Spring Security 使用 JSON 登录

首先创建 SpringBoot 工程，添加 SpringSecurity 依赖，如下：

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

如果想将用户名密码通过 JSON 的方式进行传递，则需要自定义相关过滤器，通过分析源码我们发现，默认的用户名密码提取在 UsernamePasswordAuthenticationFilter 过滤器中，部分源码如下：

public class UsernamePasswordAuthenticationFilter extends
		AbstractAuthenticationProcessingFilter {
	public static final String SPRING_SECURITY_FORM_USERNAME_KEY = "username";
	public static final String SPRING_SECURITY_FORM_PASSWORD_KEY = "password";
 
	private String usernameParameter = SPRING_SECURITY_FORM_USERNAME_KEY;
	private String passwordParameter = SPRING_SECURITY_FORM_PASSWORD_KEY;
	private boolean postOnly = true;
	public UsernamePasswordAuthenticationFilter() {
		super(new AntPathRequestMatcher("/login", "POST"));
	}
 
	public Authentication attemptAuthentication(HttpServletRequest request,
			HttpServletResponse response) throws AuthenticationException {
		if (postOnly && !request.getMethod().equals("POST")) {
			throw new AuthenticationServiceException(
					"Authentication method not supported: " + request.getMethod());
		}
 
		String username = obtainUsername(request);
		String password = obtainPassword(request);
 
		if (username == null) {
			username = "";
		}
 
		if (password == null) {
			password = "";
		}
 
		username = username.trim();
 
		UsernamePasswordAuthenticationToken authRequest = new UsernamePasswordAuthenticationToken(
				username, password);
 
		// Allow subclasses to set the "details" property
		setDetails(request, authRequest);
 
		return this.getAuthenticationManager().authenticate(authRequest);
	}
 
	protected String obtainPassword(HttpServletRequest request) {
		return request.getParameter(passwordParameter);
	}
 
	protected String obtainUsername(HttpServletRequest request) {
		return request.getParameter(usernameParameter);
	}
    //...
    //...
}

从这里可以看到，默认的用户名/密码提取就是通过 request 中的 getParameter 来提取的，如果想使用 JSON 传递用户名密码，只需要将这个过滤器替换掉即可，自定义过滤器如下：

public class CustomAuthenticationFilter extends UsernamePasswordAuthenticationFilter {
    @Override
    public Authentication attemptAuthentication(HttpServletRequest request, HttpServletResponse response) throws AuthenticationException {
        if (request.getContentType().equals(MediaType.APPLICATION_JSON_UTF8_VALUE)
                || request.getContentType().equals(MediaType.APPLICATION_JSON_VALUE)) {
            ObjectMapper mapper = new ObjectMapper();
            UsernamePasswordAuthenticationToken authRequest = null;
            try (InputStream is = request.getInputStream()) {
                Map<String,String> authenticationBean = mapper.readValue(is, Map.class);
                authRequest = new UsernamePasswordAuthenticationToken(
                        authenticationBean.get("username"), authenticationBean.get("password"));
            } catch (IOException e) {
                e.printStackTrace();
                authRequest = new UsernamePasswordAuthenticationToken(
                        "", "");
            } finally {
                setDetails(request, authRequest);
                return this.getAuthenticationManager().authenticate(authRequest);
            }
        }
        else {
            return super.attemptAuthentication(request, response);
        }
    }
}

这里只是将用户名/密码的获取方案重新修正下，改为了从 JSON 中获取用户名密码，然后在 SecurityConfig 中作出如下修改：

@Override
protected void configure(HttpSecurity http) throws Exception {
    http.authorizeRequests().anyRequest().authenticated()
            .and()
            .formLogin()
            .and().csrf().disable();
    http.addFilterAt(customAuthenticationFilter(), UsernamePasswordAuthenticationFilter.class);
}
@Bean
CustomAuthenticationFilter customAuthenticationFilter() throws Exception {
    CustomAuthenticationFilter filter = new CustomAuthenticationFilter();
    filter.setAuthenticationSuccessHandler(new AuthenticationSuccessHandler() {
        @Override
        public void onAuthenticationSuccess(HttpServletRequest req, HttpServletResponse resp, Authentication authentication) throws IOException, ServletException {
            resp.setContentType("application/json;charset=utf-8");
            PrintWriter out = resp.getWriter();
            RespBean respBean = RespBean.ok("登录成功!");
            out.write(new ObjectMapper().writeValueAsString(respBean));
            out.flush();
            out.close();
        }
    });
    filter.setAuthenticationFailureHandler(new AuthenticationFailureHandler() {
        @Override
        public void onAuthenticationFailure(HttpServletRequest req, HttpServletResponse resp, AuthenticationException e) throws IOException, ServletException {
            resp.setContentType("application/json;charset=utf-8");
            PrintWriter out = resp.getWriter();
            RespBean respBean = RespBean.error("登录失败!");
            out.write(new ObjectMapper().writeValueAsString(respBean));
            out.flush();
            out.close();
        }
    });
    filter.setAuthenticationManager(authenticationManagerBean());
    return filter;
}

将自定义的 CustomAuthenticationFilter 类加入进来即可，接下来就可以使用 JSON 进行登录了，如下：

Spring Security 使用 JSON 登录

FEATURED TAGS

FRIENDS