org.roda.core.util.RESTClientUtility.java Source code

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Here is the source code for org.roda.core.util.RESTClientUtility.java

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/**
 * The contents of this file are subject to the license and copyright
 * detailed in the LICENSE file at the root of the source
 * tree and available online at
 *
 * https://github.com/keeps/roda
 */
package org.roda.core.util;

import java.io.IOException;
import java.io.Serializable;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.roda.core.data.exceptions.RODAException;
import org.roda.core.data.utils.JsonUtils;

/**
 * 20160824 hsilva: I think someone, outside RODA code base, is using this
 * method via maven dependency
 * 
 * @author Hlder Silva <hsilva@keep.pt>
 */
public final class RESTClientUtility {

    /** Private empty constructor */
    private RESTClientUtility() {
        // do nothing
    }

    public static <T extends Serializable> T sendPostRequest(T element, Class<T> elementClass, String url,
            String resource, String username, String password) throws RODAException {
        CloseableHttpClient httpClient = HttpClientBuilder.create().build();
        String basicAuthToken = new String(Base64.encode((username + ":" + password).getBytes()));
        HttpPost httpPost = new HttpPost(url + resource);
        httpPost.setHeader("Authorization", "Basic " + basicAuthToken);
        httpPost.addHeader("content-type", "application/json");
        httpPost.addHeader("Accept", "application/json");

        try {
            httpPost.setEntity(new StringEntity(JsonUtils.getJsonFromObject(element)));
            HttpResponse response;
            response = httpClient.execute(httpPost);
            HttpEntity responseEntity = response.getEntity();

            int responseStatusCode = response.getStatusLine().getStatusCode();
            if (responseStatusCode == 201) {
                return JsonUtils.getObjectFromJson(responseEntity.getContent(), elementClass);
            } else {
                throw new RODAException("POST request response status code: " + responseStatusCode);
            }
        } catch (IOException e) {
            throw new RODAException("Error sending POST request", e);
        }
    }

}