一.服务端
服务端有2种方式去压缩,一种可以自己压缩,但是更推荐第二种方式,用PrintWriter作为输出流,工具类代码如下:
/** * 判断浏览器是否支持 gzip 压缩 * @param req * @return boolean 值 */ public static boolean isGzipSupport(HttpServletRequest req) { String headEncoding = req.getHeader("accept-encoding"); if (headEncoding == null || (headEncoding.indexOf("gzip") == -1)) { // 客户端 不支持 gzip return false; } else { // 支持 gzip 压缩 return true; } } /** * 创建 以 gzip 格式 输出的 PrintWriter 对象,如果浏览器不支持 gzip 格式,则创建普通的 PrintWriter 对象, * @param req * @param resp * @return * @throws IOException */ public static PrintWriter createGzipPw(HttpServletRequest req, HttpServletResponse resp) throws IOException { PrintWriter pw = null; if (isGzipSupport(req)) { // 支持 gzip 压缩 pw = new PrintWriter(new GZIPOutputStream(resp.getOutputStream())); // 在 header 中设置返回类型为 gzip resp.setHeader("content-encoding", "gzip"); } else { // // 客户端 不支持 gzip pw = resp.getWriter(); } return pw; }
servlet代码如下:
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setCharacterEncoding("utf-8"); response.setHeader("Content-Encoding", "gzip"); String ret = "{\"ContentLayer\":{\"title\":\"内容层\"},\"PageLink\":{\"title\":\"页面跳转\"},\"WebBrowser\":{\"title\":\"浏览器\"}," + "\"InlinePage\":{\"title\":\"内嵌页面\"},\"VideoComp\":{\"title\":\"视频\"}," + "\"PopButton\":{\"title\":\"内容开关\"},\"ZoomingPic\":{\"title\":\"缩放大图\"}," + "\"Rotate360\":{\"title\":\"360度旋转\"}}"; PrintWriter pw = new PrintWriter(new GZIPOutputStream(response.getOutputStream())); pw.write(ret); pw.close(); } public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { this.doPost(request, response); }
在代理软件中跟踪到的数据如下:
«VrÎÏ+IÍ+ñI¬L-R²ªV*É,ÉIU²R:rëÄÝMjuÓS}2ó²e/m>üìÌë«@òá©INEùåŨú¬?pàØw¼g^Nf^*ÈTóoRï[¬àÔåc[ÁÖç8äç¡»nÿª7@ ¢òós3óÒ2UþºýèÏg÷Tå$¤ +r·¸ðäZh¤
实际数据如下:
{"ContentLayer":{"title":"内容层"},"PageLink":{"title":"页面跳转"},"WebBrowser":{"title":"浏览器"},"InlinePage":{"title":"内嵌页面"},"VideoComp":{"title":"视频"},"PopButton":{"title":"内容开关"},"ZoomingPic":{"title":"缩放大图"},"Rotate360":{"title":"360度旋转"}}
二. iOS客户端
利用ASIHttpRequest的功能
创建 request
NSString* urlStr=@"http://localhost:8080/servlet/userInfo";//test servlet urlStr=[urlStr stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];//Support Chinese NSURL *url = [NSURL URLWithString:urlStr]; ASIHTTPRequest* request =[ASIHTTPRequest requestWithURL:url]; request.delegate=self; [request setAllowCompressedResponse:YES];//default is YES. Support gzip stream data [request startAsynchronous];
回调成功函数
BOOL s = [request isResponseCompressed];//is Response add "GZip" format to header // NSData *uncompressedData = [request rawResponseData]; // 未压缩后的数据 NSData *uncompressedData = [request responseData]; // 解压缩后的数据 NSStringEncoding enc = CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingGB_18030_2000); if(request.responseStatusCode==200){ NSString *dataString = [[NSString alloc]initWithData:uncompressedData encoding:enc];//convert to normal NSString NSLog(@"%@",dataString); }