96 lines
2.7 KiB
TypeScript
96 lines
2.7 KiB
TypeScript
import { Router, Response, Request } from "express";
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import fetch from "node-fetch";
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import { HTTPError } from "lambert-server";
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import { Snowflake } from "@fosscord/util";
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import { storage } from "../util/Storage";
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import FileType, { stream } from "file-type";
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import { Config } from "@fosscord/util";
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import sharp from "sharp";
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// TODO: somehow handle the deletion of images posted to the /external route
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const router = Router();
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const DEFAULT_FETCH_OPTIONS: any = {
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redirect: "follow",
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follow: 1,
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headers: {
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"user-agent":
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"Mozilla/5.0 (compatible Fosscordbot/0.1; +https://fosscord.com)",
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},
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size: 1024 * 1024 * 8,
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compress: true,
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method: "GET",
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};
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router.post("/", async (req: Request, res: Response) => {
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if (req.headers.signature !== Config.get().security.requestSignature)
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throw new HTTPError("Invalid request signature");
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if (!req.body) throw new HTTPError("Invalid Body");
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const { url } = req.body;
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if (!url || typeof url !== "string") throw new HTTPError("Invalid url");
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const id = Snowflake.generate();
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try {
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const response = await fetch(url, DEFAULT_FETCH_OPTIONS);
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const buffer = await response.buffer();
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await storage.set(`/external/${id}`, buffer);
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res.send({ id });
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} catch (error) {
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throw new HTTPError("Couldn't fetch website");
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}
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});
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router.get("/:id", async (req: Request, res: Response) => {
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const { id } = req.params;
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const file = await storage.get(`/external/${id}`);
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if (!file) throw new HTTPError("File not found");
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const result = await FileType.fromBuffer(file);
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res.set("Content-Type", result?.mime);
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return res.send(file);
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});
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// this method is gross lol don't care
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router.get("/resize/:url", async (req: Request, res: Response) => {
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const url = decodeURIComponent(req.params.url);
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const { width, height } = req.query;
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if (!width || !height) throw new HTTPError("Must provide width and height");
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const w = parseInt(width as string);
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const h = parseInt(height as string);
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if (w < 1 || h < 1) throw new HTTPError("Width and height must be greater than 0");
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const { resizeHeightMax, resizeWidthMax } = Config.get().cdn;
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if (resizeHeightMax && resizeWidthMax &&
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(w > resizeWidthMax || h > resizeHeightMax))
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throw new HTTPError(`Width and height must not exceed ${resizeWidthMax}, ${resizeHeightMax}`);
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let buffer;
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try {
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const response = await fetch(url, DEFAULT_FETCH_OPTIONS);
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buffer = await response.buffer();
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}
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catch (e) {
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throw new HTTPError("Couldn't fetch website");
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}
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const resizedBuffer = await sharp(buffer)
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.resize(parseInt(width as string), parseInt(height as string), {
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fit: "inside",
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})
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.png()
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.toBuffer();
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res.setHeader("Content-Disposition", "attachment");
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res.setHeader("Content-Type", "image/png");
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return res.end(resizedBuffer);
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});
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export default router;
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