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// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. See the License for the
// specific language governing permissions and limitations
// under the License.
//! Types used to send and receive primitives between a Thrift client and server.
//!
//! # Examples
//!
//! Create and use a `TInputProtocol`.
//!
//! ```no_run
//! use thrift::protocol::{TBinaryInputProtocol, TInputProtocol};
//! use thrift::transport::TTcpChannel;
//!
//! // create the I/O channel
//! let mut channel = TTcpChannel::new();
//! channel.open("127.0.0.1:9090").unwrap();
//!
//! // create the protocol to decode bytes into types
//! let mut protocol = TBinaryInputProtocol::new(channel, true);
//!
//! // read types from the wire
//! let field_identifier = protocol.read_field_begin().unwrap();
//! let field_contents = protocol.read_string().unwrap();
//! let field_end = protocol.read_field_end().unwrap();
//! ```
//!
//! Create and use a `TOutputProtocol`.
//!
//! ```no_run
//! use thrift::protocol::{TBinaryOutputProtocol, TFieldIdentifier, TOutputProtocol, TType};
//! use thrift::transport::TTcpChannel;
//!
//! // create the I/O channel
//! let mut channel = TTcpChannel::new();
//! channel.open("127.0.0.1:9090").unwrap();
//!
//! // create the protocol to encode types into bytes
//! let mut protocol = TBinaryOutputProtocol::new(channel, true);
//!
//! // write types
//! protocol.write_field_begin(&TFieldIdentifier::new("string_thing", TType::String, 1)).unwrap();
//! protocol.write_string("foo").unwrap();
//! protocol.write_field_end().unwrap();
//! ```
use std::convert::{From, TryFrom};
use std::fmt;
use std::fmt::{Display, Formatter};
use crate::transport::{TReadTransport, TWriteTransport};
use crate::{ProtocolError, ProtocolErrorKind};
#[cfg(test)]
macro_rules! assert_eq_written_bytes {
($o_prot:ident, $expected_bytes:ident) => {{
assert_eq!($o_prot.transport.write_bytes(), &$expected_bytes);
}};
}
// FIXME: should take both read and write
#[cfg(test)]
macro_rules! copy_write_buffer_to_read_buffer {
($o_prot:ident) => {{
$o_prot.transport.copy_write_buffer_to_read_buffer();
}};
}
#[cfg(test)]
macro_rules! set_readable_bytes {
($i_prot:ident, $bytes:expr) => {
$i_prot.transport.set_readable_bytes($bytes);
};
}
mod binary;
mod compact;
mod multiplexed;
mod stored;
pub use self::binary::{
TBinaryInputProtocol, TBinaryInputProtocolFactory, TBinaryOutputProtocol,
TBinaryOutputProtocolFactory,
};
pub use self::compact::{
TCompactInputProtocol, TCompactInputProtocolFactory, TCompactOutputProtocol,
TCompactOutputProtocolFactory,
};
pub use self::multiplexed::TMultiplexedOutputProtocol;
pub use self::stored::TStoredInputProtocol;
// Default maximum depth to which `TInputProtocol::skip` will skip a Thrift
// field. A default is necessary because Thrift structs or collections may
// contain nested structs and collections, which could result in indefinite
// recursion.
const MAXIMUM_SKIP_DEPTH: i8 = 64;
/// Converts a stream of bytes into Thrift identifiers, primitives,
/// containers, or structs.
///
/// This trait does not deal with higher-level Thrift concepts like structs or
/// exceptions - only with primitives and message or container boundaries. Once
/// bytes are read they are deserialized and an identifier (for example
/// `TMessageIdentifier`) or a primitive is returned.
///
/// All methods return a `thrift::Result`. If an `Err` is returned the protocol
/// instance and its underlying transport should be terminated.
