Swagger整合Jwt授权配置

Swagger整合Jwt授权配置

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一、Swagger入门

1、什么是Swagger

Swagger 是一个规范和完整的框架，用于生成、描述、调用和可视化 RESTful 风格的 Web 服务，它有着如下的优点：

1）及时性 (接口变更后，能够及时准确地通知相关前后端开发人员)

2）规范性 (并且保证接口的规范性，如接口的地址，请求方式，参数及响应格式和错误信息)

3）一致性 (接口信息一致，不会出现因开发人员拿到的文档版本不一致，而出现分歧)

4）可测性 (直接在接口文档上进行测试，以方便理解业务)

2、Swagger生成文档

1）添加pom.xml依赖

<!--swagger-->
<dependency>
	<groupId>io.springfox</groupId>
	<artifactId>springfox-swagger2</artifactId>
	<version>2.7.0</version>
</dependency>
<dependency>
	<groupId>io.springfox</groupId>
	<artifactId>springfox-swagger-ui</artifactId>
	<version>2.7.0</version>
</dependency>

2）创建swagger配置文件

@Configuration
@EnableSwagger2
public class Swagger2Config {

    @Bean
    public Docket apiConfig() {
        //创建基于Swagger2的配置文件
        return new Docket(DocumentationType.SWAGGER_2)
                // 调用apiInfo方法,创建一个ApiInfo实例,里面是展示在文档页面信息内容
                .apiInfo(apiInfo());
    }
    private ApiInfo apiInfo() {
        return new ApiInfoBuilder()
                //标题
                .title("接口文档")
                //描述
                .description("接口文档")
                //版本
                .version("1.0")
                //作者信息
                .contact(new Contact("java大师", "http://localhost:8081", "xxx@qq.com"))
                .build();
    }
}

3）启动程序

访问路径：http://localhost:8081/swagger-ui.html ，出现生成的文档页面。

此为原生界面，很难看，所以我们需要引入swagger-bootstrap-ui，也就是Knife4j的前身

4）使用Knife4j

a）添加pom.xml依赖

<dependency>
	<groupId>com.github.xiaoymin</groupId>
	<artifactId>knife4j-spring-boot-starter</artifactId>
	<version>2.0.7</version>
</dependency>

b）开启Swagger2配置

import java.util.ArrayList;
import java.util.List;

@Configuration
@EnableSwagger2
public class Swagger2Config {
    @Bean
    public Docket createRestApi() {
        return new Docket(DocumentationType.SWAGGER_2)
                .pathMapping("/")
                .apiInfo(apiInfo())
                .select()
                //swagger要扫描的包路径
                .apis(RequestHandlerSelectors.basePackage("com.dsblog.server.controller"))
                .paths(PathSelectors.any())
                .build()
    }

    private ApiInfo apiInfo() {
        return new ApiInfoBuilder().title("dsblog接口文档")
                .contact(new Contact("java大师","http://localhost:8081/doc.html","fry000@qq.com"))
                .version("1.0").description("dsblog接口文档").build();
    }

b）重启服务

访问地址：http://localhost:8081/doc.html，这个ui界面看起来就更美观，更符合国人的使用习惯

二、Swagger整合Jwt

1、添加pom.xml依赖

<?xml version="1.0" encoding="UTF-8"?>

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <parent>
    <groupId>com.dsblog</groupId>
    <artifactId>dsblog</artifactId>
    <version>0.0.1-SNAPSHOT</version>
  </parent>

  <groupId>com.dsblog</groupId>
  <artifactId>dsblog-server</artifactId>
  <version>0.0.1-SNAPSHOT</version>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>
  </properties>

