next_read_operation t returns a value describing the next operation that the caller should conduct on behalf of the connection.

read t bigstring ~off ~len reads bytes of input from the provided range of bigstring and returns the number of bytes consumed by the connection. read should be called after next_read_operation returns a `Read value and additional input is available for the connection to consume.

read_eof t bigstring ~off ~len reads bytes of input from the provided range of bigstring and returns the number of bytes consumed by the connection. read_eof should be called after next_read_operation returns a `Read and an EOF has been received from the communication channel. The connection will attempt to consume any buffered input and then shutdown the HTTP parser for the connection.

next_write_operation t returns a value describing the next operation that the caller should conduct on behalf of the connection.

report_write_result t result reports the result of the latest write attempt to the connection. report_write_result should be called after a call to next_write_operation that returns a `Write buffer value.

• `Ok n indicates that the caller successfully wrote n bytes of output from the buffer that the caller was provided by next_write_operation.
• `Closed indicates that the output destination will no longer accept bytes from the write processor.

yield_writer t continue registers with the connection to call continue when writing should resume. yield_writer should be called after next_write_operation returns a `Yield value.

report_exn t exn reports that an error exn has been caught and that it has been attributed to t. Calling this function will switch t into an error state. Depending on the state t is transitioning from, it may call its error handler before terminating the connection.