juneau-examples/juneau-examples-rest/src/main/java/org/apache/juneau/examples/rest/TumblrParserResource.java

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package org.apache.juneau.examples.rest;

import static org.apache.juneau.http.HttpMethodName.*;

import org.apache.juneau.*;
import org.apache.juneau.dto.*;
import org.apache.juneau.dto.html5.*;
import org.apache.juneau.rest.*;
import org.apache.juneau.rest.annotation.*;
import org.apache.juneau.rest.client.*;

@RestResource(
	path="/tumblrParser",
	messages="nls/TumblrParserResource",
	title="Tumblr parser service",
	description="Specify a URL to a Tumblr blog and parse the results.",
	htmldoc=@HtmlDoc(
		navlinks={
			"up: request:/..",
			"options: servlet:/?method=OPTIONS",
			"source: $C{Source/gitHub}/org/apache/juneau/examples/rest/$R{servletClassSimple}.java"
		},
		aside={
			"<div style='min-width:200px' class='text'>",
			"	<p>An example of a REST interface that retrieves data from another REST interface.</p>",
			"	<p><a class='link' href='$U{servlet:/ibmblr}'>try me</a></p>",
			"</div>"
		}
	)
)
public class TumblrParserResource extends BasicRestServlet {
	private static final long serialVersionUID = 1L;

	private static final int MAX_POSTS = 100;

	@RestMethod(name=GET, path="/", summary="Get the instructions page")
	public String getInstructions() throws Exception {
		return "Append the Tumblr blog name to the URL above (e.g. /tumblrParser/mytumblrblog)";
	}

	@RestMethod(name=GET, path="/{blogName}", summary="Parse the specified blog")
	public ObjectList parseBlog(@Path String blogName) throws Exception {
		ObjectList l = new ObjectList();
		try (RestClient rc = RestClient.create().build()) {
			String site = "http://" + blogName + ".tumblr.com/api/read/json";
			ObjectMap m = rc.doGet(site).getResponse(ObjectMap.class);
			int postsTotal = Math.min(m.getInt("posts-total"), MAX_POSTS);
			for (int i = 0; i < postsTotal; i += 20) {
				m = rc.doGet(site + "?start=" + i + "&num=20&filter=text").getResponse(ObjectMap.class);
				ObjectList ol = m.getObjectList("posts");
				for (int j = 0; j < ol.size(); j++) {
					ObjectMap om = ol.getObjectMap(j);
					String type = om.getString("type");
					Entry e = new Entry();
					e.date = om.getString("date");
					if (type.equals("link"))
						e.entry = new LinkString(om.getString("link-text"), om.getString("link-url"));
					else if (type.equals("audio"))
						e.entry = new ObjectMap().append("type","audio").append("audio-caption", om.getString("audio-caption"));
					else if (type.equals("video"))
						e.entry = new ObjectMap().append("type","video").append("video-caption", om.getString("video-caption"));
					else if (type.equals("quote"))
						e.entry = new ObjectMap().append("type","quote").append("quote-source", om.getString("quote-source")).append("quote-text", om.getString("quote-text"));
					else if (type.equals("regular"))
						e.entry = om.getString("regular-body");
					else if (type.equals("photo"))
						e.entry = new Img().src(om.getString("photo-url-250"));
					else
						e.entry = new ObjectMap().append("type", type);
					l.add(e);
				}
			}
		}
		return l;
	}

	public static class Entry {
		public String date;
		public Object entry;
	}
}