Quick and Easy Integration of Google URL Shortener API in your Java Applications using Scribe-Java and GSon

This post is about a quick and easy integration of Google’s URL Shortener Service/API in your Java Applications using popular APIs like Scribe-Java and Google’s GSon.

The good part about this integration is that you don’t need to do additional steps to register your application with the Service APIs, because in this case, the Google’s URL Shortener Service can be accessed “anonymously”, with out having the need to register the application and performing the authentication and authorization steps.

First Download:

• Scribe-Java – A Java OAuth Library
• Google GSon – A JSON serialization/deserialization library in Java

Create a new project in IDE of your choice and add above downloaded JAR files to your project’s build/class path.

GoogleUrlShortenerApiIntegrationUsingScribeExample.java:

	/**
	* Quick and Easy Integration of Google URL Shortener API in your Java Applications using Scribe-Java and GSon
	* http://codeoftheday.blogspot.com/2013/07/quick-and-easy-integration-of-google.html
	*/
	package smhumayun.codeoftheday.google.urlshortener;
	import com.google.gson.GsonBuilder;
	import com.google.gson.reflect.TypeToken;
	import org.scribe.builder.ServiceBuilder;
	import org.scribe.builder.api.GoogleApi;
	import org.scribe.model.OAuthRequest;
	import org.scribe.model.Response;
	import org.scribe.model.Verb;
	import org.scribe.oauth.OAuthService;
	import java.lang.reflect.Type;
	import java.util.Map;
	/**
	* This class demonstrate quick and Easy Integration of Google URL Shortener API in your Java Applications
	* using Scribe-Java and GSon APIs
	*
	* User: smhumayun
	* Date: 7/23/13
	* Time: 5:27 PM
	*/
	public class GoogleUrlShortenerApiIntegrationUsingScribeAndGsonExample {
	/**
	* Main Method
	*
	* @param args arguments
	*/
	public static void main(String[] args) {
	//Instantiating the oAuth Service of Scribe-Java API
	OAuthService oAuthService = new ServiceBuilder()
	//Google Api Provider - Google's URL Shortener API is part of Google Platform APIs
	.provider(GoogleApi.class)
	/*
	Using "anonymous" as API Key & Secret because Google's URL Shortener service
	does not necessarily requires App identification and/or User Information Access
	*/
	.apiKey("anonymous")
	.apiSecret("anonymous")
	//OAuth 2.0 scope for the Google URL Shortener API
	.scope("https://www.googleapis.com/auth/urlshortener")
	//build it!
	.build();
	//Instantiating oAuth Request of type POST and with Google URL Shortener API End Point URL
	OAuthRequest oAuthRequest = new OAuthRequest(Verb.POST, "https://www.googleapis.com/urlshortener/v1/url");
	//set the content type header to application/json - this is the type of content you are sending as payload
	oAuthRequest.addHeader("Content-Type", "application/json");
	//Preparing JSON payload to send url to Google URL Shortener
	String json = "{\"longUrl\": \"http://h1b-work-visa-usa.blogspot.com/\"}";
	//add xml payload to request
	oAuthRequest.addPayload(json);
	//send the request
	Response response = oAuthRequest.send();
	//print the response from server
	System.out.println("response.getBody() = " + response.getBody());
	//determining the generic type of map
	Type typeOfMap = new TypeToken<Map<String, String>>() {}.getType();
	//desrialize json to map
	Map<String, String> responseMap = new GsonBuilder().create().fromJson(response.getBody(), typeOfMap);
	//print id which is actually the shortened url
	System.out.println("Shortened URL = " + responseMap.get("id"));
	}
	}

view raw Google_Url_Shortener_Api_Integration_Using_Scribe_And_Gson_Example.java hosted with ❤ by GitHub

Compile and Run the project. You will notice an output similar to the one below in your IDE’s console:

	# Quick and Easy Integration of Google URL Shortener API in your Java Applications using Scribe-Java and GSon
	# http://codeoftheday.blogspot.com/2013/07/quick-and-easy-integration-of-google.html
	response.getBody() = {
	"kind": "urlshortener#url",
	"id": "http://goo.gl/ePeF0j",
	"longUrl": "http://h1b-work-visa-usa.blogspot.com/"
	}
	Shortened URL = http://goo.gl/ePeF0j

view raw Google_Url_Shortener_Api_Integration_Using_Scribe_And_Gson_Example_Output.txt hosted with ❤ by GitHub

Copy the Shortened URL, open a browser of your choice and paste the Shortened URL into the browser’s Address Bar and press ENTER. You will notice how Google’s URL Shortener Service resolves your Shortened URL to your original (longer) URL.

Shortened URL:

Original Longer URL resolved by Goo.gl:

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