Add RequestHeaders property to Cesium3DTileset

CHANGES.md

@@ -1,5 +1,10 @@
 # Change Log
 
+### ? - ?
+
+##### Additions :tada:
+- Added `RequestHeaders` property to `Cesium3DTileset`, allowing per-tileset headers to be specified.
+
 ### v2.12.0 - 2025-01-02
 
 ##### Breaking Changes :mega:

Source/CesiumRuntime/Private/Cesium3DTileset.cpp

@@ -385,6 +385,31 @@ void ACesium3DTileset::SetTilesetSource(ETilesetSource InSource) {
   }
 }
 
+bool CompareMaps(
+    const TMap<FString, FString>& Lhs,
+    const TMap<FString, FString>& Rhs) {
+  if (Lhs.Num() != Rhs.Num()) {
+    return false;
+  }
+
+  for (auto& [Key, Value] : Lhs) {
+    const FString* RhsVal = Rhs.Find(Key);
+    if (!RhsVal || *RhsVal != Value) {
+      return false;
+    }
+  }
+
+  return true;
+}
+
+void ACesium3DTileset::SetRequestHeaders(
+    const TMap<FString, FString>& InRequestHeaders) {
+  if (!CompareMaps(InRequestHeaders, this->RequestHeaders)) {
+    this->DestroyTileset();
+    this->RequestHeaders = RequestHeaders;
+  }
+}
+
 void ACesium3DTileset::SetUrl(const FString& InUrl) {
   if (InUrl != this->Url) {
     if (this->TilesetSource == ETilesetSource::FromUrl) {
@@ -1287,6 +1312,14 @@ void ACesium3DTileset::LoadTileset() {
 
   options.contentOptions.applyTextureTransform = false;
 
+  options.requestHeaders.reserve(this->RequestHeaders.Num());
+
+  for (auto& [Key, Value] : this->RequestHeaders) {
+    options.requestHeaders.emplace_back(CesiumAsync::IAssetAccessor::THeader{
+        std::string(TCHAR_TO_UTF8(*Key)),
+        std::string(TCHAR_TO_UTF8(*Value))});
+  }
+
   switch (this->TilesetSource) {
   case ETilesetSource::FromEllipsoid:
     UE_LOG(LogCesium, Log, TEXT("Loading tileset from ellipsoid"));

Source/CesiumRuntime/Public/Cesium3DTileset.h

@@ -764,6 +764,16 @@ class CESIUMRUNTIME_API ACesium3DTileset : public AActor {
       meta = (EditCondition = "TilesetSource==ETilesetSource::FromCesiumIon"))
   UCesiumIonServer* CesiumIonServer;
 
+  /**
+   * Headers to be attached to each request made for this tileset.
+   */
+  UPROPERTY(
+      EditAnywhere,
+      BlueprintGetter = GetRequestHeaders,
+      BlueprintSetter = SetRequestHeaders,
+      Category = "Cesium")
+  TMap<FString, FString> RequestHeaders;
+
   /**
    * Check if the Cesium ion token used to access this tileset is working
    * correctly, and fix it if necessary.
@@ -972,6 +982,12 @@ class CESIUMRUNTIME_API ACesium3DTileset : public AActor {
   UFUNCTION(BlueprintSetter, Category = "Cesium")
   void SetUrl(const FString& InUrl);
 
+  UFUNCTION(BlueprintGetter, Category = "Cesium")
+  TMap<FString, FString> GetRequestHeaders() const { return RequestHeaders; }
+
+  UFUNCTION(BlueprintSetter, Category = "Cesium")
+  void SetRequestHeaders(const TMap<FString, FString>& InRequestHeaders);
+
   UFUNCTION(BlueprintGetter, Category = "Cesium")
   int64 GetIonAssetID() const { return IonAssetID; }