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/*
Spacebar: A FOSS re-implementation and extension of the Discord.com backend.
Copyright (C) 2023 Spacebar and Spacebar 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 bodyParser, { OptionsJson } from "body-parser";
import { NextFunction, Request, Response } from "express";
import { HTTPError } from "lambert-server";
const errorMessages: { [key: string]: [string, number] } = {
"entity.too.large": ["Request body too large", 413],
"entity.parse.failed": ["Invalid JSON body", 400],
"entity.verify.failed": ["Entity verification failed", 403],
"request.aborted": ["Request aborted", 400],
"request.size.invalid": ["Request size did not match content length", 400],
"stream.encoding.set": ["Stream encoding should not be set", 500],
"stream.not.readable": ["Stream is not readable", 500],
"parameters.too.many": ["Too many parameters", 413],
"charset.unsupported": ["Unsupported charset", 415],
"encoding.unsupported": ["Unsupported content encoding", 415],
};
export function BodyParser(opts?: OptionsJson) {
const jsonParser = bodyParser.json(opts);
return (req: Request, res: Response, next: NextFunction) => {
if (!req.headers["content-type"])
req.headers["content-type"] = "application/json";
jsonParser(req, res, (err) => {
if (err) {
const [message, status] = errorMessages[err.type] || [
"Invalid Body",
400,
];
const errorMessage =
message.includes("charset") || message.includes("encoding")
? `${message} "${err.charset || err.encoding}"`
: message;
return next(new HTTPError(errorMessage, status));
}
next();
});
};
}
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