配合 codeskyblue/gohttpserver 使用，aria2 直接下载目录并保持结构

GoHFS-Exporter.user.js

// ==UserScript==
// @name         GoHFS-Exporter
// @namespace    http://tampermonkey.net/
// @version      2020.10.18(0.1)
// @description  Export link from Go HFS to aria2
// @author       SgDylan
// @match        https://example.com/*
// ==/UserScript==

let downloadFileUrl = [];
let basic_auth = "BASIC AUTH BASE64 CODE";
const aria2_rpc = "http://127.0.0.1:6800/jsonrpc";

addCallerLink();

// 绑定界面
function addCallerLink() {
    // 放置按钮
    var download_btn = document.createElement("button");
    download_btn.id = "ariaGo";
    download_btn.className = "btn btn-xs btn-default";
    download_btn.innerHTML = "Download via Aria";
    document.getElementsByTagName('tr')[0].children[0].children[0].appendChild(download_btn);
    // 绑定事件
    document.getElementById('ariaGo').addEventListener('click', callAria2, false);
}


// 响应 Download via Aria 按钮事件
function callAria2() {
    downloadFileUrl = [];
    parseFolder(window.location.href);
    let aria2 = new ARIA2(aria2_rpc);
    downloadFileUrl.forEach(function(v) {
        aria2.addUri(v.url, {out: v.path, header: 'Authorization: Basic '+basic_auth});
    });
    alert("已将当前文件夹内容添加至下载队列：\n"+decodeURIComponent(window.location.pathname).split('/').pop());
}


// 递归遍历目录
function parseFolder(target_url) {
    let xhr = new XMLHttpRequest();
    let api_url = target_url + "?json=true";
    console.log("当前处理："+api_url);
    xhr.onreadystatechange = function (e) {
        if (xhr.readyState == 4 && xhr.status == 200) {
            let resp = JSON.parse(xhr.responseText);
            resp.files.forEach(function(v) {
                // 如果是文件就添加进待下载列表
                if (v.type == "file") {
                    let temp_item = {};
                    temp_item.url = window.location.origin + "/" + v.path;
                    let this_dir = decodeURIComponent(window.location.pathname).split('/').pop(); // 当前文件夹名称
                    temp_item.path = safeName(v.path.substring(v.path.indexOf(this_dir)));
                    downloadFileUrl.push(temp_item);
                }
                // 如果是目录就递归
                else {
                    parseFolder(window.location.origin + "/" + v.path);
                }
            });
        }
    };
    xhr.open("GET", api_url, false);
    xhr.send();
}


// 过滤不合规的字符
function safeName(nameDesu) {
    return decodeURIComponent(nameDesu).replace(/[\\\|\:\*\"\?\<\>]/g,"_");
}


var ARIA2 = (function() {
    const jsonrpc_version = '2.0';

    function get_auth(url) {
        return url.match(/^(?:(?![^:@]+:[^:@\/]*@)[^:\/?#.]+:)?(?:\/\/)?(?:([^:@]*(?::[^:@]*)?)?@)?/)[1];
    }

    function request(jsonrpc_path, method, params) {
        let xhr = new XMLHttpRequest();
        let auth = get_auth(jsonrpc_path);
        jsonrpc_path = jsonrpc_path.replace(/^((?![^:@]+:[^:@\/]*@)[^:\/?#.]+:)?(\/\/)?(?:(?:[^:@]*(?::[^:@]*)?)?@)?(.*)/, '$1$2$3'); // auth string not allowed in url for firefox

        let request_obj = {
            jsonrpc: jsonrpc_version,
            method: method,
            id: (new Date()).getTime().toString(),
        };
        if (params) request_obj.params = params;
        if (auth && auth.indexOf('token:') === 0) params.unshift(auth);

        xhr.open("POST", jsonrpc_path+"?tm="+(new Date()).getTime().toString(), true);
        xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded; charset=UTF-8");
        if (auth && auth.indexOf('token:') !== 0) {
            xhr.setRequestHeader("Authorization", "Basic "+btoa(auth));
        }
        xhr.send(JSON.stringify(request_obj));
    }

    return function(jsonrpc_path) {
        this.jsonrpc_path = jsonrpc_path;
        this.addUri = function (uri, options) {
            request(this.jsonrpc_path, 'aria2.addUri', [[uri, ], options]);
        };
        return this;
    };
})();