如何使用NodeJs下载图片并生成Base64

作者: 赵星云 | 来源:发表于2017-01-11 12:43 被阅读0次

直接上源码了，用了ES6的语法：

'use strict';
const http = require('http');
var fs = require('fs');
http.get('http://img11.360buyimg.com/n1/jfs/t3451/90/758861696/258163/b95752c/58130f31Nb8582cd3.jpg', function (req, res) {
    let bufferList = [];
    let bufferLength = 0;
    req.on('error', (error) => {
        console.log(error);
    });
    req.on('data', function (data) {
        bufferList.push(data);
        bufferLength += data.length;
    });
    req.on('end', function (data) {
        // 封面请求完成
        
        let imgBuffer = new Buffer(bufferLength);
        let pos = 0;
        for (let buffer of bufferList) {
            buffer.copy(imgBuffer, pos);
            pos += buffer.length;
        }
        
        
        let test = `
            <html>
                <body>
                    <img src="data:image/jpg;base64,${imgBuffer.toString('base64')}" />
                </body>
            </html>
        `;
        fs.writeFileSync('test.base64.html',test);
        fs.writeFileSync('test.base64.jpg',imgBuffer);
    });
});