解决跨域请求,NG返回403(403并不一定是NG问题)

//对CorsConfiguration属性赋值
private CorsConfiguration corsConfig(Map.Entry<String, JawsCorsConfig> entry) {
    CorsConfiguration corsConfiguration = new CorsConfiguration();
    corsConfiguration.setAllowedOrigins(Splitter.on(",").splitToList(entry.getValue().getAllowedOrigins()));
    corsConfiguration.setAllowedHeaders(Splitter.on(",").splitToList(entry.getValue().getAllowedHeaders()));
    corsConfiguration.setAllowedMethods(Splitter.on(",").splitToList(entry.getValue().getAllowedMethods()));
    corsConfiguration.setAllowCredentials(entry.getValue().getAllowCredentials());
    corsConfiguration.setMaxAge(entry.getValue().getMaxAge());
    return corsConfiguration;
}

@Bean
    public CorsFilter corsFilter() {
    UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
    for (Map.Entry<String, JawsCorsConfig> entry : jawsZuulProperites.getCors().entrySet()) {
        source.registerCorsConfiguration(entry.getValue().getUrls(), corsConfig(entry));
    }
    return new CorsFilter(source);
}

protected boolean handleInternal(ServerHttpRequest request, ServerHttpResponse response,
			CorsConfiguration config, boolean preFlightRequest) throws IOException {

		String requestOrigin = request.getHeaders().getOrigin();
		String allowOrigin = checkOrigin(config, requestOrigin);

		HttpMethod requestMethod = getMethodToUse(request, preFlightRequest);
		List<HttpMethod> allowMethods = checkMethods(config, requestMethod);

		List<String> requestHeaders = getHeadersToUse(request, preFlightRequest);
		List<String> allowHeaders = checkHeaders(config, requestHeaders);

		if (allowOrigin == null || allowMethods == null || (preFlightRequest && allowHeaders == null)) {
			rejectRequest(response);
			return false;
		}

		HttpHeaders responseHeaders = response.getHeaders();
		responseHeaders.setAccessControlAllowOrigin(allowOrigin);
		responseHeaders.add(HttpHeaders.VARY, HttpHeaders.ORIGIN);

		if (preFlightRequest) {
			responseHeaders.setAccessControlAllowMethods(allowMethods);
		}

		if (preFlightRequest && !allowHeaders.isEmpty()) {
			responseHeaders.setAccessControlAllowHeaders(allowHeaders);
		}

		if (!CollectionUtils.isEmpty(config.getExposedHeaders())) {
			responseHeaders.setAccessControlExposeHeaders(config.getExposedHeaders());
		}

		if (Boolean.TRUE.equals(config.getAllowCredentials())) {
			responseHeaders.setAccessControlAllowCredentials(true);
		}

		if (preFlightRequest && config.getMaxAge() != null) {
			responseHeaders.setAccessControlMaxAge(config.getMaxAge());
		}

		response.flush();
		return true;
	}
	

	public static final String ALL = "*";
	/**
	 * Check the origin of the request against the configured allowed origins.
	 * @param requestOrigin the origin to check
	 * @return the origin to use for the response, or {@code null} which
	 * means the request origin is not allowed
	 */
	public String checkOrigin(String requestOrigin) {
		if (!StringUtils.hasText(requestOrigin)) {
			return null;
		}
		if (ObjectUtils.isEmpty(this.allowedOrigins)) {
			return null;
		}

		if (this.allowedOrigins.contains(ALL)) {
			if (this.allowCredentials != Boolean.TRUE) {
				return ALL;
			}
			else {
				return requestOrigin;
			}
		}
//遍历我们赋值的allowedOrigins，判断请求来源是否包含，包含则返回
		for (String allowedOrigin : this.allowedOrigins) {
			if (requestOrigin.equalsIgnoreCase(allowedOrigin)) {
				return requestOrigin;
			}
		}
return null;
}