///
/// # Examples
///
/// Create and use a `TInputProtocol`
///
/// ```no_run
/// use thrift::protocol::{TBinaryInputProtocol, TInputProtocol};
/// use thrift::transport::TTcpChannel;
///
/// let mut channel = TTcpChannel::new();
/// channel.open("127.0.0.1:9090").unwrap();
///
/// let mut protocol = TBinaryInputProtocol::new(channel, true);
///
/// let field_identifier = protocol.read_field_begin().unwrap();
/// let field_contents = protocol.read_string().unwrap();
/// let field_end = protocol.read_field_end().unwrap();
/// ```
pub trait TInputProtocol {
/// Read the beginning of a Thrift message.
fn read_message_begin(&mut self) -> crate::Result<TMessageIdentifier>;
/// Read the end of a Thrift message.
fn read_message_end(&mut self) -> crate::Result<()>;
/// Read the beginning of a Thrift struct.
fn read_struct_begin(&mut self) -> crate::Result<Option<TStructIdentifier>>;
/// Read the end of a Thrift struct.
fn read_struct_end(&mut self) -> crate::Result<()>;
/// Read the beginning of a Thrift struct field.
fn read_field_begin(&mut self) -> crate::Result<TFieldIdentifier>;
/// Read the end of a Thrift struct field.
fn read_field_end(&mut self) -> crate::Result<()>;
/// Read a bool.
fn read_bool(&mut self) -> crate::Result<bool>;
/// Read a fixed-length byte array.
fn read_bytes(&mut self) -> crate::Result<Vec<u8>>;
/// Read a word.
fn read_i8(&mut self) -> crate::Result<i8>;
/// Read a 16-bit signed integer.
fn read_i16(&mut self) -> crate::Result<i16>;
/// Read a 32-bit signed integer.
fn read_i32(&mut self) -> crate::Result<i32>;
/// Read a 64-bit signed integer.
fn read_i64(&mut self) -> crate::Result<i64>;
/// Read a 64-bit float.
fn read_double(&mut self) -> crate::Result<f64>;
/// Read a fixed-length string (not null terminated).
fn read_string(&mut self) -> crate::Result<String>;
/// Read the beginning of a list.
fn read_list_begin(&mut self) -> crate::Result<TListIdentifier>;
/// Read the end of a list.
fn read_list_end(&mut self) -> crate::Result<()>;
/// Read the beginning of a set.
fn read_set_begin(&mut self) -> crate::Result<TSetIdentifier>;
/// Read the end of a set.
fn read_set_end(&mut self) -> crate::Result<()>;
/// Read the beginning of a map.
fn read_map_begin(&mut self) -> crate::Result<TMapIdentifier>;
/// Read the end of a map.
fn read_map_end(&mut self) -> crate::Result<()>;
/// Skip a field with type `field_type` recursively until the default
/// maximum skip depth is reached.
fn skip(&mut self, field_type: TType) -> crate::Result<()> {
self.skip_till_depth(field_type, MAXIMUM_SKIP_DEPTH)
}
/// Skip a field with type `field_type` recursively up to `depth` levels.
