content: package com.baidu.ueditor;
  
  import java.io.BufferedReader;
  import java.io.File;
  import java.io.FileInputStream;
  import java.io.FileNotFoundException;
  import java.io.IOException;
  import java.io.InputStreamReader;
  import java.io.UnsupportedEncodingException;
  import java.util.HashMap;
  import java.util.Map;
  
  import org.json.JSONArray;
  import org.json.JSONObject;
  
  import com.baidu.ueditor.define.ActionMap;
  
  /**
   * 配置管理器
   * @author hancong03@baidu.com
   *
   */
  public final class ConfigManager {
  
  	private final String rootPath;
  	private final String originalPath;
  	private final String contextPath;
  	private static final String configFileName = "config.json";
  	private String parentPath = null;
  	private JSONObject jsonConfig = null;
  	// 涂鸦上传filename定义
  	private final static String SCRAWL_FILE_NAME = "scrawl";
  	// 远程图片抓取filename定义
  	private final static String REMOTE_FILE_NAME = "remote";
  	
  	/*
  	 * 通过一个给定的路径构建一个配置管理器， 该管理器要求地址路径所在目录下必须存在config.properties文件
  	 */
  	private ConfigManager ( String rootPath, String contextPath, String uri ) throws FileNotFoundException, IOException {
  		
  		rootPath = rootPath.replace( "\\", "/" );
  		
  		this.rootPath = rootPath;
  		this.contextPath = contextPath;
  		
  		if ( contextPath.length() > 0 ) {
  			this.originalPath = this.rootPath + uri.substring( contextPath.length() );
  		} else {
  			this.originalPath = this.rootPath + uri;
  		}
  		
  		this.initEnv();
  		
  	}
  	
  	/**
  	 * 配置管理器构造工厂
  	 * @param rootPath 服务器根路径
  	 * @param contextPath 服务器所在项目路径
  	 * @param uri 当前访问的uri
  	 * @return 配置管理器实例或者null
  	 */
  	public static ConfigManager getInstance ( String rootPath, String contextPath, String uri ) {
  		
  		try {
  			return new ConfigManager(rootPath, contextPath, uri);
  		} catch ( Exception e ) {
  			return null;
  		}
  		
  	}
  	
  	// 验证配置文件加载是否正确
  	public boolean valid () {
  		return this.jsonConfig != null;
  	}
  	
  	public JSONObject getAllConfig () {
  		
  		return this.jsonConfig;
  		
  	}
  	
  	public Map<String, Object> getConfig ( int type ) {
  		
  		Map<String, Object> conf = new HashMap<String, Object>();
  		String savePath = null;
  		
  		switch ( type ) {
  		
  			case ActionMap.UPLOAD_FILE:
  				conf.put( "isBase64", "false" );
  				conf.put( "maxSize", this.jsonConfig.getLong( "fileMaxSize" ) );
  				conf.put( "allowFiles", this.getArray( "fileAllowFiles" ) );
  				conf.put( "fieldName", this.jsonConfig.getString( "fileFieldName" ) );
  				savePath = this.jsonConfig.getString( "filePathFormat" );
  				break;
  				
  			case ActionMap.UPLOAD_IMAGE:
  				conf.put( "isBase64", "false" );
  				conf.put( "maxSize", this.jsonConfig.getLong( "imageMaxSize" ) );
  				conf.put( "allowFiles", this.getArray( "imageAllowFiles" ) );
  				conf.put( "fieldName", this.jsonConfig.getString( "imageFieldName" ) );
  				savePath = this.jsonConfig.getString( "imagePathFormat" );
  				break;
  				
  			case ActionMap.UPLOAD_VIDEO:
  				conf.put( "maxSize", this.jsonConfig.getLong( "videoMaxSize" ) );
  				conf.put( "allowFiles", this.getArray( "videoAllowFiles" ) );
  				conf.put( "fieldName", this.jsonConfig.getString( "videoFieldName" ) );
  				savePath = this.jsonConfig.getString( "videoPathFormat" );
  				break;
  				
