Example usage for org.springframework.http HttpHeaders setAccessControlExposeHeaders

Introduction

In this page you can find the example usage for org.springframework.http HttpHeaders setAccessControlExposeHeaders.

Prototype

public void setAccessControlExposeHeaders(List<String> exposedHeaders) 

Source Link

Document

Set the (new) value of the Access-Control-Expose-Headers response header.

Usage

From source file:org.springframework.web.cors.DefaultCorsProcessor.java

/**
 * Handle the given request./*  ww  w . j av a  2  s  . co  m*/
 */
protected boolean handleInternal(ServerHttpRequest request, ServerHttpResponse response,
        CorsConfiguration config, boolean preFlightRequest) throws IOException {

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

    responseHeaders.addAll(HttpHeaders.VARY, Arrays.asList(HttpHeaders.ORIGIN,
            HttpHeaders.ACCESS_CONTROL_REQUEST_METHOD, HttpHeaders.ACCESS_CONTROL_REQUEST_HEADERS));

    if (allowOrigin == null) {
        logger.debug("Rejecting CORS request because '" + requestOrigin + "' origin is not allowed");
        rejectRequest(response);
        return false;
    }

    HttpMethod requestMethod = getMethodToUse(request, preFlightRequest);
    List<HttpMethod> allowMethods = checkMethods(config, requestMethod);
    if (allowMethods == null) {
        logger.debug("Rejecting CORS request because '" + requestMethod + "' request method is not allowed");
        rejectRequest(response);
        return false;
    }

    List<String> requestHeaders = getHeadersToUse(request, preFlightRequest);
    List<String> allowHeaders = checkHeaders(config, requestHeaders);
    if (preFlightRequest && allowHeaders == null) {
        logger.debug("Rejecting CORS request because '" + requestHeaders + "' request headers are not allowed");
        rejectRequest(response);
        return false;
    }

    responseHeaders.setAccessControlAllowOrigin(allowOrigin);

    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;
}

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From source file:org.springframework.web.cors.reactive.DefaultCorsProcessor.java

/**
 * Handle the given request.//from ww w  .jav  a2s . co  m
 */
protected boolean handleInternal(ServerWebExchange exchange, CorsConfiguration config,
        boolean preFlightRequest) {

    ServerHttpRequest request = exchange.getRequest();
    ServerHttpResponse response = exchange.getResponse();
    HttpHeaders responseHeaders = response.getHeaders();

    response.getHeaders().addAll(HttpHeaders.VARY, Arrays.asList(HttpHeaders.ORIGIN,
            HttpHeaders.ACCESS_CONTROL_REQUEST_METHOD, HttpHeaders.ACCESS_CONTROL_REQUEST_HEADERS));

    String requestOrigin = request.getHeaders().getOrigin();
    String allowOrigin = checkOrigin(config, requestOrigin);
    if (allowOrigin == null) {
        logger.debug("Rejecting CORS request because '" + requestOrigin + "' origin is not allowed");
        rejectRequest(response);
        return false;
    }

    HttpMethod requestMethod = getMethodToUse(request, preFlightRequest);
    List<HttpMethod> allowMethods = checkMethods(config, requestMethod);
    if (allowMethods == null) {
        logger.debug("Rejecting CORS request because '" + requestMethod + "' request method is not allowed");
        rejectRequest(response);
        return false;
    }

    List<String> requestHeaders = getHeadersToUse(request, preFlightRequest);
    List<String> allowHeaders = checkHeaders(config, requestHeaders);
    if (preFlightRequest && allowHeaders == null) {
        logger.debug("Rejecting CORS request because '" + requestHeaders + "' request headers are not allowed");
        rejectRequest(response);
        return false;
    }

    responseHeaders.setAccessControlAllowOrigin(allowOrigin);

    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());
    }

    return true;
}

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