add cookie session example

cookie-session/Cargo.toml

@@ -0,0 +1,12 @@
+[package]
+name = "cookie-session"
+version = "0.1.0"
+authors = ["Nikolay Kim <fafhrd91@gmail.com>"]
+workspace = "../"
+
+[dependencies]
+actix = "0.5"
+actix-web = "^0.5"
+futures = "0.1"
+time = "0.1"
+env_logger = "0.5"

cookie-session/src/main.rs

@@ -0,0 +1,54 @@
+//! Example of cookie based session
+//! Session data is stored in cookie, it is limited to 4kb
+//!
+//! [Redis session example](https://github.com/actix/examples/tree/master/redis-session)
+//!
+//! [User guide](https://actix.rs/book/actix-web/sec-9-middlewares.html#user-sessions)
+
+extern crate actix;
+extern crate actix_web;
+extern crate env_logger;
+extern crate futures;
+
+use actix_web::middleware::{self, RequestSession};
+use actix_web::{server, App, HttpRequest, Result};
+use std::env;
+
+/// simple index handler with session
+fn index(mut req: HttpRequest) -> Result<&'static str> {
+    println!("{:?}", req);
+
+    // RequestSession trait is used for session access
+    let mut counter = 1;
+    if let Some(count) = req.session().get::<i32>("counter")? {
+        println!("SESSION value: {}", count);
+        counter = count + 1;
+        req.session().set("counter", counter)?;
+    } else {
+        req.session().set("counter", counter)?;
+    }
+
+    Ok("welcome!")
+}
+
+fn main() {
+    env::set_var("RUST_LOG", "actix_web=info");
+    env_logger::init();
+    let sys = actix::System::new("session-example");
+
+    server::new(|| {
+        App::new()
+            // enable logger
+            .middleware(middleware::Logger::default())
+            // cookie session middleware
+            .middleware(middleware::SessionStorage::new(
+                middleware::CookieSessionBackend::signed(&[0; 32]).secure(false)
+            ))
+            .resource("/", |r| r.f(index))
+    }).bind("127.0.0.1:8080")
+        .expect("Can not bind to 127.0.0.1:8080")
+        .start();
+
+    println!("Starting http server: 127.0.0.1:8080");
+    let _ = sys.run();
+}