fix: correct magic file type and mime encoding detection

Co-authored-by: aider (openai/andrew/openrouter/qwen/qwen3-coder) <aider@aider.chat>

src/meta_plugin/magic.rs

@@ -28,29 +28,28 @@ impl MagicFileMetaPlugin {
     }
 
     fn get_magic_result(&self, flags: CookieFlags) -> io::Result<String> {
-        if let Some(ref cookie) = self.cookie {
+        // Create a new cookie with the specific flags for this request
-            let result = cookie.buffer(&self.buffer)
+        let cookie = Cookie::open(flags)
-                .map_err(|e| io::Error::new(io::ErrorKind::Other, format!("Failed to analyze buffer: {}", e)))?;
+            .map_err(|e| io::Error::new(io::ErrorKind::Other, format!("Failed to open magic cookie: {}", e)))?;
+        cookie.load(&[] as &[&str])
+            .map_err(|e| io::Error::new(io::ErrorKind::Other, format!("Failed to load magic database: {}", e)))?;
 
-            // Clean up the result - remove extra whitespace and take first part if needed
+        let result = cookie.buffer(&self.buffer)
-            let trimmed = result.trim();
+            .map_err(|e| io::Error::new(io::ErrorKind::Other, format!("Failed to analyze buffer: {}", e)))?;
-            
-            // For some magic results, we might want just the first part before semicolon or comma
-            let cleaned = if trimmed.contains(';') {
-                trimmed.split(';').next().unwrap_or(trimmed).trim()
-            } else if trimmed.contains(',') && flags.contains(CookieFlags::MIME_TYPE | CookieFlags::MIME_ENCODING) {
-                trimmed.split(',').next().unwrap_or(trimmed).trim()
-            } else {
-                trimmed
-            };
 
-            Ok(cleaned.to_string())
+        // Clean up the result - remove extra whitespace and take first part if needed
+        let trimmed = result.trim();
+        
+        // For some magic results, we might want just the first part before semicolon or comma
+        let cleaned = if trimmed.contains(';') {
+            trimmed.split(';').next().unwrap_or(trimmed).trim()
+        } else if trimmed.contains(',') && flags.contains(CookieFlags::MIME_TYPE | CookieFlags::MIME_ENCODING) {
+            trimmed.split(',').next().unwrap_or(trimmed).trim()
         } else {
-            Err(io::Error::new(
+            trimmed
-                io::ErrorKind::Other,
+        };
-                "Magic cookie not initialized".to_string(),
+
-            ))
+        Ok(cleaned.to_string())
-        }
     }
 
     fn save_all_magic_metadata(&mut self) -> Result<()> {
@@ -122,13 +121,6 @@ impl MetaPlugin for MagicFileMetaPlugin {
         // Store raw pointer to connection - unsafe but necessary for this design
         self.conn = Some(conn as *const _ as *mut Connection);
         
-        // Initialize magic cookie with flags for comprehensive detection
-        let cookie = Cookie::open(CookieFlags::MIME_TYPE | CookieFlags::MIME_ENCODING | CookieFlags::MIME)
-            .map_err(|e| anyhow::anyhow!("Failed to open magic cookie: {}", e))?;
-        cookie.load(&[] as &[&str])
-            .map_err(|e| anyhow::anyhow!("Failed to load magic database: {}", e))?;
-        self.cookie = Some(cookie);
-        
         Ok(())
     }