diff options
Diffstat (limited to 'http/http_file_body.hpp')
-rw-r--r-- | http/http_file_body.hpp | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/http/http_file_body.hpp b/http/http_file_body.hpp new file mode 100644 index 0000000000..eaafd5dbeb --- /dev/null +++ b/http/http_file_body.hpp @@ -0,0 +1,136 @@ +#pragma once + +#include "utility.hpp" + +#include <boost/beast/core/file_posix.hpp> +#include <boost/beast/http/message.hpp> +#include <boost/system/error_code.hpp> + +namespace bmcweb +{ +struct FileBody +{ + class writer; + class value_type; + + static std::uint64_t size(const value_type& body); +}; + +enum class EncodingType +{ + Raw, + Base64, +}; + +class FileBody::value_type +{ + boost::beast::file_posix fileHandle; + + std::uint64_t fileSize = 0; + + public: + EncodingType encodingType = EncodingType::Raw; + + ~value_type() = default; + value_type() = default; + explicit value_type(EncodingType enc) : encodingType(enc) {} + value_type(value_type&& other) = default; + value_type& operator=(value_type&& other) = default; + value_type(const value_type& other) = delete; + value_type& operator=(const value_type& other) = delete; + + boost::beast::file_posix& file() + { + return fileHandle; + } + + std::uint64_t size() const + { + return fileSize; + } + + void open(const char* path, boost::beast::file_mode mode, + boost::system::error_code& ec) + { + fileHandle.open(path, mode, ec); + fileSize = fileHandle.size(ec); + } + + void setFd(int fd, boost::system::error_code& ec) + { + fileHandle.native_handle(fd); + fileSize = fileHandle.size(ec); + } +}; + +inline std::uint64_t FileBody::size(const value_type& body) +{ + return body.size(); +} + +class FileBody::writer +{ + public: + using const_buffers_type = boost::asio::const_buffer; + + private: + std::string buf; + crow::utility::Base64Encoder encoder; + + value_type& body; + std::uint64_t remain; + constexpr static size_t readBufSize = 4096; + std::array<char, readBufSize> fileReadBuf{}; + + public: + template <bool IsRequest, class Fields> + writer(boost::beast::http::header<IsRequest, Fields>& /*header*/, + value_type& bodyIn) : + body(bodyIn), + remain(body.size()) + {} + + static void init(boost::beast::error_code& ec) + { + ec = {}; + } + + boost::optional<std::pair<const_buffers_type, bool>> + get(boost::beast::error_code& ec) + { + size_t toRead = fileReadBuf.size(); + if (remain < toRead) + { + toRead = static_cast<size_t>(remain); + } + size_t read = body.file().read(fileReadBuf.data(), toRead, ec); + if (read != toRead || ec) + { + return boost::none; + } + remain -= read; + + std::string_view chunkView(fileReadBuf.data(), read); + + std::pair<const_buffers_type, bool> ret; + ret.second = remain > 0; + if (body.encodingType == EncodingType::Base64) + { + buf.clear(); + buf.reserve( + crow::utility::Base64Encoder::encodedSize(chunkView.size())); + encoder.encode(chunkView, buf); + if (!ret.second) + { + encoder.finalize(buf); + } + ret.first = const_buffers_type(buf.data(), buf.size()); + } + else + { + ret.first = const_buffers_type(chunkView.data(), chunkView.size()); + } + return ret; + } +}; +} // namespace bmcweb |