Merge pull request #5564 from IntelOrca/fix/download-park-temp-file

Fix #4959: Compiler warning: tmpnam

src/openrct2/CMakeLists.txt

@@ -226,9 +226,8 @@ if (NOT DISABLE_TTF AND UNIX AND NOT APPLE)
     target_include_directories(${PROJECT} PRIVATE ${FONTCONFIG_INCLUDE_DIRS})
 endif ()
 
-# macOS builds fail on the use of tmpnam otherwise (#4959)
 if(APPLE)
-    set(COMMON_COMPILE_OPTIONS "${COMMON_COMPILE_OPTIONS} -Wno-error=deprecated-declarations -Wno-error=objc-method-access")
+    set(COMMON_COMPILE_OPTIONS "${COMMON_COMPILE_OPTIONS} -Wno-error=objc-method-access")
 endif()
 
 # Compiler flags

src/openrct2/Context.cpp

@@ -24,6 +24,7 @@
 #include "core/File.h"
 #include "core/FileStream.hpp"
 #include "core/Guard.hpp"
+#include "core/MemoryStream.h"
 #include "core/String.hpp"
 #include "FileClassifier.h"
 #include "network/network.h"
@@ -322,14 +323,16 @@ namespace OpenRCT2
                 {
 #ifndef DISABLE_HTTP
                     // Download park and open it using its temporary filename
-                    char tmpPath[MAX_PATH];
-                    if (!http_download_park(gOpenRCT2StartupActionPath, tmpPath))
+                    void * data;
+                    size_t dataSize = http_download_park(gOpenRCT2StartupActionPath, &data);
+                    if (dataSize == 0)
                     {
                         title_load();
                         break;
                     }
 
-                    parkLoaded = OpenParkAutoDetectFormat(tmpPath);
+                    auto ms = MemoryStream(data, dataSize, MEMORY_ACCESS::OWNER);
+                    parkLoaded = OpenParkAutoDetectFormat(&ms);
 #endif
                 }
                 else
@@ -491,10 +494,10 @@ namespace OpenRCT2
             sprite_position_tween_restore();
         }
 
-        bool OpenParkAutoDetectFormat(const utf8 * path)
+        bool OpenParkAutoDetectFormat(IStream * stream)
         {
             ClassifiedFile info;
-            if (TryClassifyFile(path, &info))
+            if (TryClassifyFile(stream, &info))
             {
                 if (info.Type == FILE_TYPE::SAVED_GAME ||
                     info.Type == FILE_TYPE::SCENARIO)
@@ -513,7 +516,7 @@ namespace OpenRCT2
                     {
                         try
                         {
-                            parkImporter->LoadSavedGame(path);
+                            parkImporter->LoadFromStream(stream, false);
                             parkImporter->Import();
                             game_fix_save_vars();
                             sprite_position_tween_reset();
@@ -531,7 +534,7 @@ namespace OpenRCT2
                     {
                         try
                         {
-                            parkImporter->LoadScenario(path);
+                            parkImporter->LoadFromStream(stream, true);
                             parkImporter->Import();
                             game_fix_save_vars();
                             sprite_position_tween_reset();

src/openrct2/FileClassifier.cpp

@@ -71,6 +71,8 @@ bool TryClassifyFile(IStream * stream, ClassifiedFile * result)
 
 static bool TryClassifyAsS6(IStream * stream, ClassifiedFile * result)
 {
+    bool success = false;
+    uint64 originalPosition = stream->GetPosition();
     try
     {
         auto chunkReader = SawyerChunkReader(stream);
@@ -84,12 +86,13 @@ static bool TryClassifyAsS6(IStream * stream, ClassifiedFile * result)
             result->Type = FILE_TYPE::SCENARIO;
         }
         result->Version = s6Header.version;
-        return true;
+        success = true;
     }
     catch (Exception)
     {
     }
-    return false;
+    stream->SetPosition(originalPosition);
+    return success;
 }
 
 static bool TryClassifyAsS4(IStream * stream, ClassifiedFile * result)

src/openrct2/network/http.cpp

@@ -292,7 +292,7 @@ const char *http_get_extension_from_url(const char *url, const char *fallback)
     }
 }
 
-bool http_download_park(const char *url, char tmpPath[L_tmpnam + 10])
+size_t http_download_park(const char * url, void * * outData)
 {
     // Download park to buffer in memory
     HttpRequest2 request;
@@ -307,35 +307,24 @@ bool http_download_park(const char *url, char tmpPath[L_tmpnam + 10])
         if (response != NULL) {
             http_request_dispose(response);
         }
-        return false;
+
+        *outData = NULL;
+        return 0;
     }
 
-    // Generate temporary filename that includes the original extension
-    if (tmpnam(tmpPath) == NULL) {
-        Console::Error::WriteLine("Failed to generate temporary filename for downloaded park '%s'", request.Url.c_str());
-        http_request_dispose(response);
-        return false;
+    size_t dataSize = response->size - 1;
+    void * data = malloc(dataSize);
+    if (data == NULL) {
+        dataSize = 0;
+        Console::Error::WriteLine("Failed to allocate memory for downloaded park.");
+    } else {
+        memcpy(data, response->body, dataSize);
     }
-    size_t remainingBytes = L_tmpnam + 10 - strlen(tmpPath);
-
-    const char *ext = http_get_extension_from_url(request.Url.c_str(), ".sv6");
-    strncat(tmpPath, ext, remainingBytes);
-
-    // Store park in temporary file and load it (discard ending NUL in response body)
-    FILE* tmpFile = fopen(tmpPath, "wb");
-
-    if (tmpFile == NULL) {
-        Console::Error::WriteLine("Failed to write downloaded park '%s' to temporary file", request.Url.c_str());
-        http_request_dispose(response);
-        return false;
-    }
-
-    fwrite(response->body, 1, response->size - 1, tmpFile);
-    fclose(tmpFile);
 
     http_request_dispose(response);
 
-    return true;
+    *outData = data;
+    return dataSize;
 }
 
 #endif

src/openrct2/network/http.h

@@ -60,8 +60,14 @@ void http_request_dispose(http_response_t *response);
 
 const char *http_get_extension_from_url(const char *url, const char *fallback);
 
-// Padding for extension that is appended to temporary file name
-bool http_download_park(const char *url, char tmpPath[L_tmpnam + 10]);
+/**
+ * Download a park via HTTP/S from the given URL into a memory buffer. This is
+ * a blocking operation.
+ * @param url The URL to download the park from.
+ * @param outData The data returned.
+ * @returns The size of the data or 0 if the download failed.
+ */
+size_t http_download_park(const char * url, void * * outData);
 #endif // DISABLE_HTTP
 
 // These callbacks are defined anyway, but are dummy if HTTP is disabled