Java tutorial
/** * ACHttpClient.java * * Copyright : (C) 2008 by Honnix * Email : hxliang1982@gmail.com * * 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.honnix.yaacs.adapter.http; import java.io.IOException; import java.io.UnsupportedEncodingException; import java.util.ArrayList; import java.util.List; import java.util.Map; import org.apache.commons.httpclient.HttpClient; import org.apache.commons.httpclient.HttpStatus; import org.apache.commons.httpclient.methods.PostMethod; import org.apache.commons.httpclient.methods.StringRequestEntity; import com.honnix.yaacs.adapter.AdapterClient; import com.honnix.yaacs.adapter.data.model.AlbumCoverRaw; import com.honnix.yaacs.adapter.http.constant.ACHttpConstant; import com.honnix.yaacs.adapter.http.error.ACHttpError; import com.honnix.yaacs.adapter.http.util.ACHttpBodyUtil; import com.honnix.yaacs.error.ACError; import com.honnix.yaacs.exception.ACException; /** * */ public class ACHttpClient implements AdapterClient { private static final String FILE_CONTENT_ENCODE = "Base64"; private static final String CHARSET = "utf-8"; private String sessionControlUrl; private String acRequestUrl; private String host; private int port; private HttpClient httpClient; private String sessionId; public ACHttpClient(String host, int port, String sessionControlUrl, String acRequestUrl) { super(); this.host = host; this.port = port; this.sessionControlUrl = sessionControlUrl; this.acRequestUrl = acRequestUrl; httpClient = new HttpClient(); } /** * @param responseMap */ private List<AlbumCoverRaw> buildACRawList(Map<String, String> responseMap) { int count = Integer.parseInt(responseMap.get(ACHttpConstant.AC_COUNT_KEY)); List<AlbumCoverRaw> acRawList = new ArrayList<AlbumCoverRaw>(count); for (int i = 0; i < count; ++i) { String suffix = new StringBuilder(ACHttpConstant.AC_AT).append(i).toString(); if (FILE_CONTENT_ENCODE.equals(responseMap .get(new StringBuilder(ACHttpConstant.AC_FILE_CONTENT_ENCODE_KEY).append(suffix).toString()))) { String discId = responseMap .get(new StringBuilder(ACHttpConstant.ALBUM_DISC_ID_KEY).append(suffix).toString()); String artist = responseMap .get(new StringBuilder(ACHttpConstant.ARTIST_KEY).append(suffix).toString()); String year = responseMap.get(new StringBuilder(ACHttpConstant.YEAR_KEY).append(suffix).toString()); String albumName = responseMap .get(new StringBuilder(ACHttpConstant.ALBUM_NAME_KEY).append(suffix).toString()); String acFileContent = responseMap .get(new StringBuilder(ACHttpConstant.AC_FILE_CONTENT_KEY).append(suffix).toString()); acRawList.add(new AlbumCoverRaw(discId, artist, year, albumName, acFileContent)); } } return acRawList; } private PostMethod buildPostMethod(String url, String request) { StringBuilder sb = new StringBuilder("http://").append(host).append(':').append(port).append(url); PostMethod postMethod = new PostMethod(sb.toString()); sb = new StringBuilder(ACHttpConstant.HTTP_CONTENT_TYPE).append(" charset=").append(CHARSET); postMethod.setRequestHeader("Content-Type", sb.toString()); try { StringRequestEntity requestEntity = new StringRequestEntity(request, null, CHARSET); postMethod.setRequestEntity(requestEntity); } catch (UnsupportedEncodingException e) { postMethod = null; } return postMethod; } private void checkResponse(Map<String, String> responseMap) throws ACException { if (!String.valueOf(ACError.SUCCESS).equals(responseMap.get(ACHttpConstant.RESPONSE_CODE_KEY))) { throw ACHttpBodyUtil.buildACException(responseMap); } } public List<AlbumCoverRaw> getACListByAlbum(AlbumCoverRaw albumCoverRaw) throws ACException { Map<String, String> responseMap = sendAndReceive(acRequestUrl, ACHttpBodyUtil.buildGetACListByAlbumRequestBody(sessionId, albumCoverRaw.getArtist(), albumCoverRaw.getYear(), albumCoverRaw.getAlbumName())); return buildACRawList(responseMap); } public List<AlbumCoverRaw> getACListByDiscId(AlbumCoverRaw albumCoverRaw) throws ACException { Map<String, String> responseMap = sendAndReceive(acRequestUrl, ACHttpBodyUtil.buildGetACListByDiscIdRequestBody(sessionId, albumCoverRaw.getDiscId())); return buildACRawList(responseMap); } public void login(String userId, String password) throws ACException { Map<String, String> responseMap = sendAndReceive(sessionControlUrl, ACHttpBodyUtil.buildLoginRequestBody(userId, password)); sessionId = responseMap.get(ACHttpConstant.SESSION_ID_KEY); } public void logout() throws ACException { sendAndReceive(sessionControlUrl, ACHttpBodyUtil.buildLogoutRequestBody(sessionId)); } public void putAC(AlbumCoverRaw albumCoverRaw) throws ACException { sendAndReceive(acRequestUrl, ACHttpBodyUtil.buildPutACRequestBody(sessionId, albumCoverRaw.getDiscId(), albumCoverRaw.getArtist(), albumCoverRaw.getYear(), albumCoverRaw.getAlbumName(), FILE_CONTENT_ENCODE, albumCoverRaw.getAcFileContent())); } private Map<String, String> sendAndReceive(String url, String request) throws ACException { Map<String, String> responseMap = null; PostMethod postMethod = buildPostMethod(url, request); if (postMethod == null) { throw new ACException(ACHttpError.INTERNAL_ERROR_MSG, ACHttpError.INTERNAL_ERROR); } int statusCode = -1; try { statusCode = httpClient.executeMethod(postMethod); } catch (Exception e) { throw new ACException(ACHttpError.INTERNAL_ERROR_MSG, ACHttpError.INTERNAL_ERROR, e); } if (statusCode == HttpStatus.SC_OK) { try { responseMap = ACHttpBodyUtil.buildParameterMap(postMethod.getResponseBodyAsStream(), postMethod.getResponseCharSet()); } catch (IOException e) { throw new ACException(ACHttpError.INTERNAL_ERROR_MSG, ACHttpError.INTERNAL_ERROR, e); } finally { postMethod.releaseConnection(); } } else { throw new ACException(ACHttpError.BAD_STATUS_CODE_MSG, ACHttpError.BAD_STATUS_CODE); } checkResponse(responseMap); return responseMap; } }