Remove content_length from ResponseBuilder (#1491)

* Remove content_length since it'll be overwritten by the response body. FIXES #1439

* Add setting of Content-Length to the no_chunking function

* Add changes and migration documentations

* Update MIGRATION.md

Co-authored-by: Yuki Okushi <huyuumi.dev@gmail.com>

Co-authored-by: Rob Ede <robjtede@icloud.com>
Co-authored-by: Yuki Okushi <huyuumi.dev@gmail.com>

MIGRATION.md

@@ -6,6 +6,8 @@
 
 * actix-http support for Actors messages was moved to actix-http crate and is enabled 
   with feature `actors`
+* content_length function is removed from actix-http.
+  You can set Content-Length by normally setting the response body or calling no_chunking function. 
 
 * `BodySize::Sized64` variant has been removed. `BodySize::Sized` now receives a
   `u64` instead of a `usize`.

actix-http/CHANGES.md

@@ -5,6 +5,7 @@
 ### Changed
 
 * Bump minimum supported Rust version to 1.40
+* content_length function is removed, and you can set Content-Length by calling no_chunking function [#1439]
 
 * `BodySize::Sized64` variant has been removed. `BodySize::Sized` now receives a
   `u64` instead of a `usize`.
@@ -13,6 +14,9 @@
 
 * Support parsing of `SameSite=None` [#1503]
 
+[#1439]: https://github.com/actix/actix-web/pull/1439
+[#1503]: https://github.com/actix/actix-web/pull/1503
+
 ## [2.0.0-alpha.3] - 2020-05-08
 
 ### Fixed

actix-http/src/response.rs

@@ -472,7 +472,9 @@ impl ResponseBuilder {
 
     /// Disable chunked transfer encoding for HTTP/1.1 streaming responses.
     #[inline]
-    pub fn no_chunking(&mut self) -> &mut Self {
+    pub fn no_chunking(&mut self, len: u64) -> &mut Self {
+        self.header(header::CONTENT_LENGTH, len);
+
         if let Some(parts) = parts(&mut self.head, &self.err) {
             parts.no_chunking(true);
         }
@@ -497,12 +499,6 @@ impl ResponseBuilder {
         self
     }
 
-    /// Set content length
-    #[inline]
-    pub fn content_length(&mut self, len: u64) -> &mut Self {
-        self.header(header::CONTENT_LENGTH, len)
-    }
-
     /// Set a cookie
     ///
     /// ```rust

actix-http/tests/test_openssl.rs

@@ -275,7 +275,7 @@ async fn test_h2_head_binary() {
     let mut srv = test_server(move || {
         HttpService::build()
             .h2(|_| {
-                ok::<_, ()>(Response::Ok().content_length(STR.len() as u64).body(STR))
+                ok::<_, ()>(Response::Ok().body(STR))
             })
             .openssl(ssl_acceptor())
             .map_err(|_| ())

actix-http/tests/test_rustls.rs

@@ -281,7 +281,7 @@ async fn test_h2_head_binary() {
     let mut srv = test_server(move || {
         HttpService::build()
             .h2(|_| {
-                ok::<_, ()>(Response::Ok().content_length(STR.len() as u64).body(STR))
+                ok::<_, ()>(Response::Ok().body(STR))
             })
             .rustls(ssl_acceptor())
     })

actix-http/tests/test_server.rs

@@ -490,7 +490,7 @@ async fn test_h1_head_binary() {
     let mut srv = test_server(|| {
         HttpService::build()
             .h1(|_| {
-                ok::<_, ()>(Response::Ok().content_length(STR.len() as u64).body(STR))
+                ok::<_, ()>(Response::Ok().body(STR))
             })
             .tcp()
     })

tests/test_server.rs

@@ -349,7 +349,7 @@ async fn test_body_br_streaming() {
 async fn test_head_binary() {
     let srv = test::start_with(test::config().h1(), || {
         App::new().service(web::resource("/").route(
-            web::head().to(move || HttpResponse::Ok().content_length(100).body(STR)),
+            web::head().to(move || HttpResponse::Ok().body(STR)),
         ))
     });
 
@@ -371,8 +371,7 @@ async fn test_no_chunking() {
     let srv = test::start_with(test::config().h1(), || {
         App::new().service(web::resource("/").route(web::to(move || {
             HttpResponse::Ok()
-                .no_chunking()
-                .content_length(STR.len() as u64)
+                .no_chunking(STR.len() as u64)
                 .streaming(TestBody::new(Bytes::from_static(STR.as_ref()), 24))
         })))
     });