fn skip_till_depth(&mut self, field_type: TType, depth: i8) -> crate::Result<()> {
if depth == 0 {
return Err(crate::Error::Protocol(ProtocolError {
kind: ProtocolErrorKind::DepthLimit,
message: format!("cannot parse past {:?}", field_type),
}));
}
match field_type {
TType::Bool => self.read_bool().map(|_| ()),
TType::I08 => self.read_i8().map(|_| ()),
TType::I16 => self.read_i16().map(|_| ()),
TType::I32 => self.read_i32().map(|_| ()),
TType::I64 => self.read_i64().map(|_| ()),
TType::Double => self.read_double().map(|_| ()),
TType::String => self.read_string().map(|_| ()),
TType::Struct => {
self.read_struct_begin()?;
loop {
let field_ident = self.read_field_begin()?;
if field_ident.field_type == TType::Stop {
break;
}
self.skip_till_depth(field_ident.field_type, depth - 1)?;
}
self.read_struct_end()
}
TType::List => {
let list_ident = self.read_list_begin()?;
for _ in 0..list_ident.size {
self.skip_till_depth(list_ident.element_type, depth - 1)?;
}
self.read_list_end()
}
TType::Set => {
let set_ident = self.read_set_begin()?;
for _ in 0..set_ident.size {
self.skip_till_depth(set_ident.element_type, depth - 1)?;
}
self.read_set_end()
}
TType::Map => {
let map_ident = self.read_map_begin()?;
for _ in 0..map_ident.size {
let key_type = map_ident
.key_type
.expect("non-zero sized map should contain key type");
let val_type = map_ident
.value_type
.expect("non-zero sized map should contain value type");
self.skip_till_depth(key_type, depth - 1)?;
self.skip_till_depth(val_type, depth - 1)?;
}
self.read_map_end()
}
u => Err(crate::Error::Protocol(ProtocolError {
kind: ProtocolErrorKind::Unknown,
message: format!("cannot skip field type {:?}", &u),
})),
}
}
// utility (DO NOT USE IN GENERATED CODE!!!!)
//
/// Read an unsigned byte.
///
/// This method should **never** be used in generated code.
fn read_byte(&mut self) -> crate::Result<u8>;
}
/// Converts Thrift identifiers, primitives, containers or structs into a
/// stream of bytes.
///
/// This trait does not deal with higher-level Thrift concepts like structs or
/// exceptions - only with primitives and message or container boundaries.
/// Write methods take an identifier (for example, `TMessageIdentifier`) or a
/// primitive. Any or all of the fields in an identifier may be omitted when
/// writing to the transport. Write methods may even be noops. All of this is
/// transparent to the caller; as long as a matching `TInputProtocol`
/// implementation is used, received messages will be decoded correctly.
///
/// All methods return a `thrift::Result`. If an `Err` is returned the protocol
/// instance and its underlying transport should be terminated.
///
/// # Examples
///
/// Create and use a `TOutputProtocol`
///
/// ```no_run
/// use thrift::protocol::{TBinaryOutputProtocol, TFieldIdentifier, TOutputProtocol, TType};
/// use thrift::transport::TTcpChannel;
///
/// let mut channel = TTcpChannel::new();
/// channel.open("127.0.0.1:9090").unwrap();
///
/// let mut protocol = TBinaryOutputProtocol::new(channel, true);
///
/// protocol.write_field_begin(&TFieldIdentifier::new("string_thing", TType::String, 1)).unwrap();
/// protocol.write_string("foo").unwrap();
/// protocol.write_field_end().unwrap();
/// ```
pub trait TOutputProtocol {
/// Write the beginning of a Thrift message.
fn write_message_begin(&mut self, identifier: &TMessageIdentifier) -> crate::Result<()>;
/// Write the end of a Thrift message.
fn write_message_end(&mut self) -> crate::Result<()>;
/// Write the beginning of a Thrift struct.
fn write_struct_begin(&mut self, identifier: &TStructIdentifier) -> crate::Result<()>;
/// Write the end of a Thrift struct.
fn write_struct_end(&mut self) -> crate::Result<()>;
/// Write the beginning of a Thrift field.
fn write_field_begin(&mut self, identifier: &TFieldIdentifier) -> crate::Result<()>;
/// Write the end of a Thrift field.
fn write_field_end(&mut self) -> crate::Result<()>;
/// Write a STOP field indicating that all the fields in a struct have been
/// written.
fn write_field_stop(&mut self) -> crate::Result<()>;
/// Write a bool.
fn write_bool(&mut self, b: bool) -> crate::Result<()>;
/// Write a fixed-length byte array.
fn write_bytes(&mut self, b: &[u8]) -> crate::Result<()>;
/// Write an 8-bit signed integer.
fn write_i8(&mut self, i: i8) -> crate::Result<()>;
/// Write a 16-bit signed integer.
fn write_i16(&mut self, i: i16) -> crate::Result<()>;
/// Write a 32-bit signed integer.
