[英]How to deserialize binary gRPC metadata to Rust struct?
這是我的代碼。
#[derive(serde::Serialize, serde::Deserialize)]
#[allow(clippy::derive_partial_eq_without_eq)]
#[derive(Clone, PartialEq, ::prost::Message)]
pub struct Metadata {
/// login token
#[prost(string, tag = "1")]
pub access_key: ::prost::alloc::string::String,
/// pack type
#[prost(string, tag = "2")]
pub mobi_app: ::prost::alloc::string::String,
/// device
#[prost(string, tag = "3")]
pub device: ::prost::alloc::string::String,
/// inner build id
#[prost(int32, tag = "4")]
pub build: i32,
/// channel
#[prost(string, tag = "5")]
pub channel: ::prost::alloc::string::String,
/// device buvid
#[prost(string, tag = "6")]
pub buvid: ::prost::alloc::string::String,
/// app platform
#[prost(string, tag = "7")]
pub platform: ::prost::alloc::string::String,
}
//...
let req_metadata_bin = request
.metadata()
.get_bin("x-auth-metadata-bin")
.unwrap()
.as_ref();
let req_metadata: Metadata = bincode::deserialize(req_metadata_bin).unwrap();
我正在嘗試反序列化來自客戶端的二進制 gRPC 元數據。 有人告訴我通過 bincode 運行結果並將其反序列化為結構,但我不知道具體如何操作並編寫了上面的代碼,顯然它不起作用。
thread 'tokio-runtime-worker' panicked at 'called `Result::unwrap()` on an `Err` value: Io(Custom { kind: UnexpectedEof, error: "" })'
我用谷歌搜索解決方案,但一無所獲。 任何建議或代碼示例都會對我有很大幫助。
二進制數據示例:
x-auth-metadata-bin: CiA4NGIxOTE5NTUxZWM1ZGE5M2M1MzI4MzY5ODc5ZjNjMhIHYW5kcm9pZCD0oLADKgZtYXN0ZXIyJVhVMEQwNTgwQTgwQzgyMjc2RDlERjMzQjREMjA2NjVDNDJFMzM6B2FuZHJvaWQ
我假設以下是您最小的可重現示例:
#[derive(serde::Serialize, serde::Deserialize)]
#[allow(clippy::derive_partial_eq_without_eq)]
#[derive(Clone, PartialEq, ::prost::Message)]
pub struct Metadata {
/// login token
#[prost(string, tag = "1")]
pub access_key: ::prost::alloc::string::String,
/// pack type
#[prost(string, tag = "2")]
pub mobi_app: ::prost::alloc::string::String,
/// device
#[prost(string, tag = "3")]
pub device: ::prost::alloc::string::String,
/// inner build id
#[prost(int32, tag = "4")]
pub build: i32,
/// channel
#[prost(string, tag = "5")]
pub channel: ::prost::alloc::string::String,
/// device buvid
#[prost(string, tag = "6")]
pub buvid: ::prost::alloc::string::String,
/// app platform
#[prost(string, tag = "7")]
pub platform: ::prost::alloc::string::String,
}
fn main() {
let req_metadata_bin = base64::decode("CiA4NGIxOTE5NTUxZWM1ZGE5M2M1MzI4MzY5ODc5ZjNjMhIHYW5kcm9pZCD0oLADKgZtYXN0ZXIyJVhVMEQwNTgwQTgwQzgyMjc2RDlERjMzQjREMjA2NjVDNDJFMzM6B2FuZHJvaWQ=").unwrap();
let req_metadata: Metadata = bincode::deserialize(&req_metadata_bin).unwrap();
println!("{:#?}", req_metadata);
}
thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: Io(Custom { kind: UnexpectedEof, error: "" })', src/main.rs:30:74
bincode
是一種與ProtoBuf
完全不同的格式。 要解碼 protobuf 消息,您必須使用實際的 protobuf 解碼器。
像這樣:
#[derive(serde::Serialize, serde::Deserialize)]
#[allow(clippy::derive_partial_eq_without_eq)]
#[derive(Clone, PartialEq, ::prost::Message)]
pub struct Metadata {
/// login token
#[prost(string, tag = "1")]
pub access_key: ::prost::alloc::string::String,
/// pack type
#[prost(string, tag = "2")]
pub mobi_app: ::prost::alloc::string::String,
/// device
#[prost(string, tag = "3")]
pub device: ::prost::alloc::string::String,
/// inner build id
#[prost(int32, tag = "4")]
pub build: i32,
/// channel
#[prost(string, tag = "5")]
pub channel: ::prost::alloc::string::String,
/// device buvid
#[prost(string, tag = "6")]
pub buvid: ::prost::alloc::string::String,
/// app platform
#[prost(string, tag = "7")]
pub platform: ::prost::alloc::string::String,
}
fn main() {
let req_metadata_bin = base64::decode("CiA4NGIxOTE5NTUxZWM1ZGE5M2M1MzI4MzY5ODc5ZjNjMhIHYW5kcm9pZCD0oLADKgZtYXN0ZXIyJVhVMEQwNTgwQTgwQzgyMjc2RDlERjMzQjREMjA2NjVDNDJFMzM6B2FuZHJvaWQ=").unwrap();
let req_metadata: Metadata = prost::Message::decode(req_metadata_bin.as_slice()).unwrap();
println!("{:#?}", req_metadata);
}
Metadata {
access_key: "84b1919551ec5da93c5328369879f3c2",
mobi_app: "android",
device: "",
build: 7082100,
channel: "master",
buvid: "XU0D0580A80C82276D9DF33B4D20665C42E33",
platform: "android",
}
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