Fix preview images that need rotation

cista/preview.py

@@ -6,6 +6,7 @@ from urllib.parse import unquote
 from PIL import Image
 from sanic import Blueprint, raw
 from sanic.exceptions import Forbidden, NotFound
+from sanic.log import logger
 
 from cista import config
 from cista.util.filename import sanitize
@@ -16,7 +17,7 @@ bp = Blueprint("preview", url_prefix="/preview")
 @bp.get("/<path:path>")
 async def preview(req, path):
     """Preview a file"""
-    width = int(req.query_string) if req.query_string else 768
+    width = int(req.query_string) if req.query_string else 1024
     rel = PurePosixPath(sanitize(unquote(path)))
     path = config.config.path / rel
     if not path.is_file():
@@ -34,6 +35,17 @@ def process_image(path, maxsize):
     img = Image.open(path)
     w, h = img.size
     img.thumbnail((min(w, maxsize), min(h, maxsize)))
+    # Fix rotation based on EXIF data
+    try:
+        rotate_values = {3: 180, 6: 270, 8: 90}
+        exif = img._getexif()
+        if exif:
+            orientation = exif.get(274)
+            if orientation in rotate_values:
+                logger.debug(f"Rotating preview {path} by {rotate_values[orientation]}")
+                img = img.rotate(rotate_values[orientation], expand=True)
+    except Exception as e:
+        logger.error(f"Error rotating preview image: {e}")
     # Save as webp
     imgdata = io.BytesIO()
     img.save(imgdata, format="webp", quality=70, method=6)