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我正在尝试在 Meteor/Slingshot 中将图像上传到 AWS S3。上传等待很长时间，然后失败（400 Bad request）。有些文件设法上传，但大多数时候他们没有。这似乎是随机发生的。

可能导致这种情况的原因是什么？

S3 存储桶位于爱尔兰“eu-west-1”。这是我的代码：

在 settings.json 中：

{
  "public": {

  },
  "AWSAccessKeyId" : <keyID>,
  "AWSSecretAccessKey" : <Secret>,
  "AWSBucket" : <bucket_name>,
  "AWSRegion": "eu-west-1"
}

app/lib/_fileUploadRestrictions.js

Slingshot.fileRestrictions("imageUploads", {
  allowedFileTypes: ["image/png", "image/jpeg", "image/gif"],
  maxSize: 10 * 1024 * 1024 // 10 MB (use null for unlimited).
});

应用程序/服务器/fileUploadDirectives.js

Slingshot.createDirective("imageUploads", Slingshot.S3Storage, {
  region: Meteor.settings.AWSRegion,
  bucket: Meteor.settings.AWSBucket,
  acl: "public-read",
  expire: 200,

  authorize: function () {
    //Deny uploads if user is not logged in.
    if (!this.userId) {
      var message = "Please login before posting files";
      throw new Meteor.Error("Login Required", message);
    }

    return true;
  },

  key: function (file) {
    //Store file into a directory by the user's username.
    var userId = Meteor.userId();
    return "userfilies" + "/" + userId + "/" + "images" + "/" + file.name;
  }
});

应用程序/客户端/fileUploader.js

Template.fileUploader.events({
  'change .fileinput': function(event, template) {
    var fileToUpload = event.target.files[0];
    var fullUpload = new Slingshot.Upload("imageUploads");
    fullUpload.send(fileToUpload, function (error, downloadUrl) {
      if (error) {
        toastr.error("Upload failed... please try again.");
        console.log(error);
        console.log(fullUpload.xhr.response);
      }
      else {
        toastr.success('Upload succeeded!');
      }
    });
    Template.instance().uploader.set(fullUpload);
  },
});
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