Dont panic.

Handle errors in image scaling properly.

src/main.rs

@@ -174,10 +174,17 @@ fn show_image<'mw>(req: &mut Request, mut res: Response<'mw>)
                     "l" => Some(1200),
                     _ => None
                 } {
-                let buf = req.photos().get_scaled_image(photo, size, size);
+                    match req.photos().get_scaled_image(photo, size, size) {
+                        Ok(buf) => {
                             res.set(MediaType::Jpeg);
                             res.set(Expires(HttpDate(time::now() + Duration::days(14))));
                             return res.send(buf);
+                        },
+                        Err(err) => {
+                            return res.error(StatusCode::InternalServerError,
+                                             format!("{}", err));
+                        }
+                    }
                 }
             }
         }

src/photosdir.rs

@@ -2,7 +2,7 @@ use std::path::{Path, PathBuf};
 use std::fs;
 use std::io;
 use image::open as image_open;
-use image::{FilterType, ImageFormat, GenericImage};
+use image::{FilterType, ImageFormat, GenericImage, ImageError};
 use rexif::{self, ExifData};
 
 use models::Photo;
@@ -20,10 +20,10 @@ impl PhotosDir {
 
     #[allow(dead_code)]
     pub fn get_scaled_image(&self, photo: Photo, width: u32, height: u32)
-                        -> Vec<u8> {
+                        -> Result<Vec<u8>, ImageError> {
         let path = self.basedir.join(photo.path);
         info!("Should open {:?}", path);
-        let img = image_open(path).unwrap();
+        let img = try!(image_open(path));
         let img =
             if width < img.width() || height < img.height() {
                 img.resize(width, height, FilterType::CatmullRom)
@@ -43,8 +43,8 @@ impl PhotosDir {
         };
         // TODO Put the icon in some kind of cache!
         let mut buf : Vec<u8> = Vec::new();
-        img.save(&mut buf, ImageFormat::JPEG).unwrap();
+        try!(img.save(&mut buf, ImageFormat::JPEG));
-        buf
+        Ok(buf)
     }
 
     #[allow(dead_code)]