**Feat: Verbessert Token-Handling und String-Sanitization**

- Leere/Whitespace-Tokens werden konsistent als `None` behandelt
- Sanitization für Anführungszeichen (`"` und `'`) und Umgebungsvariablen
- Getter-Methode für GitHub-Token hinzugefügt

src/config.rs

@@ -1,6 +1,6 @@
+use crate::utils::sanitize_string;
 use serde::{Deserialize, Serialize};
 use std::path::PathBuf;
-use crate::utils::sanitize_env_vars;
 
 fn default_true() -> bool {
     true
@@ -110,20 +110,32 @@ pub fn get_config_file_path() -> PathBuf {
 /// Lädt die Anwendungskonfiguration. Verwendet Standardwerte, falls keine Datei vorhanden ist.
 pub fn load_config() -> AppConfig {
     let mut config = config_ctdra::load_config::<AppConfig>();
-    let mut env_vars = std::env::vars().collect();
-    sanitize_env_vars(&mut env_vars);
-    if let Some(gitea_url) = env_vars.get("GITEA_URL") {
-        config.gitea_url = Some(gitea_url.clone());
+
+    if let Ok(val) = std::env::var("GITEA_URL") {
+        let val = sanitize_string(&val);
+        if !val.is_empty() {
+            config.gitea_url = Some(val);
+        }
     }
-    if let Some(gitea_token) = env_vars.get("GITEA_TOKEN") {
-        config.gitea_token = Some(gitea_token.clone());
+    if let Ok(val) = std::env::var("GITEA_TOKEN") {
+        let val = sanitize_string(&val);
+        if !val.is_empty() {
+            config.gitea_token = Some(val);
+        }
     }
-    if let Some(registry_owner) = env_vars.get("REGISTRY_OWNER") {
-        config.registry_owner = Some(registry_owner.clone());
+    if let Ok(val) = std::env::var("REGISTRY_OWNER") {
+        let val = sanitize_string(&val);
+        if !val.is_empty() {
+            config.registry_owner = Some(val);
+        }
     }
-    if let Some(github_token) = env_vars.get("GITHUB_TOKEN") {
-        config.github_token = Some(github_token.clone());
+    if let Ok(val) = std::env::var("GITHUB_TOKEN") {
+        let val = sanitize_string(&val);
+        if !val.is_empty() {
+            config.github_token = Some(val);
+        }
     }
+
     config
 }
 

src/github.rs

@@ -81,12 +81,13 @@ struct GhApiAsset {
 #[derive(Clone, Debug)]
 pub struct GitHubClient {
     client: reqwest::Client,
-    pub token: Option<String>,
+    token: Option<String>,
 }
 
 impl GitHubClient {
     /// Erstellt einen neuen GitHub-API-Client mit optionalem Authentifizierungstoken.
     pub fn new(token: Option<String>) -> Result<Self> {
+        let token = token.filter(|t| !t.trim().is_empty());
         let mut headers = reqwest::header::HeaderMap::new();
         headers.insert(
             reqwest::header::USER_AGENT,
@@ -105,6 +106,11 @@ impl GitHubClient {
         Ok(Self { client, token })
     }
 
+    /// Gibt das optionale Authentifizierungstoken zurück (falls gesetzt).
+    pub fn token(&self) -> Option<&str> {
+        self.token.as_deref()
+    }
+
 
     /// Ruft Releases für ein angegebenes Repository ab (Format "owner/repo").
     ///
@@ -130,9 +136,7 @@ impl GitHubClient {
 
             let mut req = self.client.get(&url);
             if let Some(token) = &self.token {
-                if !token.is_empty() {
-                    req = req.bearer_auth(token);
-                }
+                req = req.bearer_auth(token);
             }
 
             let resp = req.send().await.with_context(|| format!("Failed to send request to {}", url))?;
@@ -220,9 +224,7 @@ impl GitHubClient {
     pub async fn download_asset_stream(&self, download_url: &str) -> Result<reqwest::Response> {
         let mut req = self.client.get(download_url);
         if let Some(token) = &self.token {
-            if !token.is_empty() {
-                req = req.bearer_auth(token);
-            }
+            req = req.bearer_auth(token);
         }
 
