node.js抓取網路圖片儲存到本地，node.js抓取防盜鏈網路圖片儲存到本地

使用模組request、fs，request模組在npm裡平均月下載量超過3000W次，那是相當的牛逼。

node版本8.0+，如果版本是8.0以下呼叫的時候就直接用promise。

封裝

let request = require("request");
let fs = require("fs");

class Ut {
  /**
	 * 下載網路圖片
	 * @param {object} opts 
	 */
  static downImg(opts = {}, path = '') {
    return new Promise((resolve, reject) => {
      request
        .get(opts)
        .on('response', (response) => {
          console.log("img type:", response.headers['content-type'])
        })
        .pipe(fs.createWriteStream(path))
        .on("error", (e) => {
          console.log("pipe error", e)
          resolve('');
        })
        .on("finish", () => {
          console.log("finish");
          resolve("ok");
        })
        .on("close", () => {
          console.log("close");
        })

    })
  };
}

module.exports = Ut;
 

測試普通網路圖片

let Ut = require("./common");

(async () => {
  try {
    let url = "http://avatar.csdn.net/1/A/1/3_zzwwjjdj1.jpg";
    let opts = {
      url: url,
    };
    let path = "./1.jpg";
    let r1 = await Ut.downImg(opts, path);
    console.log(r1);
  }
  catch (e) {
    console.log(e);
  }
})()
 

執行

測試防盜鏈圖片

let Ut = require("./common");

(async () => {
  try {
    let url = "http://i.meizitu.net/thumbs/2018/01/117406_24c17_236.jpg";
    let opts = {
      url: url,
    };
    let path = "./2.jpg";
    let r1 = await Ut.downImg(opts, path);
    console.log(r1);
  }
  catch (e) {
    console.log(e);
  }
})()
 

let Ut = require("./common");

(async () => {
  try {
    let url = "http://i.meizitu.net/thumbs/2018/01/117406_24c17_236.jpg";
    let opts = {
      url: url,
      headers: {
        'Referer': 'http://www.mzitu.com/',
      }
    };
    let path = "./2.jpg";
    let r1 = await Ut.downImg(opts, path);
    console.log(r1);
  }
  catch (e) {
    console.log(e);
  }
})()