cancel http request

app/scripts/api/backend.gd

@@ -3,7 +3,9 @@ extends Node
 
 
 func request(url: String, callback: Callable,
-		body: Dictionary = {}, method: int = HTTPClient.METHOD_GET) -> Error:
+		body: Dictionary = {}, method: int = HTTPClient.METHOD_GET,
+		cancel_callback: Array = []) -> Error:
+	
 	var data = JSON.stringify(body)
 	var headers = []
 	
@@ -12,7 +14,12 @@ func request(url: String, callback: Callable,
 	add_child(http)
 	
 	var err = http.request(url, headers, method, data)
+	cancel_callback.append(func(): http.cancel_request(); remove_child(http))
 	var res = await http.request_completed
+	
+	# If calling object is freed without canceling request
+	if not callback.is_valid(): return ERR_INVALID_PARAMETER
+	
 	callback.call(res[0], res[1], res[2], res[3])
 	remove_child(http)
 	
@@ -20,7 +27,9 @@ func request(url: String, callback: Callable,
 
 
 func request_raw(url: String, callback: Callable,
-		data: PackedByteArray, method: int = HTTPClient.METHOD_GET) -> Error:
+		data: PackedByteArray, method: int = HTTPClient.METHOD_GET,
+		cancel_callback: Array = []) -> Error:
+	
 	var headers = []
 	
 	var http = HTTPRequest.new()
@@ -28,7 +37,12 @@ func request_raw(url: String, callback: Callable,
 	add_child(http)
 	
 	var err = http.request_raw(url, headers, method, data)
+	cancel_callback.append(func(): http.cancel_request(); remove_child(http))
 	var res = await http.request_completed
+	
+	# If calling object is freed without canceling request
+	if not callback.is_valid(): return ERR_INVALID_PARAMETER
+	
 	callback.call(res[0], res[1], res[2], res[3])
 	remove_child(http)
 	

app/scripts/loading/gate_loader.gd

@@ -38,7 +38,7 @@ func load_gate(config_url: String) -> void:
 func load_image(c_gate: ConfigGate) -> void:
 	gate.image = await FileDownloader.download(c_gate.image_url)
 	gate_events.gate_image_loaded_emit(gate)
-	# finish without image
+	# Finish without image
 
 
 func load_resources(c_gate: ConfigGate) -> void:

app/scripts/ui/search/prompt_results.gd

@@ -10,6 +10,7 @@ class_name PromptResults
 var prompt_size: float
 var result_str: String
 var last_query: String
+var cancel_callbacks: Array = []
 
 
 func _ready() -> void:
@@ -48,11 +49,15 @@ func prompt_request(query: String) -> void:
 			result_str = body.get_string_from_utf8()
 		else: Debug.logclr("Request prompt failed. Code " + str(code), Color.RED)
 	
-	var err = await Backend.request(url, callback)
+	var err = await Backend.request(url, callback, {}, HTTPClient.METHOD_GET, cancel_callbacks)
 	if err != HTTPRequest.RESULT_SUCCESS: Debug.logclr("Cannot send request prompt", Color.RED)
 
 
 func clear() -> void:
+	for callback in cancel_callbacks:
+		callback.call()
+	cancel_callbacks.clear()
+	
 	for child in get_children():
 		child.queue_free()
 		remove_child(child)