OAUTH 2 with google-oauth-java-client


This post is a quick reference for running the dailymotion-cmdline-sample, a Java console sample app for the google-oauth-java-client OAUTH 2 library.

The sample app performs authorization code grant specified in the OAUTH 2 RFC, and receives user’s authorization code via an embedded Jetty HTTP server. That code is then exchanged for an access token.

Clone the google-oauth-java-client repo at GitHub.

git clone git@github.com:google/google-oauth-java-client.git

Install Apache Maven if you don’t already have it. You’ll need Oracle’s JDK to use Maven and compile the sample app. On Mac OS X Maven can be installed using Homebrew.

brew install maven

Head into the cloned repo and compile.

cd google-oauth-java-client
mvn compile

Head into the sample app folder and execute the sample app.

cd samples/dailymotion-cmdline-sample
mvn -X exec:java -Dexec.mainClass="com.google.api.services.samples.dailymotion.cmdline.DailyMotionSample"

The first execution will fail. You’ll need to create a dailymotion.com developer account, which can be created at http://www.dailymotion.com/profile/developer. Create a new API key. The only value that really matters is the Callback URL which should be http://127.0.0.1:8080/Callback.

Enter your API credentials in rc/main/java/com/google/api/services/samples/dailymotion/cmdline/OAuth2ClientCredentials.java. Compile and exec again. The application should list your favorite videos if all goes well.

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