org.rootservices.otter.authentication.ParseBearer Maven / Gradle / Ivy

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package org.rootservices.otter.authentication;

import org.rootservices.otter.authentication.exception.BearerException;

/**
 * Created by tommackenzie on 12/13/16.
 */
public class ParseBearer {
    private static String HEADER_EMPTY = "header is null or empty";
    private static String BEARER = "Bearer ";
    private static String NOT_BEARER = "header is not Bearer authentication scheme";

    public String parse(String header) throws BearerException {
        if (header == null || header.isEmpty()) {
            throw new BearerException(HEADER_EMPTY);
        }

        String[] credentials = header.split(BEARER);

        if ( credentials.length != 2  || credentials[1].isEmpty()) {
            throw new BearerException(NOT_BEARER);
        }

        return credentials[1];
    }
}