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Viewing file:     getAwsChunkedEncodingStream.browser.js (1.19 KB)      -rw-r--r--

export const getAwsChunkedEncodingStream = (readableStream, options) => {
    const { base64Encoder, bodyLengthChecker, checksumAlgorithmFn, checksumLocationName, streamHasher } = options;
    const checksumRequired = base64Encoder !== undefined &&
        bodyLengthChecker !== undefined &&
        checksumAlgorithmFn !== undefined &&
        checksumLocationName !== undefined &&
        streamHasher !== undefined;
    const digest = checksumRequired ? streamHasher(checksumAlgorithmFn, readableStream) : undefined;
    const reader = readableStream.getReader();
    return new ReadableStream({
        async pull(controller) {
            const { value, done } = await reader.read();
            if (done) {
                controller.enqueue(`0\r\n`);
                if (checksumRequired) {
                    const checksum = base64Encoder(await digest);
                    controller.enqueue(`${checksumLocationName}:${checksum}\r\n`);
                    controller.enqueue(`\r\n`);
                }
                controller.close();
            }
            else {
                controller.enqueue(`${(bodyLengthChecker(value) || 0).toString(16)}\r\n${value}\r\n`);
            }
        },
    });
};