673f38246a
Move classes required for Lua runtime support into a new `luci-lua-runtime` package. Also replace the `luci.http` and `luci.util` classes in `luci-lib-base` with stubbed versions interacting with the ucode based runtime environment. Finally merge `luci-base-ucode` into the remainders of `luci-base`. Signed-off-by: Jo-Philipp Wich <jo@mein.io>
942 lines
20 KiB
Ucode
942 lines
20 KiB
Ucode
// Copyright 2022 Jo-Philipp Wich <jo@mein.io>
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// Licensed to the public under the Apache License 2.0.
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import { open, stat, glob, lsdir, unlink, basename } from 'fs';
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import { striptags, entityencode } from 'html';
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import { connect } from 'ubus';
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import { cursor } from 'uci';
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import { rand } from 'math';
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import { hash, load_catalog, change_catalog, translate, ntranslate, getuid } from 'luci.core';
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import { revision as luciversion, branch as luciname } from 'luci.version';
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import { default as LuCIRuntime } from 'luci.runtime';
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import { urldecode } from 'luci.http';
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let ubus = connect();
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let uci = cursor();
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let indexcache = "/tmp/luci-indexcache";
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let http, runtime, tree, luabridge;
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function error404(msg) {
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http.status(404, 'Not Found');
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try {
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runtime.render('error404', { message: msg ?? 'Not found' });
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}
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catch {
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http.header('Content-Type', 'text/plain; charset=UTF-8');
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http.write(msg ?? 'Not found');
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}
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return false;
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}
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function error500(msg, ex) {
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if (!http.eoh) {
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http.status(500, 'Internal Server Error');
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http.header('Content-Type', 'text/html; charset=UTF-8');
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}
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try {
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runtime.render('error500', {
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title: ex?.type ?? 'Runtime exception',
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message: replace(
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msg,
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/(\s)((\/[A-Za-z0-9_.-]+)+:\d+|\[string "[^"]+"\]:\d+)/g,
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'$1<code>$2</code>'
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),
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exception: ex
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});
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}
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catch {
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http.write('<!--]]>--><!--\'>--><!--">-->\n');
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http.write(`<p>${trim(ex)}</p>\n`);
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if (ex) {
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http.write(`<p>${trim(ex.message)}</p>\n`);
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http.write(`<pre>${trim(ex.stacktrace[0].context)}</pre>\n`);
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}
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}
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exit(0);
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}
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function load_luabridge(optional) {
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if (luabridge == null) {
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try {
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luabridge = require('lua');
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}
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catch (ex) {
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luabridge = false;
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if (!optional)
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error500('No Lua runtime installed');
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}
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}
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return luabridge;
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}
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function determine_request_language() {
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let lang = uci.get('luci', 'main', 'lang') || 'auto';
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if (lang == 'auto') {
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for (let tag in split(http.getenv('HTTP_ACCEPT_LANGUAGE'), ',')) {
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tag = split(trim(split(tag, ';')?.[0]), '-');
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if (tag) {
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let cc = tag[1] ? `${tag[0]}_${lc(tag[1])}` : null;
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if (cc && uci.get('luci', 'languages', cc)) {
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lang = cc;
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break;
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}
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else if (uci.get('luci', 'languages', tag[0])) {
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lang = tag[0];
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break;
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}
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}
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}
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}
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if (lang == 'auto')
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lang = 'en';
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if (load_catalog(lang, '/usr/lib/lua/luci/i18n'))
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change_catalog(lang);
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return lang;
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}
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function determine_version() {
