prepare release

This allows to verify time of login or last visit and therfore limiting
the danger of leaked cookies.

CHANGES.md

@@ -2,6 +2,8 @@
 
 ### Added
 
+* Extend `Responder` trait, allow to override status code and headers.
+
 * Add helper functions for reading response body `test::read_body()`
 
 * Added support for `remainder match` (i.e "/path/{tail}*")

actix-http/CHANGES.md

@@ -1,5 +1,16 @@
 # Changes
 
+## [0.1.4] - 2019-04-24
+
+### Added
+
+* Allow to render h1 request headers in `Camel-Case`
+
+### Fixed
+
+* Read until eof for http/1.0 responses #771
+
+
 ## [0.1.3] - 2019-04-23
 
 ### Fixed

actix-http/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "actix-http"
-version = "0.1.3"
+version = "0.1.4"
 authors = ["Nikolay Kim <fafhrd91@gmail.com>"]
 description = "Actix http primitives"
 readme = "README.md"

actix-http/src/h1/decoder.rs

@@ -300,7 +300,13 @@ impl MessageType for ResponseHead {
             error!("MAX_BUFFER_SIZE unprocessed data reached, closing");
             return Err(ParseError::TooLarge);
         } else {
-            PayloadType::None
+            // for HTTP/1.0 read to eof and close connection
+            if msg.version == Version::HTTP_10 {
+                msg.set_connection_type(ConnectionType::Close);
+                PayloadType::Payload(PayloadDecoder::eof())
+            } else {
+                PayloadType::None
+            }
         };
 
         Ok(Some((msg, decoder)))
@@ -331,7 +337,7 @@ impl HeaderIndex {
     }
 }
 
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, PartialEq)]
 /// Http payload item
 pub enum PayloadItem {
     Chunk(Bytes),
@@ -1191,4 +1197,16 @@ mod tests {
         let msg = pl.decode(&mut buf).unwrap().unwrap();
         assert!(msg.eof());
     }
+
+    #[test]
+    fn test_response_http10_read_until_eof() {
+        let mut buf = BytesMut::from(&"HTTP/1.0 200 Ok\r\n\r\ntest data"[..]);
+
+        let mut reader = MessageDecoder::<ResponseHead>::default();
+        let (_msg, pl) = reader.decode(&mut buf).unwrap().unwrap();
+        let mut pl = pl.unwrap();
+
+        let chunk = pl.decode(&mut buf).unwrap().unwrap();
+        assert_eq!(chunk, PayloadItem::Chunk(Bytes::from_static(b"test data")));
+    }
 }

actix-http/src/h1/encoder.rs

@@ -43,6 +43,10 @@ pub(crate) trait MessageType: Sized {
 
     fn headers(&self) -> &HeaderMap;
 
+    fn camel_case(&self) -> bool {
+        false
+    }
+
     fn chunked(&self) -> bool;
 
     fn encode_status(&mut self, dst: &mut BytesMut) -> io::Result<()>;
@@ -57,6 +61,7 @@ pub(crate) trait MessageType: Sized {
     ) -> io::Result<()> {
         let chunked = self.chunked();
         let mut skip_len = length != BodySize::Stream;
+        let camel_case = self.camel_case();
 
         // Content length
         if let Some(status) = self.status() {
@@ -74,18 +79,30 @@ pub(crate) trait MessageType: Sized {
         match length {
             BodySize::Stream => {
                 if chunked {
-                    dst.put_slice(b"\r\ntransfer-encoding: chunked\r\n")
+                    if camel_case {
+                        dst.put_slice(b"\r\nTransfer-Encoding: chunked\r\n")
+                    } else {
+                        dst.put_slice(b"\r\nTransfer-Encoding: chunked\r\n")
+                    }
                 } else {
                     skip_len = false;
                     dst.put_slice(b"\r\n");
                 }
             }
             BodySize::Empty => {
-                dst.put_slice(b"\r\ncontent-length: 0\r\n");
+                if camel_case {
+                    dst.put_slice(b"\r\nContent-Length: 0\r\n");
+                } else {
+                    dst.put_slice(b"\r\ncontent-length: 0\r\n");
+                }
             }
             BodySize::Sized(len) => helpers::write_content_length(len, dst),
             BodySize::Sized64(len) => {
-                dst.put_slice(b"\r\ncontent-length: ");
+                if camel_case {
+                    dst.put_slice(b"\r\nContent-Length: ");
+                } else {
+                    dst.put_slice(b"\r\ncontent-length: ");
+                }
                 write!(dst.writer(), "{}\r\n", len)?;
             }
             BodySize::None => dst.put_slice(b"\r\n"),
@@ -95,10 +112,18 @@ pub(crate) trait MessageType: Sized {
         match ctype {
             ConnectionType::Upgrade => dst.put_slice(b"connection: upgrade\r\n"),
             ConnectionType::KeepAlive if version < Version::HTTP_11 => {
-                dst.put_slice(b"connection: keep-alive\r\n")
+                if camel_case {
+                    dst.put_slice(b"Connection: keep-alive\r\n")
+                } else {
+                    dst.put_slice(b"connection: keep-alive\r\n")
+                }
             }
             ConnectionType::Close if version >= Version::HTTP_11 => {
-                dst.put_slice(b"connection: close\r\n")
+                if camel_case {
+                    dst.put_slice(b"Connection: close\r\n")
+                } else {
+                    dst.put_slice(b"connection: close\r\n")
+                }
             }
             _ => (),
         }
@@ -133,7 +158,12 @@ pub(crate) trait MessageType: Sized {
                             buf = &mut *(dst.bytes_mut() as *mut _);
                         }
                     }
-                    buf[pos..pos + k.len()].copy_from_slice(k);
+                    // use upper Camel-Case
+                    if camel_case {
+                        write_camel_case(k, &mut buf[pos..pos + k.len()]);
+                    } else {
+                        buf[pos..pos + k.len()].copy_from_slice(k);
+                    }
                     pos += k.len();
                     buf[pos..pos + 2].copy_from_slice(b": ");
                     pos += 2;
@@ -158,7 +188,12 @@ pub(crate) trait MessageType: Sized {
                                 buf = &mut *(dst.bytes_mut() as *mut _);
                             }
                         }
-                        buf[pos..pos + k.len()].copy_from_slice(k);
+                        // use upper Camel-Case
+                        if camel_case {
+                            write_camel_case(k, &mut buf[pos..pos + k.len()]);
+                        } else {
+                            buf[pos..pos + k.len()].copy_from_slice(k);
+                        }
                         pos += k.len();
                         buf[pos..pos + 2].copy_from_slice(b": ");
                         pos += 2;
@@ -221,6 +256,10 @@ impl MessageType for RequestHead {
         self.chunked()
     }
 
