使用带有 ajax 请求的表单调用 Servlet (FIlter)（必须使用授权 headers）

Question

我不明白为什么它不起作用。也许问题出在 url 模式中？或者我不明白数据流？请注意，只有 login.jsp 可以修改。回复看link授权header未设置。我尝试了所有在网上找到的东西，但它不起作用。也许你可以提示我一个教程来做到这一点。提前感谢您的宝贵时间。

login.jsp

<html>
  <head>
<title>Login</title>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.0/jquery.min.js"></script>
<script>
    $(document).ready(function(){
        $("#lsubmit").click(function(){
            var username = $("#lmail").val();
            var password = $("#lpsw").val();

            $.ajax({
                url : '/seller/*',
                method : 'POST',
                data: '{"username": "' + username + '", "password" : "' + 
                password + '"}',
                beforeSend : function(req) {
                    req.setRequestHeader('Authorization', "inserirebase48");
                }
            });
        });
    });
</script> </head>
<body>
 <form>
Email: <input type="text" id="lmail"><br>
Password: <input type="password" id="lpsw"><br>
<input type="button" id="lsubmit" value="Login">
 </form>
</body>
</html>

web.xml的部分

 <filter>
    <filter-name>filterAuthenticationSeller</filter-name>
    <filter-class>servlets.FilterAuthenticationSeller</filter-class>
</filter>
<filter-mapping>
    <filter-name>filterAuthenticationSeller</filter-name>
    <url-pattern>/seller/*</url-pattern>
</filter-mapping>

FilterAutheniticationSeller.java

package servlets;

 import utils.authenticationManager.AuthenticationService;

 import javax.servlet.*;
 import javax.servlet.annotation.WebFilter;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 import java.io.IOException;

import static utils.Utils.createResponse_UNAUTHORIZED;
@WebFilter(filterName = "FilterAuthenticationSeller")

public class FilterAuthenticationSeller implements Filter {

    AuthenticationService authenticationService = new 
       AuthenticationService();


      public void init(FilterConfig config) { }


       public void destroy() { }


public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws ServletException, IOException {

    if(servletRequest instanceof HttpServletRequest) {

        HttpServletRequest httpServletRequest = (HttpServletRequest) servletRequest;

        // if registration :  POST (path: '/users' + body) go on the next servlet
        // if login : POST (path: '/users/0' + body ) go on the next servlet
        if(httpServletRequest.getMethod().equals("POST")
                && httpServletRequest.getServletPath().contains("users")
                && (httpServletRequest.getPathInfo() == null || httpServletRequest.getPathInfo().equals("/0"))) {
            filterChain.doFilter(servletRequest, servletResponse);
            return;
        }

        // else, check user and go on OR unauthorized
        String authorization = httpServletRequest.getHeader("Authorization");
        boolean authenticated = authenticationService.authenticateSeller(authorization);
        if(authenticated)
            filterChain.doFilter(servletRequest, servletResponse);
        else

            createResponse_UNAUTHORIZED((HttpServletResponse) servletResponse);
    }
}

}

Answer 1

尝试从 ajax post 中删除 seller/* 并指定正确的目标 url

Answer 2

好的 url 是正确的，但现在问题出在 ajax 响应上，我添加

                 .............
                success: function(){
                    alert('success!');
                },
                error: function (request, status, error) {
                    alert(request.status);
                }
                 ...........

状态是404，为什么？我不明白 FilterAutheniticationSeller.java 中的最后两行代码，它是用 "doFilter" 调用自己的吗？我用我的参数进行了测试和验证，这是真的

使用带有 ajax 请求的表单调用 Servlet (FIlter)（必须使用授权 headers）

Call a Servelt (FIlter) using a form with an ajax request (must use authorization headers)

java

ajax

jquery

servlets

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