get url returned by search

[avizana]

I'm sending a query for Wikipedia site as below:

Java - Wikipedia, the free encyclopedia

The webpage that I'm getting is: Java - Wikipedia, the free encyclopedia

How can I get the URL that the webpage is returning?

URL u = new URL("http://en.wikipedia.org/wiki/?search=Java");

[rp181]

Just found this: API:Main page - MediaWiki

It is the mediawiki API (Wikipedia is a part of it). Chances are, part of the API is a search function. EDIT: This is what I found. Use this:

http://en.wikipedia.org/w/api.php?action=opensearch&search=Java

This returns possible pages. Pick the correct one, replace spaces with underscores, and go to the wikipedia page.

EDIT EDIT: Here is a working method and example. It takes the query, and which result number to return (starting from 1, 0 will just give you your query). If it is out of bounds, it return an empty string.

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package urltest;

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URL;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 *
 * @author phani
 */
public class Main {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        try {
            String query = "Java";

            System.out.println(searchWikipediaURL(query,1));
        } catch (Exception ex) {
            Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
        }

    }

    public static String searchWikipediaURL(String query, int result) throws Exception {
        try{
        URL url = new URL("http://en.wikipedia.org/w/api.php?action=opensearch&search=" + query);
        InputStream is = url.openStream();
        BufferedReader br = new BufferedReader(new InputStreamReader(is));
        String results = br.readLine();
        return("http://en.wikipedia.org/wiki/"+results.substring(nthOccurrence(results, '"', result*2)+1, nthOccurrence(results, '"', (result*2)+1)));
        }
        catch(Exception e){
            return "";
        }
    }

    public static int nthOccurrence(String str, char c, int n) {
        int pos = str.indexOf(c, 0);
        while (n-- > 0 && pos != -1) {
            pos = str.indexOf(c, pos + 1);
        }
        return pos;
    }
}

EDITx3: Not sure if u need to replace the spaces. It works w/ spaces in a browser, not sure about Java.

[avizana]

Thanks for your details answer. It really helped.