repeated headers

src/request.rs

@@ -177,7 +177,9 @@ impl Request {
         K: Into<String>,
         V: Into<String>,
     {
-        add_request_header(self, header.into(), value.into());
+        let s = format!("{}: {}", header.into(), value.into());
+        let header = s.parse::<Header>().expect("Failed to parse header");
+        add_header(header, &mut self.headers);
         self
     }
 
@@ -208,6 +210,26 @@ impl Request {
         self.get(name).is_some()
     }
 
+    /// All headers corresponding values for the give name, or empty vector.
+    ///
+    /// ```
+    /// let req = ureq::get("/my_page")
+    ///     .set("X-Forwarded-For", "1.2.3.4")
+    ///     .set("X-Forwarded-For", "2.3.4.5")
+    ///     .build();
+    /// assert_eq!(req.get_all("x-forwarded-for"), vec![
+    ///     "1.2.3.4",
+    ///     "2.3.4.5",
+    /// ]);
+    /// ```
+    pub fn get_all<'a>(&self, name: &'a str) -> Vec<&str> {
+        self.headers
+            .iter()
+            .filter(|h| h.is_name(name))
+            .map(|h| h.value())
+            .collect()
+    }
+
     /// Set many headers.
     ///
     /// ```
@@ -234,7 +256,9 @@ impl Request {
         I: IntoIterator<Item = (K, V)>,
     {
         for (k, v) in headers.into_iter() {
-            add_request_header(self, k.into(), v.into());
+            let s = format!("{}: {}", k.into(), v.into());
+            let header = s.parse::<Header>().expect("Failed to parse header");
+            add_header(header, &mut self.headers);
         }
         self
     }