UKismetSystemLibrary::LaunchExternalUrl
#include "Kismet/KismetSystemLibrary.h"
Access: public
Specifiers: staticUFUNCTIONBlueprintCallable
Description
Opens an external URL in the platform's default web browser, but only if its domain matches one of the provided allowlist strings.
Caveats & Gotchas
- • If the URL's host doesn't match any entry in InDomainStrings, the call silently does nothing — there's no error or return value to detect a rejected launch.
- • This is the safer alternative to LaunchURL when the URL originates from remote/user-controlled data, since it constrains which domains can be opened.
- • Domain matching semantics (exact vs. subdomain) aren't documented in the header — test with your actual allowlist strings rather than assuming wildcard behavior.
Signature
static void LaunchExternalUrl(const TArray<FString>& InDomainStrings, const FString& URL)Parameters
| Name | Type | Description | Default |
|---|---|---|---|
| InDomainStrings | const TArray<FString>& | Allowlist of domains the URL's host must match against before it will be launched. | — |
| URL | const FString& | The URL to open if it matches the domain allowlist. | — |
Return Type
void Example
Open a URL only if it's on an approved domain C++
TArray<FString> AllowedDomains = { TEXT("unrealengine.com"), TEXT("epicgames.com") };
UKismetSystemLibrary::LaunchExternalUrl(AllowedDomains, RemoteProvidedUrl);Tags
Version History
Introduced in: 4.0
| Version | Status | Notes |
|---|---|---|
| 5.6 | stable | — |
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