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let res = { luciname, luciversion };
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for (let f = open("/etc/os-release"), l = f?.read?.("line"); l; l = f.read?.("line")) {
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let kv = split(l, '=', 2);
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switch (kv[0]) {
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case 'NAME':
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res.distname = trim(kv[1], '"\' \n');
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break;
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case 'VERSION':
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res.distversion = trim(kv[1], '"\' \n');
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break;
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case 'HOME_URL':
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res.disturl = trim(kv[1], '"\' \n');
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break;
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case 'BUILD_ID':
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res.distrevision = trim(kv[1], '"\' \n');
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break;
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}
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}
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return res;
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}
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function read_jsonfile(path, defval) {
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let rv;
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try {
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rv = json(open(path, "r"));
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}
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catch (e) {
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rv = defval;
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}
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return rv;
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}
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function read_cachefile(file, reader) {
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let euid = getuid(),
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fstat = stat(file),
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fuid = fstat?.uid,
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perm = fstat?.perm;
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if (euid != fuid ||
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perm?.group_read || perm?.group_write || perm?.group_exec ||
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perm?.other_read || perm?.other_write || perm?.other_exec)
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return null;
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return reader(file);
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}
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function check_fs_depends(spec) {
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for (let path, kind in spec) {
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if (kind == 'directory') {
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if (!length(lsdir(path)))
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return false;
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}
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else if (kind == 'executable') {
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let fstat = stat(path);
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if (fstat?.type != 'file' || fstat?.user_exec == false)
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return false;
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}
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else if (kind == 'file') {
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let fstat = stat(path);
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if (fstat?.type != 'file')
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return false;
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}
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}
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return true;
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}
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function check_uci_depends_options(conf, s, opts) {
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if (type(opts) == 'string') {
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return (s['.type'] == opts);
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}
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else if (opts === true) {
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for (let option, value in s)
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if (ord(option) != 46)
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return true;
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}
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else if (type(opts) == 'object') {
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for (let option, value in opts) {
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let sval = s[option];
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if (type(sval) == 'array') {
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if (!(value in sval))
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return false;
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}
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else if (value === true) {
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if (sval == null)
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return false;
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}
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else {
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if (sval != value)
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return false;
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}
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}
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}
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return true;
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}
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function check_uci_depends_section(conf, sect) {
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for (let section, options in sect) {
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let stype = match(section, /^@([A-Za-z0-9_-]+)$/);
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if (stype) {
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let found = false;
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uci.load(conf);
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uci.foreach(conf, stype[1], (s) => {
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if (check_uci_depends_options(conf, s, options)) {
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found = true;
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return false;
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}
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});
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if (!found)
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return false;
