rust Serde字节无法序列化/反序列化

我已经决定尝试使用serde进行网络包序列化，但这是一个痛苦的过程。
我根本无法序列化Enum，而且不断收到错误。我在网上也找不到可用的示例，在doc和repo中都没有。
这就是为什么我在寻找：

use serde::{Serialize, Deserialize};

use super::{ClientMessage, ServerMessage};

/// The different messages that can be sent from the client to the lobby.
#[derive(Debug, Serialize, Deserialize)]
pub enum ClientToLobbyMessage {
    Quit,
    CreateRoom,
    JoinRoom(RoomId),
}

impl ClientMessage for ClientToLobbyMessage {
    fn from_bytes(bytes: &[u8]) -> Option<ClientToLobbyMessage> {
        serde_bytes::deserialize(bytes).ok()
    }
}

字符串
这会产生编译时错误：不满足特性界限ClientToLobbyMessage: serde_bytes::Deserialize<'_>。
在枚举字段上方添加#[serde(with = "serde_bytes")]也不起作用：

use serde::{Serialize, Deserialize};

use super::{ClientMessage, ServerMessage};

/// The different messages that can be sent from the client to the lobby.
#[derive(Debug, Serialize, Deserialize)]
pub enum ClientToLobbyMessage {
    #[serde(with = "serde_bytes")]
    Quit,
    #[serde(with = "serde_bytes")]
    CreateRoom,
    #[serde(with = "serde_bytes")]
    JoinRoom(RoomId),
}

型
这将在派生宏中产生错误：此函数采用2个参数，但在Serialize上提供了1个参数，并且Deserialize不满足特征边界(): serde_bytes::Deserialize<'_>。
最后，在serde_bytes包中找不到派生宏，如use serde_bytes::{Serialize, Deserialize};所示：此处导入了Serialize，但它只是一个特性，没有派生宏。
Cargo.toml文件如下所示：

[dependencies]
serde = { version = "1.0.178", features = ["derive"] }
serde_bytes = "0.11.12"

型
任何尝试向serde_bytes添加特性（就像我对serde所做的那样）的操作都会导致：无法为serde_bytes选择可解决此冲突错误的版本。
我真的希望我错过了一些明显的东西在这里，但我有点失望，因为我听说serde是超级容易使用。

由于您的示例不完整，因此我将假设您的示例为：

use serde::{Deserialize, Serialize};

trait ClientMessage: Sized {
    fn from_bytes(bytes: &[u8]) -> Option<Self>;
}

/// The different messages that can be sent from the client to the lobby.
#[derive(Debug, Serialize, Deserialize)]
pub enum ClientToLobbyMessage {
    Quit,
    CreateRoom,
    JoinRoom(i32),
}

impl ClientMessage for ClientToLobbyMessage {
    fn from_bytes(bytes: &[u8]) -> Option<ClientToLobbyMessage> {
        serde_bytes::deserialize(bytes).ok()
    }
}

字符串
这就产生了一条可怕的错误消息：

error[E0277]: the trait bound `&[u8]: Deserializer<'_>` is not satisfied
   --> src\lib.rs:17:34
    |
17  |         serde_bytes::deserialize(bytes).ok()
    |         ------------------------ ^^^^^ the trait `Deserializer<'_>` is not implemented for `&[u8]`
    |         |
    |         required by a bound introduced by this call
    |
    = help: the following other types implement trait `Deserializer<'de>`:
              UnitDeserializer<E>
              U32Deserializer<E>
              _::_serde::de::value::StrDeserializer<'a, E>
              _::_serde::de::value::BorrowedStrDeserializer<'de, E>
              StringDeserializer<E>
              CowStrDeserializer<'a, E>
              BytesDeserializer<'a, E>
              BorrowedBytesDeserializer<'de, E>
            and 25 others
note: required by a bound in `serde_bytes::deserialize`
   --> C:\Users\Finomnis\.cargo\registry\src\index.crates.io-6f17d22bba15001f\serde_bytes-0.11.12\src\lib.rs:110:8
    |
107 | pub fn deserialize<'de, T, D>(deserializer: D) -> Result<T, D::Error>
    |        ----------- required by a bound in this function
...
110 |     D: Deserializer<'de>,
    |        ^^^^^^^^^^^^^^^^^ required by this bound in `deserialize`

