SpringSecurity(二)获取JSON格式的用户名密码

SpringSecurity获取JSON格式的用户名密码

SpringSecurity环境
- pom.xml
自定义获取用户名和密码
- SpringSecurity自带的方式
- 自定义获取用户名密码的方式

SpringSecurity环境

pom.xml

pom.xml依赖

	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.4.2</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>

	<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-devtools</artifactId>
			<scope>runtime</scope>
			<optional>true</optional>
		</dependency>

		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
		</dependency>

		<!-- SpringSecurity的依赖 -->
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-security</artifactId>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-configuration-processor</artifactId>
			<optional>true</optional>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-aop</artifactId>
		</dependency>
		
		<dependency>
			<groupId>com.alibaba</groupId>
			<artifactId>fastjson</artifactId>
			<version>1.2.70</version>
		</dependency>

自定义获取用户名和密码

SpringSecurity自带的方式

UsernamePasswordAuthenticationFilter.java 这个类是处理身份验证表单提交

其中的方法

attemptAuthentication(HttpServletRequest request, HttpServletResponse response)

就是获取用户名和密码的方法

	@Override
	public Authentication attemptAuthentication(HttpServletRequest request, HttpServletResponse response)
			throws AuthenticationException {
		if (this.postOnly && !request.getMethod().equals("POST")) {
			throw new AuthenticationServiceException("Authentication method not supported: " + request.getMethod());
		}
		String username = obtainUsername(request);
		username = (username != null) ? username : "";
		username = username.trim();
		String password = obtainPassword(request);
		password = (password != null) ? password : "";
		UsernamePasswordAuthenticationToken authRequest = new UsernamePasswordAuthenticationToken(username, password);
		// Allow subclasses to set the "details" property
		setDetails(request, authRequest);
		return this.getAuthenticationManager().authenticate(authRequest);
	}

其中有两个方法obtainPassword(),obtainUsername()这就是SpringSecurity获取用户名和密码的方法

@Nullable
	protected String obtainPassword(HttpServletRequest request) {
		return request.getParameter(this.passwordParameter);
	}
@Nullable
	protected String obtainUsername(HttpServletRequest request) {
		return request.getParameter(this.usernameParameter);
	}

可以发现默认的是获取param里的内容，如果是JSON格式的用户名和密码的话是无法获取的，之后我们可以用一个类

继承 UsernamePasswordAuthenticationFilter

并重写其中的

attemptAuthentication

方法获取JSON格式的用户名和密码，你也可重写obtainPassword,obtainUsername这两个方法达成同样的目的。

自定义获取用户名密码的方式

获取JSON格式的用户名密码

新建MyUsernamePasswordAuthenticationFilter继承UsernamePasswordAuthenticationFilter

重写attemptAuthentication方法

public class MyUsernamePasswordAuthenticationFilter extends UsernamePasswordAuthenticationFilter {

    @Override
    public Authentication attemptAuthentication(HttpServletRequest request, HttpServletResponse response) throws AuthenticationException {
        String username = null;
        String password = null;
        try {
            JSONObject jsonObject = JsonUtils.getRequestJsonObject(request);
            System.out.println(jsonObject);
            username = String.valueOf(jsonObject.get("username"));
            password = String.valueOf(jsonObject.get("password"));
            username = (username != null) ? username : "";
            password = (password != null) ? password : "";
        } catch (IOException e) {
            e.printStackTrace();
        }
        UsernamePasswordAuthenticationToken authRequest = new UsernamePasswordAuthenticationToken(username, password);
        return this.getAuthenticationManager().authenticate(authRequest);
    }
}

在SecurityConfiguration中配置他

    @Bean
    public UsernamePasswordAuthenticationFilter usernamePasswordAuthenticationFilter() throws Exception {
        UsernamePasswordAuthenticationFilter filter = new MyUsernamePasswordAuthenticationFilter();
        //这里设置自带的AuthenticationManager，否则要自己写一个
        filter.setAuthenticationManager(authenticationManagerBean());
        //设置处理成功处理器
        filter.setAuthenticationSuccessHandler(new AuthenticationSuccessHandler() {
            @Override
            public void onAuthenticationSuccess(HttpServletRequest request, HttpServletResponse response, Authentication authentication) throws IOException, ServletException {
                response.setContentType("application/json;charset=UTF-8");
                String message = "登录成功";
                PrintWriter printWriter = response.getWriter();
                printWriter.write(message);
                printWriter.flush();
                printWriter.close();
            }
        });
        //设置过滤器拦截路径
        filter.setFilterProcessesUrl("/newlogin");
        return filter;
    }


    @Bean
    @Override
    public AuthenticationManager authenticationManagerBean() throws Exception {
        return super.authenticationManagerBean();
    }

我们使用postmen测试 http://localhost:8080/newlogin

在这里插入图片描述

这里解释一下为什么这么配置

先看一下不自定义的配置

.and()
                //开启登录
                .formLogin()
                //登录页面路径
                .loginPage("/toLogin")
                //执行登录的路径
                .loginProcessingUrl("/login")
                //登录成功后转发页面
                .successForwardUrl("/index")
                //.successHandler()
                .permitAll()

这里的 .loginProcessingUrl(“/login”)在源码中是调用

setRequiresAuthenticationRequestMatcher

方法

	public T loginProcessingUrl(String loginProcessingUrl) {
		this.loginProcessingUrl = loginProcessingUrl;
		this.authFilter.setRequiresAuthenticationRequestMatcher(createLoginProcessingUrlMatcher(loginProcessingUrl));
		return getSelf();
	}

