IdentityHttpReader.java

/*
 * GovWay - A customizable API Gateway 
 * https://govway.org
 * 
 * Copyright (c) 2005-2025 Link.it srl (https://link.it).
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 3, as published by
 * the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
package org.openspcoop2.utils.transport.http.credential;

import java.util.Properties;

import javax.servlet.http.HttpServletRequest;

import org.openspcoop2.utils.transport.http.HttpServletCredential;
import org.slf4j.Logger;

/**
 * Implementazione dell'interfaccia {@link IPrincipalReader} che utilizza la classe {@link HttpServletCredential} come strumento per leggere un header http dalla request.
 * 
 * @author Pintori Giuliano (pintori@link.it)
 * @author $Author$
 * @version $Rev$, $Date$
 */
public class IdentityHttpReader implements IPrincipalReader{


    private Logger log = null;

    /**
     * 
     */
    private static final long serialVersionUID = 1L;

    public static final String HEADER_NAME = "header";
    private String headerName = "GovWay-Console-Principal"; // default
    
    public IdentityHttpReader(Logger log){
        this.log = log;
        this.log.debug("IdentityHttpReader inizializzato.");
    }

    @Override
    public void init(Object... parametri) throws PrincipalReaderException {
        if(parametri!=null && parametri.length>0) {
            Object pObject = parametri[0];
            if(pObject instanceof Properties) {
                Properties prop = (Properties) pObject;
                String v = prop.getProperty(HEADER_NAME);
                if(v!=null && !"".equals(v.trim())) {
                    this.headerName = v;
                }
            }
        }
    }

    @Override
    public String getPrincipal(HttpServletRequest request) throws PrincipalReaderException {
        this.log.debug("Estrazione principal in corso...");

        try{
            String username = request.getHeader(this.headerName);

            this.log.debug("Username trovato nell'header ["+this.headerName+"]: ["+username+"]");
            
            return username;
        }catch (Exception e) {
            this.log.error("Errore durante la lettura del principal: "+ e.getMessage(),e);
            throw new PrincipalReaderException(e);
        }
    }
}