Subsonic API: getCoverArt: serve raw image if size is not provided

2024-12-07 18:27:01 +01:00
parent 350e213529
commit def4d8c3e3
25 changed files with 305 additions and 372 deletions
@@ -0,0 +1,103 @@
+/*
+ * Copyright (C) 2015 Emeric Poupon
+ *
+ * This file is part of LMS.
+ *
+ * LMS is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * LMS is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with LMS.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "EncodedImage.hpp"
+
+#include <filesystem>
+#include <fstream>
+#include <unordered_map>
+
+#include "core/ITraceLogger.hpp"
+#include "core/String.hpp"
+#include "image/Exception.hpp"
+
+namespace lms::image
+{
+    namespace
+    {
+        std::string_view extensionToMimeType(const std::filesystem::path& extension)
+        {
+            static const std::unordered_map<std::string_view, std::string_view> mimeTypesByExtension{
+                { ".bmp", "image/bmp" },
+                { ".gif", "image/gif" },
+                { ".jpeg", "image/jpeg" },
+                { ".jpg", "image/jpeg" },
+                { ".png", "image/png" },
+                { ".ppm", "image/x-portable-pixmap" },
+                { ".svg", "image/svg+xml" },
+            };
+
+            const auto it{ mimeTypesByExtension.find(core::stringUtils::stringToLower(extension.c_str())) };
+            if (it == std::cend(mimeTypesByExtension))
+                throw Exception{ "Unhandled image extension '" + extension.string() + "'" };
+            return it->second;
+        }
+
+        std::vector<std::byte> fileToBuffer(const std::filesystem::path& p)
+        {
+            LMS_SCOPED_TRACE_DETAILED("Image", "ReadFile");
+
+            std::ifstream ifs{ p.string(), std::ios::binary };
+            if (!ifs.is_open())
+                throw Exception{ "Cannot open file '" + p.string() + "' for reading purpose" };
+
+            std::vector<std::byte> data;
+            // read file content
+            ifs.seekg(0, std::ios::end);
+            std::streamsize size = ifs.tellg();
+            if (size < 0)
+                throw Exception{ "Cannot determine file size for '" + p.string() + "'" };
+
+            ifs.seekg(0, std::ios::beg);
+            data.resize(size);
+            if (!ifs.read(reinterpret_cast<char*>(data.data()), size))
+                throw Exception{ "Cannot read file content for '" + p.string() + "'" };
+
+            return data;
+        }
+
+    } // namespace
+
+    std::unique_ptr<IEncodedImage> readImage(const std::filesystem::path& path)
+    {
+        return std::make_unique<EncodedImage>(path);
+    }
+
+    std::unique_ptr<IEncodedImage> readImage(std::span<const std::byte> encodedData, std::string_view mimeType)
+    {
+        return std::make_unique<EncodedImage>(encodedData, mimeType);
+    }
+
+    EncodedImage::EncodedImage(std::vector<std::byte>&& data, std::string_view mimeType)
+        : _data{ std::move(data) }
+        , _mimeType(mimeType)
+    {
+    }
+
+    EncodedImage::EncodedImage(std::span<const std::byte> data, std::string_view mimeType)
+        : _data(std::cbegin(data), std::cend(data))
+        , _mimeType(mimeType)
+    {
+    }
+
+    EncodedImage::EncodedImage(const std::filesystem::path& p)
+        : EncodedImage::EncodedImage{ fileToBuffer(p), extensionToMimeType(p.extension()) }
+    {
+    }
+} // namespace lms::image