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Viewing file:     validateChecksumFromResponse.js (1.29 KB)      -rw-r--r--

import { getChecksum } from "./getChecksum";
import { getChecksumAlgorithmListForResponse } from "./getChecksumAlgorithmListForResponse";
import { getChecksumLocationName } from "./getChecksumLocationName";
import { selectChecksumAlgorithmFunction } from "./selectChecksumAlgorithmFunction";
export const validateChecksumFromResponse = async (response, { config, responseAlgorithms }) => {
    const checksumAlgorithms = getChecksumAlgorithmListForResponse(responseAlgorithms);
    const { body: responseBody, headers: responseHeaders } = response;
    for (const algorithm of checksumAlgorithms) {
        const responseHeader = getChecksumLocationName(algorithm);
        const checksumFromResponse = responseHeaders[responseHeader];
        if (checksumFromResponse) {
            const checksumAlgorithmFn = selectChecksumAlgorithmFunction(algorithm, config);
            const { streamHasher, base64Encoder } = config;
            const checksum = await getChecksum(responseBody, { streamHasher, checksumAlgorithmFn, base64Encoder });
            if (checksum === checksumFromResponse) {
                break;
            }
            throw new Error(`Checksum mismatch: expected "${checksum}" but received "${checksumFromResponse}"` +
                ` in response header "${responseHeader}".`);
        }
    }
};