Struct Builder
pub struct Builder { /* private fields */ }
Expand description
Implementation of the builder pattern for PROXY protocol v2 headers.
Supports both valid and invalid headers via the write_payload
and write_payloads
functions.
§Examples
use rama_haproxy::protocol::v2::{Addresses, AddressFamily, Builder, Command, IPv4, Protocol, PROTOCOL_PREFIX, Type, Version};
let mut expected = Vec::from(PROTOCOL_PREFIX);
expected.extend([
0x21, 0x12, 0, 16, 127, 0, 0, 1, 192, 168, 1, 1, 0, 80, 1, 187, 4, 0, 1, 42
]);
let addresses: Addresses = IPv4::new([127, 0, 0, 1], [192, 168, 1, 1], 80, 443).into();
let header = Builder::with_addresses(
Version::Two | Command::Proxy,
Protocol::Datagram,
addresses
)
.write_tlv(Type::NoOp, [42].as_slice())
.unwrap()
.build()
.unwrap();
assert_eq!(header, expected);
Implementations§
§impl Builder
impl Builder
pub const fn new(version_command: u8, address_family_protocol: u8) -> Builder
pub const fn new(version_command: u8, address_family_protocol: u8) -> Builder
Creates an instance of a Builder
with the given header bytes.
No guarantee is made that any address bytes written as a payload will match the header’s address family.
The length is determined on build
unless set_length
is called to set an explicit value.
pub fn with_addresses<T>(
version_command: u8,
protocol: Protocol,
addresses: T,
) -> Builder
pub fn with_addresses<T>( version_command: u8, protocol: Protocol, addresses: T, ) -> Builder
Creates an instance of a Builder
with the given header bytes and Addresses
.
The address family is determined from the variant of the Addresses
given.
The length is determined on build
unless set_length
is called to set an explicit value.
pub fn reserve_capacity(self, capacity: usize) -> Builder
pub fn reserve_capacity(self, capacity: usize) -> Builder
Reserves the requested additional capacity in the underlying buffer.
Helps to prevent resizing the underlying buffer when called before write_payload
, write_payloads
.
When called after write_payload
, write_payloads
, useful as a hint on how to resize the buffer.
pub fn set_reserve_capacity(&mut self, capacity: usize) -> &mut Builder
pub fn set_reserve_capacity(&mut self, capacity: usize) -> &mut Builder
Reserves the requested additional capacity in the underlying buffer.
Helps to prevent resizing the underlying buffer when called before write_payload
, write_payloads
.
When called after write_payload
, write_payloads
, useful as a hint on how to resize the buffer.
pub fn set_length<T>(self, length: T) -> Builder
pub fn set_length<T>(self, length: T) -> Builder
Overrides the length in the header.
When set to Some
value, the length may be smaller or larger than the actual payload in the buffer.
pub fn write_payloads<T, I, II>(self, payloads: II) -> Result<Builder, Error>
pub fn write_payloads<T, I, II>(self, payloads: II) -> Result<Builder, Error>
Writes a iterable set of payloads in order to the buffer.
No bytes are added by this Builder
as a delimiter.
pub fn write_payload<T>(self, payload: T) -> Result<Builder, Error>where
T: WriteToHeader,
pub fn write_payload<T>(self, payload: T) -> Result<Builder, Error>where
T: WriteToHeader,
Writes a single payload to the buffer.
No surrounding bytes (terminal or otherwise) are added by this Builder
.
pub fn write_tlv(
self,
kind: impl Into<u8>,
value: &[u8],
) -> Result<Builder, Error>
pub fn write_tlv( self, kind: impl Into<u8>, value: &[u8], ) -> Result<Builder, Error>
Writes a Type-Length-Value as a payload.
No surrounding bytes (terminal or otherwise) are added by this Builder
.
The length is determined by the length of the slice.
An error is returned when the length of the slice exceeds u16::MAX
.
Trait Implementations§
Auto Trait Implementations§
impl Freeze for Builder
impl RefUnwindSafe for Builder
impl Send for Builder
impl Sync for Builder
impl Unpin for Builder
impl UnwindSafe for Builder
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