Question

拜托，你能帮帮我吗？我想使用base64保存一个用base64编码的图像。

我试过这个：

var image = 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    image = image.replace(/^data:image\/png;base64,/, "").replace(/^data:image\/jpeg;base64,/, "").replace(/^data:image\/gif;base64,/, "");
    
    var image2 = 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";
    
    fse.writeFile("image.png", image, 'base64', function(err) {
        if(!err)
            console.log('cool ok');
        else
            console.log('erreur' + err);
    });

控制台日志向我显示图像已成功创建，但无法打开它。当我尝试查看图像时，它显示错误（文件已损坏）。

你能帮帮我吗？

请原谅我的错误，我不太擅长英语。

Answer 1

使用Buffer将ascii转为二进制，然后将binary添加到fs.writeFile。

var fs = require('fs');
var binImage = new Buffer(image, 'base64').toString('binary');
fs.writeFile("image.jpg", binImage, "binary", function(err) {
    if(!err)
        console.log('cool ok');
    else
        console.log('erreur' + err);
});

Answer 2

将正则表达式更改为：

 image = image.replace(/^data:image\/(png|png|gif|bmp|jpg|jpeg);base64,/, "");

我在node.js上对它进行了测试，并且它可以处理和渲染您编码的小鸡图像。

如何使用带有base64文本的额外fs保存物理图像

2 个答案: