package com.foxinmy.weixin4j.util;
   
   import static io.netty.handler.codec.http.HttpHeaderNames.CONNECTION;
   import static io.netty.handler.codec.http.HttpHeaderNames.CONTENT_LENGTH;
   import static io.netty.handler.codec.http.HttpHeaderNames.CONTENT_TYPE;
   import static io.netty.handler.codec.http.HttpHeaderNames.DATE;
   import static io.netty.handler.codec.http.HttpHeaderNames.USER_AGENT;
   import static io.netty.handler.codec.http.HttpVersion.HTTP_1_1;
   import io.netty.buffer.Unpooled;
  import io.netty.handler.codec.http.DefaultFullHttpResponse;
  import io.netty.handler.codec.http.FullHttpResponse;
  import io.netty.handler.codec.http.HttpHeaderValues;
  import io.netty.handler.codec.http.HttpResponse;
  import io.netty.handler.codec.http.HttpResponseStatus;
  
  import java.util.Date;
  
  import com.foxinmy.weixin4j.startup.WeixinServerBootstrap;
  
  /**
   * HTTP工具类
   *
   * @className HttpUtil
   * @author jinyu(foxinmy@gmail.com)
   * @date 2014年11月15日
   * @since JDK 1.6
   * @see
   */
  public class HttpUtil {
  
  	private static String SERVER = "netty4";
  	private static String WEIXIN4J = "weixin4j-server";
  
  	/**
  	 * 创建有内容的HttpResponse响应
  	 *
  	 * @param content
  	 *            响应内容
  	 * @param contentType
  	 *            响应类型
  	 * @return HttpResponse
  	 */
  	public static HttpResponse createHttpResponse(String content,
  			String contentType) {
  		FullHttpResponse httpResponse = new DefaultFullHttpResponse(HTTP_1_1,
  				HttpResponseStatus.OK, Unpooled.copiedBuffer(content,
  						ServerToolkits.UTF_8));
  		httpResponse.headers().set(
  				CONTENT_TYPE,
  				String.format("%s;encoding=%s", contentType,
  						ServerToolkits.UTF_8.displayName()));
  		httpResponse.headers().set(CONTENT_LENGTH,
  				content.getBytes(ServerToolkits.UTF_8).length);
  		resolveHeaders(httpResponse);
  		return httpResponse;
  	}
  
  	public static void resolveHeaders(FullHttpResponse httpResponse) {
  		/*
  		 * if (HttpHeaders.isKeepAlive(httpRequest)) {
  		 * httpResponse.headers().set(CONNECTION, Values.KEEP_ALIVE); } if
  		 * (HttpHeaders.isTransferEncodingChunked(httpRequest)) {
  		 * httpResponse.headers().set(TRANSFER_ENCODING, Values.CHUNKED); }
  		 */
  		httpResponse.headers().set(CONNECTION, HttpHeaderValues.CLOSE);
  		httpResponse.headers().set(DATE, new Date());
  		httpResponse.headers().set(SERVER, SERVER);
  		httpResponse.headers()
  				.set(USER_AGENT,
  						String.format("%s/%s", WEIXIN4J,
  								WeixinServerBootstrap.VERSION));
  	}
  }