+    fn camel_case(&self) -> bool {
+        RequestHead::camel_case_headers(self)
+    }
+
     fn headers(&self) -> &HeaderMap {
         &self.headers
     }
@@ -418,11 +457,41 @@ impl<'a> io::Write for Writer<'a> {
     }
 }
 
+fn write_camel_case(value: &[u8], buffer: &mut [u8]) {
+    let mut index = 0;
+    let key = value;
+    let mut key_iter = key.iter();
+
+    if let Some(c) = key_iter.next() {
+        if *c >= b'a' && *c <= b'z' {
+            buffer[index] = *c ^ b' ';
+            index += 1;
+        }
+    } else {
+        return;
+    }
+
+    while let Some(c) = key_iter.next() {
+        buffer[index] = *c;
+        index += 1;
+        if *c == b'-' {
+            if let Some(c) = key_iter.next() {
+                if *c >= b'a' && *c <= b'z' {
+                    buffer[index] = *c ^ b' ';
+                    index += 1;
+                }
+            }
+        }
+    }
+}
+
 #[cfg(test)]
 mod tests {
-    use super::*;
     use bytes::Bytes;
 
+    use super::*;
+    use crate::http::header::{HeaderValue, CONTENT_TYPE};
+
     #[test]
     fn test_chunked_te() {
         let mut bytes = BytesMut::new();
@@ -436,4 +505,64 @@ mod tests {
             Bytes::from_static(b"4\r\ntest\r\n0\r\n\r\n")
         );
     }
+
+    #[test]
+    fn test_camel_case() {
+        let mut bytes = BytesMut::with_capacity(2048);
+        let mut head = RequestHead::default();
+        head.set_camel_case_headers(true);
+        head.headers.insert(DATE, HeaderValue::from_static("date"));
+        head.headers
+            .insert(CONTENT_TYPE, HeaderValue::from_static("plain/text"));
+
+        let _ = head.encode_headers(
+            &mut bytes,
+            Version::HTTP_11,
+            BodySize::Empty,
+            ConnectionType::Close,
+            &ServiceConfig::default(),
+        );
+        assert_eq!(
+            bytes.take().freeze(),
+            Bytes::from_static(b"\r\nContent-Length: 0\r\nConnection: close\r\nDate: date\r\nContent-Type: plain/text\r\n\r\n")
+        );
+
+        let _ = head.encode_headers(
+            &mut bytes,
+            Version::HTTP_11,
+            BodySize::Stream,
+            ConnectionType::KeepAlive,
+            &ServiceConfig::default(),
+        );
+        assert_eq!(
+            bytes.take().freeze(),
+            Bytes::from_static(b"\r\nTransfer-Encoding: chunked\r\nDate: date\r\nContent-Type: plain/text\r\n\r\n")
+        );
+
+        let _ = head.encode_headers(
+            &mut bytes,
+            Version::HTTP_11,
+            BodySize::Sized64(100),
+            ConnectionType::KeepAlive,
+            &ServiceConfig::default(),
+        );
+        assert_eq!(
+            bytes.take().freeze(),
+            Bytes::from_static(b"\r\nContent-Length: 100\r\nDate: date\r\nContent-Type: plain/text\r\n\r\n")
+        );
+
+        head.headers
+            .append(CONTENT_TYPE, HeaderValue::from_static("xml"));
+        let _ = head.encode_headers(
+            &mut bytes,
+            Version::HTTP_11,
+            BodySize::Stream,
+            ConnectionType::KeepAlive,
+            &ServiceConfig::default(),
+        );
+        assert_eq!(
+            bytes.take().freeze(),
+            Bytes::from_static(b"\r\nTransfer-Encoding: chunked\r\nDate: date\r\nContent-Type: xml\r\nContent-Type: plain/text\r\n\r\n")
+        );
+    }
 }

actix-http/src/message.rs

@@ -27,6 +27,7 @@ bitflags! {
         const UPGRADE     = 0b0000_0100;
         const EXPECT      = 0b0000_1000;
         const NO_CHUNKING = 0b0001_0000;
+        const CAMEL_CASE  = 0b0010_0000;
     }
 }
 
