Remove the bot views from the visitors counter

Cargo.toml

@@ -13,4 +13,6 @@ rand = "0.8.5"
 chrono = { version = "0.4.9", features = ["serde"] }
 serde = { version = "1.0", features = ["derive"] }
 comrak = "0.24.1"
-tera = "1.19.1"
+tera = "1.19.1"
+isbot = "0.1.3"
+lazy_static = "1.4.0"

src/controllers.rs

@@ -85,8 +85,8 @@ pub mod posts {
 
         let connection = establish_connection();
         diesel::update(posts.filter(id.eq(post_id)))
-        .set(views.eq(views + 1))
-        .execute(&connection)
-        .unwrap();
+            .set(views.eq(views + 1))
+            .execute(&connection)
+            .unwrap();
     }
 }

src/main.rs

@@ -13,13 +13,39 @@ extern crate diesel;
 use comrak::{markdown_to_html, Options};
 use controllers::posts;
 use dotenv::dotenv;
+use isbot::Bots;
+use lazy_static::lazy_static;
 use rocket::fs::{FileServer, NamedFile};
+use rocket::http::Status;
+use rocket::request::{FromRequest, Outcome, Request};
 use rocket::response::content::RawXml;
-use rocket::Request;
 use rocket_dyn_templates::Template;
 use std::path::Path;
 use std::vec::Vec;
 
+lazy_static! {
+    static ref ISBOT: Bots = Bots::default();
+}
+
+struct Headers {
+    user_agent: String,
+}
+
+#[rocket::async_trait]
+impl<'r> FromRequest<'r> for Headers {
+    type Error = ();
+
+    async fn from_request(request: &'r Request<'_>) -> Outcome<Self, Self::Error> {
+        let token = request.headers().get_one("User-Agent");
+        match token {
+            Some(token) => Outcome::Success(Headers {
+                user_agent: token.to_string(),
+            }),
+            None => Outcome::Error((Status::Unauthorized, ())),
+        }
+    }
+}
+
 #[get("/?<page>")]
 fn index(page: Option<u64>) -> Template {
     let page: u64 = page.unwrap_or(1);
@@ -72,13 +98,15 @@ fn atom_feed() -> RawXml<Template> {
 }
 
 #[get("/post/<title>")]
-fn show_post(title: String) -> Template {
+fn show_post(title: String, headers: Headers) -> Template {
     let title_splited: Vec<&str> = title.split('-').collect();
     let id = title_splited.last().unwrap().parse().unwrap_or(-1);
 
     match posts::get_post(id) {
         Ok(mut post) => {
-            posts::add_visit(id);
+            if !ISBOT.is_bot(&headers.user_agent) {
+                posts::add_visit(id);
+            }
 
             let mut comrak_options = Options::default();
             comrak_options.extension.table = true;