error[E0277]: the trait bound `&[u8]: Deserializer<'_>` is not satisfied
  --> src\lib.rs:17:9
   |
17 |         serde_bytes::deserialize(bytes).ok()
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Deserializer<'_>` is not implemented for `&[u8]`
   |
   = help: the following other types implement trait `Deserializer<'de>`:
             UnitDeserializer<E>
             U32Deserializer<E>
             _::_serde::de::value::StrDeserializer<'a, E>
             _::_serde::de::value::BorrowedStrDeserializer<'de, E>
             StringDeserializer<E>
             CowStrDeserializer<'a, E>
             BytesDeserializer<'a, E>
             BorrowedBytesDeserializer<'de, E>
           and 25 others

error[E0277]: the trait bound `ClientToLobbyMessage: serde_bytes::Deserialize<'_>` is not satisfied
   --> src\lib.rs:17:9
    |
17  |         serde_bytes::deserialize(bytes).ok()
    |         ^^^^^^^^^^^^^^^^^^^^^^^^ the trait `serde_bytes::Deserialize<'_>` is not implemented for `ClientToLobbyMessage`
    |
    = help: the following other types implement trait `serde_bytes::Deserialize<'de>`:
              Box<serde_bytes::Bytes>
              Box<[u8]>
              serde_bytes::ByteBuf
              Cow<'a, [u8]>
              Cow<'a, serde_bytes::Bytes>
              Vec<u8>
              std::option::Option<T>
              &'a [u8]
              &'a serde_bytes::Bytes
note: required by a bound in `serde_bytes::deserialize`
   --> C:\Users\Finomnis\.cargo\registry\src\index.crates.io-6f17d22bba15001f\serde_bytes-0.11.12\src\lib.rs:109:8
    |
107 | pub fn deserialize<'de, T, D>(deserializer: D) -> Result<T, D::Error>
    |        ----------- required by a bound in this function
108 | where
109 |     T: Deserialize<'de>,
    |        ^^^^^^^^^^^^^^^^ required by this bound in `deserialize`

error[E0277]: the trait bound `&[u8]: Deserializer<'_>` is not satisfied
  --> src\lib.rs:17:9
   |
17 |         serde_bytes::deserialize(bytes).ok()
   |         ^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Deserializer<'_>` is not implemented for `&[u8]`
   |
   = help: the following other types implement trait `Deserializer<'de>`:
             UnitDeserializer<E>
             U32Deserializer<E>
             _::_serde::de::value::StrDeserializer<'a, E>
             _::_serde::de::value::BorrowedStrDeserializer<'de, E>
             StringDeserializer<E>
             CowStrDeserializer<'a, E>
             BytesDeserializer<'a, E>
             BorrowedBytesDeserializer<'de, E>
           and 25 others

型
您的错误在于，您将serde_bytes当作一种数据格式来使用，但实际上它不是。它似乎是serde的一个帮助程序库，用于处理字节数组类型。
正如@kmdreko所建议的，您可以改用bincode。这是一个真正的编码。
就像这样：

use serde::{Deserialize, Serialize};

trait ClientMessage: Sized {
    fn from_bytes(bytes: &[u8]) -> Option<Self>;
}

/// The different messages that can be sent from the client to the lobby.
#[derive(Debug, Serialize, Deserialize)]
pub enum ClientToLobbyMessage {
    Quit,
    CreateRoom,
    JoinRoom(i32),
}

impl ClientMessage for ClientToLobbyMessage {
    fn from_bytes(bytes: &[u8]) -> Option<ClientToLobbyMessage> {
        bincode::deserialize(bytes).ok()
    }
}

型

rust Serde字节无法序列化/反序列化

1条答案

相关问题

热门标签

最新问答