使用meteor-slingshot将blob字符串上传到aws

Question

我在网上看到，可以使用meteor-slingshot将blob字符串上传到aws。唯一的问题是，每当我将blob传递给上传者时，我都会获得ApplicationDbContext。

我从裁剪器中获取此对象：

edgee_slingshot.js:283 Uncaught Error: Not a file

然后我将字符串提取为我的blob：

{
    width: 300, 
    height: 168, 
    type: "png", 
    string: "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAASwAokEjHVW7m2KLDU//lU/Of7KFtKzGCDnwAAAAASUVORK5CYII="
}

然后是上传者：

data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAS.....CDnwAAAAASUVORK5CYII=

通过控制台我可以看到错误：

let uploader = new Slingshot.Upload("example");
uploader.send(blob, function(error, url) {
    if (error) {
        console.log(error, "An error happened during the upload.");
    }
    if (!error) {
        console.log("success, here is the url: ", url);
    }
});