Meteor:ArrayBuffer(FileReader结果)未传递给Meteor.method()

Question

我有这个事件(使用上传图像文件<input type="file">):

       "change .logoBusinessBig-upload":function(event, template){

            var reader = new FileReader()

            reader.addEventListener("load", function(evt){

                var x = reader.result

                console.log(x)

                Meteor.call("saveFile", x)

            })

            reader.readAsArrayBuffer(event.currentTarget.files[0])

        }

而这个Meteor.method()

       saveFile:function(file){

            console.log(file)

            var fs = Npm.require("fs")

            fs.writeFile('../../../../../public/jow.txt', file, function (err) {


                console.log("file saved")

            });

        }

事件中的console.log(x)输出一个ArrayBuffer对象,而Meteor.method()中的console.log(文件)显示并清空{}对象.

这是为什么？ArrayBuffer应该已经传递给Meteor.method()

Answer 1

//client.js

'change': function(event, template) {
    event.preventDefault();
    var file = event.target.files[0]; //assuming you have only 1 file
    var reader = new FileReader(); //create a reader according to HTML5 File API

    reader.onload = function(event){          
      var buffer = new Uint8Array(reader.result) // convert to binary
      Meteor.call('saveFile',buffer);
    }

    reader.readAsArrayBuffer(file); //read the file as arraybuffer
}

//server.js

'saveFile': function(buffer){
    fs.writeFile('/location',new Buffer(buffer),function(error){...});
}

您无法保存到/ public文件夹,这会触发重新加载