Make guard struct field private

README.md

@@ -73,7 +73,7 @@ to use it in [templates](https://rocket.rs/v0.4/guide/responses/#templates):
 ```rust
 #[get("/comments/new")]
 fn new(csrf_token: CsrfToken) -> Template {
-    let authenticity_token: String = csrf_token.0;
+    let authenticity_token: &str = csrf_token.authenticity_token();
 
     // your code
 }

examples/minimal/src/main.rs

@@ -36,7 +36,7 @@ fn index() -> Redirect {
 #[get("/comments/new")]
 fn new(csrf_token: CsrfToken, flash: Option<FlashMessage>) -> Template {
     let template_context = TemplateContext {
-        authenticity_token: csrf_token.0,
+        authenticity_token: csrf_token.authenticity_token().to_string(),
         flash: flash.map(|msg| format!("{}! {}", msg.name(), msg.msg())),
     };
 

src/lib.rs

@@ -13,7 +13,7 @@ const RAW_TOKEN_LENGTH: usize = 32;
 
 pub struct Fairing;
 
-pub struct CsrfToken(pub String);
+pub struct CsrfToken(String);
 
 pub struct VerificationFailure;
 
@@ -24,6 +24,10 @@ impl Fairing {
 }
 
 impl CsrfToken {
+    pub fn authenticity_token(&self) -> &str {
+        self.0.as_ref()
+    }
+
     pub fn verify(&self, form_authenticity_token: &str)
         -> Result<(), VerificationFailure>
     {

tests/guard.rs

@@ -18,7 +18,7 @@ fn rocket() -> rocket::Rocket {
 
 #[get("/")]
 fn index(csrf_token: CsrfToken) -> String {
-    csrf_token.0
+    csrf_token.authenticity_token().to_string()
 }
 
 #[test]