proxy for api-tool

-Only for api_tool for now, if this solution works well then implementation for other tools is required
- Need to check api keys creation with the current proxies
- Show connection string example at creation
- locale needs updates for other languages

application/agents/tools/proxy_handler.py

@@ -0,0 +1,63 @@
+import logging
+import requests
+from typing import Dict, Optional
+from bson.objectid import ObjectId
+
+from application.core.mongo_db import MongoDB
+
+logger = logging.getLogger(__name__)
+
+# Get MongoDB connection
+mongo = MongoDB.get_client()
+db = mongo["docsgpt"]
+proxies_collection = db["proxies"]
+
+def get_proxy_config(proxy_id: str) -> Optional[Dict[str, str]]:
+    """
+    Retrieve proxy configuration from the database.
+    
+    Args:
+        proxy_id: The ID of the proxy configuration
+        
+    Returns:
+        A dictionary with proxy configuration or None if not found
+    """
+    if not proxy_id or proxy_id == "none":
+        return None
+        
+    try:
+        if ObjectId.is_valid(proxy_id):
+            proxy_config = proxies_collection.find_one({"_id": ObjectId(proxy_id)})
+            if proxy_config and "connection" in proxy_config:
+                connection_str = proxy_config["connection"].strip()
+                if connection_str:
+                    # Format proxy for requests library
+                    return {
+                        "http": connection_str,
+                        "https": connection_str
+                    }
+        return None
+    except Exception as e:
+        logger.error(f"Error retrieving proxy configuration: {e}")
+        return None
+
+def apply_proxy_to_request(request_func, proxy_id=None, **kwargs):
+    """
+    Apply proxy configuration to a requests function if available.
+    This is a minimal wrapper that doesn't change the function signature.
+    
+    Args:
+        request_func: The requests function to call (e.g., requests.get, requests.post)
+        proxy_id: Optional proxy ID to use
+        **kwargs: Arguments to pass to the request function
+    
+    Returns:
+        The response from the request
+    """
+    if proxy_id:
+        proxy_config = get_proxy_config(proxy_id)
+        if proxy_config:
+            kwargs['proxies'] = proxy_config
+            logger.info(f"Using proxy for request")
+    
+    return request_func(**kwargs)