         let resp = req

src/utils.rs

@@ -10,10 +10,10 @@
 /// The sanitized string with surrounding quotes removed.
 pub fn sanitize_string(input: &str) -> String {
     let trimmed = input.trim();
-    if trimmed.starts_with('"') && trimmed.ends_with('"') {
-        trimmed[1..trimmed.len() - 1].to_string()
-    } else if trimmed.starts_with('') && trimmed.ends_with('') {
-        trimmed[1..trimmed.len() - 1].to_string()
+    if let Some(stripped) = trimmed.strip_prefix('"').and_then(|s| s.strip_suffix('"')) {
+        stripped.to_string()
+    } else if let Some(stripped) = trimmed.strip_prefix('\'').and_then(|s| s.strip_suffix('\'')) {
+        stripped.to_string()
     } else {
         trimmed.to_string()
     }

tests/config_tests.rs

@@ -1,4 +1,4 @@
-use mirror_package::config::{load_config, AppConfig, RepoConfig};
+use mirror_package::config::{AppConfig, RepoConfig, load_config};
 use mirror_package::utils::{sanitize_env_vars, sanitize_string};
 use std::collections::HashMap;
 
@@ -41,12 +41,28 @@ fn test_load_config_with_env_vars() {
 #[test]
 fn test_sanitize_string() {
     assert_eq!(sanitize_string("\"https://gitea.example.com\""), "https://gitea.example.com");
+    assert_eq!(sanitize_string("'https://gitea.example.com'"), "https://gitea.example.com");
     assert_eq!(sanitize_string("\"token123\""), "token123");
+    assert_eq!(sanitize_string("'token123'"), "token123");
     assert_eq!(sanitize_string("\"owner\""), "owner");
+    assert_eq!(sanitize_string("'owner'"), "owner");
     assert_eq!(sanitize_string("\"github_token123\""), "github_token123");
+    assert_eq!(sanitize_string("'github_token123'"), "github_token123");
     assert_eq!(sanitize_string("no_quotes"), "no_quotes");
     assert_eq!(sanitize_string("\"single_quote\""), "single_quote");
+    assert_eq!(sanitize_string("'single_quote'"), "single_quote");
     assert_eq!(sanitize_string("\"escaped_quote\""), "escaped_quote");
+    // Edge cases: single character inputs
+    assert_eq!(sanitize_string("\""), "\"");
+    assert_eq!(sanitize_string("'"), "'");
+    assert_eq!(sanitize_string("a"), "a");
+    // Edge cases: empty quotes and empty strings
+    assert_eq!(sanitize_string("\"\""), "");
+    assert_eq!(sanitize_string("''"), "");
+    assert_eq!(sanitize_string(""), "");
+    assert_eq!(sanitize_string("   "), "");
+    assert_eq!(sanitize_string("  'hello'  "), "hello");
+    assert_eq!(sanitize_string("  \"world\"  "), "world");
 }
 
 #[test]

tests/github_tests.rs

@@ -73,17 +73,18 @@ fn test_parse_repo_owner_name() {
 async fn test_github_client_empty_token() {
     use mirror_package::github::GitHubClient;
 
-    // Test that a client with an empty token can be created
+    // Test that a client with an empty or whitespace token sanitizes it to None
     let client = GitHubClient::new(Some("".to_string())).expect("Failed to create client with empty token");
+    assert_eq!(client.token(), None);
 
-    // The client should be created successfully but has_auth() should return false
-    assert!(client.token.is_none() || client.token.as_ref().map_or(true, |t| t.is_empty()));
+    let client_whitespace = GitHubClient::new(Some("   ".to_string())).expect("Failed to create client with whitespace token");
+    assert_eq!(client_whitespace.token(), None);
 
     // Test with a valid token
     let client_with_token = GitHubClient::new(Some("valid_token".to_string())).expect("Failed to create client with valid token");
-    assert!(client_with_token.token.as_ref().map_or(false, |t| !t.is_empty()));
+    assert_eq!(client_with_token.token(), Some("valid_token"));
 
     // Test with no token
     let client_no_token = GitHubClient::new(None).expect("Failed to create client with no token");
-    assert!(client_no_token.token.is_none());
+    assert_eq!(client_no_token.token(), None);
 }