tus-上传后访问控制允许源错误

我用的都是 tus-node-server 以及 tus-js-client 尝试从Web浏览器将文件上载到我的服务器。在较小的文件(10MB的ISH),它似乎工作良好,但在更大的文件(38 5MB ISH),似乎是失败与A Access-Control-Allow-Origin 失败。

上传进程被调用并一直完成到100%,然后失败并出现错误。这使我认为这个错误与某种类型的验证有关。

在控制台中抛出该错误后,它会一直重试,直到达到我设置的重试限制。

我已经把错误贴在下面了。为什么会这样?

[Error] Origin https://example.com is not allowed by Access-Control-Allow-Origin.
[Error] XMLHttpRequest cannot load https://upload.example.com//saiudfhia1h due to access control checks.
[Error] Failed to load resource: Origin https://example.com is not allowed by Access-Control-Allow-Origin.

同样,在尝试所有重试之后,失败并出现此错误。

tus: failed to upload chunk at offset 0, caused by [object XMLHttpRequestProgressEvent], originated from request (response code: 0, response text: )

前端JS:

var upload = new tus.Upload(file, {
    endpoint: "https://upload.example.com/?id=" + res._id,
    retryDelays: [0, 1000, 3000, 5000],
    metadata: {
        filename: res._id,
        filetype: file.type
    },
    onError: function(error) {
        console.log("Failed because: " + error)
    },
    onProgress: function(bytesUploaded, bytesTotal) {
        console.log(bytesUploaded, bytesTotal, percentage + "%")
    },
    onSuccess: function() {
        console.log("Download %s from %s", upload.file.name, upload.url)

        alert("You have successfully uploaded your file");
    }
})

// Start the upload
upload.start()

后端JS:

server.datastore = new tus.FileStore({
    directory: '/files',
    path: '/',
    namingFunction: fileNameFromUrl
});

server.on(EVENTS.EVENT_UPLOAD_COMPLETE, (event) => {
    console.log(`Upload complete for file ${event.file.id}`);

    let params = {
        Bucket: keys.awsBucketName,
        Body: fs.createReadStream(path.join("/files", event.file.id)),
        Key: `${event.file.id}/rawfile`
    };
    s3.upload(params, function(err, data) {
        console.log(err, data);
        fs.unlink(path.join("/files", event.file.id), (err) => {
            if (err) throw err;
            console.log('successfully deleted file');
        });
    });
});

const app = express();
const uploadApp = express();
uploadApp.all('*', server.handle.bind(server));
app.use('/', uploadApp);
app.listen(3000);