separate signer.

fix ilm feature.

crates/signer/src/utils.rs

@@ -0,0 +1,33 @@
+use http::request;
+
+pub fn get_host_addr(req: &request::Builder) -> String {
+    let host = req.headers_ref().expect("err").get("host");
+    let uri = req.uri_ref().unwrap();
+    let req_host;
+    if let Some(port) = uri.port() {
+        req_host = format!("{}:{}", uri.host().unwrap(), port);
+    } else {
+        req_host = uri.host().unwrap().to_string();
+    }
+    if let Some(host) = host {
+        if req_host != *host.to_str().unwrap() {
+            return (*host.to_str().unwrap()).to_string();
+        }
+    }
+    /*if req.uri_ref().unwrap().host().is_some() {
+        return req.uri_ref().unwrap().host().unwrap();
+    }*/
+    req_host
+}
+
+pub fn sign_v4_trim_all(input: &str) -> String {
+    let ss = input.split_whitespace().collect::<Vec<_>>();
+    ss.join(" ")
+}
+
+pub fn stable_sort_by_first<T>(v: &mut [(T, T)])
+where
+    T: Ord,
+{
+    v.sort_by(|lhs, rhs| lhs.0.cmp(&rhs.0));
+}