Added landing visit log line

Cargo.toml

@@ -16,3 +16,4 @@ multer = "3"
 futures = "0.3"
 tokio = { version = "1", features = ["fs"] }
 uuid = { version = "1", features = ["v4"] }
+tracing = "0.1"

src/public.rs

@@ -6,6 +6,7 @@ use cot::request::extractors::Path;
 use cot::response::{IntoResponse, Redirect, Response};
 use cot::router::{Route, Router};
 use serde::Deserialize;
+use tracing::info;
 
 use cot::db::query;
 
@@ -86,6 +87,33 @@ struct ThankYouTemplate<'a> {
 
 async fn landing_page(request: Request, db: Database) -> cot::Result<Response> {
     let lang = detect_lang(&request);
+
+    let ua = request
+        .headers()
+        .get("user-agent")
+        .and_then(|v| v.to_str().ok())
+        .unwrap_or("-");
+    let referer = request
+        .headers()
+        .get("referer")
+        .and_then(|v| v.to_str().ok())
+        .unwrap_or("-");
+    let ip = request
+        .headers()
+        .get("x-forwarded-for")
+        .and_then(|v| v.to_str().ok())
+        .and_then(|s| s.split(',').next())
+        .map(|s| s.trim())
+        .unwrap_or("-");
+
+    info!(
+        target: "landing",
+        ip = ip,
+        lang = lang.code(),
+        referer = referer,
+        ua = ua,
+        "landing visit"
+    );
     let key = "contact_info".to_string();
     let contact_info = query!(Setting, $key == key)
         .get(&db)