Node.js的从网页和连接$ C $获得图象C使用Base64 [英] Node.js get image from web and encode with base64

问题描述

我试图从网络和连接code它的base64获取的图像。

I'm trying to fetch an image from the web and encode it with base64.

我至今基本上是：

var request = require('request');
var BufferList = require('bufferlist').BufferList;

bl = new BufferList(),

request({uri:'http://tinypng.org/images/example-shrunk-8cadd4c7.png',responseBodyStream: bl}, function (error, response, body) 
{
    if (!error && response.statusCode == 200) 
    {
        var type = response.headers["content-type"];
        var prefix = "data:" + type + ";base64,";
        var base64 = new Buffer(bl.toString(), 'binary').toString('base64');
        var data = prefix + base64;
        console.log(data);
    }
});

这似乎是pretty接近解决方案，但我不能完全得到它的工作。它识别的数据类型和给出的输出：

This seems to be pretty close to the solution but i can't quite get it to work. It recognizes the data type and gives out the output:

data:image/png;base64

不过bufferlist'BL'似乎是空的。

however the bufferlist 'bl' seems to be empty.

在此先感谢！

推荐答案

BufferList已经过时，因为它现在的功能是节点的核心。这里唯一棘手的部分是设置请求不使用任何编码方式：

BufferList is obsolete, as it's functionality is now in Node core. The only tricky part here is setting request not to use any encoding:

var request = require('request').defaults({ encoding: null });

request.get('http://tinypng.org/images/example-shrunk-8cadd4c7.png', function (error, response, body) {
    if (!error && response.statusCode == 200) {
        data = "data:" + response.headers["content-type"] + ";base64," + new Buffer(body).toString('base64');
        console.log(data);
    }
});

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