The OAuth2 class contains information required for authorization on a server. Create signature for authorization request

An internal AccessTokenRequest class is used to get AccessToken instance via AccessTokenRequest.getAccessToken().

The following code illustrates typical scheme of using oAuth2 :

Scheme Authorization Code Grant:

       // To initialize oAuth it is necessary to provide authorization server  Endpoints and  client credentials
       OAuth2 oauth2 = new OAuth2( authorizationEndpoint, tokenEndpoint, client_id ); // creating an OAuth2 object
               
       // Create Authorization Request
       Request r = GTAuthorizationCode.createAuthorizationRequest(oauth2, "http:://oracle.exampleoauth2.com", "", "xyz");
       // ...
       // Modify Request according to server specifications
       // ...               
       try {
           //  Get Authorization Request
           IResponse response = r.execute();
           if (response.resultCode() == HttpConnection.HTTP_MOVED_TEMP) {
               //  Get Authorization Response
               String link = response.getField( "Location" );
               // ...
               // At this point you have to direct a user to the provided link.
               // The user have to log on to the server and grant access to his/her data.
               // In this case the server answers with URI composed from the redirect_uri parameter, and some 'code' value.
               // ...
           }
           String authorizationCode = ...; // the 'code' value from the above server's response
           String redirect_uri = ...; // set redirect uri
           AccessTokenRequest atr = GTAuthorizationCode.createAccessTokenRequest( oauth2, authorizationCode, redirect_uri );
           // here you may modify the request according to your scenario and authorization server configuration
           try {
               //  AccessToken Request 
               AccessToken at = atr.getAccessToken();
               oauth2.setToken( at );
               // Now it is possible to use oauth2 for sign Requests;
           }
           catch (OAuth2Exception oae) {
               //  Error Response 
           }
       }
       catch (IOException ex) {            
       }
        
       Request request;// 
       // get Signature for particular request
       String sign = oauth2.getAuthorizationSign(request);
       // sign particular request
       request.addParameter(oauth2.getPropertyName(), sign);
 

Scheme Implicit Grant:

       // Create Authorization Request
       Request r = GTImplicit.createAuthorizationRequest(oauth2, "http:://oracle.exampleoauth2.com", "", "xyz");
       // ...
       // Modify Request according to server specifications
       // ...               
       try {
           //  Get Authorization Request
           IResponse response = r.execute();
           if (response.resultCode() == HttpConnection.HTTP_MOVED_TEMP) {
               //  Get Authorization Response
               AccessToken at = GTImplicit.getAccessToken(response);
               oauth2.setToken( at );
               // Now it is possible to use oauth2 for sign Requests;
           }
       }
       catch (IOException ex) {
       }
 

Scheme Resource Owner Password Credentials Grant:

       // Create Authorization Request
       AccessTokenRequest atr = GTResourceOwnerPasswordCredentials.createAccessTokenRequest(oauth2, "oracle", "password", "");
       // here you may modify the request according to your scenario
           try {
               //  AccessToken Request 
               AccessToken at = atr.getAccessToken();
               oauth2.setToken( at );
               // Now it is possible to use oauth2 for sign Requests;
           }catch (OAuth2Exception oae) {
               //  Error Response 
           } catch (IOException ex) {                
           }
 

Scheme Client Credentials Grant:

       // Create Authorization Request
       AccessTokenRequest atr = GTClientCredentials.createAccessTokenRequest(oauth2, "");
       // here you may modify the request according to your scenario
           try {
               //  AccessToken Request 
               AccessToken at = atr.getAccessToken();
               oauth2.setToken( at );
               // Now it is possible to use oauth2 for sign Requests;
           }catch (OAuth2Exception oae) {
               //  Error Response 
           } catch (IOException ex) {                
           }