Add method_ref, uri_ref, headers_ref to request::Builder (#284)

src/request.rs

@@ -771,6 +771,34 @@ impl Builder {
         self
     }
 
+    /// Get the HTTP Method for this request.
+    /// 
+    /// By default this is `GET`.
+    /// if builder has error, returns None.
+    /// 
+    /// # Examples
+    /// 
+    /// ```
+    /// # use http::*;
+    /// 
+    /// let mut req = Request::builder();
+    /// assert_eq!(req.method_ref(),Some(&Method::GET));
+    /// req.method("POST");
+    /// assert_eq!(req.method_ref(),Some(&Method::POST));
+    /// req.method("DELETE");
+    /// assert_eq!(req.method_ref(),Some(&Method::DELETE));
+    /// ```
+    pub fn method_ref(&self) -> Option<&Method>
+    {
+        if self.err.is_some() {
+            return None
+        }
+        match self.head {
+            Some(ref head) => Some(&head.method),
+            None => None
+        }
+    }
+
     /// Set the URI for this request.
     ///
     /// This function will configure the URI of the `Request` that will
@@ -800,6 +828,31 @@ impl Builder {
         self
     }
 
+    /// Get the URI for this request
+    /// 
+    /// By default this is `/`
+    /// # Examples
+    /// 
+    /// ```
+    /// # use http::*;
+    /// 
+    /// let mut req = Request::builder();
+    /// assert_eq!(req.uri_ref().unwrap().to_string(), "/" );
+    /// req.uri("https://www.rust-lang.org/");
+    /// assert_eq!(req.uri_ref().unwrap().to_string(), "https://www.rust-lang.org/" );
+    /// ```
+    pub fn uri_ref(&self) -> Option<&Uri>
+    {
+        if self.err.is_some() {
+            return None;
+        }
+        match self.head
+        {
+            Some(ref head) => Some(&head.uri),
+            None => None
+        }
+    }
+
     /// Set the HTTP version for this request.
     ///
     /// This function will configure the HTTP version of the `Request` that
@@ -860,6 +913,33 @@ impl Builder {
         self
     }
 
+    /// Get header on this request builder.
+    /// when builder has error returns None
+    /// 
+    /// # Example
+    /// 
+    /// ```
+    /// # use http::*;
+    /// # use http::header::HeaderValue;
+    /// # use http::request::Builder;
+    /// let mut req = Request::builder();
+    /// req.header("Accept", "text/html")
+    ///    .header("X-Custom-Foo", "bar");
+    /// let headers = req.headers_ref().unwrap();
+    /// assert_eq!( headers["Accept"], "text/html" );
+    /// assert_eq!( headers["X-Custom-Foo"], "bar" );
+    /// ```
+    pub fn headers_ref(&self) -> Option<&HeaderMap<HeaderValue>> {
+        if self.err.is_some() {
+            return None;
+        }
+        match self.head
+        {
+            Some(ref head) => Some(&head.headers),
+            None => None
+        }
+    }
+
     /// Adds an extension to this builder
     ///
     /// # Examples