Azure/azure-sdk-for-js#6577 cannot copy zero-length files

minimal-reproduction.js

const {BlobServiceClient, generateBlobSASQueryParameters} = require("@azure/storage-blob");
require("dotenv").config();

const connectionString = process.env.AZURE_TEST_CONNECTION_STRING;
const containerName = process.env.AZURE_TEST_CONTAINER;

// MAGIC VALUE, empty buffer causes errors/timeouts, non-empty buffer is copied
const content = Buffer.from('');

async function getSignedUrl(blobClient){
    const expiry = 3600;
    const startsOn = new Date();
    const expiresOn = new Date(new Date().valueOf() + expiry * 1000);

    const token = await generateBlobSASQueryParameters(
        {
            containerName: blobClient.containerName,
            blobName: blobClient.location,
            permissions: "r", // Required
            startsOn, // Required
            expiresOn, // Optional
        },
        blobClient.credential,
    );

    return `${blobClient.url}?${token.toString()}`;
}

(async () => {
    try {
        const blobServiceClient = BlobServiceClient.fromConnectionString(connectionString);
        const containerClient = blobServiceClient.getContainerClient(containerName);
        const sourceBlobClient = containerClient.getBlockBlobClient('source-file');
        const targetBlobClient = containerClient.getBlockBlobClient('target-file');
        await sourceBlobClient.upload(content, content.byteLength);

        const url = await getSignedUrl(sourceBlobClient);
        console.log(`source: ${url}`);

        await targetBlobClient.syncCopyFromURL(url);
        console.log(`target: ${await getSignedUrl(targetBlobClient)}`);
    } catch (e) {
        console.log(e);
    }
})();