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// Copyright 2022 ilotterytea
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
import express, {
RequestHandler
} from "express";
import favicon from "serve-favicon";
import pck from "./package.json";
import i_opts from "./options.json";
import multer from "multer";
import crypto from "crypto";
import { existsSync, readdirSync, readFileSync } from "fs";
import mime from "mime";
const router = express.Router();
// To store files on local disk:
const storage = multer.diskStorage({
// File destination:
destination: "./static/i",
// Creation of file name:
filename: (req, file, callback) => {
// Compare file size and limit:
if (file.size > i_opts.maxFileSizeInBytes) {
callback(Error("The file size is larger than the maximum set value."), "");
return;
}
// Name pattern:
var pattern = "number/dir";
switch (pattern) {
// A name for the file based on where it will be positioned amongst the other files after uploading:
case "number/dir":
const img_id = readdirSync("./static/i").length + 1;
var maxzero = 5;
var zerostring = "";
for (var i = 0; i < maxzero; i++) { zerostring = zerostring + "0"; }
zerostring = zerostring.slice(img_id.toString().length, zerostring.length);
callback(null, zerostring + img_id.toString() + "." + mime.extension(file.mimetype));
break;
// Random byte name:
case "crypto/hex":
crypto.randomBytes(5 /* <-- Character length */, (err, raw) => {
if (err) return callback(err, "");
callback(null, raw.toString("hex") + "." + mime.extension(file.mimetype));
});
break;
default:
break;
}
}
});
// Image uploader:
const upload = multer({
storage: storage,
fileFilter(req, file, callback) {
if (i_opts.allowedMIMETypes.includes(file.mimetype)) {
callback(null, true);
} else {
callback(null, false);
console.debug("The extension of this file isn't allowed.");
}
},
})
// Main page:
router.get("/", async (req, res) => {
var Page: string = readFileSync(`${__dirname}/static/html/index.html`, {encoding: "utf-8"});
Page = Page.replace("{{AboutFileHoster}}", `Running on notdankenough/fh@${pck.version}!`);
res.send(Page);
});
// Viewing files.
router.get("/i/:id", async (req, res) => {
if (!(existsSync("./static/i/" + req.params.id))) {
return res.json({
status: 404,
reason: "The file " + req.params.id + " not found!",
kitty: "https://http.cat/404"
}).status(404);
}
return res.sendFile(`${__dirname}/static/i/${req.params.id}`);
});
// POST request to upload a file and then send its name:
router.post("/dank_upload", upload.single("file"), (req, res) => {
var name = req.file?.filename;
// Required for some external tools:
if (req.headers["no-redirect"]) {
return res.json({
name: name
}).status(200);
}
res.redirect("/i/" + name);
});
export default router;
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