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微信公众号推文图片一键下载

一键下载微信公众号推文内的图片到本地保存

// ==UserScript==
// @name         微信公众号推文图片一键下载
// @namespace    http://tampermonkey.net/
// @version      0.0.1
// @description  一键下载微信公众号推文内的图片到本地保存
// @author       LeO
// @match        https://mp.weixin.qq.com/s/*
// @match        https://mp.weixin.qq.com/s?__biz=*
// @require      http://libs.baidu.com/jquery/1.9.0/jquery.js
// @grant        GM_addStyle
// @grant        GM_download
// @grant        GM_xmlhttpRequest
// @grant        GM_getResourceText
// @resource Bootstrap http://libs.baidu.com/bootstrap/3.1.1/css/bootstrap.min.css
// @license MIT
// ==/UserScript==


var body_data={
    "isuse":1,
    "title":"",
    "copyright":"",
    "post_date":"",
    "post_user":"",
    "post_auth":"",
    "js_content":"",
    "wx_code":"",
    "wx_desc":"",
    "imgs":Array(),
    "imgs_tag":Array()
};


function dl(m)
{
    var ext=".jpg";
    if (body_data.imgs[m].indexOf('wx_fmt=gif')>0 || body_data.imgs[m].indexOf('mmbiz_gif')>0)
    {	ext=".gif"; }
    if (body_data.imgs[m].indexOf('wx_fmt=png')>0 || body_data.imgs[m].indexOf('mmbiz_png')>0)
    {	ext=".png"; }
    if (body_data.imgs[m].indexOf('wx_fmt=bmp')>0 || body_data.imgs[m].indexOf('mmbiz_bmp')>0)
    {	ext=".bmp"; }

    var fn=body_data.title+m.toString()+ext;

    GM_xmlhttpRequest({
        method: 'GET',
        url: body_data.imgs[m],
        responseType: 'blob',
        onload:function (xhr) {
            var blobURL=window.URL.createObjectURL(xhr.response);
            if (body_data.imgs_tag[m]==1)
            {
                let download_a = document.querySelector('.download_a');
                download_a.href = blobURL;
                download_a.setAttribute('download', fn);
                download_a.click();
                window.URL.revokeObjectURL(blobURL);
                body_data.imgs_tag[m]=0;

                if (m<(body_data.imgs.length-1)) {
                    m++;
                    dl(m);
                    $("#cnum")[0].innerText=m+"/"+body_data.imgs.length;
                }
                else
                {
                    $("#cnum")[0].innerText="";
                }
            }
        }
    });
}


function download_fn(){
    dl(0);
}

(function() {
    'use strict';
    var Bootstrap=GM_getResourceText("Bootstrap");
    GM_addStyle(Bootstrap);

    var $btn1=$('<button class="btn btn-success" id="btn1"><small>一键下载所有图片</small> <span id=cnum></span></button><a class="download_a" style="display:none;" download=""></a>');


    $btn1.click(download_fn);
    $("#img-content").prepend($btn1);

    var title = $('meta[property="twitter:title"]').attr("content");
    if (title.length==0) {
        title=$("title").text();
    }
    body_data.title=title;

    var gs=$("#js_content")[0].getElementsByTagName("img");
    var imgs=Array();
    var imgs_tag=Array();
    for (var i=0;i<gs.length;i++)
    {
        if (gs[i].dataset.src) {imgs.push(gs[i].dataset.src);}
        else if (gs[i].src)
        {
            var tmp=gs[i].src;
            tmp=tmp.replace("//res.wx.qq.com/mmbizwap","http://res.wx.qq.com/mmbizwap");
            imgs.push(tmp);
        }
        imgs_tag.push(1);
    }
    body_data.imgs=imgs;
    body_data.imgs_tag=imgs_tag;
    $("#cnum")[0].innerText=imgs.length;
    console.log(body_data);

    // Your code here...
})();