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}
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else {
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let s = uci.get_all(conf, section);
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if (!s || !check_uci_depends_options(conf, s, options))
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return false;
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}
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}
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return true;
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}
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function check_uci_depends(conf) {
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for (let config, values in conf) {
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if (values == true) {
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let found = false;
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uci.load(config);
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uci.foreach(config, null, () => { found = true });
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if (!found)
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return false;
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}
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else if (type(values) == 'object') {
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if (!check_uci_depends_section(config, values))
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return false;
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}
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}
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return true;
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}
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function check_depends(spec) {
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if (type(spec?.depends?.fs) in ['array', 'object']) {
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let satisfied = false;
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let alternatives = (type(spec.depends.fs) == 'array') ? spec.depends.fs : [ spec.depends.fs ];
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for (let alternative in alternatives) {
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if (check_fs_depends(alternative)) {
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satisfied = true;
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break;
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}
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}
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if (!satisfied)
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return false;
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}
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if (type(spec?.depends?.uci) in ['array', 'object']) {
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let satisfied = false;
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let alternatives = (type(spec.depends.uci) == 'array') ? spec.depends.uci : [ spec.depends.uci ];
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for (let alternative in alternatives) {
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if (check_uci_depends(alternative)) {
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satisfied = true;
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break;
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}
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}
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if (!satisfied)
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return false;
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}
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return true;
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}
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function check_acl_depends(require_groups, groups) {
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if (length(require_groups)) {
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let writable = false;
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for (let group in require_groups) {
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let read = ('read' in groups?.[group]);
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let write = ('write' in groups?.[group]);
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if (!read && !write)
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return null;
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if (write)
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writable = true;
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}
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return writable;
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}
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return true;
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}
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function hash_filelist(files) {
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let hashval = 0x1b756362;
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for (let file in files) {
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let st = stat(file);
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if (st)
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hashval = hash(sprintf("%x|%x|%x", st.ino, st.mtime, st.size), hashval);
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}
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return hashval;
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}
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function build_pagetree() {
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let tree = { action: { type: 'firstchild' } };
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let schema = {
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action: 'object',
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auth: 'object',
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cors: 'bool',
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depends: 'object',
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order: 'int',
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setgroup: 'string',
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setuser: 'string',
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title: 'string',
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wildcard: 'bool',
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firstchild_ineligible: 'bool'
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};
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let files = glob('/usr/share/luci/menu.d/*.json', '/usr/lib/lua/luci/controller/*.lua', '/usr/lib/lua/luci/controller/*/*.lua');
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let cachefile;
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if (indexcache) {
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cachefile = sprintf('%s.%08x.json', indexcache, hash_filelist(files));
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let res = read_cachefile(cachefile, read_jsonfile);
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if (res)
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return res;
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for (let path in glob(indexcache + '.*.json'))