  <dependencies>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
      <groupId>org.projectlombok</groupId>
      <artifactId>lombok</artifactId>
      <optional>true</optional>
    </dependency>
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <scope>runtime</scope>
    </dependency>
    <dependency>
      <groupId>com.baomidou</groupId>
      <artifactId>mybatis-plus-boot-starter</artifactId>
      <version>3.4.0</version>
    </dependency>
    <dependency>
      <groupId>org.freemarker</groupId>
      <artifactId>freemarker</artifactId>
      <version>2.3.31</version>
    </dependency>
    <dependency>
      <groupId>com.baomidou</groupId>
      <artifactId>mybatis-plus-generator</artifactId>
      <version>3.3.2</version>
    </dependency>
    <dependency>
      <groupId>io.swagger</groupId>
      <artifactId>swagger-annotations</artifactId>
      <version>1.5.20</version>
    </dependency>
    <!--swagger-->
    <dependency>
      <groupId>io.springfox</groupId>
      <artifactId>springfox-swagger2</artifactId>
      <version>2.7.0</version>
    </dependency>
    <dependency>
      <groupId>io.springfox</groupId>
      <artifactId>springfox-swagger-ui</artifactId>
      <version>2.7.0</version>
    </dependency>
    <dependency>
      <groupId>com.github.xiaoymin</groupId>
      <artifactId>knife4j-spring-boot-starter</artifactId>
      <version>2.0.7</version>
    </dependency>
    <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-security</artifactId>
      <version>2.3.6.RELEASE</version>
    </dependency>
    <dependency>
      <groupId>io.jsonwebtoken</groupId>
      <artifactId>jjwt</artifactId>
      <version>0.9.1</version>
    </dependency>
  </dependencies>
</project>

2、创建Swagger2Config配置文件

package com.dsblog.server.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import springfox.documentation.builders.ApiInfoBuilder;
import springfox.documentation.builders.PathSelectors;
import springfox.documentation.builders.RequestHandlerSelectors;
import springfox.documentation.service.*;
import springfox.documentation.spi.DocumentationType;
import springfox.documentation.spi.service.contexts.SecurityContext;
import springfox.documentation.spring.web.plugins.Docket;
import springfox.documentation.swagger2.annotations.EnableSwagger2;

import java.util.ArrayList;
import java.util.List;

@Configuration
@EnableSwagger2
public class Swagger2Config {
    @Bean
    public Docket createRestApi() {
        return new Docket(DocumentationType.SWAGGER_2)
                .pathMapping("/")
                .apiInfo(apiInfo())
                .select()
                //swagger要扫描的包路径
                .apis(RequestHandlerSelectors.basePackage("com.dsblog.server.controller"))
                .paths(PathSelectors.any())
                .build()
                .securityContexts(securityContexts())
                .securitySchemes(securitySchemes());
    }

    private ApiInfo apiInfo() {
        return new ApiInfoBuilder().title("dsblog接口文档")
                .contact(new Contact("java大师","http://localhost:8081/doc.html","fry000@qq.com"))
                .version("1.0").description("dsblog接口文档").build();
    }

    private List<SecurityContext> securityContexts() {
        //设置需要登录认证的路径
        List<SecurityContext> result = new ArrayList<>();
        result.add(getContextByPath("/.*"));
        return result;
    }

  //通过pathRegex获取SecurityContext对象
    private SecurityContext getContextByPath(String pathRegex) {
        return SecurityContext.builder()
                .securityReferences(defaultAuth())
                .forPaths(PathSelectors.regex(pathRegex))
                .build();
    }

  	//默认为全局的SecurityReference对象
    private List<SecurityReference> defaultAuth() {
        List<SecurityReference> result = new ArrayList<>();
        AuthorizationScope authorizationScope = new AuthorizationScope("global",
                "accessEverything");
        AuthorizationScope[] authorizationScopes = new AuthorizationScope[1];
        authorizationScopes[0] = authorizationScope;
        result.add(new SecurityReference("Authorization", authorizationScopes));
        return result;
    }

    private List<ApiKey> securitySchemes() {
        //设置请求头信息
        List<ApiKey> result = new ArrayList<>();
        ApiKey apiKey = new ApiKey("Authorization", "Authorization", "header");
        result.add(apiKey);
        return result;
    }
}