fn write_i32(&mut self, i: i32) -> crate::Result<()>;
/// Write a 64-bit signed integer.
fn write_i64(&mut self, i: i64) -> crate::Result<()>;
/// Write a 64-bit float.
fn write_double(&mut self, d: f64) -> crate::Result<()>;
/// Write a fixed-length string.
fn write_string(&mut self, s: &str) -> crate::Result<()>;
/// Write the beginning of a list.
fn write_list_begin(&mut self, identifier: &TListIdentifier) -> crate::Result<()>;
/// Write the end of a list.
fn write_list_end(&mut self) -> crate::Result<()>;
/// Write the beginning of a set.
fn write_set_begin(&mut self, identifier: &TSetIdentifier) -> crate::Result<()>;
/// Write the end of a set.
fn write_set_end(&mut self) -> crate::Result<()>;
/// Write the beginning of a map.
fn write_map_begin(&mut self, identifier: &TMapIdentifier) -> crate::Result<()>;
/// Write the end of a map.
fn write_map_end(&mut self) -> crate::Result<()>;
/// Flush buffered bytes to the underlying transport.
fn flush(&mut self) -> crate::Result<()>;
// utility (DO NOT USE IN GENERATED CODE!!!!)
//
/// Write an unsigned byte.
///
/// This method should **never** be used in generated code.
fn write_byte(&mut self, b: u8) -> crate::Result<()>; // FIXME: REMOVE
}
impl<P> TInputProtocol for Box<P>
where
P: TInputProtocol + ?Sized,
{
fn read_message_begin(&mut self) -> crate::Result<TMessageIdentifier> {
(**self).read_message_begin()
}
fn read_message_end(&mut self) -> crate::Result<()> {
(**self).read_message_end()
}
fn read_struct_begin(&mut self) -> crate::Result<Option<TStructIdentifier>> {
(**self).read_struct_begin()
}
fn read_struct_end(&mut self) -> crate::Result<()> {
(**self).read_struct_end()
}
fn read_field_begin(&mut self) -> crate::Result<TFieldIdentifier> {
(**self).read_field_begin()
}
fn read_field_end(&mut self) -> crate::Result<()> {
(**self).read_field_end()
}
fn read_bool(&mut self) -> crate::Result<bool> {
(**self).read_bool()
}
fn read_bytes(&mut self) -> crate::Result<Vec<u8>> {
(**self).read_bytes()
}
fn read_i8(&mut self) -> crate::Result<i8> {
(**self).read_i8()
}
fn read_i16(&mut self) -> crate::Result<i16> {
(**self).read_i16()
}
fn read_i32(&mut self) -> crate::Result<i32> {
(**self).read_i32()
}
fn read_i64(&mut self) -> crate::Result<i64> {
(**self).read_i64()
}
fn read_double(&mut self) -> crate::Result<f64> {
(**self).read_double()
}
fn read_string(&mut self) -> crate::Result<String> {
(**self).read_string()
}
fn read_list_begin(&mut self) -> crate::Result<TListIdentifier> {
(**self).read_list_begin()
}
fn read_list_end(&mut self) -> crate::Result<()> {
(**self).read_list_end()
}
fn read_set_begin(&mut self) -> crate::Result<TSetIdentifier> {
(**self).read_set_begin()
}
fn read_set_end(&mut self) -> crate::Result<()> {
(**self).read_set_end()
}
fn read_map_begin(&mut self) -> crate::Result<TMapIdentifier> {
(**self).read_map_begin()
}
fn read_map_end(&mut self) -> crate::Result<()> {
(**self).read_map_end()
}
fn read_byte(&mut self) -> crate::Result<u8> {
(**self).read_byte()
}
}
impl<P> TOutputProtocol for Box<P>
where
P: TOutputProtocol + ?Sized,
{
fn write_message_begin(&mut self, identifier: &TMessageIdentifier) -> crate::Result<()> {
(**self).write_message_begin(identifier)
