Check and use correct paths for generating HLS playlist

This also should prevent generating the playlist if it already exists
and uses a better ffmpeg command for transcoding the video.

src/main.rs

@@ -126,12 +126,17 @@ async fn generate_video(_claims: Claims, body: web::Json<ThumbnailRequest>) -> i
     let filename = PathBuf::from(&body.path);
 
     if let Some(name) = filename.file_stem() {
-        let filename = name.to_str().expect("Filename should conver to string");
-        create_playlist(&body.path, &format!("tmp/{}.m3u8", filename));
+        let filename = name.to_str().expect("Filename should convert to string");
+        let playlist = format!("tmp/{}.m3u8", filename);
+        if let Some(path) = is_valid_path(&body.path) {
+            create_playlist(&path.to_str().unwrap(), &playlist);
+        } else {
+            return HttpResponse::BadRequest().finish();
+        }
 
-        HttpResponse::Ok()
+        HttpResponse::Ok().json(playlist)
     } else {
-        HttpResponse::BadRequest()
+        HttpResponse::BadRequest().finish()
     }
 }
 
@@ -149,10 +154,10 @@ async fn stream_video(request: HttpRequest, path: web::Query<ThumbnailRequest>)
 
 #[get("/video/{path}")]
 async fn get_video_part(request: HttpRequest, path: web::Path<ThumbnailRequest>) -> impl Responder {
-    let playlist = &path.path;
-    println!("Video part: {}", playlist);
+    let part = &path.path;
+    println!("Video part: {}", part);
 
-    if let Ok(file) = NamedFile::open(String::from("tmp/") + playlist) {
+    if let Ok(file) = NamedFile::open(String::from("tmp/") + part) {
         file.into_response(&request).unwrap()
     } else {
         HttpResponse::NotFound().finish()