🤖 Merge PR DefinitelyTyped#74638 expressjs_multer/support-for-unicode-headers by @alex-Arc

Co-authored-by: Victor <doc999tor@gmail.com>

Author: alex-Arc

types/multer/index.d.ts

@@ -211,6 +211,12 @@ declare namespace multer {
         } | undefined;
         /** Preserve the full path of the original filename rather than the basename. (Default: false) */
         preservePath?: boolean | undefined;
+        /**
+         * For multipart forms, the default character set to use for values of
+         * part header parameters (e.g. filename) that are not extended
+         * parameters (that contain an explicit charset). (Default: latin1)
+         */
+        defParamCharset?: string | undefined;
         /**
          * Optional function to control which files are uploaded. This is called
          * for every file that is processed.

types/multer/multer-tests.ts

@@ -15,6 +15,19 @@ const upload = multer({
 upload; // $ExpectType Multer
 assert.strictEqual(upload.constructor.name, "Multer");
 
+const upload_with_defParamCharset = multer({
+    dest: "uploads/",
+    fileFilter: (req, file, cb) => {
+        cb(null, false);
+        cb(null, true);
+        cb(new Error(`I don't have a clue!`));
+    },
+    defParamCharset: "utf8",
+});
+
+upload_with_defParamCharset; // $ExpectType Multer
+assert.strictEqual(upload_with_defParamCharset.constructor.name, "Multer");
+
 const app = express();
 
 app.post(

types/multer/package.json

@@ -1,7 +1,7 @@
 {
     "private": true,
     "name": "@types/multer",
-    "version": "2.0.9999",
+    "version": "2.1.9999",
     "projects": [
         "https://github.com/expressjs/multer"
     ],