Merge pull request alexrudall#262 from obie/main

stream option should take any callable not just a proc

Author: alexrudall

lib/openai/http.rb

@@ -8,9 +8,11 @@ def get(path:)
 
     def json_post(path:, parameters:)
       to_json(conn.post(uri(path: path)) do |req|
-        if parameters[:stream].is_a?(Proc)
+        if parameters[:stream].respond_to?(:call)
           req.options.on_data = to_json_stream(user_proc: parameters[:stream])
           parameters[:stream] = true # Necessary to tell OpenAI to stream.
+        elsif parameters[:stream]
+          raise ArgumentError, "stream must be callable"
         end
 
         req.headers = headers