}
fn write_message_end(&mut self) -> crate::Result<()> {
(**self).write_message_end()
}
fn write_struct_begin(&mut self, identifier: &TStructIdentifier) -> crate::Result<()> {
(**self).write_struct_begin(identifier)
}
fn write_struct_end(&mut self) -> crate::Result<()> {
(**self).write_struct_end()
}
fn write_field_begin(&mut self, identifier: &TFieldIdentifier) -> crate::Result<()> {
(**self).write_field_begin(identifier)
}
fn write_field_end(&mut self) -> crate::Result<()> {
(**self).write_field_end()
}
fn write_field_stop(&mut self) -> crate::Result<()> {
(**self).write_field_stop()
}
fn write_bool(&mut self, b: bool) -> crate::Result<()> {
(**self).write_bool(b)
}
fn write_bytes(&mut self, b: &[u8]) -> crate::Result<()> {
(**self).write_bytes(b)
}
fn write_i8(&mut self, i: i8) -> crate::Result<()> {
(**self).write_i8(i)
}
fn write_i16(&mut self, i: i16) -> crate::Result<()> {
(**self).write_i16(i)
}
fn write_i32(&mut self, i: i32) -> crate::Result<()> {
(**self).write_i32(i)
}
fn write_i64(&mut self, i: i64) -> crate::Result<()> {
(**self).write_i64(i)
}
fn write_double(&mut self, d: f64) -> crate::Result<()> {
(**self).write_double(d)
}
fn write_string(&mut self, s: &str) -> crate::Result<()> {
(**self).write_string(s)
}
fn write_list_begin(&mut self, identifier: &TListIdentifier) -> crate::Result<()> {
(**self).write_list_begin(identifier)
}
fn write_list_end(&mut self) -> crate::Result<()> {
(**self).write_list_end()
}
fn write_set_begin(&mut self, identifier: &TSetIdentifier) -> crate::Result<()> {
(**self).write_set_begin(identifier)
}
fn write_set_end(&mut self) -> crate::Result<()> {
(**self).write_set_end()
}
fn write_map_begin(&mut self, identifier: &TMapIdentifier) -> crate::Result<()> {
(**self).write_map_begin(identifier)
}
fn write_map_end(&mut self) -> crate::Result<()> {
(**self).write_map_end()
}
fn flush(&mut self) -> crate::Result<()> {
(**self).flush()
}
fn write_byte(&mut self, b: u8) -> crate::Result<()> {
(**self).write_byte(b)
}
}
/// Helper type used by servers to create `TInputProtocol` instances for
/// accepted client connections.
///
/// # Examples
///
/// Create a `TInputProtocolFactory` and use it to create a `TInputProtocol`.
///
/// ```no_run
/// use thrift::protocol::{TBinaryInputProtocolFactory, TInputProtocolFactory};
/// use thrift::transport::TTcpChannel;
///
/// let mut channel = TTcpChannel::new();
/// channel.open("127.0.0.1:9090").unwrap();
///
/// let factory = TBinaryInputProtocolFactory::new();
/// let protocol = factory.create(Box::new(channel));
/// ```
pub trait TInputProtocolFactory {
// Create a `TInputProtocol` that reads bytes from `transport`.
fn create(&self, transport: Box<dyn TReadTransport + Send>) -> Box<dyn TInputProtocol + Send>;
}
impl<T> TInputProtocolFactory for Box<T>
where
T: TInputProtocolFactory + ?Sized,
{
fn create(&self, transport: Box<dyn TReadTransport + Send>) -> Box<dyn TInputProtocol + Send> {
(**self).create(transport)
}
}
/// Helper type used by servers to create `TOutputProtocol` instances for
/// accepted client connections.
///
/// # Examples
///
/// Create a `TOutputProtocolFactory` and use it to create a `TOutputProtocol`.