@@ -97,6 +98,23 @@ impl RequestHead {
         &mut self.headers
     }
 
+    /// Is to uppercase headers with Camel-Case.
+    /// Befault is `false`
+    #[inline]
+    pub fn camel_case_headers(&self) -> bool {
+        self.flags.contains(Flags::CAMEL_CASE)
+    }
+
+    /// Set `true` to send headers which are uppercased with Camel-Case.
+    #[inline]
+    pub fn set_camel_case_headers(&mut self, val: bool) {
+        if val {
+            self.flags.insert(Flags::CAMEL_CASE);
+        } else {
+            self.flags.remove(Flags::CAMEL_CASE);
+        }
+    }
+
     #[inline]
     /// Set connection type of the message
     pub fn set_connection_type(&mut self, ctype: ConnectionType) {

actix-http/tests/test_client.rs

@@ -59,9 +59,7 @@ fn test_connection_close() {
             .finish(|_| ok::<_, ()>(Response::Ok().body(STR)))
             .map(|_| ())
     });
-    println!("REQ: {:?}", srv.get("/").force_close());
     let response = srv.block_on(srv.get("/").force_close().send()).unwrap();
-    println!("RES: {:?}", response);
     assert!(response.status().is_success());
 }
 

awc/CHANGES.md

@@ -1,5 +1,9 @@
 # Changes
 
+### Added
+
+* Allow to send headers in `Camel-Case` form.
+
 ## [0.1.1] - 2019-04-19
 
 ### Added

awc/src/request.rs

@@ -235,6 +235,13 @@ impl ClientRequest {
         self
     }
 
+    /// Send headers in `Camel-Case` form.
+    #[inline]
+    pub fn camel_case(mut self) -> Self {
+        self.head.set_camel_case_headers(true);
+        self
+    }
+
     /// Force close connection instead of returning it back to connections pool.
     /// This setting affect only http/1 connections.
     #[inline]

awc/tests/test_client.rs

@@ -90,6 +90,10 @@ fn test_simple() {
     // read response
     let bytes = srv.block_on(response.body()).unwrap();
     assert_eq!(bytes, Bytes::from_static(STR.as_ref()));
+
+    // camel case
+    let response = srv.block_on(srv.post("/").camel_case().send()).unwrap();
+    assert!(response.status().is_success());
 }
 
 #[test]

src/middleware/identity.rs

@@ -49,10 +49,12 @@
 //! ```
 use std::cell::RefCell;
 use std::rc::Rc;
+use std::time::SystemTime;
 
 use actix_service::{Service, Transform};
 use futures::future::{ok, Either, FutureResult};
 use futures::{Future, IntoFuture, Poll};
+use serde::{Deserialize, Serialize};
 use time::Duration;
 
 use crate::cookie::{Cookie, CookieJar, Key, SameSite};
@@ -284,84 +286,133 @@ where
 
 struct CookieIdentityInner {
     key: Key,
+    key_v2: Key,
     name: String,
     path: String,
     domain: Option<String>,
     secure: bool,
     max_age: Option<Duration>,
     same_site: Option<SameSite>,
+    visit_deadline: Option<Duration>,
+    login_deadline: Option<Duration>,
+}
+
+#[derive(Deserialize, Serialize, Debug)]
+struct CookieValue {
+    identity: String,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    login_timestamp: Option<SystemTime>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    visit_timestamp: Option<SystemTime>,
+}
+
+#[derive(Debug)]
+struct CookieIdentityExtention {
+    login_timestamp: Option<SystemTime>
 }
 
 impl CookieIdentityInner {
     fn new(key: &[u8]) -> CookieIdentityInner {
+        let key_v2: Vec<u8> = key.iter().chain([1, 0, 0, 0].iter()).map(|e| *e).collect();
         CookieIdentityInner {
             key: Key::from_master(key),
+            key_v2: Key::from_master(&key_v2),
             name: "actix-identity".to_owned(),
             path: "/".to_owned(),
             domain: None,
             secure: true,
             max_age: None,
             same_site: None,
+            visit_deadline: None,
+            login_deadline: None,
         }
     }
 
     fn set_cookie<B>(
         &self,
         resp: &mut ServiceResponse<B>,
-        id: Option<String>,
+        value: Option<CookieValue>,
     ) -> Result<()> {
-        let some = id.is_some();
+        let add_cookie = value.is_some();
-        {
+        let val = value.map(|val| if !self.legacy_supported() {
-            let id = id.unwrap_or_else(String::new);
+            serde_json::to_string(&val)
-            let mut cookie = Cookie::new(self.name.clone(), id);
+        } else {
-            cookie.set_path(self.path.clone());
+            Ok(val.identity)
-            cookie.set_secure(self.secure);
+        });
-            cookie.set_http_only(true);
+        let mut cookie = Cookie::new(self.name.clone(), val.unwrap_or_else(|| Ok(String::new()))?);
+        cookie.set_path(self.path.clone());
+        cookie.set_secure(self.secure);
+        cookie.set_http_only(true);
 