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unlink(path);
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}
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for (let file in files) {
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let data;
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if (substr(file, -5) == '.json')
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data = read_jsonfile(file);
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else if (load_luabridge(true))
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data = runtime.call('luci.dispatcher', 'process_lua_controller', file);
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else
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warn(`Lua controller ${file} present but no Lua runtime installed.\n`);
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if (type(data) == 'object') {
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for (let path, spec in data) {
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if (type(spec) == 'object') {
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let node = tree;
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for (let s in match(path, /[^\/]+/g)) {
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if (s[0] == '*') {
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node.wildcard = true;
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break;
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}
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node.children ??= {};
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node.children[s[0]] ??= {};
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node = node.children[s[0]];
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}
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if (node !== tree) {
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for (let k, t in schema)
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if (type(spec[k]) == t)
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node[k] = spec[k];
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node.satisfied = check_depends(spec);
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}
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}
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}
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}
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}
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if (cachefile) {
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let fd = open(cachefile, 'w', 0600);
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if (fd) {
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fd.write(tree);
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fd.close();
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}
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}
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return tree;
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}
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function menu_json(acl) {
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tree ??= build_pagetree();
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return tree;
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}
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function ctx_append(ctx, name, node) {
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ctx.path ??= [];
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push(ctx.path, name);
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ctx.acls ??= [];
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push(ctx.acls, ...(node?.depends?.acl || []));
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ctx.auth = node.auth || ctx.auth;
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ctx.cors = node.cors || ctx.cors;
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ctx.suid = node.setuser || ctx.suid;
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ctx.sgid = node.setgroup || ctx.sgid;
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return ctx;
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}
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function session_retrieve(sid, allowed_users) {
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let sdat = ubus.call("session", "get", { ubus_rpc_session: sid });
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let sacl = ubus.call("session", "access", { ubus_rpc_session: sid });
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if (type(sdat?.values?.token) == 'string' &&
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(!length(allowed_users) || sdat?.values?.username in allowed_users)) {
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// uci:set_session_id(sid)
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return {
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sid,
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data: sdat.values,
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acls: length(sacl) ? sacl : {}
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};
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}
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return null;
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}
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function randomid(num_bytes) {
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let bytes = [];
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while (num_bytes-- > 0)
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push(bytes, sprintf('%02x', rand() % 256));
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return join('', bytes);
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}
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function syslog(prio, msg) {
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warn(sprintf("[%s] %s\n", prio, msg));
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}
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function session_setup(user, pass, path) {
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let timeout = uci.get('luci', 'sauth', 'sessiontime');
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let login = ubus.call("session", "login", {
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username: user,
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password: pass,
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timeout: timeout ? +timeout : null
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});
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if (type(login?.ubus_rpc_session) == 'string') {
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ubus.call("session", "set", {
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ubus_rpc_session: login.ubus_rpc_session,
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values: { token: randomid(16) }
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});
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syslog("info", sprintf("luci: accepted login on /%s for %s from %s",
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join('/', path), user || "?", http.getenv("REMOTE_ADDR") || "?"));
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return session_retrieve(login.ubus_rpc_session);
