Node.js，caman：错误：给定的图像尚未完成仅使用jpg图像加载

Question

HY 我正在编辑本地存储在我的电脑上的各种图像，我对png图像没有任何问题，但是当我尝试编辑jpg图像时，我总是会收到以下错误

this.context.drawImage(this.image, 0, 0, this.imageWidth(), this.image
                 ^
Error: Image given has not completed loading

这是我的代码

Caman('C://images//' + req.body['storedName'], function () {
    var regulations = JSON.parse(req.body['regulations']);
    this.saturation(regulations.saturation);
    this.sepia(regulations.sepia);
    this.vibrance(regulations.vibrance);
    this.sharpen(regulations.sharpen);
    this.brightness(regulations.brightness);
    this.contrast(regulations.contrast);
    this.exposure(regulations.exposure);
    this[req.body['preset']]();
    this.render(function () {
        this.save('C://images//' + req.body['storedName']);
    });
});

知道问题可能是什么？感谢。

修改 在@ lombausch评论后我改变了我的代码，所以现在它看起来像这样，

var myimage = new Canvas.Image();
myimage.onload = function() {
    Caman('C://images//' + req.body['storedName'], function () {
        var regulations = JSON.parse(req.body['regulations']);
        this.saturation(regulations.saturation);
        this.sepia(regulations.sepia);
        this.vibrance(regulations.vibrance);
        this.sharpen(regulations.sharpen);
        this.brightness(regulations.brightness);
        this.contrast(regulations.contrast);
        this.exposure(regulations.exposure);
        this[req.body['preset']]();
        this.render(function () {
            var extension = path.extname(req.body['storedName']);
            var filename = path.basename(req.body['storedName'],extension);
            this.save('C://images//' + filename + '-caman' + extension);
            res.json({ status:'success' });
        });
    });
};
myimage.onerror = function(err){
    console.log(err);
    res.json({status:"error", message:err});
};
myimage.src = 'C://images//' + req.body['storedName'];

错误不再显示，但没有任何反应，当我什么都不说，我什么都不说，不是错误消息，也不是其他什么，似乎onload永远不会被解雇。