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use std::io::{self, Cursor}; use fbthrift::{ binary_protocol::BinaryProtocolDeserializer, ApplicationException, Deserialize, MessageType, ProtocolReader, }; use fbthrift_transport_response_handler::ResponseHandler; use nebula_fbthrift_meta::services::meta_service::{ GetSpaceExn, ListEdgesExn, ListPartsExn, ListSpacesExn, ListTagsExn, }; #[derive(Clone)] pub struct MetaTransportResponseHandler; impl ResponseHandler for MetaTransportResponseHandler { fn try_make_static_response_bytes( &mut self, _service_name: &'static str, fn_name: &'static str, _request_bytes: &[u8], ) -> io::Result<Option<Vec<u8>>> { match fn_name { "MetaService.listSpaces" | "MetaService.getSpace" | "MetaService.listParts" | "MetaService.listTags" | "MetaService.listEdges" => Ok(None), _ => Err(io::Error::new( io::ErrorKind::Other, format!("Unknown method {}", fn_name), )), } } fn parse_response_bytes(&mut self, response_bytes: &[u8]) -> io::Result<Option<usize>> { let mut des = BinaryProtocolDeserializer::new(Cursor::new(response_bytes)); let (name, message_type, _) = match des.read_message_begin(|v| v.to_vec()) { Ok(v) => v, Err(_) => return Ok(None), }; match &name[..] { b"listSpaces" | b"getSpace" | b"listParts" | b"listTags" | b"listEdges" => {} _ => return Ok(None), }; match message_type { MessageType::Reply => { match &name[..] { b"listSpaces" => { let _: ListSpacesExn = match Deserialize::read(&mut des) { Ok(v) => v, Err(_) => return Ok(None), }; } b"getSpace" => { let _: GetSpaceExn = match Deserialize::read(&mut des) { Ok(v) => v, Err(_) => return Ok(None), }; } b"listParts" => { let _: ListPartsExn = match Deserialize::read(&mut des) { Ok(v) => v, Err(_) => return Ok(None), }; } b"listTags" => { let _: ListTagsExn = match Deserialize::read(&mut des) { Ok(v) => v, Err(_) => return Ok(None), }; } b"listEdges" => { let _: ListEdgesExn = match Deserialize::read(&mut des) { Ok(v) => v, Err(_) => return Ok(None), }; } _ => unreachable!(), }; } MessageType::Exception => { let _: ApplicationException = match Deserialize::read(&mut des) { Ok(v) => v, Err(_) => return Ok(None), }; } MessageType::Call | MessageType::Oneway | MessageType::InvalidMessageType => {} } match des.read_message_end() { Ok(v) => v, Err(_) => return Ok(None), }; Ok(Some(des.into_inner().position() as usize)) } } #[cfg(test)] mod tests { use super::*; use std::error; #[test] fn test_try_make_static_response_bytes() -> Result<(), Box<dyn error::Error>> { let mut handler = MetaTransportResponseHandler; assert_eq!( handler.try_make_static_response_bytes( "MetaService", "MetaService.listSpaces", b"FOO" )?, None ); assert_eq!( handler.try_make_static_response_bytes( "MetaService", "MetaService.getSpace", b"FOO" )?, None ); assert_eq!( handler.try_make_static_response_bytes( "MetaService", "MetaService.listParts", b"FOO" )?, None ); assert_eq!( handler.try_make_static_response_bytes( "MetaService", "MetaService.listTags", b"FOO" )?, None ); assert_eq!( handler.try_make_static_response_bytes( "MetaService", "MetaService.listEdges", b"FOO" )?, None ); match handler.try_make_static_response_bytes("MetaService", "MetaService.foo", b"FOO") { Ok(_) => assert!(false), Err(err) => { assert_eq!(err.kind(), io::ErrorKind::Other); assert_eq!(err.to_string(), "Unknown method MetaService.foo"); } } Ok(()) } }