云服务器上行宽带

function uploadFile(file) {
    const chunkSize = 1024 * 1024; // 1MB
    const chunks = Math.ceil(file.size / chunkSize);
    let currentChunk = 0;

    function uploadChunk() {
        const start = currentChunk * chunkSize;
        const end = Math.min(file.size, start + chunkSize);
        const chunk = file.slice(start, end);

        const xhr = new XMLHttpRequest();
        xhr.open("POST", "/upload", true);
        xhr.setRequestHeader("Content-Range", `bytes ${start}-${end - 1}/${file.size}`);
        xhr.onload = function () {
            if (xhr.status === 200) {
                currentChunk++;
                if (currentChunk < chunks) {
                    uploadChunk();
                } else {
                    console.log("Upload complete");
                }
            }
        };
        xhr.send(chunk);
    }

    uploadChunk();
}