package.dist-cjs.getAwsChunkedEncodingStream.js Maven / Gradle / Ivy

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"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.getAwsChunkedEncodingStream = void 0;
const stream_1 = require("stream");
const getAwsChunkedEncodingStream = (readableStream, options) => {
    const { base64Encoder, bodyLengthChecker, checksumAlgorithmFn, checksumLocationName, streamHasher } = options;
    const checksumRequired = base64Encoder !== undefined &&
        checksumAlgorithmFn !== undefined &&
        checksumLocationName !== undefined &&
        streamHasher !== undefined;
    const digest = checksumRequired ? streamHasher(checksumAlgorithmFn, readableStream) : undefined;
    const awsChunkedEncodingStream = new stream_1.Readable({ read: () => { } });
    readableStream.on("data", (data) => {
        const length = bodyLengthChecker(data) || 0;
        awsChunkedEncodingStream.push(`${length.toString(16)}\r\n`);
        awsChunkedEncodingStream.push(data);
        awsChunkedEncodingStream.push("\r\n");
    });
    readableStream.on("end", async () => {
        awsChunkedEncodingStream.push(`0\r\n`);
        if (checksumRequired) {
            const checksum = base64Encoder(await digest);
            awsChunkedEncodingStream.push(`${checksumLocationName}:${checksum}\r\n`);
            awsChunkedEncodingStream.push(`\r\n`);
        }
        awsChunkedEncodingStream.push(null);
    });
    return awsChunkedEncodingStream;
};
exports.getAwsChunkedEncodingStream = getAwsChunkedEncodingStream;