使用Spring Rest模板在服务上传播HTTP标头（JWT令牌）
问题内容：
我有一个微服务架构，它们都由Spring Security和JWT令牌保护。
因此，当我调用第一个微服务时，我想获取JWT令牌并使用这些凭据将请求发送到另一个服务。
如何获取令牌并再次发送给其他服务？
问题答案：
我已经完成了任务，创建了一个自定义过滤器
public class RequestFilter implements Filter{
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
HttpServletRequest httpServletRequest = (HttpServletRequest) request;
String token = httpServletRequest.getHeader(RequestContext.REQUEST_HEADER_NAME);
if (token == null || "".equals(token)) {
throw new IllegalArgumentException("Can't retrieve JWT Token");
}
RequestContext.getContext().setToken(token);
chain.doFilter(request, response);
}
@Override
public void destroy() { }
@Override
public void init(FilterConfig arg0) throws ServletException {}
}
然后，在我的配置中进行设置
@Bean
public FilterRegistrationBean getPeticionFilter() {
FilterRegistrationBean registration = new FilterRegistrationBean();
registration.setFilter(new RequestFilter());
registration.addUrlPatterns("/*");
registration.setName("requestFilter");
return registration;
}
考虑到这一点，我创建了另一个带有ThreadLocal变量的类，以将JWT令牌从Controller传递到Rest Templace拦截器
public class RequestContext {
public static final String REQUEST_HEADER_NAME = "Authorization";
private static final ThreadLocal<RequestContext> CONTEXT = new ThreadLocal<>();
private String token;
public static RequestContext getContext() {
RequestContext result = CONTEXT.get();
if (result == null) {
result = new RequestContext();
CONTEXT.set(result);
}
return result;
}
public String getToken() {
return token;
}
public void setToken(String token) {
this.token = token;
}
}
public class RestTemplateInterceptor implements ClientHttpRequestInterceptor{
@Override
public ClientHttpResponse intercept(HttpRequest request, byte[] body, ClientHttpRequestExecution execution) throws IOException {
String token = RequestContext.getContext().getToken();
request.getHeaders().add(RequestContext.REQUEST_HEADER_NAME, token);
return execution.execute(request, body);
}
}
将拦截器添加到配置
@PostConstruct
public void addInterceptors() {
List<ClientHttpRequestInterceptor> interceptors = restTemplate.getInterceptors();
interceptors.add(new RestTemplateInterceptor());
restTemplate.setInterceptors(interceptors);
}
