Add a /history/{prompt_id} endpoint.

execution.py

@@ -728,9 +728,14 @@ class PromptQueue:
                     return True
         return False
 
-    def get_history(self):
+    def get_history(self, prompt_id=None):
         with self.mutex:
-            return copy.deepcopy(self.history)
+            if prompt_id is None:
+                return copy.deepcopy(self.history)
+            elif prompt_id in self.history:
+                return {prompt_id: copy.deepcopy(self.history[prompt_id])}
+            else:
+                return {}
 
     def wipe_history(self):
         with self.mutex:

server.py

@@ -372,6 +372,11 @@ class PromptServer():
         async def get_history(request):
             return web.json_response(self.prompt_queue.get_history())
 
+        @routes.get("/history/{prompt_id}")
+        async def get_history(request):
+            prompt_id = request.match_info.get("prompt_id", None)
+            return web.json_response(self.prompt_queue.get_history(prompt_id=prompt_id))
+
         @routes.get("/queue")
         async def get_queue(request):
             queue_info = {}