New to FB dev, trying to get access token via Java (server-side flow) in local Eclipse/Tomcat environment

Question

Developing locally with a tomcat server under eclipse. Goal is to use RestFB API kit to access user info on server side using Java. I've done a LOT of research across the web but I am stumped.

My app is set up with Site URL: http://localhost:8080/

Initial URL for user is:

www.facebook.com/dialog/oauth?client_id=155730431154731&redirect_uri=http%3A%2F%2Flocalhost%3A8080%2FSircolBase%2Ffboauth%2F&scope=user_about_me,friends_about_me,offline_access

The user hits this URL and accepts the app. FB responds to my redirect URL which is a servlet via the following URL:

localhost:8080/SircolBase/fboauth/?code=Mf_kXCH3Lo5cGeBuWw_R1x_1b1EJmvoXJpieDqsOk2k.eyJpdiI6IkJvdHRIMmJJZUR0cXNIdFZCX1E5d0EifQ.bjPZvcmNVLhk4KcfRwJwWSYKv6GVOe9TbveHRRIEoQ3BwXneDAfTKyzY4jw2k8BdSOc19QjSNJ8PrEEyQ0Uuomh3f4Nn_GEk95wGGJcI6sLnFDIXyC0_n7IbeJeRtazN

I parse the code in the servlet and then build the oAuth GET request, which is:

graph.facebook.com/oauth/access_token?client_id=155730431154731&redirect_uri=http%3A%2F%2Flocalhost%3A8080%2FSircolBase%2Ffboauth%2F&client_secret=xxxxxxd39227e77de9d8ef682abf299c&code=Mf_kXCH3Lo5cGeBuWw_R1x_1b1EJmvoXJpieDqsOk2k.eyJpdiI6IkJvdHRIMmJJZUR0cXNIdFZCX1E5d0EifQ.bjPZvcmNVLhk4KcfRwJwWSYKv6GVOe9TbveHRRIEoQ3BwXneDAfTKyzY4jw2k8BdSOc19QjSNJ8PrEEyQ0Uuomh3f4Nn_GEk95wGGJcI6sLnFDIXyC0_n7IbeJeRtazN

I execute the GET in Java and the response comes back as:

access_token=155730431154731|15d3fb5635abf840d87f7f75.1-570520241|kuj1yskauro43dmqspwh-rqktwa

I take the access token and try to do 2 calls, from the servlet on my local server immediately in java:

graph.facebook.com/me?access_token=155730431154731%7C15d3fb5635abf840d87f7f75.1-570520241%7Ckuj1yskauro43dmqspwh-rqktwa&format=json

graph.facebook.com/JonesJerryK?access_token=155730431154731%7C15d3fb5635abf840d87f7f75.1-570520241%7Ckuj1yskauro43dmqspwh-rqktwa

Both return with:

{"error":{"type":"OAuthException","message":"Invalid access token signature."}}

What am I doing wrong? Note that both redirect URL references along this sequence are encoded and identical. Does the access_token above look like it is in the correct format? Some have suggested that it is not. Note that I am requesting 'offline_access' in this app.

Thanks for any tips.

Answer 1

This seems way too complicated. You can use RestFB , or the Facebook Java API which have already encapsulated all the technical details for doing this.