-            if let Some(ref domain) = self.domain {
+        if let Some(ref domain) = self.domain {
-                cookie.set_domain(domain.clone());
+            cookie.set_domain(domain.clone());
-            }
-
-            if let Some(max_age) = self.max_age {
-                cookie.set_max_age(max_age);
-            }
-
-            if let Some(same_site) = self.same_site {
-                cookie.set_same_site(same_site);
-            }
-
-            let mut jar = CookieJar::new();
-            if some {
-                jar.private(&self.key).add(cookie);
-            } else {
-                jar.add_original(cookie.clone());
-                jar.private(&self.key).remove(cookie);
-            }
-
-            for cookie in jar.delta() {
-                let val = HeaderValue::from_str(&cookie.to_string())?;
-                resp.headers_mut().append(header::SET_COOKIE, val);
-            }
         }
 
+        if let Some(max_age) = self.max_age {
+            cookie.set_max_age(max_age);
+        }
+
+        if let Some(same_site) = self.same_site {
+            cookie.set_same_site(same_site);
+        }
+
+        let mut jar = CookieJar::new();
+        let key = if self.legacy_supported() {&self.key} else {&self.key_v2};
+        if add_cookie {
+            jar.private(&key).add(cookie);
+        } else {
+            jar.add_original(cookie.clone());
+            jar.private(&key).remove(cookie);
+        }
+        for cookie in jar.delta() {
+            let val = HeaderValue::from_str(&cookie.to_string())?;
+            resp.headers_mut().append(header::SET_COOKIE, val);
+        }
         Ok(())
     }
 
-    fn load(&self, req: &ServiceRequest) -> Option<String> {
+    fn load(&self, req: &ServiceRequest) -> Option<CookieValue> {
-        if let Ok(cookies) = req.cookies() {
+        let cookie = req.cookie(&self.name)?;
-            for cookie in cookies.iter() {
+        let mut jar = CookieJar::new();
-                if cookie.name() == self.name {
+        jar.add_original(cookie.clone());
-                    let mut jar = CookieJar::new();
+        let res = if self.legacy_supported() {
-                    jar.add_original(cookie.clone());
+            jar.private(&self.key).get(&self.name).map(|n| CookieValue {
+                identity: n.value().to_string(),
+                login_timestamp: None,
+                visit_timestamp: None
+            })
+        } else {
+            None
+        };
+        res.or_else(|| jar.private(&self.key_v2).get(&self.name).and_then(|c| self.parse(c)))
+    }
 
-                    let cookie_opt = jar.private(&self.key).get(&self.name);
+    fn parse(&self, cookie: Cookie) -> Option<CookieValue> {
-                    if let Some(cookie) = cookie_opt {
+        let value: CookieValue = serde_json::from_str(cookie.value()).ok()?;
-                        return Some(cookie.value().into());
+        let now = SystemTime::now();
-                    }
+        if let Some(visit_deadline) = self.visit_deadline {
-                }
+            if now.duration_since(value.visit_timestamp?).ok()? > visit_deadline.to_std().ok()? {
+                return None;
             }
         }
-        None
+        if let Some(login_deadline) = self.login_deadline {
+            if now.duration_since(value.login_timestamp?).ok()? > login_deadline.to_std().ok()? {
+                return None;
+            }
+        }
+        Some(value)
+    }
+
+    fn legacy_supported(&self) -> bool {
+        self.visit_deadline.is_none() && self.login_deadline.is_none()
+    }
+
+    fn always_update_cookie(&self) -> bool {
+        self.visit_deadline.is_some()
+    }
+
+    fn requires_oob_data(&self) -> bool {
+        self.login_deadline.is_some()
     }
 }
 
@@ -443,6 +494,18 @@ impl CookieIdentityPolicy {
         Rc::get_mut(&mut self.0).unwrap().same_site = Some(same_site);
         self
     }
+
+    /// Accepts only users whose cookie has been seen before the given deadline
+    pub fn visit_deadline(mut self, value: Duration) -> CookieIdentityPolicy {
+        Rc::get_mut(&mut self.0).unwrap().visit_deadline = Some(value);
+        self
+    }
+
+    /// Accepts only users which has been authenticated before the given deadline
+    pub fn login_deadline(mut self, value: Duration) -> CookieIdentityPolicy {
+        Rc::get_mut(&mut self.0).unwrap().login_deadline = Some(value);
+        self
+    }
 }
 
 impl IdentityPolicy for CookieIdentityPolicy {
@@ -450,7 +513,12 @@ impl IdentityPolicy for CookieIdentityPolicy {
     type ResponseFuture = Result<(), Error>;
 
     fn from_request(&self, req: &mut ServiceRequest) -> Self::Future {
-        Ok(self.0.load(req))
+        Ok(self.0.load(req).map(|CookieValue {identity, login_timestamp, ..}| {
+            if self.0.requires_oob_data() {
+               req.extensions_mut().insert(CookieIdentityExtention { login_timestamp });
+            }
+            identity
+        }))
     }
 
     fn to_response<B>(
@@ -459,9 +527,28 @@ impl IdentityPolicy for CookieIdentityPolicy {
         changed: bool,
         res: &mut ServiceResponse<B>,
     ) -> Self::ResponseFuture {
-        if changed {
+        let _ = if changed {
-            let _ = self.0.set_cookie(res, id);
+            let login_timestamp = SystemTime::now();
-        }
+            self.0.set_cookie(res, id.map(|identity| CookieValue {
+                identity,
+                login_timestamp: self.0.login_deadline.map(|_| login_timestamp),
+                visit_timestamp: self.0.visit_deadline.map(|_| login_timestamp)
+            }))
+        } else if self.0.always_update_cookie() && id.is_some() {
+            let visit_timestamp = SystemTime::now();
+            let mut login_timestamp = None;
+            if self.0.requires_oob_data() {
+                let CookieIdentityExtention { login_timestamp: lt } = res.request().extensions_mut().remove().unwrap();
+                login_timestamp = lt;
+            }
+            self.0.set_cookie(res, Some(CookieValue {
+                identity: id.unwrap(),
+                login_timestamp,
+                visit_timestamp: self.0.visit_deadline.map(|_| visit_timestamp)
+            }))
+        } else {
+            Ok(())
+        };
         Ok(())
     }
 }
@@ -473,14 +560,20 @@ mod tests {
     use crate::test::{self, TestRequest};
     use crate::{web, App, HttpResponse};
 
