Generating the Hawk Authorization header using makeapi-client

hawkClientAuth.js

/* The protected paths can only be accessed by Clients running this code in a Node Environment
 * See line XX for the Hawk bits
 *
 * To set up the Make Client for hawk authorized requests, you would do this: 
 *
 * new Make({ 
 *   apiURL: "https://makeapi.webmaker.org,
 *   hawk: {
 *     key: "key",
 *     id: "ID",
 *     algorithm: "sha256"
 *   }
 * });
 *
 */ 
function nodeStrategy( type, path, data, callback ) {
    // Only use auth if provided
    var authObj = ( user && pass ) ? {
          username: user,
          password: pass,
          sendImmediately: true
        } : undefined,
        requestOptions = {
          method: type,
          uri: path,
          json: data,
          headers: {}
        },
        header;

    if ( authObj ) {
      requestOptions.auth = authObj;
    } else if( credentials ) {
      
      /*
       * If hawk credentials were provided, generate the Authorization header using Hawk
       */
      header = hawk.client.header( path, type, { credentials: credentials } );
      requestOptions.headers.Authorization = header.field;
    }

    request( requestOptions, function( err, res, body ) {
      
      // This is where the Client would verify the server's response to prevent server spoofing - It's a TO-DO right now :)
      if ( err ) {
        callback( err );
        return;
      }

      if ( res.statusCode === 200 ) {
        return callback( null, body );
      }

      // There was an error of some sort, and the body contains the reason why
      callback( body.reason );
    });
  }