save(jobId: number,taskId: number,note: Note) {
 
   return this.http.post(environment.APIENDPOINT + '/jobs/' + jobId + '/tasks/' + taskId + '/notes',note,this.setHeaders()).map((response: Response) => response.json());
 
}

private setHeaders() {
        // create authorization header with jwt token
        let currentUser = JSON.parse(localStorage.getItem('currentUser'));
        console.log("Current token---"+ currentUser.token);
        if (currentUser && currentUser.token) {
 
  let headers = new Headers();
  headers.append('Content-Type','application/json');
  headers.append('authorization','Bearer '+ currentUser.token);
            
   let r = new RequestOptions({ headers: headers })
   return r;
 
        }
    }

但是在服务器端它返回状态码401.问题是在Springboot端它检查授权头如下,它返回null

String authToken = request.getHeader("authorization ");

然后我查看了请求标头,它在Access-Control-Request-Headers下有如下的授权标头.但它对服务器端是不可见的.

然后我进一步阅读并发现这可能是CORS配置的问题.所以我修改了我的CORS配置过滤器以使addExposedHeader如下所示

@Bean
public CorsFilter corsFilter() {
    UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
    CorsConfiguration config = new CorsConfiguration();
    config.setAllowCredentials(true);
    config.addAllowedOrigin("*");
    config.addAllowedHeader("*");
    config.addExposedHeader("authorization");
    config.addAllowedMethod("OPTIONS");
    config.addAllowedMethod("GET");
    config.addAllowedMethod("POST");
    config.addAllowedMethod("PUT");
    config.addAllowedMethod("DELETE");
 
    //config.addExposedHeader("Content-Type");
    source.registerCorsConfiguration("/**",config);
    return new CorsFilter(source);
}

服务器仍然抱怨它无法找到Authorization标头.我在这里错过了什么吗？感谢你的帮助

解

在阅读下面的sideshowbarker评论后,我能够理解这个问题背后的基础知识.
在我的项目中,我有一个JWT令牌过滤器,在里面它始终检查Authorization标头.然后我将其修改如下,现在它按预期工作

protected void doFilterInternal(HttpServletRequest request,HttpServletResponse response,FilterChain chain) throws ServletException,IOException {
try {
 
    if ("OPTIONS".equalsIgnoreCase(request.getMethod())) {
        response.setStatus(HttpServletResponse.SC_OK);
    }else{
        String authToken = request.getHeader(this.tokenHeader);
        jWTTokenAuthenticationService.parseClaimsFromToken(authToken);
        --
    }
    chain.doFilter(request,response);
}Catch(AuthenticationException authEx){
    SecurityContextHolder.clearContext();
    if (entryPoint != null) {
        entryPoint.commence(request,response,authEx);
    }
}

}