+    use std::borrow::Borrow;
+
+    const COOKIE_KEY_MASTER: [u8; 32] = [0; 32];
+    const COOKIE_NAME: &'static str = "actix_auth";
+    const COOKIE_LOGIN: &'static str = "test";
+
     #[test]
     fn test_identity() {
         let mut srv = test::init_service(
             App::new()
                 .wrap(IdentityService::new(
-                    CookieIdentityPolicy::new(&[0; 32])
+                    CookieIdentityPolicy::new(&COOKIE_KEY_MASTER)
                         .domain("www.rust-lang.org")
-                        .name("actix_auth")
+                        .name(COOKIE_NAME)
                         .path("/")
                         .secure(true),
                 ))
@@ -492,7 +585,7 @@ mod tests {
                     }
                 }))
                 .service(web::resource("/login").to(|id: Identity| {
-                    id.remember("test".to_string());
+                    id.remember(COOKIE_LOGIN.to_string());
                     HttpResponse::Ok()
                 }))
                 .service(web::resource("/logout").to(|id: Identity| {
@@ -537,9 +630,9 @@ mod tests {
         let mut srv = test::init_service(
             App::new()
                 .wrap(IdentityService::new(
-                    CookieIdentityPolicy::new(&[0; 32])
+                    CookieIdentityPolicy::new(&COOKIE_KEY_MASTER)
                         .domain("www.rust-lang.org")
-                        .name("actix_auth")
+                        .name(COOKIE_NAME)
                         .path("/")
                         .max_age_time(duration)
                         .secure(true),
@@ -563,9 +656,9 @@ mod tests {
         let mut srv = test::init_service(
             App::new()
                 .wrap(IdentityService::new(
-                    CookieIdentityPolicy::new(&[0; 32])
+                    CookieIdentityPolicy::new(&COOKIE_KEY_MASTER)
                         .domain("www.rust-lang.org")
-                        .name("actix_auth")
+                        .name(COOKIE_NAME)
                         .path("/")
                         .max_age(seconds)
                         .secure(true),
@@ -582,4 +675,237 @@ mod tests {
         let c = resp.response().cookies().next().unwrap().to_owned();
         assert_eq!(Duration::seconds(seconds as i64), c.max_age().unwrap());
     }
+
+    fn create_identity_server<F: Fn(CookieIdentityPolicy) -> CookieIdentityPolicy + Sync + Send + Clone + 'static>(f: F) -> impl actix_service::Service<Request = actix_http::Request, Response = ServiceResponse<actix_http::body::Body>, Error = actix_http::Error> {
+        test::init_service(
+            App::new()
+                .wrap(IdentityService::new(f(CookieIdentityPolicy::new(&COOKIE_KEY_MASTER).secure(false).name(COOKIE_NAME))))
+                .service(web::resource("/").to(|id: Identity| {
+                    let identity = id.identity();
+                    if identity.is_none() {
+                        id.remember(COOKIE_LOGIN.to_string())
+                    }
+                    web::Json(identity)
+                }))
+        )
+    }
+
+    fn legacy_login_cookie(identity: &'static str) -> Cookie<'static> {
+        let mut jar = CookieJar::new();
+        jar.private(&Key::from_master(&COOKIE_KEY_MASTER)).add(Cookie::new(COOKIE_NAME, identity));
+        jar.get(COOKIE_NAME).unwrap().clone()
+    }
+
+    fn login_cookie(identity: &'static str, login_timestamp: Option<SystemTime>, visit_timestamp: Option<SystemTime>) -> Cookie<'static> {
+        let mut jar = CookieJar::new();
+        let key: Vec<u8> = COOKIE_KEY_MASTER.iter().chain([1, 0, 0, 0].iter()).map(|e| *e).collect();
+        jar.private(&Key::from_master(&key)).add(Cookie::new(COOKIE_NAME, serde_json::to_string(&CookieValue {
+            identity: identity.to_string(),
+            login_timestamp,
+            visit_timestamp
+        }).unwrap()));
+        jar.get(COOKIE_NAME).unwrap().clone()
+    }
+
+    fn assert_logged_in(response: &mut ServiceResponse, identity: Option<&str>) {
+        use bytes::BytesMut;
+        use futures::Stream;
+        let bytes =
+            test::block_on(response.take_body().fold(BytesMut::new(), |mut b, c| {
+                b.extend(c);
+                Ok::<_, Error>(b)
