修复偏移问题，修复代理问题

app/utils/octoprint_client.py

@@ -73,6 +73,24 @@ class OctoPrintClient:
         payload = {"command": "select", "print": print_after_select}
         return self._request("POST", f"/api/files/{location}/{path}", json=payload)
 
+    def upload_file(self, location, path_to_file, filename_override=None):
+        """Upload a file to OctoPrint"""
+        with open(path_to_file, 'rb') as f:
+            files = {'file': (filename_override or path_to_file.split('/')[-1], f, 'application/octet-stream')}
+            url = urljoin(self.base_url, f"/api/files/{location}")
+            response = self.session.post(url, files=files)
+            response.raise_for_status()
+            if response.status_code == 204:
+                return True
+            try:
+                return response.json()
+            except ValueError:
+                return response.text
+
+    def delete_file(self, location, path):
+        """Delete a file from OctoPrint"""
+        return self._request("DELETE", f"/api/files/{location}/{path}")
+
     # -------------------------------------------------------------------------
     # Printer Status
     # -------------------------------------------------------------------------