Can finalize Matrix authentication

matrixgw_backend/src/extractors/auth_extractor.rs

@@ -11,6 +11,8 @@ use anyhow::Context;
 use bytes::Bytes;
 use jwt_simple::common::VerificationOptions;
 use jwt_simple::prelude::{Duration, HS256Key, MACLike};
+use jwt_simple::reexports::serde_json;
+use serde::de::DeserializeOwned;
 use sha2::{Digest, Sha256};
 use std::fmt::Display;
 use std::net::IpAddr;
@@ -32,6 +34,16 @@ pub struct AuthExtractor {
     pub payload: Option<Vec<u8>>,
 }
 
+impl AuthExtractor {
+    pub fn decode_json_body<E: DeserializeOwned + Send>(&self) -> anyhow::Result<E> {
+        let payload = self
+            .payload
+            .as_ref()
+            .context("Failed to decode request as json: missing payload!")?;
+        serde_json::from_slice(payload).context("Failed to decode request json!")
+    }
+}
+
 #[derive(Debug, Eq, PartialEq)]
 pub struct MatrixJWTKID {
     pub user_email: UserEmail,