///
/// ```no_run
/// use thrift::protocol::{TBinaryOutputProtocolFactory, TOutputProtocolFactory};
/// use thrift::transport::TTcpChannel;
///
/// let mut channel = TTcpChannel::new();
/// channel.open("127.0.0.1:9090").unwrap();
///
/// let factory = TBinaryOutputProtocolFactory::new();
/// let protocol = factory.create(Box::new(channel));
/// ```
pub trait TOutputProtocolFactory {
/// Create a `TOutputProtocol` that writes bytes to `transport`.
fn create(&self, transport: Box<dyn TWriteTransport + Send>)
-> Box<dyn TOutputProtocol + Send>;
}
impl<T> TOutputProtocolFactory for Box<T>
where
T: TOutputProtocolFactory + ?Sized,
{
fn create(
&self,
transport: Box<dyn TWriteTransport + Send>,
) -> Box<dyn TOutputProtocol + Send> {
(**self).create(transport)
}
}
/// Thrift message identifier.
#[derive(Clone, Debug, Eq, PartialEq)]
pub struct TMessageIdentifier {
/// Service call the message is associated with.
pub name: String,
/// Message type.
pub message_type: TMessageType,
/// Ordered sequence number identifying the message.
pub sequence_number: i32,
}
impl TMessageIdentifier {
/// Create a `TMessageIdentifier` for a Thrift service-call named `name`
/// with message type `message_type` and sequence number `sequence_number`.
pub fn new<S: Into<String>>(
name: S,
message_type: TMessageType,
sequence_number: i32,
) -> TMessageIdentifier {
TMessageIdentifier {
name: name.into(),
message_type,
sequence_number,
}
}
}
/// Thrift struct identifier.
#[derive(Clone, Debug, Eq, PartialEq)]
pub struct TStructIdentifier {
/// Name of the encoded Thrift struct.
pub name: String,
}
impl TStructIdentifier {
/// Create a `TStructIdentifier` for a struct named `name`.
pub fn new<S: Into<String>>(name: S) -> TStructIdentifier {
TStructIdentifier { name: name.into() }
}
}
/// Thrift field identifier.
#[derive(Clone, Debug, Eq, PartialEq)]
pub struct TFieldIdentifier {
/// Name of the Thrift field.
///
/// `None` if it's not sent over the wire.
pub name: Option<String>,
/// Field type.
///
/// This may be a primitive, container, or a struct.
pub field_type: TType,
/// Thrift field id.
///
/// `None` only if `field_type` is `TType::Stop`.
pub id: Option<i16>,
}
impl TFieldIdentifier {
/// Create a `TFieldIdentifier` for a field named `name` with type
/// `field_type` and field id `id`.
///
/// `id` should be `None` if `field_type` is `TType::Stop`.
pub fn new<N, S, I>(name: N, field_type: TType, id: I) -> TFieldIdentifier
where
N: Into<Option<S>>,
S: Into<String>,
I: Into<Option<i16>>,
{
TFieldIdentifier {
name: name.into().map(|n| n.into()),
field_type,
id: id.into(),
}
}
}
/// Thrift list identifier.
#[derive(Clone, Debug, Eq, PartialEq)]
pub struct TListIdentifier {
/// Type of the elements in the list.
pub element_type: TType,
/// Number of elements in the list.
pub size: i32,
}
impl TListIdentifier {
/// Create a `TListIdentifier` for a list with `size` elements of type
/// `element_type`.
pub fn new(element_type: TType, size: i32) -> TListIdentifier {
TListIdentifier { element_type, size }
}
}
/// Thrift set identifier.
#[derive(Clone, Debug, Eq, PartialEq)]
pub struct TSetIdentifier {
/// Type of the elements in the set.
pub element_type: TType,
/// Number of elements in the set.
pub size: i32,
}
impl TSetIdentifier {
/// Create a `TSetIdentifier` for a set with `size` elements of type
/// `element_type`.
pub fn new(element_type: TType, size: i32) -> TSetIdentifier {
TSetIdentifier { element_type, size }
}
}
/// Thrift map identifier.