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}
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syslog("info", sprintf("luci: failed login on /%s for %s from %s",
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join('/', path), user || "?", http.getenv("REMOTE_ADDR") || "?"));
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}
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function check_authentication(method) {
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let m = match(method, /^([[:alpha:]]+):(.+)$/);
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let sid;
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switch (m?.[1]) {
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case 'cookie':
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sid = http.getcookie(m[2]);
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break;
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case 'param':
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sid = http.formvalue(m[2]);
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break;
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case 'query':
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sid = http.formvalue(m[2], true);
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break;
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}
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return sid ? session_retrieve(sid) : null;
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}
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function is_authenticated(auth) {
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for (let method in auth?.methods) {
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let session = check_authentication(method);
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if (session)
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return session;
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}
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return null;
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}
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function node_weight(node) {
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let weight = min(node.order ?? 9999, 9999);
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if (node.auth?.login)
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weight += 10000;
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return weight;
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}
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function clone(src) {
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switch (type(src)) {
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case 'array':
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return map(src, clone);
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case 'object':
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let dest = {};
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for (let k, v in src)
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dest[k] = clone(v);
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return dest;
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default:
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return src;
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}
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}
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function resolve_firstchild(node, session, login_allowed, ctx) {
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let candidate, candidate_ctx;
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for (let name, child in node.children) {
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if (!child.satisfied)
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continue;
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if (!session)
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session = is_authenticated(node.auth);
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let cacl = child.depends?.acl;
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let login = login_allowed || child.auth?.login;
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if (login || check_acl_depends(cacl, session?.acls?.["access-group"]) != null) {
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if (child.title && type(child.action) == "object") {
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let child_ctx = ctx_append(clone(ctx), name, child);
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if (child.action.type == "firstchild") {
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if (!candidate || node_weight(candidate) > node_weight(child)) {
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let have_grandchild = resolve_firstchild(child, session, login, child_ctx);
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if (have_grandchild) {
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candidate = child;
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candidate_ctx = child_ctx;
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}
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}
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}
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else if (!child.firstchild_ineligible) {
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if (!candidate || node_weight(candidate) > node_weight(child)) {
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candidate = child;
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candidate_ctx = child_ctx;
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}
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}
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}
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}
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}
|
|
|
|
if (!candidate)
|
|
return false;
|
|
|
|
for (let k, v in candidate_ctx)
|
|
ctx[k] = v;
|
|
|
|
return true;
|
|
}
|
|
|
|
function resolve_page(tree, request_path) {
|
|
let node = tree;
|
|
let login = false;
|
|
let session = null;
|
|
let ctx = {};
|
|
|
|
for (let i, s in request_path) {
|
|
node = node.children?.[s];
|
|
|
|
if (!node?.satisfied)
|
|
break;
|
|
|
|
ctx_append(ctx, s, node);
|
|
|
|
if (!session)
|
|
session = is_authenticated(node.auth);
|
|
|
|
if (!login && node.auth?.login)
|
|
login = true;
|
|
|
|
if (node.wildcard) {
|
|
ctx.request_args = [];
|
|
ctx.request_path = ctx.path ? [ ...ctx.path ] : [];
|
|
|
|
while (++i < length(request_path)) {
|
|
push(ctx.request_path, request_path[i]);
|
|
push(ctx.request_args, request_path[i]);
|
|
}
|
|
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (node?.action?.type == 'firstchild')
|
|
resolve_firstchild(node, session, login, ctx);
|
|
|
|
ctx.acls ??= {};
|
|
ctx.path ??= [];
|
|
ctx.request_args ??= [];
|
|
ctx.request_path ??= request_path ? [ ...request_path ] : [];
|
|
|
|
ctx.authsession = session?.sid;
|
|
ctx.authtoken = session?.data?.token;
|
|
ctx.authuser = session?.data?.username;
|
|
ctx.authacl = session?.acls;
|
|
|
|
node = tree;
|
|
|
|
for (let s in ctx.path) {
|
|
node = node.children[s];
|
|
assert(node, "Internal node resolve error");
|
|
}
|
|
|
|
return { node, ctx, session };
|
|
}
|
|
|
|
function require_post_security(target, args) {
|
|
if (target?.type == 'arcombine')
|
|
