客户端 HttpUtils.java

本文介绍了一个简单的Java Web登录验证示例,通过使用Servlet进行HTTP请求处理,并演示了如何接收用户名和密码参数,实现基本的身份验证逻辑。

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import java.io.IOException; import java.io.PrintWriter; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; public class LoginAction extends HttpServlet { /** * Constructor of the object. */ public LoginAction() { super(); /** * Destruction of the servlet. <br> */ public void destroy() { super.destroy(); // Just puts "destroy" string in log // Put your code here /** * The doGet method of the servlet. <br> * This method is called when a form has its tag value method equals to get. *@param request * the request send by the client to the server @param response * the response send by the server to the client @throws ServletException * if an error occurred @throws IOException * if an error occurred */public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { this.doPost(request, response); /** * The doPost method of the servlet. <br> * This method is called when a form has its tag value method equals to * post. @param request * the request send by the client to the server @param response * the response send by the server to the client @throws ServletException * if an error occurred @throws IOException * if an error occurred */public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {response.setContentType("text/html;charset=utf-8");request.setCharacterEncoding("utf-8");response.setCharacterEncoding("utf-8"); //客户端 HttpUtils并没有写request方法是post ,但服务器端可自动识别 String method = request.getMethod(); System.out.println("request method :"+method); PrintWriter out = response.getWriter();String username = request.getParameter("username");System.out.println("-username->>"+username); String password = request.getParameter("password");System.out.println("-password->>"+password); if (username.equals("admin") && password.equals("123")) { // 表示服务器段返回的结果 out.print("login is success !"); else { out.print("login is fail !"); out.flush(); out.close(); /** * Initialization of the servlet. <br> @throws ServletException    * if an error occurs */ public void init() throws ServletException { // Put your code here } }
``` private TransmitTarget generateTransmitTarget(String traceId, HttpServletRequest request) throws JsonProcessingException { String ip = HttpUtils.getRemoteIp(request); String uri = request.getRequestURI().trim(); String queryString = request.getQueryString(); String method = request.getMethod(); Quadruple quadruple = HttpUtils.apiLocationMetadata(traceId, uri, queryString); String configuration = redisClient.get(RedisUtils.apiConfigKey(quadruple.getNamespace(), quadruple.getAction(), quadruple.getVersion())); InterfaceConfig interfaceConfig = new InterfaceConfig(); if (configuration != null) { interfaceConfig = JsonUtils.getObjectMapper().readValue(configuration, InterfaceConfig.class); } else { // 接口配置为空时,检查接口是否注册,刷新注册接口,并标记未注册接口 checkApiRegisterStatus(traceId, quadruple, interfaceConfig); } SentinelUtils.initFlowRules(quadruple.getNamespace(), flowLimitConfig.getMaps().getOrDefault(quadruple.getNamespace(), flowLimitConfig.getDefaultQps())); try (Entry ignored = SphU.entry(quadruple.getNamespace())) { businessConfig.refuseBlockList(traceId, interfaceConfig.getInterfaceType(), ip); if (interfaceConfig.getHttpMethod() == null || !interfaceConfig.getHttpMethod().equalsIgnoreCase(method) || !interfaceConfig.getHttpMethod().toUpperCase(Locale.ROOT).contains(method)) { throw new MethodNotAllowedException(traceId, RespCode.METHOD_NOT_ALLOWED); } Map<String, String> headers = HttpUtils.obtainHeaders(traceId, request, ip); this.authenticate(traceId, interfaceConfig, headers); return TransmitTarget.builder().cbResourceName(StringUtils.obtainServiceName(interfaceConfig.getServerAddress())).uri(HttpUtils.generateUrl(interfaceConfig.getServerAddress(), interfaceConfig.getRealPath(), quadruple.getQueryString())).headers(headers).build(); } catch (BlockException e) { Logger.outerRequestError(this.getClass().getName(), "generateTransmitTarget", String.format("trace_id:%s, resource_name: %s rate limited, action: %s", traceId, quadruple.getNamespace(), quadruple.getAction()), e); throw new ServerBusyException(traceId, RespCode.SERVER_BUSY); } }```解释该代码段
最新发布
03-12
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