Add request id

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "tracing-actix-web"
-version = "0.1.0"
+version = "0.1.1"
 authors = ["Luca Palmieri <rust@lpalmieri.com>"]
 edition = "2018"
 
@@ -20,6 +20,7 @@ actix-web = "2"
 tracing = "0.1.19"
 tracing-futures = "0.2.4"
 futures = "0.3.5"
+uuid = { version = "0.8.1", features = ["v4"] }
 
 [dev-dependencies]
 tracing-subscriber = { version = "0.2.12", features = ["registry", "env-filter"] }

src/lib.rs

@@ -23,6 +23,7 @@ use std::future::Future;
 use std::pin::Pin;
 use tracing::Span;
 use tracing_futures::Instrument;
+use uuid::Uuid;
 
 /// `TracingLogger` is a middleware to log request and response info in a structured format.
 ///
@@ -136,6 +137,7 @@ where
             request_path = %req.path(),
             user_agent = %user_agent,
             client_ip_address = %req.connection_info().remote().unwrap_or(""),
+            request_id = %Uuid::new_v4(),
             status_code = tracing::field::Empty,
         );
         let fut = self.service.call(req);