Improve GET /chat params parsing and logging

Add debug logging for incoming GET requests (query, body, headers) and broaden parameter support by merging req.query and req.body. Support multiple input names (message, content, text, prompt, q) and handle messages as either JSON strings or already-parsed arrays. Return a more informative 400 error including received debug info when required params are missing. Also add 'nul' to .gitignore.

Author: foxy1402

.gitignore

@@ -10,3 +10,4 @@ Thumbs.db
 
 # Testing artifacts
 cookies.txt
+nul

src/routes/chat.js

@@ -25,15 +25,31 @@ const setSSEHeaders = (res) => {
 
 // Smart routing - support GET requests for better client compatibility
 router.get('/', (req, res) => {
-  // Extract parameters from query string
-  const { message, messages, model = 'auto', stream = false, temperature, max_tokens } = req.query;
+  // Debug: Log what we're actually receiving
+  console.log('[GET /chat/completions] Query params:', req.query);
+  console.log('[GET /chat/completions] Body:', req.body);
+  console.log('[GET /chat/completions] Headers:', req.headers);
+  
+  // Extract parameters from query string, body, or headers
+  const { message, messages, model = 'auto', stream = false, temperature, max_tokens, content, text, prompt } = { 
+    ...req.query, 
+    ...req.body 
+  };
 
   let parsedMessages;
 
-  if (messages) {
-    // Try to parse messages from query parameter (JSON string)
+  // Try multiple parameter names that different bots might use
+  const userInput = message || content || text || prompt || req.query.q || req.body.content;
+  const messageArray = messages || req.body.messages;
+  
+  if (messageArray) {
+    // Try to parse messages from parameter (JSON string or already parsed)
     try {
-      parsedMessages = JSON.parse(decodeURIComponent(messages));
+      if (typeof messageArray === 'string') {
+        parsedMessages = JSON.parse(decodeURIComponent(messageArray));
+      } else {
+        parsedMessages = messageArray;
+      }
     } catch (e) {
       return res.status(400).json({
         error: {
@@ -42,15 +58,21 @@ router.get('/', (req, res) => {
         }
       });
     }
-  } else if (message) {
-    // Simple single message support
-    parsedMessages = [{ role: 'user', content: decodeURIComponent(message) }];
+  } else if (userInput) {
+    // Simple single message support with various parameter names
+    parsedMessages = [{ role: 'user', content: decodeURIComponent(userInput.toString()) }];
   } else {
+    // If no recognized parameters, provide helpful debug info
     return res.status(400).json({
       error: {
         message: 'Missing required parameter. Use ?message=your_text or ?messages=[{"role":"user","content":"text"}]',
         type: 'invalid_request_error',
-        help: 'GET Example: /v1/chat/completions?message=Hello&model=auto'
+        help: 'GET Example: /v1/chat/completions?message=Hello&model=auto',
+        debug: {
+          receivedQuery: req.query,
+          receivedBody: req.body,
+          supportedParams: ['message', 'content', 'text', 'prompt', 'messages']
+        }
       }
     });
   }