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index.js
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index.js
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'use strict';
var cheerio = require('cheerio');
const ROOT_ASSETS_REG = /^\/(assets|images|uploads)\/.*/
// http://stackoverflow.com/questions/14480345/how-to-get-the-nth-occurrence-in-a-string
function getPosition(str, m, i) {
return str.split(m, i).join(m).length;
}
hexo.extend.filter.register('after_post_render', function (data) {
var config = hexo.config;
if (config.post_asset_folder) {
var link = data.permalink;
var beginPos = getPosition(link, '/', 3) ;
// var beginPos =
var appendLink = '';
// In hexo 3.1.1, the permalink of "about" page is like ".../about/index.html".
// if not with index.html endpos = link.lastIndexOf('.') + 1 support hexo-abbrlink
var endPos = link.length - 1;
if (/.*\/index\.html$/.test(link)) {
// when permalink is end with index.html, for example 2019/02/20/xxtitle/index.html
// image in xxtitle/ will go to xxtitle/index/
appendLink = 'index/';
endPos = link.lastIndexOf('/');
}
link = link.substring(beginPos, endPos) + '/' + appendLink;
var toprocess = ['excerpt', 'more', 'content'];
for (var i = 0; i < toprocess.length; i++) {
var key = toprocess[i];
var $ = cheerio.load(data[key], {
ignoreWhitespace: false,
xmlMode: false,
lowerCaseTags: false,
decodeEntities: false
});
$('img, a').each(function () {
let $this = $(this);
let name = this.name ? this.name.toLowerCase() : "";
if(name === 'a' ){
let src = $this.attr("href");
// 排除不需要的
if(!src || /^\s+\//.test(src) || /http[s]*.*|\/\/.*|^#.*/.test(src)){
return ;
}
// 简单处理assets/images/uploads开头的: /assets
if (ROOT_ASSETS_REG.test(src)){
let newSrc = config.root.replace(/\/+$/, "") + src;
$this.attr('href', newSrc);
console.info && console.info("update global assets as:-->" + newSrc);
return ;
}
// 切割匹配
var linkArray = link.split('/').filter(el => el != '');
var srcArray = src.split('/').filter(el => el != '' && el != '.');
// asset名称可以对上
if(!linkArray.length || !srcArray.length || linkArray[linkArray.length - 1] !== srcArray[0]){
return ;
}
// post_name/a.pdf -> a.pdf
if (srcArray.length > 1)
srcArray.shift();
src = srcArray.join('/');
if ($this.attr('href')) {
$this.attr('href', link + src);
}
console.info && console.info("update href as:-->" + link + src);
// content
}else if(name === 'img'){
// lazyload
let attrSrc = $this.attr('src') || $this.attr('data-src');
if (attrSrc) {
// For windows style path, we replace '\' to '/'.
var src = attrSrc.replace('\\', '/');
// 优先处理全局资源
if(ROOT_ASSETS_REG.test(src)){
let newSrc = config.root.replace(/\/+$/, "") + src;
$this.attr($this.attr('src')? 'src':'data-src', newSrc);
console.info && console.info("update global assets[images] as:-->" + newSrc);
}else if (!(/http[s]*.*|\/\/.*/.test(src) || /^\s+\//.test(src))) {
// For "about" page, the first part of "src" can't be removed.
// In addition, to support multi-level local directory.
var linkArray = link.split('/').filter(function (elem) {
return elem != '';
});
var srcArray = src.split('/').filter(function (elem) {
return elem != '' && elem != '.';
});
if (srcArray.length > 1)
srcArray.shift();
src = srcArray.join('/');
$this.attr($this.attr('src')? 'src':'data-src', link + src);
console.info && console.info("update link as:-->" + link + src);
}
} else {
console.info && console.info("no src attr, skipped...");
console.info && console.info($this);
}
}
});
data[key] = $.html();
}
}
});