URLUtil.java

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/*
 * Turró i Cutiller Foundation. License notice.
 * Copyright (C) 2015 Lluis Turró Cutiller <http://www.turro.org/>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
package org.turro.http;
 
import java.net.MalformedURLException;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.turro.string.Strings;
import org.apache.hc.core5.net.URIBuilder;
import org.turro.elephant.context.ElephantContext;
 
public class URLUtil {
 
  public static String checkAppServer(String server, boolean secured) {
    try {
      URIBuilder url = new URIBuilder(server);
      if(url.getScheme() == null) {
        if(secured) url.setScheme("https"); else url.setScheme("http");
      }
      if(url.getHost() == null) {
        String[] path = splitPath(url.getPath());
        url.setHost(path[0]);
        if(path.length > 1) {
          url.setPath("/" + path[1]);
        } else {
          url.setPath(null);
        }
      } else {
        String[] path = splitPath(url.getPath());
        if(path != null && path.length > 0) {
          url.setPath("/" + path[0]);
        } else {
          url.setPath(null);
        }
      }
      url.removeQuery();
      return url.build().toString();
    } catch (URISyntaxException ex) {
      Logger.getLogger(URLUtil.class.getName()).log(Level.SEVERE, ElephantContext.logMsg(null), ex);
      return null;
    }
  }
  
  public static String[] splitPath(String path) {
    if(!Strings.isBlank(path)) {
      path = path.replaceFirst("^[\\/ ]+", "");
      path = path.replaceFirst("[\\/ ]+$", "");
      return path.split("\\/");
    } else {
      return null;
    }    
  }
 
  public static String absolute(String appServer, String path) throws URISyntaxException, MalformedURLException {
    URI url = new URI(path);
    if(url.isAbsolute()) {
      return path;
    } else {
      return new URL(new URL(appServer), path).toString();
    }
  }
  
}