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/*
Fosscord: A FOSS re-implementation and extension of the Discord.com backend.
Copyright (C) 2023 Fosscord and Fosscord Contributors
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published
by the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
import { Router, Response, Request } from "express";
import { Config, Snowflake } from "@fosscord/util";
import { storage } from "../util/Storage";
import FileType from "file-type";
import { HTTPError } from "lambert-server";
import { multer } from "../util/multer";
import imageSize from "image-size";
const router = Router();
const SANITIZED_CONTENT_TYPE = [
"text/html",
"text/mhtml",
"multipart/related",
"application/xhtml+xml",
];
router.post(
"/:channel_id",
multer.single("file"),
async (req: Request, res: Response) => {
if (req.headers.signature !== Config.get().security.requestSignature)
throw new HTTPError("Invalid request signature");
if (!req.file) throw new HTTPError("file missing");
const { buffer, mimetype, size, originalname } = req.file;
const { channel_id } = req.params;
const filename = originalname
.replaceAll(" ", "_")
.replace(/[^a-zA-Z0-9._]+/g, "");
const id = Snowflake.generate();
const path = `attachments/${channel_id}/${id}/${filename}`;
const endpoint =
Config.get()?.cdn.endpointPublic || "http://localhost:3001";
await storage.set(path, buffer);
let width;
let height;
if (mimetype.includes("image")) {
const dimensions = imageSize(buffer);
if (dimensions) {
width = dimensions.width;
height = dimensions.height;
}
}
const file = {
id,
content_type: mimetype,
filename: filename,
size,
url: `${endpoint}/${path}`,
width,
height,
};
return res.json(file);
},
);
router.get(
"/:channel_id/:id/:filename",
async (req: Request, res: Response) => {
const { channel_id, id, filename } = req.params;
// const { format } = req.query;
const path = `attachments/${channel_id}/${id}/${filename}`;
const file = await storage.get(path);
if (!file) throw new HTTPError("File not found");
const type = await FileType.fromBuffer(file);
let content_type = type?.mime || "application/octet-stream";
if (SANITIZED_CONTENT_TYPE.includes(content_type)) {
content_type = "application/octet-stream";
}
res.set("Content-Type", content_type);
res.set("Cache-Control", "public, max-age=31536000");
return res.send(file);
},
);
router.delete(
"/:channel_id/:id/:filename",
async (req: Request, res: Response) => {
if (req.headers.signature !== Config.get().security.requestSignature)
throw new HTTPError("Invalid request signature");
const { channel_id, id, filename } = req.params;
const path = `attachments/${channel_id}/${id}/${filename}`;
await storage.delete(path);
return res.send({ success: true });
},
);
export default router;
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