+            }))
+            .unwrap();
+        let resp: Option<String> = serde_json::from_slice(&bytes[..]).unwrap();
+        assert_eq!(resp.as_ref().map(|s| s.borrow()), identity);
+    }
+
+    fn assert_legacy_login_cookie(response: &mut ServiceResponse, identity: &str) {
+        let mut cookies = CookieJar::new();
+        for cookie in response.headers().get_all(header::SET_COOKIE) {
+            cookies.add(Cookie::parse(cookie.to_str().unwrap().to_string()).unwrap());
+        }
+        let cookie = cookies.private(&Key::from_master(&COOKIE_KEY_MASTER)).get(COOKIE_NAME).unwrap();
+        assert_eq!(cookie.value(), identity);
+    }
+
+    enum LoginTimestampCheck {
+        NoTimestamp,
+        NewTimestamp,
+        OldTimestamp(SystemTime)
+    }
+
+    enum VisitTimeStampCheck {
+        NoTimestamp,
+        NewTimestamp
+    }
+
+    fn assert_login_cookie(response: &mut ServiceResponse, identity: &str, login_timestamp: LoginTimestampCheck, visit_timestamp: VisitTimeStampCheck) {
+        let mut cookies = CookieJar::new();
+        for cookie in response.headers().get_all(header::SET_COOKIE) {
+            cookies.add(Cookie::parse(cookie.to_str().unwrap().to_string()).unwrap());
+        }
+        let key: Vec<u8> = COOKIE_KEY_MASTER.iter().chain([1, 0, 0, 0].iter()).map(|e| *e).collect();
+        let cookie = cookies.private(&Key::from_master(&key)).get(COOKIE_NAME).unwrap();
+        let cv: CookieValue = serde_json::from_str(cookie.value()).unwrap();
+        assert_eq!(cv.identity, identity);
+        let now = SystemTime::now();
+        let t30sec_ago = now - Duration::seconds(30).to_std().unwrap();
+        match login_timestamp {
+            LoginTimestampCheck::NoTimestamp => assert_eq!(cv.login_timestamp, None),
+            LoginTimestampCheck::NewTimestamp => assert!(t30sec_ago <= cv.login_timestamp.unwrap() && cv.login_timestamp.unwrap() <= now),
+            LoginTimestampCheck::OldTimestamp(old_timestamp) => assert_eq!(cv.login_timestamp, Some(old_timestamp))
+        }
+        match visit_timestamp {
+            VisitTimeStampCheck::NoTimestamp => assert_eq!(cv.visit_timestamp, None),
+            VisitTimeStampCheck::NewTimestamp => assert!(t30sec_ago <= cv.visit_timestamp.unwrap() && cv.visit_timestamp.unwrap() <= now)
+        }
+    }
+
+    fn assert_no_login_cookie(response: &mut ServiceResponse) {
+        let mut cookies = CookieJar::new();
+        for cookie in response.headers().get_all(header::SET_COOKIE) {
+            cookies.add(Cookie::parse(cookie.to_str().unwrap().to_string()).unwrap());
+        }
+        assert!(cookies.get(COOKIE_NAME).is_none());
+    }
+
+    #[test]
+    fn test_identity_legacy_cookie_is_set() {
+        let mut srv = create_identity_server(|c| c);
+        let mut resp = test::call_service(
+            &mut srv,
+            TestRequest::with_uri("/")
+                .to_request()
+        );
+        assert_logged_in(&mut resp, None);
+        assert_legacy_login_cookie(&mut resp, COOKIE_LOGIN);
+    }
+
+    #[test]
+    fn test_identity_legacy_cookie_works() {
+        let mut srv = create_identity_server(|c| c);
+        let cookie = legacy_login_cookie(COOKIE_LOGIN);
+        let mut resp = test::call_service(
+            &mut srv,
+            TestRequest::with_uri("/")
+                .cookie(cookie.clone())
+                .to_request()
+        );
+        assert_logged_in(&mut resp, Some(COOKIE_LOGIN));
+        assert_no_login_cookie(&mut resp);
+    }
+
+    #[test]
+    fn test_identity_legacy_cookie_rejected_if_visit_timestamp_needed() {
+        let mut srv = create_identity_server(|c| c.visit_deadline(Duration::days(90)));
+        let cookie = legacy_login_cookie(COOKIE_LOGIN);
+        let mut resp = test::call_service(
+            &mut srv,
+            TestRequest::with_uri("/")
+                .cookie(cookie.clone())
+                .to_request()
+        );
+        assert_logged_in(&mut resp, None);
+        assert_login_cookie(&mut resp, COOKIE_LOGIN, LoginTimestampCheck::NoTimestamp, VisitTimeStampCheck::NewTimestamp);
+    }
+
+    #[test]
+    fn test_identity_legacy_cookie_rejected_if_login_timestamp_needed() {
+        let mut srv = create_identity_server(|c| c.login_deadline(Duration::days(90)));
