From e88f7a8f196c9f8bd21c0ef9cced0f439ca18cd9 Mon Sep 17 00:00:00 2001
From: Malte Polley <48649152+Zirkonium88@users.noreply.github.com>
Date: Wed, 1 Jul 2026 15:21:14 +0200
Subject: [PATCH] =?UTF-8?q?=F0=9F=93=A7=20fix:=20Add=20.eml=20(message/rfc?=
 =?UTF-8?q?822)=20Support=20to=20File=20Upload=20(#13989)?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

* fix: add .eml (message/rfc822) support to file upload

* chore: restore package lock metadata

---------

Co-authored-by: Malte Polley <ahabsfriend@posteo.de>
Co-authored-by: Danny Avila <danny@librechat.ai>
---
 packages/data-provider/src/file-config.spec.ts | 17 +++++++++++++++++
 packages/data-provider/src/file-config.ts      |  4 ++++
 2 files changed, 21 insertions(+)

diff --git a/packages/data-provider/src/file-config.spec.ts b/packages/data-provider/src/file-config.spec.ts
index b564f5a913..c5380c12b6 100644
--- a/packages/data-provider/src/file-config.spec.ts
+++ b/packages/data-provider/src/file-config.spec.ts
@@ -66,6 +66,19 @@ describe('inferMimeType', () => {
   it('should reject raw text/x-markdown without normalization', () => {
     expect(baseFileConfig.checkType('text/x-markdown')).toBe(false);
   });
+
+  it('should infer message/rfc822 from extension when browser type is empty', () => {
+    expect(inferMimeType('email.eml', '')).toBe('message/rfc822');
+  });
+
+  it('should pass through message/rfc822 when browser reports it', () => {
+    expect(inferMimeType('email.eml', 'message/rfc822')).toBe('message/rfc822');
+  });
+
+  it('should produce a type accepted by checkType for .eml files', () => {
+    const normalized = inferMimeType('test.eml', '');
+    expect(baseFileConfig.checkType(normalized)).toBe(true);
+  });
 });
 
 describe('applicationMimeTypes', () => {
@@ -148,6 +161,10 @@ describe('supportedMimeTypes', () => {
   ])('ODF type flows through supportedMimeTypes: %s', (mimeType) => {
     expect(checkSupported(mimeType)).toBe(true);
   });
+
+  it('message/rfc822 (.eml) flows through supportedMimeTypes', () => {
+    expect(checkSupported('message/rfc822')).toBe(true);
+  });
 });
 
 describe('documentParserMimeTypes', () => {
diff --git a/packages/data-provider/src/file-config.ts b/packages/data-provider/src/file-config.ts
index 06f6b4806d..8ca650c7e4 100644
--- a/packages/data-provider/src/file-config.ts
+++ b/packages/data-provider/src/file-config.ts
@@ -69,6 +69,7 @@ export const fullMimeTypesList = [
   'application/vnd.oasis.opendocument.graphics',
   'image/svg',
   'image/svg+xml',
+  'message/rfc822',
   // Video formats
   'video/mp4',
   'video/avi',
@@ -228,6 +229,8 @@ export const supportedMimeTypes = [
   audioMimeTypes,
   /** Supported by LC Code Interpreter API */
   /^image\/(svg|svg\+xml)$/,
+  /** .eml email files */
+  /^message\/rfc822$/,
 ];
 
 export const codeInterpreterMimeTypes = [
@@ -284,6 +287,7 @@ export const codeTypeMapping: { [key: string]: string } = {
   cljs: 'text/plain', // .cljs - ClojureScript source
   cljc: 'text/plain', // .cljc - Clojure common source
   elm: 'text/plain', // .elm - Elm source
+  eml: 'message/rfc822', // .eml - Email message (RFC 822)
   erl: 'text/plain', // .erl - Erlang source
   hrl: 'text/plain', // .hrl - Erlang header
   ex: 'text/plain', // .ex - Elixir source