getAuthor();
if (author == null || "".equals(author.trim())) {
author = url.getHost();
}
book.getMetadata().addAuthor(new Author(author));
if (feed.getPublishedDate() != null) {
book.getMetadata().addDate(new nl.siegmann.epublib.domain.Date(feed.getPublishedDate()));
}
if (feed.getDescription() != null) {
book.getMetadata().addDescription(feed.getDescription());
}
if (feed.getCopyright() != null) {
book.getMetadata().getRights().add(feed.getCopyright());
}
// Set cover image - This has never worked.
// if (feed.getImage() != null) {
// System.out.println("There is an image for the feed");
// Promise<HttpResponse> futureImgResponse =
// WS.url(feed.getImage().getUrl()).getAsync();
// HttpResponse imgResponse = await(futureImgResponse);
// System.out.println("Content-type: " + imgResponse.getContentType());
// if (imgResponse.getContentType().startsWith("image/")) {
// String extension =
// imgResponse.getContentType().substring("image/".length());
// InputStream imageStream = imgResponse.getStream();
// book.getMetadata().setCoverImage(new Resource(imageStream, "cover." +
// extension));
// System.out.println("Using default cover");
// imageStream =
// VirtualFile.fromRelativePath("assets/cover.png").inputstream();
// if (imageStream != null) {
// System.out.println("Using default cover");
// book.getMetadata().setCoverImage(new Resource(imageStream,
// "cover.png"));
// } else {
// System.out.println("Could not load default cover");
// }
// }
// }
int entryNumber = 0;
List<SyndEntry> entries = feed.getEntries();
for (SyndEntry entry : entries) {
if (matchesKeyword(entry, keywords)) {
StringBuilder title = new StringBuilder(100);
if (entry.getTitle() != null) {
title.append(entry.getTitle());
}
if (entry.getAuthor() != null) {
title.append(" - ").append(entry.getAuthor());
}
StringBuilder content = new StringBuilder();
// Add title inside text
content.append("<h2>").append(title).append("</h2>");
if (entry.getDescription() != null) {
SyndContent syndContent = (SyndContent) entry.getDescription();
if (!syndContent.getType().contains("html")) {
content.append("<pre>\n");
}
content.append(syndContent.getValue());
if (!syndContent.getType().contains("html")) {
content.append("\n</pre>");
}
content.append("<hr/>");
}
if (entry.getContents().size() > 0) {
SyndContent syndContent = (SyndContent) entry.getContents().get(0);
if (!syndContent.getType().contains("html")) {
content.append("<pre>\n");
}
content.append(syndContent.getValue());
if (!syndContent.getType().contains("html")) {
content.append("\n</pre>");
}
}
String strContent = clean(content.toString());
// Add Chapter
try {
entryNumber++;
book.addSection(
title.toString(),
new Resource(new StringReader(strContent), "entry" + entryNumber + ".xhtml"));
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
return book;
}
/** @inheritDoc */
public Subscription fetchSubscription(String feedURL, Date lastModified) throws FetcherException {
if (feedURL == null) {
throw new IllegalArgumentException("feed url cannot be null");
}
// setup Rome feed fetcher
FeedFetcher feedFetcher = getRomeFetcher();
// fetch the feed
log.debug("Fetching feed: " + feedURL);
SyndFeed feed;
try {
feed = feedFetcher.retrieveFeed(new URL(feedURL));
} catch (Exception ex) {
throw new FetcherException("Error fetching subscription - " + feedURL, ex);
}
log.debug("Feed pulled, extracting data into Subscription");
// build planet subscription from fetched feed
Subscription newSub = new Subscription();
newSub.setFeedURL(feedURL);
newSub.setSiteURL(feed.getLink());
newSub.setTitle(feed.getTitle());
newSub.setAuthor(feed.getAuthor());
newSub.setLastUpdated(feed.getPublishedDate());
// normalize any data that couldn't be properly extracted
if (newSub.getSiteURL() == null) {
// set the site url to the feed url then
newSub.setSiteURL(newSub.getFeedURL());
}
if (newSub.getAuthor() == null) {
// set the author to the title
newSub.setAuthor(newSub.getTitle());
}
if (newSub.getLastUpdated() == null) {
// no update time specified in feed, so try consulting feed info cache
FeedFetcherCache feedCache = getRomeFetcherCache();
try {
SyndFeedInfo feedInfo = feedCache.getFeedInfo(new URL(newSub.getFeedURL()));
if (feedInfo.getLastModified() != null) {
long lastUpdatedLong = ((Long) feedInfo.getLastModified()).longValue();
if (lastUpdatedLong != 0) {
newSub.setLastUpdated(new Date(lastUpdatedLong));
}
}
} catch (MalformedURLException ex) {
// should never happen since we check this above
}
}
// check if feed is unchanged and bail now if so
if (lastModified != null
&& newSub.getLastUpdated() != null
&& !newSub.getLastUpdated().after(lastModified)) {
return null;
}
if (log.isDebugEnabled()) {
log.debug("Subscription is: " + newSub.toString());
}
// some kludge to deal with feeds w/ no entry dates
// we assign arbitrary dates chronologically by entry starting either
// from the current time or the last update time of the subscription
Calendar cal = Calendar.getInstance();
if (newSub.getLastUpdated() != null) {
cal.setTime(newSub.getLastUpdated());
} else {
cal.setTime(new Date());
cal.add(Calendar.DATE, -1);
}
// add entries
List<SyndEntry> feedEntries = feed.getEntries();
for (SyndEntry feedEntry : feedEntries) {
SubscriptionEntry newEntry = buildEntry(feedEntry);
// some kludge to handle feeds with no entry dates
if (newEntry.getPubTime() == null) {
log.debug("No published date, assigning fake date for " + feedURL);
newEntry.setPubTime(new Timestamp(cal.getTimeInMillis()));
cal.add(Calendar.DATE, -1);
}
if (newEntry != null) {
newSub.addEntry(newEntry);
}
}
log.debug(feedEntries.size() + " entries included");
return newSub;
}