  			case ActionMap.UPLOAD_SCRAWL:
  				conf.put( "filename", ConfigManager.SCRAWL_FILE_NAME );
  				conf.put( "maxSize", this.jsonConfig.getLong( "scrawlMaxSize" ) );
  				conf.put( "fieldName", this.jsonConfig.getString( "scrawlFieldName" ) );
  				conf.put( "isBase64", "true" );
  				savePath = this.jsonConfig.getString( "scrawlPathFormat" );
  				break;
  				
  			case ActionMap.CATCH_IMAGE:
  				conf.put( "filename", ConfigManager.REMOTE_FILE_NAME );
  				conf.put( "filter", this.getArray( "catcherLocalDomain" ) );
  				conf.put( "maxSize", this.jsonConfig.getLong( "catcherMaxSize" ) );
  				conf.put( "allowFiles", this.getArray( "catcherAllowFiles" ) );
  				conf.put( "fieldName", this.jsonConfig.getString( "catcherFieldName" ) + "[]" );
  				savePath = this.jsonConfig.getString( "catcherPathFormat" );
  				break;
  				
  			case ActionMap.LIST_IMAGE:
  				conf.put( "allowFiles", this.getArray( "imageManagerAllowFiles" ) );
  				conf.put( "dir", this.jsonConfig.getString( "imageManagerListPath" ) );
  				conf.put( "count", this.jsonConfig.getInt( "imageManagerListSize" ) );
  				break;
  				
  			case ActionMap.LIST_FILE:
  				conf.put( "allowFiles", this.getArray( "fileManagerAllowFiles" ) );
  				conf.put( "dir", this.jsonConfig.getString( "fileManagerListPath" ) );
  				conf.put( "count", this.jsonConfig.getInt( "fileManagerListSize" ) );
  				break;
  				
  		}
  		
  		conf.put( "savePath", savePath );
  		conf.put( "rootPath", this.rootPath );
  		
  		return conf;
  		
  	}
  	
  	private void initEnv () throws FileNotFoundException, IOException {
  		
  		File file = new File( this.originalPath );
  		
  		if ( !file.isAbsolute() ) {
  			file = new File( file.getAbsolutePath() );
  		}
  		
  		this.parentPath = file.getParent();
  		
  		String configContent = this.readFile( this.getConfigPath() );
  		
  		try{
  			JSONObject jsonConfig = new JSONObject( configContent );
  			this.jsonConfig = jsonConfig;
  		} catch ( Exception e ) {
  			this.jsonConfig = null;
  		}
  		
  	}
  	
  	private String getConfigPath () {
  		return this.parentPath + File.separator + ConfigManager.configFileName;
  	}
  
  	private String[] getArray ( String key ) {
  		
  		JSONArray jsonArray = this.jsonConfig.getJSONArray( key );
  		String[] result = new String[ jsonArray.length() ];
  		
  		for ( int i = 0, len = jsonArray.length(); i < len; i++ ) {
  			result[i] = jsonArray.getString( i );
  		}
  		
  		return result;
  		
  	}
  	
  	private String readFile ( String path ) throws IOException {
  		
  		StringBuilder builder = new StringBuilder();
  		
  		try {
  			
  			InputStreamReader reader = new InputStreamReader( new FileInputStream( path ), "UTF-8" );
  			BufferedReader bfReader = new BufferedReader( reader );
  			
  			String tmpContent = null;
  			
  			while ( ( tmpContent = bfReader.readLine() ) != null ) {
  				builder.append( tmpContent );
  			}
  			
  			bfReader.close();
  			
  		} catch ( UnsupportedEncodingException e ) {
  			// 忽略
  		}
  		
  		return this.filter( builder.toString() );
  		
  	}
  	
  	// 过滤输入字符串, 剔除多行注释以及替换掉反斜杠
  	private String filter ( String input ) {
  		
  		return input.replaceAll( "/\\*[\\s\\S]*?\\*/", "" );
  		
  	}
  	
  }
  