add the ability to deserialize JSON from a response body directly

src/client.rs

@@ -7,7 +7,7 @@ use hyper::status::StatusCode;
 use hyper::version::HttpVersion;
 use hyper::{Url};
 
-use serde::Serialize;
+use serde::{Deserialize, Serialize};
 use serde_json;
 use serde_urlencoded;
 
@@ -275,6 +275,11 @@ impl Response {
     pub fn version(&self) -> &HttpVersion {
         &self.inner.version
     }
+
+    /// Try and deserialize the response body as JSON.
+    pub fn json<T: Deserialize>(&mut self) -> ::Result<T> {
+        serde_json::from_reader(self).map_err(::Error::from)
+    }
 }
 
 /// Read the body of the Response.

src/error.rs

@@ -68,5 +68,11 @@ impl From<::serde_urlencoded::ser::Error> for Error {
     }
 }
 
+impl From<::serde_json::Error> for Error {
+    fn from(err: ::serde_json::Error) -> Error {
+        Error::Serialize(Box::new(err))
+    }
+}
+
 /// A `Result` alias where the `Err` case is `reqwest::Error`.
 pub type Result<T> = ::std::result::Result<T, Error>;