JustArchiNET/ArchiSteamFarm · error · HttpRequestException

response is null!

Error message

response is null!

What it means

First guard inside the ArchiWebHandler inventory retry loop: if UrlGetToJsonObjectWithSession returns null (no HTTP response object at all), an HttpRequestException 'response is null!' is thrown immediately. This indicates the HTTP layer could not produce a response envelope, distinct from a server-returned error status.

Source

Thrown at ArchiSteamFarm/Steam/Integration/ArchiWebHandler.cs:342

		int rateLimitingDelay = (ASF.GlobalConfig?.InventoryLimiterDelay ?? GlobalConfig.DefaultInventoryLimiterDelay) * 1000;

		while (true) {
			Uri request = new(SteamCommunityURL, $"/inventory/{steamID}/{appID}/{contextID}?l={language}&count={itemsCountPerRequest}{(startAssetID > 0 ? $"&start_assetid={startAssetID}" : "")}");

			await ASF.InventorySemaphore.WaitAsync().ConfigureAwait(false);

			ObjectResponse<InventoryResponse>? response = null;

			try {
				for (byte i = 0; (i < WebBrowser.MaxTries) && (response?.Content is not { Result: EResult.OK } || !response.StatusCode.IsSuccessCode()); i++) {
					if ((i > 0) && (rateLimitingDelay > 0)) {
						await Task.Delay(rateLimitingDelay).ConfigureAwait(false);
					}

					response = await UrlGetToJsonObjectWithSession<InventoryResponse>(request, requestOptions: WebBrowser.ERequestOptions.ReturnClientErrors | WebBrowser.ERequestOptions.ReturnServerErrors | WebBrowser.ERequestOptions.AllowInvalidBodyOnErrors | WebBrowser.ERequestOptions.SteamWafWorkarounds, rateLimitingDelay: rateLimitingDelay).ConfigureAwait(false);

					if (response == null) {
						throw new HttpRequestException(Strings.FormatErrorObjectIsNull(nameof(response)));
					}

					if (response.StatusCode.IsClientErrorCode()) {
						throw new HttpRequestException(Strings.FormatWarningFailedWithError(response.StatusCode), null, response.StatusCode);
					}

					if (response.StatusCode.IsServerErrorCode()) {
						if (string.IsNullOrEmpty(response.Content?.ErrorText)) {
							// This is a generic server error without a reason, try again
							continue;
						}

						Bot.ArchiLogger.LogGenericDebug(Strings.FormatWarningFailedWithError(response.Content.ErrorText));

						// Try to interpret the failure reason and see if we should try again
						switch (response.Content.ErrorCode) {
							case EResult.Busy:
							case EResult.DuplicateRequest:

View on GitHub (pinned to fe57c4129f)

Solutions

1. Check ASF logs for the transport-level cause (proxy, TLS, DNS).
2. Verify network connectivity and Steam community reachability.
3. Retry; transient transport failures often clear.
4. Correct any WebProxy / Proxy config in GlobalConfig.

// Verify reachability before issuing the inventory request.
if (!await webHandler.IsUrlReachable(SteamCommunityUrl)) return;

try { await foreach (var a in webHandler.GetInventoryAsync(steamID)) { /* ... */ } }
catch (HttpRequestException ex) when (ex.Message.Contains("response is null")) {
    // transport failure; check proxy/connectivity, retry with backoff
}

When it happens

Trigger: The web request returns a null ObjectResponse — e.g. request aborted, transport-level failure before any status code, or an internal helper returning null on a non-recoverable transport error.

Common situations: Network/DNS failure, TLS handshake failure, proxy misconfiguration, connection reset, or ASF's WebBrowser returning null for an unsupported/cancelled request.

Related errors

• Failed due to error: Client.IsConnected
• Failed due to error: {0}
• response is null!
• Failed!
• Failed due to error: {0}

AI-assisted analysis of JustArchiNET/ArchiSteamFarm@fe57c4129f (2026-08-13). Data as JSON: /api/errors/2470d1713fea120d. Report an issue: GitHub.