+        let cookie = legacy_login_cookie(COOKIE_LOGIN);
+        let mut resp = test::call_service(
+            &mut srv,
+            TestRequest::with_uri("/")
+                .cookie(cookie.clone())
+                .to_request()
+        );
+        assert_logged_in(&mut resp, None);
+        assert_login_cookie(&mut resp, COOKIE_LOGIN, LoginTimestampCheck::NewTimestamp, VisitTimeStampCheck::NoTimestamp);
+    }
+
+    #[test]
+    fn test_identity_cookie_rejected_if_login_timestamp_needed() {
+        let mut srv = create_identity_server(|c| c.login_deadline(Duration::days(90)));
+        let cookie = login_cookie(COOKIE_LOGIN, None, Some(SystemTime::now()));
+        let mut resp = test::call_service(
+            &mut srv,
+            TestRequest::with_uri("/")
+                .cookie(cookie.clone())
+                .to_request()
+        );
+        assert_logged_in(&mut resp, None);
+        assert_login_cookie(&mut resp, COOKIE_LOGIN, LoginTimestampCheck::NewTimestamp, VisitTimeStampCheck::NoTimestamp);
+    }
+
+    #[test]
+    fn test_identity_cookie_rejected_if_visit_timestamp_needed() {
+        let mut srv = create_identity_server(|c| c.visit_deadline(Duration::days(90)));
+        let cookie = login_cookie(COOKIE_LOGIN, Some(SystemTime::now()), None);
+        let mut resp = test::call_service(
+            &mut srv,
+            TestRequest::with_uri("/")
+                .cookie(cookie.clone())
+                .to_request()
+        );
+        assert_logged_in(&mut resp, None);
+        assert_login_cookie(&mut resp, COOKIE_LOGIN, LoginTimestampCheck::NoTimestamp, VisitTimeStampCheck::NewTimestamp);
+    }
+
+    #[test]
+    fn test_identity_cookie_rejected_if_login_timestamp_too_old() {
+        let mut srv = create_identity_server(|c| c.login_deadline(Duration::days(90)));
+        let cookie = login_cookie(COOKIE_LOGIN, Some(SystemTime::now() - Duration::days(180).to_std().unwrap()), None);
+        let mut resp = test::call_service(
+            &mut srv,
+            TestRequest::with_uri("/")
+                .cookie(cookie.clone())
+                .to_request()
+        );
+        assert_logged_in(&mut resp, None);
+        assert_login_cookie(&mut resp, COOKIE_LOGIN, LoginTimestampCheck::NewTimestamp, VisitTimeStampCheck::NoTimestamp);
+    }
+
+    #[test]
+    fn test_identity_cookie_rejected_if_visit_timestamp_too_old() {
+        let mut srv = create_identity_server(|c| c.visit_deadline(Duration::days(90)));
+        let cookie = login_cookie(COOKIE_LOGIN, None, Some(SystemTime::now() - Duration::days(180).to_std().unwrap()));
+        let mut resp = test::call_service(
+            &mut srv,
+            TestRequest::with_uri("/")
+                .cookie(cookie.clone())
+                .to_request()
+        );
+        assert_logged_in(&mut resp, None);
+        assert_login_cookie(&mut resp, COOKIE_LOGIN, LoginTimestampCheck::NoTimestamp, VisitTimeStampCheck::NewTimestamp);
+    }
+
+    #[test]
+    fn test_identity_cookie_not_updated_on_login_deadline() {
+        let mut srv = create_identity_server(|c| c.login_deadline(Duration::days(90)));
+        let cookie = login_cookie(COOKIE_LOGIN, Some(SystemTime::now()), None);
+        let mut resp = test::call_service(
+            &mut srv,
+            TestRequest::with_uri("/")
+                .cookie(cookie.clone())
+                .to_request()
+        );
+        assert_logged_in(&mut resp, Some(COOKIE_LOGIN));
+        assert_no_login_cookie(&mut resp);
+    }
+
+    #[test]
+    fn test_identity_cookie_updated_on_visit_deadline() {
+        let mut srv = create_identity_server(|c| c.visit_deadline(Duration::days(90)).login_deadline(Duration::days(90)));
+        let timestamp = SystemTime::now() - Duration::days(1).to_std().unwrap();
+        let cookie = login_cookie(COOKIE_LOGIN, Some(timestamp), Some(timestamp));
+        let mut resp = test::call_service(
+            &mut srv,
+            TestRequest::with_uri("/")
+                .cookie(cookie.clone())
+                .to_request()
+        );
+        assert_logged_in(&mut resp, Some(COOKIE_LOGIN));
+        assert_login_cookie(&mut resp, COOKIE_LOGIN, LoginTimestampCheck::OldTimestamp(timestamp), VisitTimeStampCheck::NewTimestamp);
+    }
 }

