首页 > 代码库 > 客户端HttpClient处理 Servlet Gzip
客户端HttpClient处理 Servlet Gzip
服务端采用gzip对文本内容进行压缩处理,客户端使用HttpClient获取数据并进行gzip解压缩。
一: 服务端
public class GzipTestServlet extends HttpServlet { protected void processRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setHeader("Cache-Control", "no-cache"); response.setContentType("text/html;charset=UTF-8"); String str = "中文测试this is a test!"; if (isGzipSupport(request)) {//支持gzip response.setHeader("Content-Encoding", "gzip"); OutputStream os = response.getOutputStream(); GZIPOutputStream gs = new GZIPOutputStream(os); gs.write(str.getBytes("UTF-8"));//解决中文乱码问题 gs.finish(); gs.close(); os.close(); } else { PrintWriter out = response.getWriter(); out.write(str); out.flush(); out.close(); } } /** * 判断客户端是否要求进行gzip压缩处理 * @param request * @return */ private boolean isGzipSupport(HttpServletRequest request) { String headEncoding = request.getHeader("accept-encoding"); return (headEncoding != null && (headEncoding.indexOf("gzip") != -1)); } @Override protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { processRequest(request, response); } @Override protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { processRequest(request, response); } }
二:客户端
采用HttpClient3.1。
(1)UngzipPostMethod.java
/** * 继承PostMethod重写getResponseBodyAsString方法支持Gzip解压缩*/ public class UngzipPostMethod extends org.apache.commons.httpclient.methods.PostMethod{ public UngzipPostMethod(String uri){ super(uri); } @Override public String getResponseBodyAsString() throws IOException { GZIPInputStream gzin; if(getResponseBody()!=null ||getResponseStream() != null ){ if(getResponseHeader("Content-Encoding") != null && getResponseHeader("Content-Encoding").getValue().toLowerCase().indexOf("gzip") != -1) { InputStream is = getResponseBodyAsStream(); gzin = new GZIPInputStream(is); InputStreamReader isr = new InputStreamReader(gzin,getResponseCharSet()); BufferedReader br = new BufferedReader(isr); StringBuilder sb = new StringBuilder(); String tmp; while((tmp = br.readLine())!=null){ sb.append(tmp); sb.append("\r\n"); } br.close(); isr.close(); return sb.toString(); }else{ //否则正常返回 return super.getResponseBodyAsString(); } }else{ return null; } } }
(2)HttpUtil.java
public class HttpUtil { /** * 获取到解压缩的内容 * @param url * @param list * @return */ public String postGzipRequest(String url, List<NameValuePair> list){ HttpClient client = new HttpClient(); UngzipPostMethod post = new UngzipPostMethod(url); post.setRequestHeader("Accept-Encoding", "gzip, deflate"); post.getParams().setParameter(HttpMethodParams.HTTP_CONTENT_CHARSET, "UTF-8"); StringBuilder sb = new StringBuilder(); if(list!=null){ int len = list.size(); NameValuePair[] params = new NameValuePair[len]; for(int i=0; i<len; i++){ params[i] = list.get(i); } post.setRequestBody(params); } try { //执行post int statusCode = client.executeMethod(post); if (statusCode == HttpStatus.SC_OK) { sb.append(post.getResponseBodyAsString()); } } catch (IOException ex) { java.util.logging.Logger.getLogger(HttpUtil.class.getName()).log(Level.SEVERE, null, ex); } return sb.toString(); }
}
(3)Test.java
public class Test { public static void main(String args[]){ HttpUtil httpUtil = new HttpUtil(); String url = "http://localhost:8080/tsmanager/GzipTestServlet.do"; System.out.println("内容:"+httpUtil.postGzipRequest(url, null)); } }
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