ElephantPost.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.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import org.turro.string.Strings;
import org.apache.hc.client5.http.classic.methods.HttpPost;
import org.apache.hc.client5.http.entity.UrlEncodedFormEntity;
import org.apache.hc.client5.http.impl.classic.CloseableHttpClient;
import org.apache.hc.client5.http.impl.classic.CloseableHttpResponse;
import org.apache.hc.client5.http.impl.classic.HttpClients;
import org.apache.hc.core5.http.HttpEntity;
import org.apache.hc.core5.http.NameValuePair;
import org.apache.hc.core5.http.message.BasicNameValuePair;
import org.turro.action.Secrets;
 
public class ElephantPost {
 
  private final String serverUrl;
  private final HashMap<String, String> parameters;
 
  public ElephantPost(String serverUrl) {
    this.serverUrl = serverUrl;
    parameters = new HashMap<>();
  }
 
  public void addParameter(String name, String value) {
    parameters.put(name, value);
  }
  
  public ElephantResponse doPost() throws IOException {
    if(serverUrl == null || parameters.isEmpty()) {
      return null;
    }
    List<NameValuePair> nvps = new ArrayList<>();
    for(String key : parameters.keySet()) {
      String value = parameters.get(key);
      if(!Strings.isBlank(value)) {
        nvps.add(new BasicNameValuePair(key, value));
      }
    }
    nvps.add(new BasicNameValuePair("skey", Secrets.getSecret("key=post")));
    HttpPost httpPost = new HttpPost(serverUrl);
    httpPost.setEntity(new UrlEncodedFormEntity(nvps));
    try (CloseableHttpClient closeableClient = (CloseableHttpClient) HttpClients.createDefault()) {
      try (CloseableHttpResponse closeableResponse = (CloseableHttpResponse) closeableClient.execute(httpPost)) {
        HttpEntity resEntity = closeableResponse.getEntity();
        return ElephantResponse.getResponse(resEntity);
      }
    }
  }
  
  public static boolean isValid(HttpServletRequest request) {
    return Secrets.getSecret("key=post").equals(request.getParameter("skey"));
  }
  
}