src/responder.rs

@@ -1,8 +1,12 @@
 use actix_http::error::InternalError;
-use actix_http::{http::StatusCode, Error, Response, ResponseBuilder};
+use actix_http::http::{
+    header::IntoHeaderValue, Error as HttpError, HeaderMap, HeaderName, HttpTryFrom,
+    StatusCode,
+};
+use actix_http::{Error, Response, ResponseBuilder};
 use bytes::{Bytes, BytesMut};
 use futures::future::{err, ok, Either as EitherFuture, FutureResult};
-use futures::{Future, IntoFuture, Poll};
+use futures::{try_ready, Async, Future, IntoFuture, Poll};
 
 use crate::request::HttpRequest;
 
@@ -18,6 +22,51 @@ pub trait Responder {
 
     /// Convert itself to `AsyncResult` or `Error`.
     fn respond_to(self, req: &HttpRequest) -> Self::Future;
+
+    /// Override a status code for a responder.
+    ///
+    /// ```rust
+    /// use actix_web::{HttpRequest, Responder, http::StatusCode};
+    ///
+    /// fn index(req: HttpRequest) -> impl Responder {
+    ///     "Welcome!".with_status(StatusCode::OK)
+    /// }
+    /// # fn main() {}
+    /// ```
+    fn with_status(self, status: StatusCode) -> CustomResponder<Self>
+    where
+        Self: Sized,
+    {
+        CustomResponder::new(self).with_status(status)
+    }
+
+    /// Add extra header to the responder's response.
+    ///
+    /// ```rust
+    /// use actix_web::{web, HttpRequest, Responder};
+    /// use serde::Serialize;
+    ///
+    /// #[derive(Serialize)]
+    /// struct MyObj {
+    ///     name: String,
+    /// }
+    ///
+    /// fn index(req: HttpRequest) -> impl Responder {
+    ///     web::Json(
+    ///         MyObj{name: "Name".to_string()}
+    ///     )
+    ///     .with_header("x-version", "1.2.3")
+    /// }
+    /// # fn main() {}
+    /// ```
+    fn with_header<K, V>(self, key: K, value: V) -> CustomResponder<Self>
+    where
+        Self: Sized,
+        HeaderName: HttpTryFrom<K>,
+        V: IntoHeaderValue,
+    {
+        CustomResponder::new(self).with_header(key, value)
+    }
 }
 
 impl Responder for Response {
@@ -154,6 +203,117 @@ impl Responder for BytesMut {
     }
 }
 
+/// Allows to override status code and headers for a responder.
+pub struct CustomResponder<T> {
+    responder: T,
+    status: Option<StatusCode>,
+    headers: Option<HeaderMap>,
+    error: Option<HttpError>,
+}
+
+impl<T: Responder> CustomResponder<T> {
+    fn new(responder: T) -> Self {
+        CustomResponder {
+            responder,
+            status: None,
+            headers: None,
+            error: None,
+        }
+    }
+
+    /// Override a status code for the responder's response.
+    ///
+    /// ```rust
+    /// use actix_web::{HttpRequest, Responder, http::StatusCode};
+    ///
+    /// fn index(req: HttpRequest) -> impl Responder {
+    ///     "Welcome!".with_status(StatusCode::OK)
+    /// }
+    /// # fn main() {}
+    /// ```
+    pub fn with_status(mut self, status: StatusCode) -> Self {
+        self.status = Some(status);
+        self
+    }
+
+    /// Add extra header to the responder's response.
+    ///
+    /// ```rust
+    /// use actix_web::{web, HttpRequest, Responder};
+    /// use serde::Serialize;
+    ///
+    /// #[derive(Serialize)]
+    /// struct MyObj {
+    ///     name: String,
+    /// }
+    ///
+    /// fn index(req: HttpRequest) -> impl Responder {
+    ///     web::Json(
+    ///         MyObj{name: "Name".to_string()}
+    ///     )
+    ///     .with_header("x-version", "1.2.3")
+    /// }
+    /// # fn main() {}
+    /// ```
+    pub fn with_header<K, V>(mut self, key: K, value: V) -> Self
+    where
+        HeaderName: HttpTryFrom<K>,
+        V: IntoHeaderValue,
+    {
+        if self.headers.is_none() {
+            self.headers = Some(HeaderMap::new());
+        }
+
+        match HeaderName::try_from(key) {
+            Ok(key) => match value.try_into() {
+                Ok(value) => {
+                    self.headers.as_mut().unwrap().append(key, value);
+                }
+                Err(e) => self.error = Some(e.into()),
+            },
+            Err(e) => self.error = Some(e.into()),
+        };
+        self
+    }
+}
+
+impl<T: Responder> Responder for CustomResponder<T> {
+    type Error = T::Error;
+    type Future = CustomResponderFut<T>;
+
+    fn respond_to(self, req: &HttpRequest) -> Self::Future {
+        CustomResponderFut {
+            fut: self.responder.respond_to(req).into_future(),
+            status: self.status,
+            headers: self.headers,
+        }
+    }
+}
+
+pub struct CustomResponderFut<T: Responder> {
+    fut: <T::Future as IntoFuture>::Future,
+    status: Option<StatusCode>,
+    headers: Option<HeaderMap>,
+}
+
+impl<T: Responder> Future for CustomResponderFut<T> {
+    type Item = Response;
+    type Error = T::Error;
+
+    fn poll(&mut self) -> Poll<Self::Item, Self::Error> {
+        let mut res = try_ready!(self.fut.poll());
+        if let Some(status) = self.status {
+            *res.status_mut() = status;
+        }
+        if let Some(ref headers) = self.headers {
+            for (k, v) in headers {
+                res.headers_mut().insert(k.clone(), v.clone());
+            }
+        }
+        Ok(Async::Ready(res))
+    }
+}
+
 /// Combines two different responder types into a single type
 ///
 /// ```rust
@@ -435,4 +595,33 @@ pub(crate) mod tests {
         );
         assert!(res.is_err());
     }
+
+    #[test]
+    fn test_custom_responder() {
+        let req = TestRequest::default().to_http_request();
+        let res = block_on(
+            "test"
+                .to_string()
+                .with_status(StatusCode::BAD_REQUEST)
+                .respond_to(&req),
+        )
+        .unwrap();
+        assert_eq!(res.status(), StatusCode::BAD_REQUEST);
+        assert_eq!(res.body().bin_ref(), b"test");
+
+        let res = block_on(
+            "test"
+                .to_string()
+                .with_header("content-type", "json")
+                .respond_to(&req),
+        )
+        .unwrap();
+
+        assert_eq!(res.status(), StatusCode::OK);
+        assert_eq!(res.body().bin_ref(), b"test");
+        assert_eq!(
+            res.headers().get(CONTENT_TYPE).unwrap(),
+            HeaderValue::from_static("json")
+        );
+    }
 }