Java tutorial
package com.epam.wilma.test.client; /*========================================================================== Copyright 2015 EPAM Systems This file is part of Wilma. Wilma 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. Wilma 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 Wilma. If not, see <http://www.gnu.org/licenses/>. ===========================================================================*/ import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.io.UnsupportedEncodingException; import java.util.zip.GZIPOutputStream; import javax.xml.parsers.ParserConfigurationException; import javax.xml.parsers.SAXParser; import javax.xml.parsers.SAXParserFactory; import org.apache.commons.httpclient.HttpClient; import org.apache.commons.httpclient.HttpException; import org.apache.commons.httpclient.methods.InputStreamRequestEntity; import org.apache.commons.httpclient.methods.PostMethod; import org.apache.commons.io.IOUtils; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.xml.sax.SAXException; import com.sun.xml.fastinfoset.sax.SAXDocumentSerializer; /** * Sends a new HTTP request to a server through a proxy. * @author Marton_Sereg * */ public class HttpRequestSender { private final Logger logger = LoggerFactory.getLogger(HttpRequestSender.class); /** * Sends a new HTTP request to a server through a proxy. * @param requestParameters a set of parameters that will set the content of the request * and specify the proxy it should go through */ public void callWilmaTestServer(final RequestParameters requestParameters, final TestClientParameters clientParameters) { try { HttpClient httpClient = new HttpClient(); String serverUrl = requestParameters.getTestServerUrl(); logger.info("Server URL: " + serverUrl); PostMethod httpPost = new PostMethod(serverUrl); if (clientParameters.isUseProxy()) { String proxyHost = requestParameters.getWilmaHost(); Integer proxyPort = requestParameters.getWilmaPort(); logger.info("Proxy: " + proxyHost + ":" + proxyPort); httpClient.getHostConfiguration().setProxy(proxyHost, proxyPort); } InputStream inputStream = requestParameters.getInputStream(); if (requestParameters.getContentType().contains("fastinfoset")) { logger.info("Compressing it by using FIS."); inputStream = compress(inputStream); } if (requestParameters.getContentEncoding().contains("gzip")) { logger.info("Encoding it by using gzip."); inputStream = encode(inputStream); httpPost.setRequestHeader("Content-Encoding", requestParameters.getContentEncoding()); } InputStreamRequestEntity entity = new InputStreamRequestEntity(inputStream, requestParameters.getContentType()); httpPost.setRequestEntity(entity); String acceptHeader = requestParameters.getAcceptHeader(); logger.info("Accept (header): " + acceptHeader); httpPost.setRequestHeader("Accept", acceptHeader); String acceptEncoding = requestParameters.getAcceptEncoding(); logger.info("Accept-Encoding: " + acceptEncoding); httpPost.addRequestHeader("Accept-Encoding", acceptEncoding); logger.info("Add 'AlterMessage' header."); httpPost.addRequestHeader("AlterMessage", "true"); //always request alter message from Wilma //httpPost.addRequestHeader("0", "WilmaBypass=true"); httpClient.getHttpConnectionManager().getParams() .setSendBufferSize(clientParameters.getRequestBufferSize()); httpClient.getHttpConnectionManager().getParams() .setReceiveBufferSize(clientParameters.getResponseBufferSize()); int statusCode = httpClient.executeMethod(httpPost); logger.info("Response Status Code: " + statusCode); if (clientParameters.getAllowResponseLogging()) { logger.info(getInputStreamAsString(httpPost.getResponseBodyAsStream())); } } catch (UnsupportedEncodingException e) { throw new SystemException("Unsupported encoding.", e); } catch (HttpException e) { throw new SystemException("Http exception occurred.", e); } catch (IOException e) { throw new SystemException("InputStream cannot be read.", e); } } private InputStream encode(final InputStream inputStream) throws IOException { ByteArrayOutputStream baos = new ByteArrayOutputStream(); GZIPOutputStream gout = new GZIPOutputStream(baos); //... Code to read from your original uncompressed data and write to gout. IOUtils.copy(inputStream, gout); gout.finish(); //Convert to InputStream. return new ByteArrayInputStream(baos.toByteArray()); } private String getInputStreamAsString(final InputStream inputStream) throws IOException { return IOUtils.toString(inputStream); } private InputStream compress(final InputStream source) { try { OutputStream fis = new ByteArrayOutputStream(); SAXDocumentSerializer saxDocumentSerializer = new SAXDocumentSerializer(); saxDocumentSerializer.setOutputStream(fis); SAXParserFactory saxParserFactory = SAXParserFactory.newInstance(); saxParserFactory.setNamespaceAware(true); SAXParser saxParser = saxParserFactory.newSAXParser(); saxParser.parse(source, saxDocumentSerializer); return new ByteArrayInputStream(((ByteArrayOutputStream) fis).toByteArray()); } catch (ParserConfigurationException e) { throw new SystemException("error", e); } catch (SAXException e) { throw new SystemException("error", e); } catch (IOException e) { throw new SystemException("error", e); } } }