跨域图片加载
当前为
// ==UserScript==
// @name 轻小说文库下载
// @namespace wenku8Haoa
// @version 1.3
// @description 跨域图片加载
// @author HaoaW
// @match https://www.wenku8.net/*
// @match http://www.wenku8.net/*
// @connect dl.wenku8.com
// @connect picture.wenku8.com
// @connect img.wenku8.com
// @require https://ajax.aspnetcdn.com/ajax/jQuery/jquery-3.5.1.min.js
// @grant GM_xmlhttpRequest
// ==/UserScript==
(function () {
'use strict';
//替换所有
String.prototype.replaceAll = function (exp, newStr) {
return this.replace(new RegExp(exp, "gm"), newStr);
};
//标记含有html代码的行
var htmlLine = function (txt) {
return 'c1ef6520' + txt + '1a5219e9b2b0';
};
//格式化内容
var contentFormat = function (txt) {
//设置章节名样式
let txtTmp = txt.replaceAll(/^ {2}\S+.*$/,
function (match) {
return htmlLine('<br/><div style="background:#e4e1d8" id="title">' + match.trim() + '</div>');
}
);
txtTmp = $('<div></div>').text(txtTmp).html();
txtTmp = txtTmp.replaceAll(/ /, ' ');
txtTmp = txtTmp.replaceAll(/(c1ef6520).*(1a5219e9b2b0)/,
function (match) {
return $('<div></div>').html(match.replaceAll(/( )/, ' ').replace('c1ef6520', '').replace('1a5219e9b2b0', '')).text();
}
);
txtTmp = txtTmp.replaceAll(/[\r\n]+/, '<br/>');
return txtTmp;
};
// 下载图片blob展示，解决跨域问题。
var imgBlobCreate = function (imgEle, srcURL) {
GM_xmlhttpRequest({
method: 'GET',
url: srcURL,
responseType: 'blob',
onload: function (rsp) {
if (rsp.statusText == "OK") {
let rspBlob = rsp.response;
let blobSrc = URL.createObjectURL(rspBlob);
imgEle.onload = function (evt) {
URL.revokeObjectURL(this.src);
};
imgEle.src = blobSrc;
}
},
});
};
//格式化图片
var imgFormat = function (txt) {
let imgResultRoot = $('<div></div>');
let imgRoot = $('<div></div>').html(txt);
$('.divimage', imgRoot).each(function () {
let jqthis = $(this);
let imgURL = jqthis.attr('title');//取得图片url
let itemEle = $('<div class="divimage"><a target="_blank"><img border="0" class="imagecontent" /></a></div>');
$('a', itemEle).attr('href', imgURL);
$('img', itemEle).attr('src', imgURL);
imgResultRoot.append(itemEle);
});
return imgResultRoot.html();
}
//格式化从pack.php下载的带有Html的内容
var htmlFormat = function (htmlStr) {
let resultRoot = $('<div></div>');
let strRoot = $('<div></div>').html(htmlStr);
$('.chaptertitle', strRoot).each(function () {
let jqthis = $(this);
let cTitle = jqthis.text();//取得章节名
let itemEle = $('<div style="background-color:silver" id="title"></div>');
itemEle.text(cTitle);
resultRoot.append(itemEle);
resultRoot.append('<br />');
let nextHtml = jqthis.next().html();
if (-1 != cTitle.indexOf('插图')) {
nextHtml = imgFormat(nextHtml);
}
resultRoot.append(nextHtml);
resultRoot.append('<br /><br />');
});
return resultRoot.html();
}
// 检查跨域请求
var checkUrl = function (url) {
return new Promise(function (resolve, reject) {
if (-1 == url.indexOf('.wenku8.')) resolve(false);
var oReq = new XMLHttpRequest();
oReq.addEventListener("loadend", function () {
if (oReq.status == 200)
resolve(false)
else
resolve(true)
});
oReq.open("HEAD", url);
oReq.send();
});
};
//使用下载图片blob的方式加载图片
$('img').each(function () {
let imgEle = this;
checkUrl(imgEle.src).then(function (rst) {
if (rst) {
imgBlobCreate(imgEle, imgEle.src);
}
});
});
//目录或内容页面会声明章节变量。
if ('undefined' == typeof chapter_id || undefined === chapter_id) { }
else {
//本书编号 article_id
//目录页面章节id定义为 '0'
if ('0' == chapter_id) {//在章节名之后添加下载链接
//书名
let aname = $('#title').text();
//添加全本下载链接
let allDLink = 'http://dl.wenku8.com/down.php?type=utf8&id=' + article_id + '&fname=' + aname;
let allaEle = '<a href="' + allDLink + '"> 全本下载(utf-8)</a>';
$('#title').append(allaEle);
$('.vcss').each(function () {
let jqthis = $(this);
let vname = jqthis.text();
let nextChapter = jqthis.parent().next().children().first();
let vid = $('a', nextChapter).attr('href').split('.')[0];
//vid = (Number(vid)-1).toString();//部分文章无法使用章节减1来下载，直接使用章节可以下载(下载内容使用-1时章节名包含小说名，不-1不包含小说名)
let dlink = 'http://dl.wenku8.com/packtxt.php?aid=' + article_id +
'&vid=' + vid + '&aname=' + aname + '&vname=' + vname + '&charset=utf-8';
let aEle = '<a href="' + dlink + '"> 下载(utf-8)</a>'
jqthis.append(aEle);
});
}
else {
if ('0' != chapter_id) {//内容页面
//如果包含一个内容为 'null'的span则判定为版权限制
if ($('#contentmain span').first().text().trim() == 'null') {
//设置下一页和上一页快捷键到目录页
preview_page = next_page = index_page;
$('#content').text('正在下载，请稍候...');
//下载带有Html标记的内容
let dlink = 'http://dl.wenku8.com/pack.php?aid=' + article_id +
'&vid=' + chapter_id;
GM_xmlhttpRequest({
method: 'GET',
url: dlink,
onload: function (response) {
if (response.statusText == "OK") {
var formatHtml = htmlFormat(response.responseText);
$('#content').html(formatHtml);
//使用下载图片blob的方式加载图片
$('img').each(function () {
let imgEle = this;
checkUrl(imgEle.src).then(function (rst) {
if (rst) {
imgBlobCreate(imgEle, imgEle.src);
}
});
});
} else {//html下载可能会失败，使用下载文本的方法来下载
if (-1 != $('#title').text().indexOf('插图')) {
$('#content').text('无法获取插图');
} else {
dlink = 'http://dl.wenku8.com/packtxt.php?aid=' + article_id +
'&vid=' + chapter_id;
GM_xmlhttpRequest({
method: 'GET',
url: dlink,
onload: function (response) {
if (response.statusText == "OK") {
let formatTxt = contentFormat(response.responseText);
$('#content').html(formatTxt);
} else {
$('#content').text('下载失败');
}
},
});
}
}
},
});
}
}
}
}
// Your code here...
})();