httpmediatypemanager.java

RFC 1945 Http1.0协议实现。对协议进行了完整面向对象设计

/**
 * 
 */
package edu.sysu.http.util;

import java.io.File;

import edu.sysu.http.impl.HttpType;

/**
 * @author Administrator
 * 
 */
public class HttpMediaTypeManager {

	/**
	 * 
	 */
	public HttpMediaTypeManager() {
		// TODO Auto-generated constructor stub
	}

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub

	}

	/**
	 * static class for Singleton design pattern, instance of
	 * HttpMediaTypeManager will be created when the first time you make a call
	 * to HttpMediaTypeManager.getInstance
	 * 
	 * @author Cyberpet
	 * @see HttpMediaTypeManager#getInstance()
	 */
	static class HttpMediaTypeManagerSingletonHolder {
		static HttpMediaTypeManager instance = new HttpMediaTypeManager();
	}

	/**
	 * get the only instance of HttpMediaTypeManager
	 * 
	 * @return HttpMediaTypeManager
	 * @see HttpMediaTypeManager
	 */
	public static HttpMediaTypeManager getInstance() {
		return HttpMediaTypeManagerSingletonHolder.instance;
	}

	public HttpType getType(File file) {
		try {
			String name = file.getName();
			if (name.endsWith("htm") || name.endsWith("html"))
				return new HttpType("text", "html");
			else if (name.endsWith("jpg"))
				return new HttpType("image", "jpg");
			else if (name.endsWith("gif"))
				return new HttpType("image", "gif");
			else if (name.endsWith("bmp"))
				return new HttpType("image", "bmp");
			else
				return new HttpType("application", "octet-stream");
		} catch (Exception e) {
			e.printStackTrace();
			return null;
		}
	}

}