Update gptchat.php

Author: VolkanSah

gptchat.php

@@ -1,62 +1,42 @@
 <?php
-// Set the content type of the response to JSON
-header('Content-Type: application/json');
-
-// Allow cross-origin requests from any domain
+header('Content-Type: text/event-stream');
+header('Cache-Control: no-cache');
 header('Access-Control-Allow-Origin: *');
-
-// Allow the POST method for cross-origin requests
 header('Access-Control-Allow-Methods: POST');
-
-// Specify allowed headers for cross-origin requests, including Content-Type and Authorization
 header('Access-Control-Allow-Headers: Content-Type, Authorization');
 
-// Include the configuration file
 require_once 'config.php';
 
-// Check if the request method is POST
 if ($_SERVER['REQUEST_METHOD'] === 'POST') {
-    
-    // Decode the JSON input and store it in a variable
     $input = json_decode(file_get_contents('php://input'), true);
-    
-    // URL-encode the message from the input
-    $message = urlencode($input['message']);
-    
-    // Initialize a new cURL session
+    $message = $input['message'];
 
     $ch = curl_init();
-// Change the API endpoint URL according to your needs
-// For example, use /v1/chat/completions for GPT-4, GPT-4-0314, GPT-4-32k, GPT-4-32k-0314, GPT-3.5-turbo, and GPT-3.5-turbo-0301 models
-// Use /v1/completions for Lingua models like text-davinci-003, text-davinci-002, text-curie-001, text-babbage-001, and text-ada-001
-// See the readme.md file for more information
-// if you dont want to use /v1/engines/ than you must remove model from CURLOPT_URL and must set it in CURLOPT_POSTFIELDS like "model" => gpt-3.5-turbo-16k,
-    curl_setopt($ch, CURLOPT_URL, "https://api.openai.com/v1/engines/" . MODEL . "/completions");
-    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
-    curl_setopt($ch, CURLOPT_POST, 1);
-    curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode(array(
-
-        "prompt" => $message,
-        "max_tokens" => MAX_TOKENS,
-        "temperature" => TEMPERATURE,
-        "top_p" => TOP_P,
-        "frequency_penalty" => FREQUENCY_PENALTY,
-        "presence_penalty" => PRESENCE_PENALTY
-    )));
-    // Set the Content-Type and Authorization headers
-    curl_setopt($ch, CURLOPT_HTTPHEADER, array(
+    curl_setopt($ch, CURLOPT_URL, "https://api.openai.com/v1/chat/completions");
+    curl_setopt($ch, CURLOPT_RETURNTRANSFER, false);
+    curl_setopt($ch, CURLOPT_POST, true);
+    curl_setopt($ch, CURLOPT_HTTPHEADER, [
         "Content-Type: application/json",
         "Authorization: Bearer " . OPENAI_API_KEY
-    ));
-// Execute the cURL session and store the response
-    $response = curl_exec($ch);
-    // Output the response
-    echo $response;
-// Close the cURL session
+    ]);
+    curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode([
+        "model" => MODEL,
+        "messages" => [["role" => "user", "content" => $message]],
+        "temperature" => TEMPERATURE,
+        "max_tokens" => MAX_TOKENS,
+        "stream" => true
+    ]));
+
+    curl_setopt($ch, CURLOPT_WRITEFUNCTION, function ($curl, $data) {
+        echo "data: " . $data . "\n\n";
+        ob_flush();
+        flush();
+        return strlen($data);
+    });
+
+    curl_exec($ch);
     curl_close($ch);
 } else {
-     // Set the HTTP response code to 405 (Method Not Allowed) if the request method is not POST
     http_response_code(405);
-    // Output an error message in JSON format
     echo json_encode(['error' => 'Method not allowed']);
 }