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server: better upload limit error

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Ref: FoundKeyGang/FoundKey#293
This commit is contained in:
Johann150 2022-12-19 21:29:29 +01:00
parent bd68096ea9
commit 99c459a21a
Signed by untrusted user: Johann150
GPG key ID: 9EE6577A2A06F8F1
1 changed files with 23 additions and 1 deletions
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24
packages/backend/src/server/api/index.ts
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@ -16,6 +16,7 @@ import signup from './private/signup.js';
import signin from './private/signin.js';
import signupPending from './private/signup-pending.js';
import { oauth } from './common/oauth.js';
import { ApiError } from './error.js';
// Init app
const app = new Koa();
@ -40,6 +41,27 @@ const upload = multer({
files: 1,
},
});
/**
* Wrap multer to return an appropriate API error when something goes wrong, e.g. the file is too big.
*/
type KoaMiddleware = (ctx: Koa.Context, next: () => Promise<void>) => Promise<void>;
const wrapped = upload.single('file');
function uploadWrapper(endpoint: string): KoaMiddleware {
return (ctx: Koa.Context, next: () => Promise<void>): Promise<void> => {
// pass a fake "next" so we can separate multer errors from other API errors
return wrapped(ctx, () => {})
.then(
() => next(),
(err) => {
let apiErr = new ApiError('INTERNAL_ERROR', err);
if (err?.code === 'LIMIT_FILE_SIZE') {
apiErr = new ApiError('FILE_TOO_BIG', { maxFileSize: config.maxFileSize || 262144000 });
}
apiErr.apply(ctx, endpoint);
}
);
};
}
// Init router
const router = new Router();
@ -49,7 +71,7 @@ const router = new Router();
*/
for (const endpoint of endpoints) {
if (endpoint.meta.requireFile) {
router.post(`/${endpoint.name}`, upload.single('file'), handler.bind(null, endpoint));
router.post(`/${endpoint.name}`, uploadWrapper(endpoint.name), handler.bind(null, endpoint));
} else {
// 後方互換性のため
if (endpoint.name.includes('-')) {