Allow specifying request headers in TilesetOptions

Author: azrogers

Cesium3DTilesSelection/include/Cesium3DTilesSelection/TilesetOptions.h

@@ -2,6 +2,7 @@
 
 #include "Library.h"
 
+#include <CesiumAsync/IAssetAccessor.h>
 #include <CesiumGeospatial/Ellipsoid.h>
 #include <CesiumGltf/Ktx2TranscodeTargets.h>
 
@@ -328,6 +329,11 @@ struct CESIUM3DTILESSELECTION_API TilesetOptions {
    * If no ellipsoid is set, Ellipsoid::WGS84 will be used by default.
    */
   CesiumGeospatial::Ellipsoid ellipsoid = CesiumGeospatial::Ellipsoid::WGS84;
+
+  /**
+   * @brief Headers to attach to requests made for this tileset.
+   */
+  std::vector<CesiumAsync::IAssetAccessor::THeader> requestHeaders;
 };
 
 } // namespace Cesium3DTilesSelection

Cesium3DTilesSelection/src/Tileset.cpp

@@ -54,7 +54,7 @@ Tileset::Tileset(
                   _loadedTiles,
                   externals,
                   options.ellipsoid},
-              std::vector<CesiumAsync::IAssetAccessor::THeader>{},
+              std::vector<CesiumAsync::IAssetAccessor::THeader>(options.requestHeaders),
               std::move(pCustomLoader),
               std::move(pRootTile)),
       } {}

Cesium3DTilesSelection/src/TilesetContentManager.cpp

@@ -685,7 +685,7 @@ TilesetContentManager::TilesetContentManager(
     RasterOverlayCollection&& overlayCollection,
     const std::string& url)
     : _externals{externals},
-      _requestHeaders{},
+      _requestHeaders{tilesetOptions.requestHeaders},
       _pLoader{},
       _pRootTile{},
       _userCredit(
@@ -837,7 +837,7 @@ TilesetContentManager::TilesetContentManager(
     const std::string& ionAccessToken,
     const std::string& ionAssetEndpointUrl)
     : _externals{externals},
-      _requestHeaders{},
+      _requestHeaders{tilesetOptions.requestHeaders},
       _pLoader{},
       _pRootTile{},
       _userCredit(