Working with HTTPS

cmake/FetchDependencies.cmake

@@ -56,3 +56,30 @@ check_and_download("https://github.com/ThePhD/sol2/archive/refs/tags/v3.3.0.zip"
 
 # 11) SDL2_mixer
 check_and_download("https://github.com/libsdl-org/SDL_mixer/archive/refs/tags/release-2.8.0.zip" "SDL_mixer-release-2.8.0.zip" "SDL_mixer-release-2.8.0" "CMakeLists.txt")
+
+# 12) OpenSSL (TLS for wss://) and a native Windows Perl needed to build it
+if(WIN32)
+    check_and_download("https://github.com/openssl/openssl/releases/download/openssl-3.4.1/openssl-3.4.1.tar.gz" "openssl-3.4.1.tar.gz" "openssl-3.4.1" "Configure")
+
+    # Strawberry Perl portable. The zip has no top-level folder, so it is
+    # extracted into its own directory. (Git's MSYS perl cannot build OpenSSL.)
+    set(STRAWBERRY_PERL_DIR "${THIRDPARTY_DIR}/strawberry-perl")
+    set(STRAWBERRY_PERL_ARCHIVE "${THIRDPARTY_DIR}/strawberry-perl-5.42.3.1-64bit-portable.zip")
+    if(NOT EXISTS "${STRAWBERRY_PERL_DIR}/perl/bin/perl.exe")
+        if(NOT EXISTS "${STRAWBERRY_PERL_ARCHIVE}")
+            message(STATUS "Downloading Strawberry Perl...")
+            file(DOWNLOAD
+                "https://github.com/StrawberryPerl/Perl-Dist-Strawberry/releases/download/SP_54231_64bit/strawberry-perl-5.42.3.1-64bit-portable.zip"
+                "${STRAWBERRY_PERL_ARCHIVE}" SHOW_PROGRESS)
+        endif()
+        message(STATUS "Extracting Strawberry Perl...")
+        file(MAKE_DIRECTORY "${STRAWBERRY_PERL_DIR}")
+        execute_process(
+            COMMAND ${CMAKE_COMMAND} -E tar xf "${STRAWBERRY_PERL_ARCHIVE}"
+            WORKING_DIRECTORY "${STRAWBERRY_PERL_DIR}"
+        )
+        if(NOT EXISTS "${STRAWBERRY_PERL_DIR}/perl/bin/perl.exe")
+            message(FATAL_ERROR "Strawberry Perl extraction failed")
+        endif()
+    endif()
+endif()