add support for heic images

app/images.py

@@ -1,9 +1,21 @@
 from dataclasses import dataclass
 from io import BytesIO
+from pathlib import Path
+import shutil
+import subprocess
+from tempfile import TemporaryDirectory
 
 from fastapi import HTTPException, UploadFile
 from PIL import Image, UnidentifiedImageError
 
+try:
+    from pillow_heif import register_heif_opener
+
+    register_heif_opener()
+    HEIF_SUPPORT_ENABLED = True
+except ImportError:
+    HEIF_SUPPORT_ENABLED = False
+
 
 MAX_IMAGE_SIDE = 1600
 JPEG_QUALITY = 80
@@ -22,6 +34,8 @@ def process_upload(file: UploadFile | None) -> ProcessedImage | None:
     if file is None or not file.filename:
         return None
 
+    suffix = Path(file.filename).suffix.lower()
+
     try:
         raw_bytes = file.file.read()
         if not raw_bytes:
@@ -30,6 +44,9 @@ def process_upload(file: UploadFile | None) -> ProcessedImage | None:
         with Image.open(BytesIO(raw_bytes)) as source_image:
             processed_image = _prepare_image(source_image)
     except UnidentifiedImageError as exc:
+        if suffix in {".heic", ".heif"}:
+            processed_image = _process_heic_with_fallback(raw_bytes, suffix)
+            return processed_image
         raise HTTPException(status_code=400, detail="上传的文件不是合法图片") from exc
     except HTTPException:
         raise
@@ -71,3 +88,34 @@ def _strip_metadata_and_convert(source_image: Image.Image) -> Image.Image:
         return source_image.convert("RGB")
 
     return source_image.copy()
+
+
+def _process_heic_with_fallback(raw_bytes: bytes, suffix: str) -> ProcessedImage:
+    if shutil.which("sips") is None:
+        if HEIF_SUPPORT_ENABLED:
+            raise HTTPException(status_code=400, detail="HEIC/HEIF 图片处理失败，请尝试更换图片")
+        raise HTTPException(
+            status_code=400,
+            detail="当前环境无法处理 HEIC/HEIF，请先转换为 JPG 或 PNG 后再上传",
+        )
+
+    with TemporaryDirectory() as temp_dir:
+        source_path = Path(temp_dir) / f"upload{suffix}"
+        output_path = Path(temp_dir) / "converted.jpg"
+        source_path.write_bytes(raw_bytes)
+
+        result = subprocess.run(
+            ["sips", "-s", "format", "jpeg", str(source_path), "--out", str(output_path)],
+            capture_output=True,
+            text=True,
+            check=False,
+        )
+
+        if result.returncode != 0 or not output_path.exists():
+            raise HTTPException(status_code=400, detail="HEIC/HEIF 图片处理失败，请尝试更换图片")
+
+        try:
+            with Image.open(output_path) as converted_image:
+                return _prepare_image(converted_image)
+        except UnidentifiedImageError as exc:
+            raise HTTPException(status_code=400, detail="HEIC/HEIF 图片处理失败，请尝试更换图片") from exc

tests/test_app.py

@@ -2,7 +2,9 @@ from io import BytesIO
 from pathlib import Path
 
 import app.db as db_module
+import app.images as images_module
 from PIL import Image
+from fastapi import UploadFile
 
 from app.models import Box, Item, SubItem
 
@@ -572,6 +574,24 @@ def test_broken_image_processing_returns_400_and_keeps_image_fields_empty(client
     assert updated_box.image_height is None
 
 
+def test_heic_upload_returns_clear_error_if_heif_support_is_unavailable(monkeypatch):
+    heic_file = UploadFile(filename="sample.heic", file=BytesIO(b"not-a-real-heic"))
+
+    def fake_open(*args, **kwargs):
+        raise images_module.UnidentifiedImageError("cannot identify image file")
+
+    monkeypatch.setattr(images_module, "HEIF_SUPPORT_ENABLED", False)
+    monkeypatch.setattr(images_module.Image, "open", fake_open)
+    monkeypatch.setattr(images_module.shutil, "which", lambda command: None)
+
+    try:
+        images_module.process_upload(heic_file)
+        assert False, "Expected HEIC upload to raise HTTPException"
+    except Exception as exc:
+        assert getattr(exc, "status_code", None) == 400
+        assert "HEIC/HEIF" in getattr(exc, "detail", "")
+
+
 def test_can_search_box_by_name(client, db_session):
     box = Box(name="冬季衣物箱")
     db_session.add(box)