package Web;

import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;

/**
 * 用于记录一些相应信息 如状态码,cookie等
 *
 * @author Ma
 */
public class Response {

 /**
 * 返回消息实体
 */
 public static String Content = "";
 /**
 * 如果是文件就直接些进去
 */
 public static byte[] FileBytes;
 /**
 * 标记这次是不是请求文件的
 */
 public static boolean IsFile = false;
 public static ArrayList<String> Header = new ArrayList<String>();
 public static String Status = "HTTP/1.1 200 OK";
 public static ArrayList<String> Cookies = new ArrayList<String>();
 public static String ContentType = "text/html;charset=UTF-8;";
 /**
 * 服务器的名字
 */
 public static String Server = Options.ServerName;
 /**
 * 只包含Contest的长度不包含header的长度
 */
 public static int ContentLength;

 /**
 * //禁用页面缓存 <br/>
 * header('Cache-Control: no-cache, no-store, max-age=0,must-revalidate');
 * <br/>
 * header('Expires: 1997年7月26日 05:00:00 GMT');<br/>
 * header('Pragma: no-cache');<br/>
 *
 * public static String X-Powered-By;
 *
 */
 /**
 * 设置状态码 HTTP/1.1 200 OK <br/>
 * HTTP/1.1 303 See Other \r\nLocation:http://www.maiyoule.com/ 结尾没有分号 <br/>
 * HTTP/1.1 304 Not Modified 缓存 <br/>
 * HTTP/1.1 403 Forbidden<br/>
 * HTTP/1.1 404 Not Found <br/>
 * HTTP/1.1 500 Internal Server Error<br/>
 *
 * @param code
 */
 public static void setStatus(int code) {
 String string;
 switch (code) {
 case 200:
 string = "HTTP/1.1 200 OK";
 break;
 case 303:
 string = "HTTP/1.1 303 See Other";
 break;
 case 304:
 string = "HTTP/1.1 304 Not Modified";
 break;
 case 403:
 string = "HTTP/1.1 403 Forbidden";
 break;
 case 404:
 string = "HTTP/1.1 404 Not Found";
 break;
 case 500:
 string = "HTTP/1.1 500 Internal Server Error";
 break;
 default:
 string = "HTTP/1.1 200 OK";
 }
 Response.Status = string;

 }

 /**
 * 设置content-length长度
 *
 * @param length
 */
 public static void setContentLength(int length) {
 Response.ContentLength = length;
 }

 /**
 * 设置ContentType application/json; charset=utf-8; <br/>
 * text/html;charset=UTF-8;<br/>
 * application/xml;charset=UTF-8;<br/>
 */
 public static void setContentType(String type) {
 Response.ContentType = type;
 }

 /**
 * 查找ContentType类型 不能识别的文件,默认当作zip处理
 *
 * @todo 是否允许自己配置
 */
 public static String findContentType(String type) {
 HashMap<String, String> contentType = new HashMap<String, String>();
 contentType.put("html", "text/html;charset=UTF-8;");
 contentType.put("json", "application/json; charset=utf-8;");
 contentType.put("xml", "application/xml;charset=UTF-8;");
 contentType.put("zip", "application/x-zip-compressed");
 contentType.put("ico", "image/x-icon");
 String returnType = "";
 if (contentType.containsKey(type)) {
 returnType = contentType.get(type);
 } else {
 returnType = "application/x-zip-compressed";
 }
 return returnType;
 }

 /**
 * 设置返回实体
 *
 * @param content
 */
 public static void setContent(String content) {
 Response.Content = content;
 }

 /**
 * 追加返回实体
 *
 * @param content
 */
 public static void addContent(String content) {
 Response.Content = Response.Content + content;
 }

 /**
 * 添加自定义Header
 *
 * @param header
 * @return
 */
 public static boolean header(String header) {
 return Response.Header.add(header);
 }

 /**
 * 获取此次响应的header
 *
 * @return
 */
 public static String getHeader() {
 String header;
 header = Response.Status + "\r\n";
 //检查cookie
 for (int i = 0; i < Response.Cookies.size(); i++) {
 header += Response.Cookies.get(i) + "\r\n";
 }
 header += "Content-type: " + Response.ContentType + "\r\n";
 header += "Content-ength: " + Response.ContentLength + "\r\n";
 //检查自定义Header
 for (int i = 0; i < Response.Header.size(); i++) {
 header += Response.Header.get(i) + "\r\n";
 }

 header += "Server: " + Response.Server + "\r\n\r\n";

 return header;
 }

 public static byte[] getContentBytes() throws UnsupportedEncodingException {

 return Response.Content.getBytes("UTF-8");
 }

 /**
 * 请求结束,清理信息
 */
 public static void finish() {

 Response.Status = "HTTP/1.1 200 OK";
 Response.Content = "";
 Response.Header = new ArrayList<String>();
 Response.Cookies = new ArrayList<String>();
 Response.ContentLength = 0;
 Response.ContentType = "text/html;charset=UTF-8;";
 Response.FileBytes = new byte[0];
 //取消是文件标识
 Response.IsFile = false;
 }
}