#[derive(Clone, Debug, Eq, PartialEq)]
pub struct TMapIdentifier {
/// Map key type.
pub key_type: Option<TType>,
/// Map value type.
pub value_type: Option<TType>,
/// Number of entries in the map.
pub size: i32,
}
impl TMapIdentifier {
/// Create a `TMapIdentifier` for a map with `size` entries of type
/// `key_type -> value_type`.
pub fn new<K, V>(key_type: K, value_type: V, size: i32) -> TMapIdentifier
where
K: Into<Option<TType>>,
V: Into<Option<TType>>,
{
TMapIdentifier {
key_type: key_type.into(),
value_type: value_type.into(),
size,
}
}
}
/// Thrift message types.
#[derive(Clone, Copy, Debug, Eq, PartialEq)]
pub enum TMessageType {
/// Service-call request.
Call,
/// Service-call response.
Reply,
/// Unexpected error in the remote service.
Exception,
/// One-way service-call request (no response is expected).
OneWay,
}
impl Display for TMessageType {
fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
match *self {
TMessageType::Call => write!(f, "Call"),
TMessageType::Reply => write!(f, "Reply"),
TMessageType::Exception => write!(f, "Exception"),
TMessageType::OneWay => write!(f, "OneWay"),
}
}
}
impl From<TMessageType> for u8 {
fn from(message_type: TMessageType) -> Self {
match message_type {
TMessageType::Call => 0x01,
TMessageType::Reply => 0x02,
TMessageType::Exception => 0x03,
TMessageType::OneWay => 0x04,
}
}
}
impl TryFrom<u8> for TMessageType {
type Error = crate::Error;
fn try_from(b: u8) -> Result<Self, Self::Error> {
match b {
0x01 => Ok(TMessageType::Call),
0x02 => Ok(TMessageType::Reply),
0x03 => Ok(TMessageType::Exception),
0x04 => Ok(TMessageType::OneWay),
unkn => Err(crate::Error::Protocol(ProtocolError {
kind: ProtocolErrorKind::InvalidData,
message: format!("cannot convert {} to TMessageType", unkn),
})),
}
}
}
/// Thrift struct-field types.
#[derive(Clone, Copy, Debug, Eq, PartialEq)]
pub enum TType {
/// Indicates that there are no more serialized fields in this Thrift struct.
Stop,
/// Void (`()`) field.
Void,
/// Boolean.
Bool,
/// Signed 8-bit int.
I08,
/// Double-precision number.
Double,
/// Signed 16-bit int.
I16,
/// Signed 32-bit int.
I32,
/// Signed 64-bit int.
I64,
/// UTF-8 string.
String,
/// UTF-7 string. *Unsupported*.
Utf7,
/// Thrift struct.
Struct,
/// Map.
Map,
/// Set.
Set,
/// List.
List,
/// UTF-8 string.
Utf8,
/// UTF-16 string. *Unsupported*.
Utf16,
}
impl Display for TType {
fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
match *self {
TType::Stop => write!(f, "STOP"),
TType::Void => write!(f, "void"),
TType::Bool => write!(f, "bool"),
TType::I08 => write!(f, "i08"),
TType::Double => write!(f, "double"),
TType::I16 => write!(f, "i16"),
TType::I32 => write!(f, "i32"),
TType::I64 => write!(f, "i64"),
TType::String => write!(f, "string"),
TType::Utf7 => write!(f, "UTF7"),
TType::Struct => write!(f, "struct"),
TType::Map => write!(f, "map"),
TType::Set => write!(f, "set"),
TType::List => write!(f, "list"),
TType::Utf8 => write!(f, "UTF8"),
TType::Utf16 => write!(f, "UTF16"),
}
}
}
/// Compare the expected message sequence number `expected` with the received
/// message sequence number `actual`.