最后实际上调用的是下面的第二个方法

自定义过滤器中 filter.setFilterProcessesUrl(“/newlogin”) 最后调用的是第一方法然后调用第二个方法，也就是可以说等于 .loginProcessingUrl(“/login”)

	public void setFilterProcessesUrl(String filterProcessesUrl) {
		setRequiresAuthenticationRequestMatcher(new AntPathRequestMatcher(filterProcessesUrl));
	}

	public final void setRequiresAuthenticationRequestMatcher(RequestMatcher requestMatcher) {
		Assert.notNull(requestMatcher, "requestMatcher cannot be null");
		this.requiresAuthenticationRequestMatcher = requestMatcher;
	}

也就是说我们配置 filter.setFilterProcessesUrl(“/newlogin”) 就是在配置 .loginProcessingUrl(“/login”)

只不过 filter.setFilterProcessesUrl(“/newlogin”)是在配置我们自定义的过滤器，而 .loginProcessingUrl(“/login”)是在配置自带的过滤器。实际是在进行同样配置操作。

这里.successForwardUrl(“/index”)和.successHandler()

这个被我注释掉了

，在源码中也是差不多的操作

	public FormLoginConfigurer<H> successForwardUrl(String forwardUrl) {
		successHandler(new ForwardAuthenticationSuccessHandler(forwardUrl));
		return this;
	}

	public final T successHandler(AuthenticationSuccessHandler successHandler) {
		this.successHandler = successHandler;
		return getSelf();
	}

通过上面代码我们可以看出.successForwardUrl(“/index”)实际上就是调用了successHandler(),只不过用了一个ForwardAuthenticationSuccessHandler封装了一下。

再看看我们对自定义过滤器的配置一下就明白了

//设置处理成功处理器
        filter.setAuthenticationSuccessHandler(new AuthenticationSuccessHandler() {
            @Override
            public void onAuthenticationSuccess(HttpServletRequest request, HttpServletResponse response, Authentication authentication) throws IOException, ServletException {
                response.setContentType("application/json;charset=UTF-8");
                String message = "登录成功";
                PrintWriter printWriter = response.getWriter();
                printWriter.write(message);
                printWriter.flush();
                printWriter.close();
            }
        });

漏了一个配置这里补一下,配置在configure(HttpSecurity http)方法中的。

		//在UsernamePasswordAuthenticationFilter之前调用我们自定义的过滤器
        http.addFilterAt(usernamePasswordAuthenticationFilter(),UsernamePasswordAuthenticationFilter.class);

举一反三我们可以有更多的设置

登出成功处理器

 .and()
                //开启登出
                .logout()
                //执行登出路径
                .logoutUrl("/logout")
                //登出成功后转发页面
                .logoutSuccessHandler(new LogoutSuccessHandler() {
                    @Override
                    public void onLogoutSuccess(HttpServletRequest request, HttpServletResponse response, Authentication authentication) throws IOException, ServletException {
                        response.setContentType("application/json;charset=UTF-8");
                        String message = "登出成功";
                        PrintWriter printWriter = response.getWriter();
                        printWriter.write(message);
                        printWriter.flush();
                        printWriter.close();
                    }
                })

登陆成功和失败处理器

    @Bean
    public UsernamePasswordAuthenticationFilter usernamePasswordAuthenticationFilter() throws Exception {
        UsernamePasswordAuthenticationFilter filter = new MyUsernamePasswordAuthenticationFilter();

        filter.setAuthenticationManager(authenticationManagerBean());
        filter.setAuthenticationSuccessHandler(new AuthenticationSuccessHandler() {
            @Override
            public void onAuthenticationSuccess(HttpServletRequest request, HttpServletResponse response, Authentication authentication) throws IOException, ServletException {
                response.setContentType("application/json;charset=UTF-8");
                String message = "登录成功";
                PrintWriter printWriter = response.getWriter();
                printWriter.write(message);
                printWriter.flush();
                printWriter.close();
            }
        });
        filter.setAuthenticationFailureHandler(new AuthenticationFailureHandler() {
            @Override
            public void onAuthenticationFailure(HttpServletRequest request, HttpServletResponse response, AuthenticationException exception) throws IOException, ServletException {
                response.setContentType("application/json;charset=UTF-8");
                String message = "登录失败";
                PrintWriter printWriter = response.getWriter();
                printWriter.write(message);
                printWriter.flush();
                printWriter.close();
            }
        });
        filter.setFilterProcessesUrl("/newlogin");
        return filter;
    }

未登录账号处理

http.addFilterAt(usernamePasswordAuthenticationFilter(),UsernamePasswordAuthenticationFilter.class)
        .exceptionHandling()
        .authenticationEntryPoint(new AuthenticationEntryPoint() {
            @Override
            public void commence(HttpServletRequest request, HttpServletResponse response, AuthenticationException authException) throws IOException, ServletException {
                response.setContentType("application/json;charset=UTF-8");
                String message = "请先进行登录";
                PrintWriter printWriter = response.getWriter();
                printWriter.write(message);
                printWriter.flush();
                printWriter.close();
            }
        })
        ;

原文链接：https://blog.csdn.net/weixin_44046865/article/details/115428430