add header doc

httpsig-hyper/src/lib.rs

@@ -1,3 +1,9 @@
+//! # httpsig-hyper
+//!
+//! `httpsig-hyper` is a crate that provides a convenient API for `Hyper` users to handle HTTP signatures.
+//! This crate extends hyper's https request and response messages with the ability to generate and verify HTTP signatures.
+//! Additionally it also provides a way to set and verify content-digest header.
+
 mod error;
 mod hyper_content_digest;
 mod hyper_http;

httpsig/src/lib.rs

@@ -1,3 +1,10 @@
+//! # httpsig
+//!
+//! `httpsig` is a library for raw HTTP Signature.
+//! It provides a simple API for signing and verifying HTTP messages, and does not depends on any HTTP framework.
+//! It simply handles header keys and values in `String` or `&str` as HTTP message components, which means it can be used in any HTTP framework but requires complicated handling of HTTP headers.
+//! We thus recommend to use [`httpsig-hyper`](https://crates.io/crates/httpsig-hyper) for `Hyper`` users, which provides a more convenient API.
+
 mod crypto;
 mod error;
 mod message_component;

httpsig/src/signature_base.rs

@@ -119,6 +119,7 @@ impl HttpSignatureHeaders {
 }
 
 #[derive(Debug, Clone)]
+/// Wrapper struct of raw signature bytes
 pub struct HttpSignature(Vec<u8>);
 impl std::fmt::Display for HttpSignature {
   fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {