Java tutorial
/* * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You under the Apache License, Version 2.0 * (the "License"); you may not use this file except in compliance with * the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.codelabor.system.remoting.http.services; import java.util.Iterator; import java.util.Locale; import java.util.Map; import java.util.Set; import org.apache.commons.httpclient.DefaultHttpMethodRetryHandler; import org.apache.commons.httpclient.HttpClient; import org.apache.commons.httpclient.HttpStatus; import org.apache.commons.httpclient.methods.GetMethod; import org.apache.commons.httpclient.methods.PostMethod; import org.apache.commons.httpclient.methods.RequestEntity; import org.apache.commons.httpclient.methods.StringRequestEntity; import org.apache.commons.httpclient.params.DefaultHttpParams; import org.apache.commons.httpclient.params.HttpClientParams; import org.apache.commons.httpclient.params.HttpMethodParams; import org.apache.commons.httpclient.params.HttpParams; import org.apache.commons.httpclient.util.URIUtil; import org.codelabor.system.services.BaseServiceImpl; /** * @author Sang Jae Shin * */ public class HttpAdapterServiceImpl extends BaseServiceImpl implements HttpAdapterService { protected String url = null; protected String charsetName = "UTF-8"; protected String contentType = "text/html;charset=UTF-8"; private int retry = 3; public String getContentType() { return contentType; } public void setContentType(String contentType) { this.contentType = contentType; } public String getCharsetName() { return charsetName; } public void setCharsetName(String charsetName) { this.charsetName = charsetName; } public String getUrl() { return url; } public void setUrl(String url) { this.url = url; } public String requestByGetMethod(Map<String, String> parameterMap) throws Exception { String responseBody = null; GetMethod method = null; try { StringBuilder sb = new StringBuilder(); sb.append(url); if (url.indexOf("?") == -1) { sb.append("?"); } Set<String> keySet = parameterMap.keySet(); Iterator<String> iter = keySet.iterator(); String parameterKey = null; while (iter.hasNext()) { parameterKey = iter.next(); sb.append(parameterKey); sb.append("="); sb.append(parameterMap.get(parameterKey)); if (iter.hasNext()) { sb.append("&"); } } String encodedURI = URIUtil.encodeQuery(sb.toString()); logger.debug("encodedURI: {}", encodedURI); method = new GetMethod(encodedURI); HttpParams httpParams = new DefaultHttpParams(); DefaultHttpMethodRetryHandler retryHandler = new DefaultHttpMethodRetryHandler(retry, false); httpParams.setParameter(HttpMethodParams.RETRY_HANDLER, retryHandler); HttpClient httpClient = new HttpClient(new HttpClientParams(httpParams)); int statusCode = httpClient.executeMethod(method); logger.debug("statusCode: {}", statusCode); switch (statusCode) { case HttpStatus.SC_OK: responseBody = method.getResponseBodyAsString(); logger.debug("responseBody: {}", responseBody); break; } } catch (Exception e) { if (logger.isErrorEnabled()) { String messageKey = "error.http.request"; String userMessage = messageSource.getMessage(messageKey, new String[] {}, "default message", Locale.getDefault()); logger.error(userMessage, e); } e.printStackTrace(); throw e; } finally { if (method != null) { method.releaseConnection(); } } return responseBody; } public int getRetry() { return retry; } public void setRetry(int retry) { this.retry = retry; } public String requestByPostMethod(String content) throws Exception { String responseBody = null; PostMethod method = null; RequestEntity requestEntity = null; try { requestEntity = new StringRequestEntity(content, contentType, charsetName); method = new PostMethod(url); method.setRequestEntity(requestEntity); HttpClient httpClient = new HttpClient(); int statusCode = httpClient.executeMethod(method); logger.debug("statusCode: {}", statusCode); switch (statusCode) { case HttpStatus.SC_OK: responseBody = method.getResponseBodyAsString(); logger.debug("responseBody: {}", responseBody); break; } } catch (Exception e) { e.printStackTrace(); throw e; } finally { if (method != null) { method.releaseConnection(); } } return responseBody; } }