2 files changed, 26 insertions, 0 deletions
diff --git a/src/lib.rs b/src/lib.rs
index 0841e0b..2f30028 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,5 +1,8 @@
 //! A lightweight layer on top of [Hyper](https://hyper.rs/)
 //! to facilitate building web applications.
+
+#![cfg_attr(docsrs, feature(doc_cfg))]
+
 pub use mime;
 pub use httpdate;
 
diff --git a/src/request.rs b/src/request.rs
index 509e2e7..5b5679d 100644
--- a/src/request.rs
+++ b/src/request.rs
@@ -96,6 +96,11 @@ pub trait SputnikBody {
     ///
     /// The HTML form must embed a hidden input generated with [`crate::request::SputnikParts::csrf_html_input`].
     async fn into_form_csrf<T: DeserializeOwned>(self, req: &mut Parts) -> Result<T, CsrfProtectedFormError>;
+
+    /// Attempts to deserialize the request body as JSON.
+    #[cfg(feature = "json")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "json")))]
+    async fn into_json<T: DeserializeOwned>(self) -> Result<T, JsonError>;
 }
 
 fn csrf_token_from_cookies(req: &mut Parts) -> Option<String> {
@@ -125,6 +130,13 @@ impl SputnikBody for hyper::Body {
             None => Err(CsrfProtectedFormError::NoCookie)
         }
     }
+
+    #[cfg(feature = "json")]
+    #[cfg_attr(docsrs, doc(cfg(feature = "json")))]
+    async fn into_json<T: DeserializeOwned>(self) -> Result<T, JsonError> {
+        let full_body = self.into_bytes().await?;
+        Ok(serde_json::from_slice::<T>(&full_body)?)
+    }
 }
 
 #[derive(Deserialize)]
@@ -156,6 +168,17 @@ pub enum FormError {
     Deserialize(#[from] serde_urlencoded::de::Error),
 }
 
+#[cfg(feature = "json")]
+#[cfg_attr(docsrs, doc(cfg(feature = "json")))]
+#[derive(thiserror::Error, Debug)]
+pub enum JsonError {
+    #[error("{0}")]
+    Body(#[from] BodyError),
+
+    #[error("json deserialize error: {0}")]
+    Deserialize(#[from] serde_json::Error),
+}
+
 #[derive(thiserror::Error, Debug)]
 pub enum CsrfProtectedFormError {
     #[error("{0}")]