temp_file.hpp

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#pragma once
 
/// @file userver/fs/blocking/temp_file.hpp
/// @brief @copybrief fs::blocking::TempFile
 
#include <string>
#include <string_view>
 
USERVER_NAMESPACE_BEGIN
 
namespace fs::blocking {
 
/// @ingroup userver_universal userver_containers
///
/// @brief A unique temporary file. The file is deleted when the `TempFile`
/// object is destroyed.
/// @note The file has permissions=0600. Any newly created parent directories
/// have permissions=0700.
/// @note The newly created file is immediately opened with read-write
/// permissions. The file descriptor can be accessed using `File`.
class TempFile final {
public:
    /// @brief Create the file at the default path for temporary files
    /// @throws std::runtime_error
    static TempFile Create();
 
    /// @brief Create the file at the specified path
    /// @param parent_path The directory where the temporary file will be created
    /// @param name_prefix File name prefix, a random string will be added
    /// after the prefix
    /// @throws std::runtime_error
    static TempFile Create(std::string_view parent_path, std::string_view name_prefix);
 
    TempFile() = delete;
    TempFile(TempFile&& other) noexcept;
    TempFile& operator=(TempFile&& other) noexcept;
    ~TempFile();
 
    /// Take ownership of an existing file
    static TempFile Adopt(std::string path);
 
    /// The file path
    const std::string& GetPath() const;
 
    /// @brief Remove the file early
    /// @throws std::runtime_error
    void Remove() &&;
 
private:
    explicit TempFile(std::string&& path);
 
    std::string path_;
};
 
}  // namespace fs::blocking
 
USERVER_NAMESPACE_END