66 lines
1.9 KiB
Rust
66 lines
1.9 KiB
Rust
use axum::{
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extract::Request,
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http::{header::HeaderName, HeaderValue, Request as HttpRequest},
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middleware::Next,
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response::Response,
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};
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use uuid::Uuid;
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pub const X_REQUEST_ID_HEADER: &str = "x-request-id";
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// 当前阶段先把请求级元信息统一挂到 extensions，后续响应头、envelope 与错误处理中间件继续复用。
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#[derive(Clone, Debug)]
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pub struct RequestContext {
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request_id: String,
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}
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impl RequestContext {
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pub fn new(request_id: String) -> Self {
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Self { request_id }
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}
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pub fn request_id(&self) -> &str {
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&self.request_id
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}
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}
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pub async fn attach_request_context(mut request: Request, next: Next) -> Response {
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let request_id = request
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.headers()
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.get(X_REQUEST_ID_HEADER)
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.and_then(|value| value.to_str().ok())
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.map(str::trim)
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.filter(|value| !value.is_empty())
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.map(ToOwned::to_owned)
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.unwrap_or_else(|| Uuid::new_v4().to_string());
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request
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.extensions_mut()
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.insert(RequestContext::new(request_id.clone()));
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// 统一把 request_id 写回请求头，方便后续 tracing、响应头与 envelope 层读取同一来源。
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if let Ok(header_value) = HeaderValue::from_str(&request_id) {
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request
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.headers_mut()
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.insert(HeaderName::from_static(X_REQUEST_ID_HEADER), header_value);
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}
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next.run(request).await
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}
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pub fn resolve_request_id<B>(request: &HttpRequest<B>) -> Option<String> {
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request
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.extensions()
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.get::<RequestContext>()
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.map(|context| context.request_id().to_string())
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.or_else(|| {
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request
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.headers()
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.get(X_REQUEST_ID_HEADER)
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.and_then(|value| value.to_str().ok())
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.map(str::trim)
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.filter(|value| !value.is_empty())
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.map(ToOwned::to_owned)
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})
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}
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