Create openai_chat_api.php

openai_chat_api.php

@@ -0,0 +1,205 @@
+<?php
+/*
+  https://github.com/alexz006/ChatGPT-Example
+*/
+
+set_time_limit(120);
+
+define('OPENAI_API_KEY', ''); // https://platform.openai.com/account/api-keys
+
+define('COOKIE_PUID', '_puid=user-...'); // cookie: _puid=user-...
+
+define('ACCESS_TOKEN', ''); // https://chat.openai.com/api/auth/session
+
+if($_SERVER['REQUEST_METHOD'] == "POST"){
+  $arr = json_decode(file_get_contents('php://input'), true);
+  if(!empty($arr['message'])){
+    $openai = [];
+    header('Content-Type: application/json');
+    if($arr['openai_type'] == 'chat'){
+        $arr['conversation_id'] = $arr['conversation_id'] ?? '';
+        $arr['parent_message_id'] = $arr['parent_message_id'] ?? uuid4();
+        $openai = openai_chat($arr);
+    }
+    else
+      $openai = openai_api($arr['message']);
+
+    if(!empty($openai['message']))
+      $openai["message"] = replace_html(trim($openai["message"]));
+
+    die(json_encode($openai));
+  }
+}
+
+function openai_chat($arr){
+
+  $url = 'https://chat.openai.com/backend-api/conversation';
+
+  $data = [
+    "action" => "next",
+    "messages" => [
+      [
+        "content" => [
+          "content_type" => "text",
+          "parts" => [$arr['message']]
+        ],
+        "id" => uuid4(),
+        "role" => "user"
+      ]
+    ],
+    "model" => "text-davinci-002-render-sha", // sha - default, paid - legacy
+    "parent_message_id" => $arr['parent_message_id']
+  ];
+
+  if(!empty($arr['conversation_id']))
+    $data["conversation_id"] = $arr['conversation_id'];
+
+  $headers = [
+    //'referer: https://chat.openai.com/chat' .($arr['conversation_id']?'/'.$arr['conversation_id']:''),
+    'cookie: ' . COOKIE_PUID,
+    'user-agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 Safari/537.36',
+    'Content-Type: application/json',
+    'Authorization: Bearer ' . ACCESS_TOKEN
+  ];
+
+  $ch = curl_init();
+  curl_setopt($ch, CURLOPT_URL, $url);
+  curl_setopt($ch, CURLOPT_POST, true);
+  curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($data));
+  curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
+  curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
+  $response = curl_exec($ch);
+  if (curl_errno($ch))
+    return ["error" => ["msg"=>curl_error($ch)]];
+  curl_close($ch);
+
+  $expl = explode("\n", $response);
+  $last_line = '';
+  foreach ($expl as $line) {
+    if($line === "" || $line === null)
+      continue;
+    if(strpos($line, "data: ") !== false)
+      $line = substr($line, 6);
+    if($line === "[DONE]")
+      break;
+    $last_line = $line;
+  }
+
+  if($last_line){
+    $decoded_line = json_decode($last_line, true);
+    if (json_last_error() !== JSON_ERROR_NONE)
+      return ["error" => ["msg"=>$last_line]];
+
+    if(!empty($decoded_line["detail"]))
+      return ["error" => (
+        is_array($decoded_line["detail"])?
+          (!empty($decoded_line["detail"]["message"])?
+      ["msg"=>$decoded_line["detail"]["message"]]:
+      $decoded_line["detail"][0]):
+          ["msg"=>$decoded_line["detail"]]
+      )];
+
+    $message = $decoded_line["message"]["content"]["parts"][0];
+    $conversation_id = $decoded_line["conversation_id"];
+    $parent_message_id = $decoded_line["message"]["id"];
+    return [
+      "message" => $message,
+      "conversation_id" => $conversation_id,
+      "parent_message_id" => $parent_message_id,
+    ];
+  }
+  return ["error" => ["msg"=>"unknown"]];
+}
+
+function openai_api($message){
+
+  $url = 'https://api.openai.com/v1/engines/text-davinci-003/completions';
+  $headers = [
+    'Content-Type: application/json',
+    'Authorization: Bearer ' . OPENAI_API_KEY
+  ];
+  $data = [
+    "prompt" => $message,
+    'max_tokens' => 300,
+    "temperature" => 0.9,
+  ];
+
+  $ch = curl_init();
+  curl_setopt($ch, CURLOPT_URL, $url);
+  curl_setopt($ch, CURLOPT_POST, true);
+  curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($data));
+  curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
+  curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
+  $response  = curl_exec($ch);
+  if (curl_errno($ch)) {
+    $return = [
+      'error' => ['msg'=>'<span style="color:red">' . curl_error($ch) . '</span>']
+    ];
+    curl_close($ch);
+    return $return;
+  }
+  curl_close($ch);
+  $arr = json_decode($response, 1);
+
+  $return = [
+    'message' => ''
+  ];
+  if(!empty($arr['error'])){
+    $return['error'] = ['msg'=>'<span style="color:red">' . $arr['error']['message'] . '</span>'];
+  }
+  elseif(!empty($arr['choices'])){
+    $return['message'] = trim($arr['choices'][0]['text']);
+  }
+  return $return;
+}
+
+/*--------------------*/
+
+// get uuid4
+function uuid4() {
+  $data = openssl_random_pseudo_bytes(16);
+  $data[6] = chr(ord($data[6]) & 0x0f | 0x40);
+  $data[8] = chr(ord($data[8]) & 0x3f | 0x80);
+  return vsprintf('%s%s-%s-%s-%s-%s%s%s', str_split(bin2hex($data), 4));
+}
+
+// replace_html
+function replace_html($string) {
+
+  // find_markdown
+  preg_match_all('/(?:```|`)(.*?)(?:```|`)/s', $string, $find_markdown);
+  foreach($find_markdown[1] as $i=>$find){
+    $string = preg_replace('~'.preg_quote($find).'~', "-find_markdown{$i}-", $string, 1);
+  }
+
+  if(empty($find_markdown[1])){
+
+    // find_php
+    preg_match_all('/(<\?(?:[^\s\n]*)?[\s\n]+.*?\?>)/s', $string, $find_php);
+    foreach($find_php[1] as $i=>$find){
+      $string = preg_replace('~'.preg_quote($find).'~', "-find_php{$i}-", $string, 1);
+	}
+
+    // htmlspecialchars other code
+    $string = htmlspecialchars($string, ENT_QUOTES, 'UTF-8');
+    $string = nl2br($string);
+
+    // return find_php and highlight_string
+    preg_match_all('/(-find_php[0-9]+?-)/s', $string, $m);
+    foreach($m[1] as $i=>$find){
+      $find_php[1][$i] = highlight_string($find_php[1][$i], true);
+      $string = preg_replace('~'.preg_quote($find).'~', $find_php[1][$i], $string, 1);
+    }
+
+  }
+  else {
+
+    // return find_markdown
+    preg_match_all('~(?:```|`)(-find_markdown[0-9]+?-)(?:```|`)~s', $string, $m);
+    foreach($m[1] as $i=>$find){
+      $string = preg_replace('~'.preg_quote($find).'~', $find_markdown[1][$i], $string, 1);
+	}
+
+  }
+  return $string;
+}