///
/// Return `()` if `actual == expected`, `Err` otherwise.
pub fn verify_expected_sequence_number(expected: i32, actual: i32) -> crate::Result<()> {
if expected == actual {
Ok(())
} else {
Err(crate::Error::Application(crate::ApplicationError {
kind: crate::ApplicationErrorKind::BadSequenceId,
message: format!("expected {} got {}", expected, actual),
}))
}
}
/// Compare the expected service-call name `expected` with the received
/// service-call name `actual`.
///
/// Return `()` if `actual == expected`, `Err` otherwise.
pub fn verify_expected_service_call(expected: &str, actual: &str) -> crate::Result<()> {
if expected == actual {
Ok(())
} else {
Err(crate::Error::Application(crate::ApplicationError {
kind: crate::ApplicationErrorKind::WrongMethodName,
message: format!("expected {} got {}", expected, actual),
}))
}
}
/// Compare the expected message type `expected` with the received message type
/// `actual`.
///
/// Return `()` if `actual == expected`, `Err` otherwise.
pub fn verify_expected_message_type(
expected: TMessageType,
actual: TMessageType,
) -> crate::Result<()> {
if expected == actual {
Ok(())
} else {
Err(crate::Error::Application(crate::ApplicationError {
kind: crate::ApplicationErrorKind::InvalidMessageType,
message: format!("expected {} got {}", expected, actual),
}))
}
}
/// Check if a required Thrift struct field exists.
///
/// Return `()` if it does, `Err` otherwise.
pub fn verify_required_field_exists<T>(field_name: &str, field: &Option<T>) -> crate::Result<()> {
match *field {
Some(_) => Ok(()),
None => Err(crate::Error::Protocol(crate::ProtocolError {
kind: crate::ProtocolErrorKind::Unknown,
message: format!("missing required field {}", field_name),
})),
}
}
/// Extract the field id from a Thrift field identifier.
///
/// `field_ident` must *not* have `TFieldIdentifier.field_type` of type `TType::Stop`.
///
/// Return `TFieldIdentifier.id` if an id exists, `Err` otherwise.
pub fn field_id(field_ident: &TFieldIdentifier) -> crate::Result<i16> {
field_ident.id.ok_or_else(|| {
crate::Error::Protocol(crate::ProtocolError {
kind: crate::ProtocolErrorKind::Unknown,
message: format!("missing field in in {:?}", field_ident),
})
})
}
#[cfg(test)]
mod tests {
use std::io::Cursor;
use super::*;
use crate::transport::{TReadTransport, TWriteTransport};
#[test]
fn must_create_usable_input_protocol_from_concrete_input_protocol() {
let r: Box<dyn TReadTransport> = Box::new(Cursor::new([0, 1, 2]));
let mut t = TCompactInputProtocol::new(r);
takes_input_protocol(&mut t)
}
#[test]
fn must_create_usable_input_protocol_from_boxed_input() {
let r: Box<dyn TReadTransport> = Box::new(Cursor::new([0, 1, 2]));
let mut t: Box<dyn TInputProtocol> = Box::new(TCompactInputProtocol::new(r));
takes_input_protocol(&mut t)
}
#[test]
fn must_create_usable_output_protocol_from_concrete_output_protocol() {
let w: Box<dyn TWriteTransport> = Box::new(vec![0u8; 10]);
let mut t = TCompactOutputProtocol::new(w);
takes_output_protocol(&mut t)
}
#[test]
fn must_create_usable_output_protocol_from_boxed_output() {
let w: Box<dyn TWriteTransport> = Box::new(vec![0u8; 10]);
let mut t: Box<dyn TOutputProtocol> = Box::new(TCompactOutputProtocol::new(w));
takes_output_protocol(&mut t)
}
fn takes_input_protocol<R>(t: &mut R)
where
R: TInputProtocol,
{
t.read_byte().unwrap();
}
fn takes_output_protocol<W>(t: &mut W)
where
W: TOutputProtocol,
{
t.flush().unwrap();
}
}