• 这取决于后端和前端的连接方式，因为您无法使用HTTP POST将此格式的映像传输到后端，因为HTTP POST的最大大小为64 KB
• 但是，使用WebSocket/WebRTC库（如Socket.io）将图像以blob形式发送到后端是非常可能的
• 例如，让我们以express后端和传统的静态html主页为例，其中包含一些javascript * 示例 *

//my webpage which has the blob this is some browser javascript connected to a html file
    //Hosted on http://localhost:3000
          var base64data
    //I have a cake.png in my static directory
            fetch("cake.png")
                .then(response => response.blob())
                .then(blob => {
                    const fileReader = new FileReader();
                    fileReader.readAsDataURL(blob);
                    fileReader.onloadend = function() {
                        base64data = fileReader.result;
                    }
                })
            .catch(error => {
                console.error(error);
            });
          const socket = io("http://localhost:4000")
            socket.on('connect',()=>{
    //Sent this blob to the server
              socket.emit('blob',base64data)
            })

我的nodejs文件，其中包含socket.io和驱动器APISocket.io服务器，托管在http：//localhost：4000上

const { Server } = require("socket.io");
const google = require("googleapis");
const io = new Server(4000, {
    cors: {
        "Access-Control-Allow-Origin": "*",
        methods: ["GET", "POST", "OPTIONS"],
    },
});
/*Initialize the drive
 *......
 *......
 */
io.on("connection", (socket) => {
    socket.on("blob", (blob) => {
        drive.files.create({
            requestBody: {
                name: "image.png",
                mimeType: "image/png",
            },
            media: {
                mimeType: "image/png",
                body: blob,
            },
        });
    });
});

因此，在创建文件时，blob可用作body的输入