Dwelling/files.js

139 lines
3.6 KiB
JavaScript

const fs = require("fs");
const path = require("path");
const Koa = require("koa");
const koaPug = require("koa-pug");
const koaRouter = require("koa-router");
const koaRange = require("koa-range");
//const koaServe = require("koa-static");
const FileType = require("file-type");
const config = require("./config");
const util = require("./util");
const { type } = require("os");
const { ENOENT, ECONNRESET } = require("constants");
const sizeUnits = [ "B", "KiB", "MiB", "GiB" ];
function makeCurrentPathField(path) {
let current = "";
if (path.endsWith("/"))
path = path.slice(1, path.length-1);
const path_parts = path.split("/");
current = `<a href="/">root</a>`;
for (i = 0; i < path_parts.length; ++i) {
let lnk = "";
for (j = 0; j < i+1; ++j) {
lnk += `/${path_parts[j]}`;
}
current += `/<a href="${encodeURI(lnk)}/">${path_parts[i]}</a>`;
}
return current;
}
function convertSize(size) {
let i = 0;
for (; size > 1024; size /= 1024) { ++i; }
return [i > 0 ? size.toFixed(2) : size, sizeUnits[i]];
}
function fileType(name) {
if (name.endsWith("txt") || name.endsWith("md"))
return "text/plain";
return "octet-stream";
}
async function getDirectoryList(dir_path, base_url) {
let dirs = [];
let files = [];
let d = await fs.promises.opendir(dir_path);
for await (const dirent of d) {
const stat = fs.lstatSync(path.join(dir_path, dirent.name));
const [s, u] = convertSize(stat.size);
if (stat.isDirectory())
dirs.push({
name: dirent.name,
link: `${base_url}${encodeURIComponent(dirent.name)}/`,
datetime: util.datetime(stat.mtime, util.formats.file_date),
size: "DIR",
size_unit: '' });
else
files.push({
name: dirent.name,
link: `${base_url}${encodeURIComponent(dirent.name)}`,
datetime: util.datetime(stat.mtime, util.formats.file_date),
size: +s,
size_unit: u });
}
const sort_by_name = (a, b) => {
if (a.name > b.name)
return 1;
else if (a.name < b.name)
return -1;
return 0;
}
dirs.sort(sort_by_name);
files.sort(sort_by_name);
return dirs.concat(files);
}
function setRoutes(router) {
router.get('/(.*)?', async (ctx, next) => {
if (ctx.originalUrl.startsWith("/assets") || ctx.originalUrl.startsWith("/shared")) {
await next();
return;
}
const file_path = path.join(config.files.file_path, decodeURI(ctx.originalUrl));
let stat = fs.lstatSync(file_path);
if (stat.isDirectory()) {
await ctx.render('index', {
title: "/ Files",
description: "File share.",
host: util.getBaseHost(ctx.header.host),
current_path: makeCurrentPathField(decodeURI(ctx.originalUrl)),
items: await getDirectoryList(file_path, ctx.originalUrl) });
} else {
let f = await FileType.fromStream(fs.createReadStream(file_path));
if (f === undefined)
ctx.type = fileType(file_path);
else
ctx.type = f.mime;
ctx.set("Content-Length", stat.size);
const stream = fs.createReadStream(file_path);
// let ch = 0;
// stream.on("end", () => { });
// stream.on("data", (chunk) => { ch += chunk.length; });
ctx.body = stream;
}
});
}
module.exports = () => {
const app = new Koa();
const pug = new koaPug({
viewPath: path.join(__dirname, "views", "files"),
locals: {
moment: date => util.datetime(date, util.formats.file_date) },
app: app
});
const radio_router = koaRouter();
setRoutes(radio_router);
app
.use(koaRange)
.use(radio_router.routes())
// .use(koaServe(path.join("static", "shared")))
// .use(koaServe(path.join("static", "files")))
.on("error", err => { if (!err.code == ECONNRESET || !err.code == ENOENT) console.log(err.code); })
.listen(config.files.port, config.files.host);
return app;
}