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Google APIs Client Library for Java Now with OAuth 2.0 and Google HTTP Client Library for Java Beta Released

Google Code blog Version 1.5 release of Java client library released today now come with the open source Google OAuth Client Library for Java in Beta, with support for both OAuth 1.0a and OAuth 2.0, announced Google Code blog.

“OAuth is an open standard for allowing a client application to securely gain access to a user’s private data stored on Google without ever asking for their password.”

“Most Google APIs support OAuth 2.0, and we want to encourage adoption of OAuth 2.0 more widely on the web. That’s why we built this library to work with any API on the web — not just Google APIs — that comply with the OAuth specifications,” informed Yaniv Inbar, Google APIs Client Team.

Finally, the team also made available a Beta version of the open source Google HTTP Client Library for Java.

“This is the common HTTP client library that the above two libraries are built on, and is built to work with any API on the web.

It features a pluggable HTTP transport abstraction that allows it to work seamlessly on any of the supported Java platforms, support for efficient JSON and XML data models for parsing and serialization, and a pluggable JSON and XML parser so you can use whatever works best for you,” Yaniv stated.

Here is an example of how easy it is to use the OAuth 2.0 library to make a request using the library for the Google+ API (more samples):

// Set up the HTTP transport and JSON factory
HttpTransport httpTransport = new NetHttpTransport();
JsonFactory jsonFactory = new JacksonFactory();

// Set up OAuth 2.0 access of protected resources 
// using the refresh and access tokens, automatically 
// refreshing the access token when it expires
GoogleAccessProtectedResource requestInitializer = 
    new GoogleAccessProtectedResource(accessToken, httpTransport, 
    jsonFactory, clientId, clientSecret, refreshToken);

// Set up the main Google+ class
Plus plus = new Plus(httpTransport, requestInitializer, jsonFactory);

// Make a request to access your profile and display it to console
Person profile = plus.people().get("me").execute();
System.out.println("ID: " + profile.getId());
System.out.println("Name: " + profile.getDisplayName());
System.out.println("Image URL: " + profile.getImage().getUrl());
System.out.println("Profile URL: " + profile.getUrl());

You can try Google HTTP Client Library for Java here, and Google OAuth Client Library for Java beta here.

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