framed_transport.hpp

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#pragma once
 
#include <cstddef>
#include <istream>
#include <ostream>
#include <string>
#include <unordered_map>
 
namespace jsonrpc::transport {
 
class FramedTransportTest;
 
class FramedTransport {
  using HeaderMap = std::unordered_map<std::string, std::string>;
 
 protected:
  static constexpr const char *kHeaderDelimiter = "\r\n\r\n";
 
  static void FrameMessage(std::ostream &output, const std::string &message);
 
  static auto ReadHeadersFromStream(std::istream &input) -> HeaderMap;
  static auto ReadContentLengthFromStream(std::istream &input) -> int;
 
  static auto ReadContent(std::istream &input, std::size_t content_length)
      -> std::string;
 
  static auto ReceiveFramedMessage(std::istream &input) -> std::string;
 
 private:
  static auto ParseContentLength(const std::string &header_value) -> int;
 
  friend class FramedTransportTest;
};
 
}  // namespace jsonrpc::transport