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Viewing file:     AwsSdkSigV4Signer.js (2.72 KB)      -rw-r--r--

import { HttpRequest } from "@smithy/protocol-http";
import { getDateHeader, getSkewCorrectedDate, getUpdatedSystemClockOffset } from "../utils";
const throwSigningPropertyError = (name, property) => {
    if (!property) {
        throw new Error(`Property \`${name}\` is not resolved for AWS SDK SigV4Auth`);
    }
    return property;
};
const validateSigningProperties = async (signingProperties) => {
    const context = throwSigningPropertyError("context", signingProperties.context);
    const config = throwSigningPropertyError("config", signingProperties.config);
    const authScheme = context.endpointV2?.properties?.authSchemes?.[0];
    const signerFunction = throwSigningPropertyError("signer", config.signer);
    const signer = await signerFunction(authScheme);
    const signingRegion = signingProperties?.signingRegion;
    const signingName = signingProperties?.signingName;
    return {
        config,
        signer,
        signingRegion,
        signingName,
    };
};
export class AwsSdkSigV4Signer {
    async sign(httpRequest, identity, signingProperties) {
        if (!HttpRequest.isInstance(httpRequest)) {
            throw new Error("The request is not an instance of `HttpRequest` and cannot be signed");
        }
        const { config, signer, signingRegion, signingName } = await validateSigningProperties(signingProperties);
        const signedRequest = await signer.sign(httpRequest, {
            signingDate: getSkewCorrectedDate(config.systemClockOffset),
            signingRegion: signingRegion,
            signingService: signingName,
        });
        return signedRequest;
    }
    errorHandler(signingProperties) {
        return (error) => {
            const serverTime = error.ServerTime ?? getDateHeader(error.$response);
            if (serverTime) {
                const config = throwSigningPropertyError("config", signingProperties.config);
                const initialSystemClockOffset = config.systemClockOffset;
                config.systemClockOffset = getUpdatedSystemClockOffset(serverTime, config.systemClockOffset);
                const clockSkewCorrected = config.systemClockOffset !== initialSystemClockOffset;
                if (clockSkewCorrected && error.$metadata) {
                    error.$metadata.clockSkewCorrected = true;
                }
            }
            throw error;
        };
    }
    successHandler(httpResponse, signingProperties) {
        const dateHeader = getDateHeader(httpResponse);
        if (dateHeader) {
            const config = throwSigningPropertyError("config", signingProperties.config);
            config.systemClockOffset = getUpdatedSystemClockOffset(dateHeader, config.systemClockOffset);
        }
    }
}
export const AWSSDKSigV4Signer = AwsSdkSigV4Signer;