verify at least one image is exist

maplibre · Jan 3, 2025 · c351153 · c351153
1 parent a17c5fc
commit c351153
Show file tree

Hide file tree

Showing 2 changed files with 7 additions and 0 deletions.
diff --git a/martin/src/cog/errors.rs b/martin/src/cog/errors.rs
@@ -11,6 +11,9 @@ pub enum CogError {
     #[error("Requested zoom level {0} from file {1} is out of range. Possible zoom levels are {2} to {3}")]
     ZoomOutOfRange(u8, PathBuf, u8, u8),
 
+    #[error("Couldn't find any image in the tiff file: {0}")]
+    NoImagesFound(PathBuf),
+
     #[error("Couldn't seek to ifd number {1} (0 based indexing) in tiff file {2}: {0}")]
     IfdSeekFailed(TiffError, usize, PathBuf),
 

diff --git a/martin/src/cog/mod.rs b/martin/src/cog/mod.rs
@@ -324,6 +324,10 @@ fn get_meta(path: &PathBuf) -> Result<Meta, FileError> {
         zoom_and_tile_across_down.insert(zoom, (tiles_across, tiles_down));
     }
 
+    if images_ifd.is_empty() {
+        Err(CogError::NoImagesFound(path.clone()))?;
+    }
+
     Ok(Meta {
         min_zoom: 0,
         max_zoom: images_ifd.len() as u8 - 1,