I want to use a web API. Can UDK send arbitrary dynamically constructed string to any URI and listen for a response?

Legacy UDK Programming and UnrealScript
1

I’ve never done anything network-related with UDK. I do have Steamworks working, but anything Steamworks does is behind the scenes in steam_api64.dll. I’d like to use a web API (Twitch, specifically) and I’m wondering if UDK has built-in functionality for sending arbitrary string to any URI and listening for a response. Thank you for any information you can send me.

Edit: I don’t know if UDK has this built-in, but maybe this is what I should use instead just because I already have a working Steamworks integration. ISteamHTTP Interface (Steamworks Documentation) Any thoughts about that?

2

Yes, you can use the HttpRequestInterface class provided in Unrealscript. Example:

//-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
//Send request to a url.
//-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
function RetrieveDataStoreFromWeb()
{
    local HttpRequestInterface Request;
    request = class'HttpFactory'.static.CreateRequest();
    request.SetHeader("X-Game-Agent", "game=MyGame, engine=UE3, version=1.1");
    request.SetURL("http://www.yourUrl.com");
    request.SetVerb("GET");
    request.SetProcessRequestCompleteDelegate(HtttpRequestComplete);

    request.ProcessRequest();
}

//-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
//Handle the response.
//-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
function HtttpRequestComplete(HttpRequestInterface request, HttpResponseInterface response, bool bWasSuccessful)
{
    local String responseStr;

    if (bWasSuccessful) {
        responseStr = response.GetContentAsString();
    }
    //Do whatever with the response string...
}

I use this for things like managing servers that i flag as “verified”, etc.

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