Question

嗨，我正在尝试从JavaScript客户端发送文件并将其上传到node.js服务器，并且它确实可以正常工作，客户端：

var ws = new WebSocket("ws://localhost");
ws.binaryType = "arraybuffer";
//file input code, it all works etc...
loader.onload = (e) {
   ws.send(e.target.result); //actually works and sends the arraybuffer
}
loader.readAsArrayBuffer(file/*not quoted here but you get the idea*/)

服务器端并不仅仅只是基本的websocket服务器，它确实会接收arraybuffer（以缓冲区的形式）。

问题：我还需要将文件 name 与数据一起发送，如何在客户端的ArrayBuffer中添加文件头，并在节点中读取它？

Answer 1

您可以将ArrayBuffer封装在带有文件名或元数据的对象中吗？即

var ws = new WebSocket("ws://localhost");
ws.binaryType = "arraybuffer";

// the object to be passed by the socket
var filePayload = {
    fileName:'file.file',
    fileType:'xxx'
    // any othere metadata here
};

//file input code, it all works etc...
loader.onload = (e) => {
    // add the array buffer as a property in the object
    filePayload['data'] = e.target.result;
    ws.send(filePayload); 
}
loader.readAsArrayBuffer(file/*not quoted here but you get the idea*/)

JavaScript文件API到node.js的方法如何通过websocket发送ArrayBuffer和数据

1 个答案: