Fix header name range validation

async-nats/src/header.rs

@@ -499,7 +499,7 @@ impl FromStr for HeaderName {
  type Err = ParseHeaderNameError;
 
  fn from_str(s: &str) -> Result<Self, Self::Err> {
- if s.contains(|c: char| !c.is_ascii_alphanumeric() && c != '-') {
+ if s.contains(|c: char| c == ':' || (c as u8) < 33 || (c as u8) > 126) {
  return Err(ParseHeaderNameError);
  }
 
@@ -637,6 +637,18 @@ mod tests {
  );
  }
 
+ #[test]
+ fn dollar_header_name() {
+ let valid_header_name = "$X_Custom_Header";
+ let parsed_header = HeaderName::from_str(valid_header_name);
+
+ assert!(
+ parsed_header.is_ok(),
+ "Expected Ok(HeaderName), but got an error: {:?}",
+ parsed_header.err()
+ );
+ }
+
  #[test]
  fn invalid_header_name_with_space() {
  let invalid_header_name = "X Custom Header";
@@ -651,7 +663,7 @@ mod tests {
 
  #[test]
  fn invalid_header_name_with_special_chars() {
- let invalid_header_name = "X-Header!@#";
+ let invalid_header_name = "X-Header:";
  let parsed_header = HeaderName::from_str(invalid_header_name);
 
  assert!(