From 91f140716fd607bc9fd3bf69570ae580578cb9b5 Mon Sep 17 00:00:00 2001
From: Abhinavexist <abhinav@interfaze.ai>
Date: Sat, 18 Jul 2026 03:56:19 +0530
Subject: [PATCH] fix: forward computed MIME as file() format (#3)

file()/video() computed the MIME only for the blacklist check and set
format only when the caller passed one. For an https-URL file/video part
with no explicit format, the server had no data-URL MIME to read and fell
back to application/octet-stream, undercutting file/video support.

Forward the computed MIME as format (the server uses file.format verbatim
as mediaType). video() and auto_part inherit this via file(). Unknown
extensions still yield no format, preserving the octet-stream fallback.
---
 src/interfaze/_inputs.py        | 41 +++++++++++++++++++++++++--------
 tests/test_inputs_and_client.py | 14 +++++++++++
 2 files changed, 45 insertions(+), 10 deletions(-)

diff --git a/src/interfaze/_inputs.py b/src/interfaze/_inputs.py
index c43069a..714c4e1 100644
--- a/src/interfaze/_inputs.py
+++ b/src/interfaze/_inputs.py
@@ -10,14 +10,35 @@
 BytesLike = Union[bytes, bytearray]
 
 _EXT_MIME = {
-    "png": "image/png", "jpg": "image/jpeg", "jpeg": "image/jpeg", "webp": "image/webp",
-    "gif": "image/gif", "bmp": "image/bmp", "heic": "image/heic", "heif": "image/heif",
-    "pdf": "application/pdf", "csv": "text/csv", "tsv": "text/tab-separated-values",
-    "xml": "application/xml", "json": "application/json", "txt": "text/plain",
-    "md": "text/markdown", "markdown": "text/markdown", "yaml": "application/yaml", "yml": "application/yaml",
-    "wav": "audio/wav", "mp3": "audio/mpeg", "m4a": "audio/mp4", "ogg": "audio/ogg", "flac": "audio/flac",
-    "mp4": "video/mp4", "mov": "video/quicktime", "webm": "video/webm", "avi": "video/x-msvideo",
-    "mkv": "video/x-matroska", "3gp": "video/3gpp",
+    "png": "image/png",
+    "jpg": "image/jpeg",
+    "jpeg": "image/jpeg",
+    "webp": "image/webp",
+    "gif": "image/gif",
+    "bmp": "image/bmp",
+    "heic": "image/heic",
+    "heif": "image/heif",
+    "pdf": "application/pdf",
+    "csv": "text/csv",
+    "tsv": "text/tab-separated-values",
+    "xml": "application/xml",
+    "json": "application/json",
+    "txt": "text/plain",
+    "md": "text/markdown",
+    "markdown": "text/markdown",
+    "yaml": "application/yaml",
+    "yml": "application/yaml",
+    "wav": "audio/wav",
+    "mp3": "audio/mpeg",
+    "m4a": "audio/mp4",
+    "ogg": "audio/ogg",
+    "flac": "audio/flac",
+    "mp4": "video/mp4",
+    "mov": "video/quicktime",
+    "webm": "video/webm",
+    "avi": "video/x-msvideo",
+    "mkv": "video/x-matroska",
+    "3gp": "video/3gpp",
 }
 
 
@@ -63,8 +84,8 @@ def file(src: str, *, filename: Optional[str] = None, format: Optional[str] = No
     f: Dict[str, Any] = {"file_data": src}
     if filename:
         f["filename"] = filename
-    if format:
-        f["format"] = format
+    if mime:
+        f["format"] = mime
     return {"type": "file", "file": f}
 
 
diff --git a/tests/test_inputs_and_client.py b/tests/test_inputs_and_client.py
index 34eb8d7..b65891d 100644
--- a/tests/test_inputs_and_client.py
+++ b/tests/test_inputs_and_client.py
@@ -22,6 +22,19 @@ def test_file_part():
     )
 
 
+def test_file_forwards_computed_mime():
+    assert inputs.file("https://x.com/d.pdf")["file"]["format"] == "application/pdf"
+
+
+def test_video_forwards_mp4_mime():
+    part = inputs.video("https://x.com/clip.mp4")
+    assert part["type"] == "file" and part["file"]["format"] == "video/mp4"
+
+
+def test_file_unknown_ext_omits_format():
+    assert "format" not in inputs.file("https://x.com/page")["file"]
+
+
 def test_audio_uses_input_audio():
     part = inputs.audio("https://x.com/a.wav")
     assert part["type"] == "input_audio" and part["input_audio"]["format"] == "wav"
@@ -51,6 +64,7 @@ def test_auto_part_routing():
     assert inputs.auto_part("https://x.com/a.wav")["type"] == "input_audio"
     assert inputs.auto_part("https://x.com/a.pdf")["type"] == "file"
     assert inputs.auto_part("https://x.com/a.mp4")["type"] == "file"
+    assert inputs.auto_part("https://x.com/a.mp4")["file"]["format"] == "video/mp4"
 
 
 # ---- client surface ----