Update watch.cr

JSON::ParseException

src/invidious/routes/watch.cr

@@ -294,15 +294,28 @@ module Invidious::Routes::Watch
     return error_template(403, "Administrator has disabled this endpoint.")
   end
 
-    title = env.params.body["title"]? || ""
+  title = env.params.body["title"] || ""
-    video_id = env.params.body["id"]? || ""
+  video_id = env.params.body["id"] || ""
-    selection = env.params.body["download_widget"]?
+  selection = env.params.body["download_widget"]
 
   if title.empty? || video_id.empty? || selection.nil?
     return error_template(400, "Missing form data")
   end
 
-    download_widget = JSON.parse(selection)
+  begin
+    # Check if the JSON data starts with '{' (indicating an object) or '[' (indicating an array).
+    json_data = selection.strip
+    if json_data.start_with?('{', '[')
+      download_widget = JSON.parse(json_data)
+      # Your existing code for processing the JSON data goes here
+    else
+      # Handle the case where the JSON data is not correctly formatted.
+      return error_template(400, "Invalid JSON format")
+    end
+  rescue JSON::ParserError => e
+    # Handle any JSON parsing errors
+    return error_template(400, "Invalid JSON: #{e.message}")
+  end
 
   extension = download_widget["ext"].as_s
   filename = "#{title}-#{video_id}.#{extension}"
@@ -313,7 +326,7 @@ module Invidious::Routes::Watch
   env.params.body.delete("download_widget")
 
   # Pass form parameters as URL parameters for the handlers of both
-    # /latest_version and /api/v1/captions. This avoids an un-necessary
+  # /latest_version and /api/v1/captions. This avoids an unnecessary
   # redirect and duplicated (and hazardous) sanity checks.
   if label = download_widget["label"]?
     # URL params specific to /api/v1/captions/:id
@@ -334,4 +347,5 @@ module Invidious::Routes::Watch
     return error_template(400, "Invalid label or itag")
   end
 end
+
 end