com.diversityarrays.dalclient.httpimpl.DalHttpFactoryImpl.java Source code

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Here is the source code for com.diversityarrays.dalclient.httpimpl.DalHttpFactoryImpl.java

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/*
 * dalclient library - provides utilities to assist in using KDDart-DAL servers
 * Copyright (C) 2015,2016,2017 Diversity Arrays Technology
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU 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 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 com.diversityarrays.dalclient.httpimpl;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.List;

import javax.net.ssl.SSLContext;

import org.apache.commons.collections15.Factory;
import org.apache.http.HttpEntity;
import org.apache.http.NameValuePair;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.mime.MultipartEntityBuilder;
import org.apache.http.entity.mime.content.FileBody;
import org.apache.http.entity.mime.content.InputStreamBody;
import org.apache.http.impl.client.BasicResponseHandler;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;

import com.diversityarrays.dalclient.DalUtil;
import com.diversityarrays.dalclient.HttpResponseInfo;
import com.diversityarrays.dalclient.http.DalCloseableHttpClient;
import com.diversityarrays.dalclient.http.DalCloseableHttpResponse;
import com.diversityarrays.dalclient.http.DalHttpFactory;
import com.diversityarrays.dalclient.http.DalRequest;
import com.diversityarrays.dalclient.http.DalResponseHandler;
import com.diversityarrays.dalclient.util.Pair;

/**
 * Provide an implementation of DalHttpFactory for use with standard apache http libraries.
 * @author brian
 *
 */
public class DalHttpFactoryImpl implements DalHttpFactory {

    @Override
    public DalRequest createHttpGet(String url) {
        HttpGet httpGet = new HttpGet(url);
        httpGet.setHeader("Cache-Control", "no-cache");
        return new DalRequestImpl(httpGet);
    }

    @SuppressWarnings({ "rawtypes", "unchecked" })
    @Override
    public DalResponseHandler<String> createBasicResponseHandler() {
        return new DalResponseHandlerImpl(new BasicResponseHandler());
    }

    @Override
    public DalCloseableHttpClient createCloseableHttpClient(SSLContext context) {
        HttpClientBuilder builder = HttpClients.custom();
        builder.setSslcontext(context);
        return new DalCloseableHttpClientImpl(builder.build());
    }

    @Override
    public DalRequest createHttpPost(String url, List<Pair<String, String>> pairs, Charset charset) {

        List<NameValuePair> collectedPairs = new ArrayList<NameValuePair>(pairs.size());
        for (Pair<String, String> p : pairs) {
            collectedPairs.add(new BasicNameValuePair(p.a, p.b));
        }

        HttpPost post = new HttpPost(url);
        UrlEncodedFormEntity entity = new UrlEncodedFormEntity(collectedPairs, charset);
        post.setEntity(entity);

        return new DalRequestImpl(post);
    }

    @Override
    public DalRequest createForUpload(String url, List<Pair<String, String>> pairs, String rand_num,
            String namesInOrder, String signature, File fileForUpload) {

        MultipartEntityBuilder builder = MultipartEntityBuilder.create();
        for (Pair<String, String> pair : pairs) {
            builder.addTextBody(pair.a, pair.b);
        }

        builder.addPart("uploadfile", new FileBody(fileForUpload)).addTextBody("rand_num", rand_num)
                .addTextBody("url", url);

        HttpEntity entity = builder.addTextBody("param_order", namesInOrder).addTextBody("signature", signature)
                .build();

        HttpPost post = new HttpPost(url);
        post.setEntity(entity);

        return new DalRequestImpl(post);
    }

    @Override
    public DalRequest createForUpload(String url, List<Pair<String, String>> pairs, String rand_num,
            String namesInOrder, String signature, Factory<InputStream> factory) {

        MultipartEntityBuilder builder = MultipartEntityBuilder.create()
                .addPart("uploadfile", new InputStreamBody(factory.create(), "uploadfile"))
                .addTextBody("rand_num", rand_num).addTextBody("url", url);

        for (Pair<String, String> pair : pairs) {
            builder.addTextBody(pair.a, pair.b);
        }

        HttpEntity entity = builder.addTextBody("param_order", namesInOrder).addTextBody("signature", signature)
                .build();

        HttpPost post = new HttpPost(url);
        post.setEntity(entity);
        return new DalRequestImpl(post);
    }

    @Override
    public DalResponseHandler<HttpResponseInfo> createResponseHandler() {

        return new DalResponseHandler<HttpResponseInfo>() {
            @Override
            public HttpResponseInfo handleResponse(DalCloseableHttpResponse response) throws IOException {

                HttpResponseInfo result = new HttpResponseInfo();

                result.headers = response.getAllHeaders();
                result.httpStatusCode = response.getStatusCode();

                if (DalUtil.isHttpStatusCodeOk(result.httpStatusCode)) {
                    // All is well with the world!
                } else {
                    result.httpErrorReason = response.getReasonPhrase();
                }

                result.serverResponse = response.getEntityAsString();

                return result;
            }
        };

    }

}