3、创建SecurityConfig配置文件

package com.dsblog.server.config.security;

import com.dsblog.server.model.User;
import com.dsblog.server.service.IUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.builders.WebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.config.http.SessionCreationPolicy;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;

@Configuration
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    @Autowired
    private IUserService userService;
    @Autowired
    private RestAuthorizationEntryPoint restAuthorizationEntryPoint;
    @Autowired
    private RestAccessDeniedHandler restAccessDeniedHandler;

    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.userDetailsService(userDetailsService()).passwordEncoder(passwordEncoder());
    }

  	//主要的配置文件，antMatchers匹配的路径，全部忽略，不进行JwtToken的认证
    @Override
    public void configure(WebSecurity web) throws Exception {
        web.ignoring().antMatchers(
                "/login",
                "/logout",
                "/css/**",
                "/js/**",
                "/index.html",
                "favicon.ico",
                "/doc.html",
                "/webjars/**",
                "/swagger-resources/**",
                "/v2/api-docs/**"
        );
    }

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.csrf().disable()
                .sessionManagement()
                .sessionCreationPolicy(SessionCreationPolicy.STATELESS)
                .and()
                .authorizeRequests()
                .anyRequest().authenticated()
                .and()
                .headers()
                .cacheControl();
        //添加Jwt登录授权拦截器
        http.addFilterBefore(jwtAuthenticationTokenFilter(), UsernamePasswordAuthenticationFilter.class);
        //添加未登录和未授权结果返回
        http.exceptionHandling()
                .accessDeniedHandler(restAccessDeniedHandler)
                .authenticationEntryPoint(restAuthorizationEntryPoint);
    }

    @Override
    @Bean
    public UserDetailsService userDetailsService(){
        return username -> {
            User user = userService.getUserByUsername(username);
            if(null!=user){
                return user;
            }
            return null;
        };
    }

    @Bean
    public PasswordEncoder passwordEncoder(){
        return new BCryptPasswordEncoder();
    }

    @Bean
    public  JwtAuthenticationTokenFilter jwtAuthenticationTokenFilter(){
        return new JwtAuthenticationTokenFilter();
    }
}

4、创建测试Controller，其中/login登录和/logout退出方法不需要Authorize验证，和上面的重写方法configure(WebSecurity web）匹配，user/info方法需要Authorize验证才能进行访问

package com.dsblog.server.controller;

import com.dsblog.server.model.ResultBean;
import com.dsblog.server.model.User;
import com.dsblog.server.model.UserLoginParam;
import com.dsblog.server.service.IUserService;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RestController;

import javax.servlet.http.HttpServletRequest;
import java.security.Principal;

@Api(tags = "LoginController")
@RestController
public class LoginController {

    @Autowired
    private IUserService userService;

    @ApiOperation("登录")
    @PostMapping("/login")
    public ResultBean login(@RequestBody UserLoginParam userLoginParam, HttpServletRequest request){
        return userService.login(userLoginParam.getUsername(),userLoginParam.getPassword(),request);
    }

    @ApiOperation("退出")
    @PostMapping("/logout")
    public ResultBean logout(){
        return ResultBean.success("退出成功！");
    }

    @ApiOperation("获取当前登录用户")
    @GetMapping("/user/info")
    public User getUserInfo(Principal principal){
        if(null == principal){
            return null;
        }
        String username = principal.getName();
        User user = userService.getUserByUsername(username);
        user.setPassword(null);
        return user;
    }
}

5、重启程序，输入http://localhost:8081/doc.html

6、测试

1）首先调用/user/info，会看到提示未登录，请先登录。需要登录授权才能够进行方法的测试

2）接着调用登录请求，输入用户名和密码获取JwtToken

3）获取token后，监测网络，发现会将Authorization放入请求头部发送到后台

4）Authorize加入Bearer和JwtToken

5）携带token发送到后台获取用户信息，验证通过