我假设您正在尝试实现某种基于 jwt 令牌的 OAuth 安全性。
现在有几种方法可以做到这一点，但这是我最喜欢的一种：
这是过滤器的样子：
import java.io.IOException;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import org.springframework.web.filter.GenericFilterBean;
import io.jsonwebtoken.Claims;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureException;
public class JwtFilter extends GenericFilterBean {
@Override
public void doFilter(final ServletRequest req,
final ServletResponse res,
final FilterChain chain) throws IOException, ServletException {
final HttpServletRequest request = (HttpServletRequest) req;
final String authHeader = request.getHeader("Authorization");
if (authHeader == null || !authHeader.startsWith("Bearer ")) {
throw new ServletException("Missing or invalid Authorization header.");
}
final String token = authHeader.substring(7); // The part after "Bearer "
try {
final Claims claims = Jwts.parser().setSigningKey("secretkey")
.parseClaimsJws(token).getBody();
request.setAttribute("claims", claims);
}
catch (final SignatureException e) {
throw new ServletException("Invalid token.");
}
chain.doFilter(req, res);
}
}
很简单，用户控制器也可以在其中找到登录方法：
import java.util.Arrays;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.servlet.ServletException;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;
@RestController
@RequestMapping("/user")
public class UserController {
private final Map<String, List<String>> userDb = new HashMap<>();
public UserController() {
userDb.put("tom", Arrays.asList("user"));
userDb.put("sally", Arrays.asList("user", "admin"));
}
@RequestMapping(value = "login", method = RequestMethod.POST)
public LoginResponse login(@RequestBody final UserLogin login)
throws ServletException {
if (login.name == null || !userDb.containsKey(login.name)) {
throw new ServletException("Invalid login");
}
return new LoginResponse(Jwts.builder().setSubject(login.name)
.claim("roles", userDb.get(login.name)).setIssuedAt(new Date())
.signWith(SignatureAlgorithm.HS256, "secretkey").compact());
}
@SuppressWarnings("unused")
private static class UserLogin {
public String name;
public String password;
}
@SuppressWarnings("unused")
private static class LoginResponse {
public String token;
public LoginResponse(final String token) {
this.token = token;
}
}
}
当然，我们有 Main，您可以在其中看到过滤器 bean：
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.context.embedded.FilterRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
@EnableAutoConfiguration
@ComponentScan
@Configuration
public class WebApplication {
@Bean
public FilterRegistrationBean jwtFilter() {
final FilterRegistrationBean registrationBean = new FilterRegistrationBean();
registrationBean.setFilter(new JwtFilter());
registrationBean.addUrlPatterns("/api/*");
return registrationBean;
}
public static void main(final String[] args) throws Exception {
SpringApplication.run(WebApplication.class, args);
}
}
最后但并非最不重要的还有一个示例控制器：
import io.jsonwebtoken.Claims;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
@RestController
@RequestMapping("/api")
public class ApiController {
@SuppressWarnings("unchecked")
@RequestMapping(value = "role/{role}", method = RequestMethod.GET)
public Boolean login(@PathVariable final String role,
final HttpServletRequest request) throws ServletException {
final Claims claims = (Claims) request.getAttribute("claims");
return ((List<String>) claims.get("roles")).contains(role);
}
}
Here 是一个指向 GitHub 的链接，感谢 nielsutrecht 所做的出色工作，我以这个项目为基础，它运行良好。