dont rewrite cookie

Author: Ximik

client/src/config.rs

@@ -149,22 +149,33 @@ impl Args {
                 args.rpc_password.as_ref().unwrap(),
             )
         } else {
-            let cookie = format!(
-                "__cookie__:{}",
-                thread_rng()
-                    .sample_iter(&Alphanumeric)
-                    .take(64)
-                    .map(char::from)
-                    .collect::<String>()
-            );
             let cookie_path = data_dir.join(".cookie");
-            fs::write(&cookie_path, &cookie).map_err(|e| {
-                anyhow!(
-                    "Failed to write cookie file '{}': {}",
-                    cookie_path.display(),
-                    e
-                )
-            })?;
+            let cookie = if cookie_path.exists() {
+                fs::read_to_string(&cookie_path).map_err(|e| {
+                    anyhow!(
+                        "Failed to read cookie file '{}': {}",
+                        cookie_path.display(),
+                        e
+                    )
+                })?
+            } else {
+                let cookie = format!(
+                    "__cookie__:{}",
+                    thread_rng()
+                        .sample_iter(&Alphanumeric)
+                        .take(64)
+                        .map(char::from)
+                        .collect::<String>()
+                );
+                fs::write(&cookie_path, &cookie).map_err(|e| {
+                    anyhow!(
+                        "Failed to write cookie file '{}': {}",
+                        cookie_path.display(),
+                        e
+                    )
+                })?;
+                cookie
+            };
             auth_token_from_cookie(&cookie)
         };