return require_post_security(length(args) ? target?.targets?.[1] : target?.targets?.[0], args);
|
|
|
|
if (type(target?.post) == 'object') {
|
|
for (let param_name, required_val in target.post) {
|
|
let request_val = http.formvalue(param_name);
|
|
|
|
if ((type(required_val) == 'string' && request_val != required_val) ||
|
|
(required_val == true && request_val == null))
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
return (target?.post == true);
|
|
}
|
|
|
|
function test_post_security(authtoken) {
|
|
if (http.getenv("REQUEST_METHOD") != "POST") {
|
|
http.status(405, "Method Not Allowed");
|
|
http.header("Allow", "POST");
|
|
|
|
return false;
|
|
}
|
|
|
|
if (http.formvalue("token") != authtoken) {
|
|
http.status(403, "Forbidden");
|
|
runtime.render("csrftoken");
|
|
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
function build_url(...path) {
|
|
let url = [ http.getenv('SCRIPT_NAME') ?? '' ];
|
|
|
|
for (let p in path)
|
|
if (match(p, /^[A-Za-z0-9_%.\/,;-]+$/))
|
|
push(url, '/', p);
|
|
|
|
if (length(url) == 1)
|
|
push(url, '/');
|
|
|
|
return join('', url);
|
|
}
|
|
|
|
function lookup(...segments) {
|
|
let node = menu_json();
|
|
let path = [];
|
|
|
|
for (let segment in segments)
|
|
for (let name in split(segment, '/'))
|
|
push(path, name);
|
|
|
|
for (let name in path) {
|
|
node = node.children[name];
|
|
|
|
if (!node)
|
|
return null;
|
|
|
|
if (node.leaf)
|
|
break;
|
|
}
|
|
|
|
return { node, url: build_url(...path) };
|
|
}
|
|
|
|
function rollback_pending() {
|
|
const now = time();
|
|
const rv = ubus.call('session', 'get', {
|
|
ubus_rpc_session: '00000000000000000000000000000000',
|
|
keys: [ 'rollback' ]
|
|
});
|
|
|
|
if (type(rv?.values?.rollback?.token) != 'string' ||
|
|
type(rv?.values?.rollback?.session) != 'string' ||
|
|
type(rv?.values?.rollback?.timeout) != 'int' ||
|
|
rv.values.rollback.timeout <= now)
|
|
return false;
|
|
|
|
return {
|
|
remaining: rv.values.rollback.timeout - now,
|
|
session: rv.values.rollback.session,
|
|
token: rv.values.rollback.token
|
|
};
|
|
}
|
|
|
|
let dispatch;
|
|
|
|
function run_action(request_path, lang, tree, resolved, action) {
|
|
switch (action?.type) {
|
|
case 'template':
|
|
runtime.render(action.path, {});
|
|
break;
|
|
|
|
case 'view':
|
|
runtime.render('view', { view: action.path });
|
|
break;
|
|
|
|
case 'call':
|
|
http.write(render(() => {
|
|
runtime.call(action.module, action.function,
|
|
...(action.parameters ?? []),
|
|
...resolved.ctx.request_args
|
|
);
|
|
}));
|
|
break;
|
|
|
|
case 'function':
|
|
const mod = require(action.module);
|
|
|
|
assert(type(mod[action.function]) == 'function',
|
|
`Module '${action.module}' does not export function '${action.function}'`);
|
|
|
|
http.write(render(() => {
|
|
call(mod[action.function], mod, runtime.env,
|
|
...(action.parameters ?? []),
|
|
...resolved.ctx.request_args
|
|
);
|
|
}));
|
|
break;
|
|
|
|
case 'alias':
|
|
dispatch(http, [ ...split(action.path, '/'), ...resolved.ctx.request_args ]);
|
|
break;
|
|
|
|
case 'rewrite':
|
|
dispatch(http, [
|
|
...splice([ ...request_path ], 0, action.remove),
|
|
...split(action.path, '/'),
|
|
...resolved.ctx.request_args
|
|
]);
|
|
break;
|
|
|
|
case 'firstchild':
|
|
if (!length(tree.children))
|
|
error404("No root node was registered, this usually happens if no module was installed.\n" +
|
|
"Install luci-mod-admin-full and retry. " +
|
|
"If the module is already installed, try removing the /tmp/luci-indexcache file.");
|
|
else
|
|
error404(`No page is registered at '/${join("/", resolved.ctx.request_path)}'.\n` +
|
|
"If this url belongs to an extension, make sure it is properly installed.\n" +
|
|
"If the extension was recently installed, try removing the /tmp/luci-indexcache file.");
|
|
break;
|
|
|
|
default:
|
|
error500(`Unhandled action type ${action?.type ?? '?'}`);
|
|
}
|
|
}
|
|
|
|
dispatch = function(_http, path) {
|
|
http = _http;
|
|
|
|
let version = determine_version();
|
|
let lang = determine_request_language();
|
|
|
|
runtime = LuCIRuntime({
|
|
http,
|
|
ubus,
|
|
uci,
|
|
ctx: {},
|
|
version,
|
|
config: {
|
|
main: uci.get_all('luci', 'main') ?? {},
|
|
apply: uci.get_all('luci', 'apply') ?? {}
|
|
},
|
|
dispatcher: {
|
|
rollback_pending,
|
|
is_authenticated,
|
|
load_luabridge,
|
|
lookup,
|
|
menu_json,
|
|
build_url,
|
|
randomid,
|
|
error404,
|
|
error500,
|
|
lang
|
|
},
|
|
striptags,
|
|
entityencode,
|
|
_: (...args) => translate(...args) ?? args[0],
|
|
N_: (...args) => ntranslate(...args) ?? (n[0] == 1 ? n[1] : n[2]),
|
|
});
|
|
|
|
try {
|
|
let menu = menu_json();
|
|
|
|
path ??= map(match(http.getenv('PATH_INFO'), /[^\/]+/g), m => m[0]);
|
|
|
|
let resolved = resolve_page(menu, path);
|
|
|
|
runtime.env.ctx = resolved.ctx;
|
|
runtime.env.node = resolved.node;
|
|
|
|
if (length(resolved.ctx.auth)) {
|
|
let session = is_authenticated(resolved.ctx.auth);
|
|
|
|
if (!session && resolved.ctx.auth.login) {
|
|
let user = http.getenv('HTTP_AUTH_USER');
|
|
let pass = http.getenv('HTTP_AUTH_PASS');
|
|
|
|
if (user == null && pass == null) {
|
|
user = http.formvalue('luci_username');
|
|
pass = http.formvalue('luci_password');
|
|
}
|
|
|
|
if (user != null && pass != null)
|
|
session = session_setup(user, pass, resolved.ctx.request_path);
|
|
|
|
if (!session) {
|
|
resolved.ctx.path = [];
|
|
|
|
http.status(403, 'Forbidden');
|
|
http.header('X-LuCI-Login-Required', 'yes');
|
|
|
|
let scope = { duser: 'root', fuser: user };
|
|
|
|
try {
|
|
runtime.render(`themes/${basename(runtime.env.media)}/sysauth`, scope);
|
|
}
|
|
catch (e) {
|
|
runtime.render('sysauth', scope);
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
let cookie_name = (http.getenv('HTTPS') == 'on') ? 'sysauth_https' : 'sysauth_http',
|
|
cookie_secure = (http.getenv('HTTPS') == 'on') ? '; secure' : '';
|
|
|
|
http.header('Set-Cookie', `${cookie_name}=${session.sid}; path=${build_url()}; SameSite=strict; HttpOnly${cookie_secure}`);
|
|
http.redirect(build_url(...resolved.ctx.request_path));
|
|
|
|
return;
|
|
}
|
|
|
|
if (!session) {
|
|
http.status(403, 'Forbidden');
|
|
http.header('X-LuCI-Login-Required', 'yes');
|
|
|
|
return;
|
|
}
|
|
|
|
resolved.ctx.authsession ??= session.sid;
|
|
resolved.ctx.authtoken ??= session.data?.token;
|
|
resolved.ctx.authuser ??= session.data?.username;
|
|
resolved.ctx.authacl ??= session.acls;
|
|
}
|
|
|
|
if (length(resolved.ctx.acls)) {
|
|
let perm = check_acl_depends(resolved.ctx.acls, resolved.ctx.authacl?.['access-group']);
|
|
|
|
if (perm == null) {
|
|
http.status(403, 'Forbidden');
|
|
|
|
return;
|
|
}
|
|
|
|
if (resolved.node)
|
|
resolved.node.readonly = !perm;
|
|
}
|
|
|
|
let action = resolved.node.action;
|
|
|
|
if (action?.type == 'arcombine')
|
|
action = length(resolved.ctx.request_args) ? action.targets?.[1] : action.targets?.[0];
|
|
|
|
if (resolved.ctx.cors && http.getenv('REQUEST_METHOD') == 'OPTIONS') {
|
|
http.status(200, 'OK');
|
|
http.header('Access-Control-Allow-Origin', http.getenv('HTTP_ORIGIN') ?? '*');
|
|
http.header('Access-Control-Allow-Methods', 'GET, POST, OPTIONS');
|
|
|
|
return;
|
|
}
|
|
|
|
if (require_post_security(action) && !test_post_security(resolved.ctx.authtoken))
|
|
return;
|
|
|
|
run_action(path, lang, menu, resolved, action);
|
|
}
|
|
catch (ex) {
|
|
error500('Unhandled exception during request dispatching', ex);
|
|
}
|
|
};
|
|
|
|
export default dispatch;
|