From 63376de793de38d7dbfae2ce61303c26fea92a1d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?H=C3=A9ctor=20Ram=C3=B3n?= <hector0193@gmail.com>
Date: Thu, 21 May 2020 19:46:56 +0200
Subject: [PATCH] Implement `Response::content_length` for `wasm32` (#863)

---
 src/wasm/response.rs | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/src/wasm/response.rs b/src/wasm/response.rs
index 765606c..0f77c49 100644
--- a/src/wasm/response.rs
+++ b/src/wasm/response.rs
@@ -45,6 +45,22 @@ impl Response {
         self.http.headers_mut()
     }
 
+    /// Get the content-length of this response, if known.
+    ///
+    /// Reasons it may not be known:
+    ///
+    /// - The server didn't send a `content-length` header.
+    /// - The response is compressed and automatically decoded (thus changing
+    //   the actual decoded length).
+    pub fn content_length(&self) -> Option<u64> {
+        self.headers()
+            .get(http::header::CONTENT_LENGTH)?
+            .to_str()
+            .ok()?
+            .parse()
+            .ok()
+    }
+
     /// Get the final `Url` of this `Response`.
     #[inline]
     pub fn url(&self) -> &Url {