This example illustrates how to sign request URL’s using .NET C#. In Java, you will need to download the following JAR to be able to execute the function.

• commons-codec-1.3.jar

Variables

Please note that your query must be encoded if you use characters with accents. In Java you can use URLEncoder in java.net.URLEncoder.

Sample Class

		import java.security.DigestException;
		import java.security.MessageDigest;

		import org.apache.commons.codec.binary.Base64;

		/**
		*  Function ySignUrl(String urlDomain, String urlPath, String partner, String key)
		*  Generates signed url from static url domain, url path, partner id and key
		* @param urlDomain
		* @param urlPath
		* @param partner
		* @param key
		* @param URL_sig
		* @param URL_ts
		* @param URL_partner
		* @return
		* @throws Exception
		*/
		public static String ySignUrl(String urlDomain, String urlPath, String partner,String key) throws Exception{

			String URL_sig = "hash";
			String URL_ts = "timestamp";
			String URL_partner = "aid";

			String URLreturn = null;
			// get the timestamp
			long time = System.currentTimeMillis() / 1000;
			// format URL
			String URLtmp = urlPath + "&" + URL_ts + "=" + time + "&"
					+ URL_partner + "=" + partner;

			String tokken = null;
			MessageDigest md = MessageDigest.getInstance("MD5");
			try {
				MessageDigest tc1 = (MessageDigest) md.clone();
				String s = URLtmp + key;

				byte[] toChapter1Digest = tc1.digest(s.getBytes("ISO-8859-1"));

				byte[] b = Base64.encodeBase64(toChapter1Digest);
				tokken = new String(b, "ISO-8859-1");
				tokken = tokken.replace('+', '.').replace('/', '_').replace('=', '-');
			} catch (CloneNotSupportedException cnse) {
				throw new DigestException(
						"couldn't make digest of partial content");
			}

			// format the concatained final URL
			URLreturn = urlDomain + URLtmp + "&" + URL_sig + "=" + tokken;

			return URLreturn;
		}

Simply call the function to generate the appropriate URL:

		import UrlSigner;

		query = UrlSigner.ySignUrl("http://uk.shopping.yahooapis.com",
				"/V2/search?query=ipod",
				"123",
				"PartnerKey");
		System.out.println("Generated search query [" + query + "]");