Examples with MethodStats org.wso2.carbon.apimgt.gateway.MethodStats used on opensource projects

Example 26 with MethodStats

use of org.wso2.carbon.apimgt.gateway.MethodStats in project carbon-apimgt by wso2.

the class CORSRequestHandler method handleRequest.

@MethodStats
public boolean handleRequest(MessageContext messageContext) {
    Timer.Context context = startMetricTimer();
    TracingSpan CORSRequestHandlerSpan = null;
    if (Util.tracingEnabled()) {
        TracingSpan responseLatencySpan = (TracingSpan) messageContext.getProperty(APIMgtGatewayConstants.RESOURCE_SPAN);
        TracingTracer tracer = Util.getGlobalTracer();
        CORSRequestHandlerSpan = Util.startSpan(APIMgtGatewayConstants.CORS_REQUEST_HANDLER, responseLatencySpan, tracer);
    }
    if (Utils.isGraphQLSubscriptionRequest(messageContext)) {
        if (log.isDebugEnabled()) {
            log.debug("Skipping GraphQL subscription handshake request.");
        }
        return true;
    }
    try {
        if (!initializeHeaderValues) {
            initializeHeaders();
        }
        String apiContext = (String) messageContext.getProperty(RESTConstants.REST_API_CONTEXT);
        String apiVersion = (String) messageContext.getProperty(RESTConstants.SYNAPSE_REST_API_VERSION);
        String httpMethod = (String) ((Axis2MessageContext) messageContext).getAxis2MessageContext().getProperty(Constants.Configuration.HTTP_METHOD);
        API selectedApi = Utils.getSelectedAPI(messageContext);
        org.apache.axis2.context.MessageContext axis2MC = ((Axis2MessageContext) messageContext).getAxis2MessageContext();
        Map headers = (Map) axis2MC.getProperty(org.apache.axis2.context.MessageContext.TRANSPORT_HEADERS);
        String corsRequestMethod = (String) headers.get(APIConstants.CORSHeaders.ACCESS_CONTROL_REQUEST_METHOD);
        Resource selectedResource = null;
        Utils.setSubRequestPath(selectedApi, messageContext);
        if (selectedApi != null) {
            Resource[] allAPIResources = selectedApi.getResources();
            Set<Resource> acceptableResources = new LinkedHashSet<>();
            for (Resource resource : allAPIResources) {
                // If the requesting method is OPTIONS or if the Resource contains the requesting method
                if ((RESTConstants.METHOD_OPTIONS.equals(httpMethod) && resource.getMethods() != null && Arrays.asList(resource.getMethods()).contains(corsRequestMethod)) || (resource.getMethods() != null && Arrays.asList(resource.getMethods()).contains(httpMethod))) {
                    acceptableResources.add(resource);
                }
            }
            if (!acceptableResources.isEmpty()) {
                for (RESTDispatcher dispatcher : RESTUtils.getDispatchers()) {
                    Resource resource = dispatcher.findResource(messageContext, acceptableResources);
                    if (resource != null) {
                        selectedResource = resource;
                        break;
                    }
                }
                if (selectedResource == null) {
                    handleResourceNotFound(messageContext, Arrays.asList(allAPIResources));
                    return false;
                }
            } else // If no acceptable resources are found
            {
                // We're going to send a 405 or a 404. Run the following logic to determine which.
                handleResourceNotFound(messageContext, Arrays.asList(allAPIResources));
                return false;
            }
            // No matching resource found
            if (selectedResource == null) {
                // Respond with a 404
                onResourceNotFoundError(messageContext, HttpStatus.SC_NOT_FOUND, APIMgtGatewayConstants.RESOURCE_NOT_FOUND_ERROR_MSG);
                return false;
            }
        }
        String resourceString = selectedResource.getDispatcherHelper().getString();
        String resourceCacheKey = APIUtil.getResourceInfoDTOCacheKey(apiContext, apiVersion, resourceString, httpMethod);
        messageContext.setProperty(APIConstants.API_ELECTED_RESOURCE, resourceString);
        messageContext.setProperty(APIConstants.API_RESOURCE_CACHE_KEY, resourceCacheKey);
        messageContext.setProperty(APIConstants.REST_METHOD, httpMethod);
        // If this is an OPTIONS request
        if (APIConstants.SupportedHTTPVerbs.OPTIONS.name().equalsIgnoreCase(httpMethod)) {
            // If the OPTIONS method is explicity specified in the resource
            if (Arrays.asList(selectedResource.getMethods()).contains(APIConstants.SupportedHTTPVerbs.OPTIONS.name())) {
                // We will not handle the CORS headers, let the back-end do it.
                return true;
            }
            setCORSHeaders(messageContext, selectedResource);
            Mediator corsSequence = messageContext.getSequence(APIConstants.CORS_SEQUENCE_NAME);
            if (corsSequence != null) {
                corsSequence.mediate(messageContext);
            }
            Utils.send(messageContext, HttpStatus.SC_OK);
            return false;
        } else if (APIConstants.IMPLEMENTATION_TYPE_INLINE.equalsIgnoreCase(apiImplementationType)) {
            setCORSHeaders(messageContext, selectedResource);
            messageContext.getSequence(APIConstants.CORS_SEQUENCE_NAME).mediate(messageContext);
        }
        setCORSHeaders(messageContext, selectedResource);
        return true;
    } catch (Exception e) {
        if (Util.tracingEnabled() && CORSRequestHandlerSpan != null) {
            Util.setTag(CORSRequestHandlerSpan, APIMgtGatewayConstants.ERROR, APIMgtGatewayConstants.CORS_REQUEST_HANDLER_ERROR);
        }
        throw e;
    } finally {
        stopMetricTimer(context);
        if (Util.tracingEnabled()) {
            Util.finishSpan(CORSRequestHandlerSpan);
        }
    }
}