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ASK SDK Utilities

The SDK provides multiple utility functions that aim to reduce boilerplate code so that you can focus on skill business logic.

RequestEnvelopeUtils

The RequestEnvelopeUtils provides functions for getting frequently used attributes from the RequestEnvelope with error checking logic.

Available Methods

getLocale(requestEnvelope: RequestEnvelope): string;
getRequestType(requestEnvelope: RequestEnvelope): string;
getIntentName(requestEnvelope: RequestEnvelope): string;
getAccountLinkingAccessToken(requestEnvelope: RequestEnvelope): string;
getApiAccessToken(requestEnvelope: RequestEnvelope): string;
getDeviceId(requestEnvelope: RequestEnvelope): string;
getUserId(requestEnvelope: RequestEnvelope): string;
getDialogState(requestEnvelope: RequestEnvelope): string;
getSlot(requestEnvelope: RequestEnvelope, slotName: string): Slot;
getSlotValue(requestEnvelope: RequestEnvelope, slotName: string): string;
getSupportedInterfaces(requestEnvelope: RequestEnvelope): SupportedInterfaces;
isNewSession(requestEnvelope: RequestEnvelope): boolean;

Example

The following code example shows how you can use the request envelope utilities.

const ExampleIntentHandler = {
    canHandle(handlerInput) {
        return Alexa.getRequestType(handlerInput.requestEnvelope) === 'IntentRequest'
            && Alexa.getIntentName(handlerInput.requestEnvelope) === 'ExampleIntent';
    },
    handle(handlerInput) {
        const userId = Alexa.getUserId(handlerInput.requestEnvelope);
        const deviceId = Alexa.getDeviceId(handlerInput.requestEnvelope);
        const locale = Alexa.getLocale(handlerInput.requestEnvelope);
        const slotValue = Alexa.getSlotValue(handlerInput.requestEnvelope, 'slotName');
        // Code to handle the intent and return a response ...
    }
};

SsmlUtils

The SsmlUtils provides a function for escaping invalid SSML characters in a speech string.

Available Methods

escapeXmlCharacters(input: string): string

ViewportUtils

The ViewportUtils provides functions for checking the viewport profile and other device characteristics such as display size or dpi in the RequestEnvelope.

Available Methods

getViewportOrientation(width: number, height: number): ViewportOrientation;
getViewportSizeGroup(size: number): ViewportSizeGroup;
getViewportDpiGroup(dpi: number): ViewportDpiGroup;
getViewportProfile(requestEnvelope: RequestEnvelope): ViewportProfile;