Spring Cloud Gateway CORS

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Java

Kotlin

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@Configuration
class RouteConfiguration {

    @Bean
    fun allowCORS(): WebFilter {
        return WebFilter { webExchange, chains ->
            val request = webExchange.request
            val requestHeaders = request.headers
            val response = webExchange.response
            val respHeaders = response.headers

            respHeaders.add(HttpHeaders.ACCESS_CONTROL_ALLOW_ORIGIN, "*")
            respHeaders.add(HttpHeaders.ACCESS_CONTROL_ALLOW_METHODS, "*")
            respHeaders.add(HttpHeaders.ACCESS_CONTROL_MAX_AGE, MAX_AGE)
            respHeaders.addAll(HttpHeaders.ACCESS_CONTROL_ALLOW_HEADERS, requestHeaders.accessControlRequestHeaders)
            respHeaders.add(HttpHeaders.ACCESS_CONTROL_EXPOSE_HEADERS, "*")
            respHeaders.add(HttpHeaders.ACCESS_CONTROL_ALLOW_CREDENTIALS, "true")

            if (request.method == HttpMethod.OPTIONS) {
                response.statusCode = HttpStatus.OK
                Mono.empty()
            } else {
                chains.filter(webExchange)
            }
        }
    }

    companion object {
        const val MAX_AGE = "18000L"
    }
}

Refer

http://springcloud.cn/view/343