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#![allow(unused)]
use std::borrow::Borrow;
use std::collections::BTreeMap;
use bytes::Bytes;
use log::error;
use uuid::Uuid;
use crate::protocol::{
Encodable, Decodable, MapEncodable, MapDecodable, Encoder, Decoder, EncodeError, DecodeError, Message, HeaderVersion, VersionRange,
types, write_unknown_tagged_fields, compute_unknown_tagged_fields_size, StrBytes, buf::{ByteBuf, ByteBufMut}
};
#[derive(Debug, Clone, PartialEq, derive_builder::Builder)]
pub struct RequestHeader {
pub request_api_key: i16,
pub request_api_version: i16,
pub correlation_id: i32,
pub client_id: Option<StrBytes>,
pub unknown_tagged_fields: BTreeMap<i32, Vec<u8>>,
}
impl Encodable for RequestHeader {
fn encode<B: ByteBufMut>(&self, buf: &mut B, version: i16) -> Result<(), EncodeError> {
types::Int16.encode(buf, &self.request_api_key)?;
types::Int16.encode(buf, &self.request_api_version)?;
types::Int32.encode(buf, &self.correlation_id)?;
if version >= 1 {
types::String.encode(buf, &self.client_id)?;
}
if version >= 2 {
let num_tagged_fields = self.unknown_tagged_fields.len();
if num_tagged_fields > std::u32::MAX as usize {
error!("Too many tagged fields to encode ({} fields)", num_tagged_fields);
return Err(EncodeError);
}
types::UnsignedVarInt.encode(buf, num_tagged_fields as u32)?;
write_unknown_tagged_fields(buf, 0.., &self.unknown_tagged_fields)?;
}
Ok(())
}
fn compute_size(&self, version: i16) -> Result<usize, EncodeError> {
let mut total_size = 0;
total_size += types::Int16.compute_size(&self.request_api_key)?;
total_size += types::Int16.compute_size(&self.request_api_version)?;
total_size += types::Int32.compute_size(&self.correlation_id)?;
if version >= 1 {
total_size += types::String.compute_size(&self.client_id)?;
}
if version >= 2 {
let num_tagged_fields = self.unknown_tagged_fields.len();
if num_tagged_fields > std::u32::MAX as usize {
error!("Too many tagged fields to encode ({} fields)", num_tagged_fields);
return Err(EncodeError);
}
total_size += types::UnsignedVarInt.compute_size(num_tagged_fields as u32)?;
total_size += compute_unknown_tagged_fields_size(&self.unknown_tagged_fields)?;
}
Ok(total_size)
}
}
impl Decodable for RequestHeader {
fn decode<B: ByteBuf>(buf: &mut B, version: i16) -> Result<Self, DecodeError> {
let request_api_key = types::Int16.decode(buf)?;
let request_api_version = types::Int16.decode(buf)?;
let correlation_id = types::Int32.decode(buf)?;
let client_id = if version >= 1 {
types::String.decode(buf)?
} else {
Some(Default::default())
};
let mut unknown_tagged_fields = BTreeMap::new();
if version >= 2 {
let num_tagged_fields = types::UnsignedVarInt.decode(buf)?;
for _ in 0..num_tagged_fields {
let tag: u32 = types::UnsignedVarInt.decode(buf)?;
let size: u32 = types::UnsignedVarInt.decode(buf)?;
let mut unknown_value = vec![0; size as usize];
buf.try_copy_to_slice(&mut unknown_value)?;
unknown_tagged_fields.insert(tag as i32, unknown_value);
}
}
Ok(Self {
request_api_key,
request_api_version,
correlation_id,
client_id,
unknown_tagged_fields,
})
}
}
impl Default for RequestHeader {
fn default() -> Self {
Self {
request_api_key: 0,
request_api_version: 0,
correlation_id: 0,
client_id: Some(Default::default()),
unknown_tagged_fields: BTreeMap::new(),
}
}
}
impl Message for RequestHeader {
const VERSIONS: VersionRange = VersionRange { min: 0, max: 2 };
}