• body : httpmessage_message
• length : httpmessage_stringview
• line : httpmessage_headerfield_value
• major_version : httpmessage_message
• message : httpmessage_request , httpmessage_response
• method : httpmessage_request
• minor_version : httpmessage_message
• name : httpmessage_headerfield
• next_field : httpmessage_headerfield
• next_line : httpmessage_headerfield_value
• request_uri : httpmessage_request
• status_code : httpmessage_response
• text : httpmessage_stringview
• type : httpmessage_message
• value : httpmessage_headerfield