1 files changed, 5 insertions, 1 deletions
diff --git a/zencore/httpserver.cpp b/zencore/httpserver.cpp
index 52389a11b..22cba4d75 100644
--- a/zencore/httpserver.cpp
+++ b/zencore/httpserver.cpp
@@ -1044,15 +1044,19 @@ public:
 
 		// Call http.sys API to receive the remaining data
 
+		static const uint64_t kMaxBytesPerApiCall = 1 * 1024 * 1024;
+
 		while (BytesToRead)
 		{
 			ULONG BytesRead = 0;
 
+			const uint64_t BytesToReadThisCall = zen::Min(BytesToRead, kMaxBytesPerApiCall);
+
 			ULONG ApiResult = HttpReceiveRequestEntityBody(m_HttpTx.RequestQueueHandle(),
 														   HttpReq->RequestId,
 														   0, /* Flags */
 														   ReadPointer,
-														   (ULONG)BytesToRead,
+														   gsl::narrow<ULONG>(BytesToReadThisCall),
 														   &BytesRead,
 														   NULL /* Overlapped */
 			);