Add additional PHP classes

Allow a local source

.github/FUNDING.yml

@@ -1,8 +1,2 @@
-# These are supported funding model platforms
-
 github: gnh1201
-open_collective: welsonjs
-liberapay: catswords
-custom: ['https://www.buymeacoffee.com/catswords', 'https://toss.me/catswords']
-patreon: catswords # Replace with a single Patreon username
-ko_fi: catswords
+custom: ['https://gnh1201.link']

.github/workflows/lint.yml

@@ -1,13 +0,0 @@
-name: Ruff
-on: [push, pull_request]
-
-concurrency:
-  group: ${{ github.workflow }}-${{ github.event_name == 'pull_request' && github.head_ref || github.ref }}
-  cancel-in-progress: true
-
-jobs:
-  ruff:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - uses: chartboost/ruff-action@v1

.github/workflows/llm-code-review.yml

@@ -0,0 +1,23 @@
+name: AI Code Review
+
+on:
+  pull_request:
+    types: [opened, synchronize, reopened]
+  issues:
+    types: [opened, reopened]
+
+jobs:
+  repofix:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Run RepoFixAI
+        uses: Manav916/llm-code-review@main
+        with:
+          groq_api_key: ${{ secrets.GROQ_API_KEY }}
+          groq_model: 'gemma-2-9b-it'
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          # exclude_extensions: 'txt'
+          repo_owner: ${{ github.repository_owner }}
+          repo_name: ${{ github.event.repository.name }}
+          event_number: ${{ github.event.number || github.event.issue.number }} # when listening for both pull requests and issues
+          event_name: ${{ github.event_name }}

README.md

@@ -1,20 +1,27 @@
-# gnh1201/caterpillar
+# Caterpillar Proxy (Songchoongi Project)
 
 [![FOSSA Status](https://app.fossa.com/api/projects/git%2Bgithub.com%2Fgnh1201%2Fcaterpillar.svg?type=shield)](https://app.fossa.com/projects/git%2Bgithub.com%2Fgnh1201%2Fcaterpillar?ref=badge_shield)
 [![DOI 10.5281/zenodo.13346533](https://zenodo.org/badge/DOI/10.5281/zenodo.13346533.svg)](https://doi.org/10.5281/zenodo.13346533)
+[![ChatGPT available](https://img.shields.io/badge/ChatGPT-74aa9c?logo=openai&logoColor=white)](#)
+[![slideshare.net available](https://img.shields.io/badge/SlideShare-black?logo=slideshare)](https://www.slideshare.net/slideshow/2024-caterpillar-project-in-2024-korea-oss-contest/273031732)
+[![Discord chat](https://img.shields.io/discord/359930650330923008?logo=discord)](https://discord.gg/9VVTHpfsVW)
+[![Open to work](https://img.shields.io/badge/%23-OPENTOWORK-green)](https://github.com/gnh1201/welsonjs/discussions/167)
 
-Caterpillar Proxy - The simple web debugging proxy (formerly, php-httpproxy)
+Caterpillar Proxy (Songchoongi Project) - The simple web debugging proxy (formerly, php-httpproxy)
 
-![Cover image - Caterpillar on a tree looking at a rocket flying over the clouds](assets/img/cover.png)
+![A cover image: Caterpillar on a tree looking at a rocket flying over the clouds](assets/img/cover.png)
 
 You can connect all physical and logical channels with communication capabilities to the web!
 
 Imagine various means such as time machines, satellites, quantum technology, sound, light, the Philosopher's Stone, or Excalibur, just like in science fiction movies! Caterpillar Proxy supports the implementation of extensions for Connectors, Filters, and RPC methods to bring your imagination to life.
 
+:rocket: [Open the Caterpillar Proxy Web Console](https://pub-1a7a176eea68479cb5423e44273657ad.r2.dev/console.html)
+
 ## Use cases
 * [Build a network tunnel using Python and the LAMP(PHP) stack (qiita.com)](https://qiita.com/gnh1201/items/40f9350ca6d308def6d4)
 * [K-Anonymity for Spam Filtering: Case with Mastodon, and Misskey (qiita.com)](https://qiita.com/gnh1201/items/09f4081f84610db3a9d3)
 * [File Upload Vulnerability Attack Test (Caterpillar Proxy) (youtu.be) ](https://youtu.be/sPZOCgYtLRw)
+* [Real-time processing of emergency disaster sensor data (e.g., fire detection).](https://catswords.social/@catswords_oss/114016647285923011)
 
 ## How it works
 
@@ -40,6 +47,7 @@ If you have a server that ***will be parasitized*** and you want to proxy it, yo
 
 ```
 [settings]
+CONNECTION_TIMEOUT=1
 PORT=5555
 SERVER_URL=localhost
 SERVER_CONNECTION_TYPE=
@@ -73,7 +81,7 @@ sudo update-ca-certificates
 4. (Optional) With [Cloudflare](https://cloudflare.com), we can expect to accelerate the 4x speed and reduce the network stuck.
 
 ## Extensions
-* [Web Console Available](https://pub-1a7a176eea68479cb5423e44273657ad.r2.dev/console.html)
+* [Web Console](https://pub-1a7a176eea68479cb5423e44273657ad.r2.dev/console.html)
 * Fediverse (e.g., Mastodon): See the [Fediverse (catswords-oss.rdbl.io)](https://catswords-oss.rdbl.io/1155378128/3821602484).
 * Wayback (Private browsing with Google or Wayback cache): See the [Wayback (catswords-oss.rdbl.io)](https://catswords-oss.rdbl.io/1155378128/6994492654)
 
@@ -90,11 +98,18 @@ sudo update-ca-certificates
 ![Roadmap image](assets/img/roadmap.png)
 
 ## Report abuse
-- [GitHub Security Advisories](https://github.com/gnh1201/caterpillar/security)
 - abuse@catswords.net
+- [GitHub Security Advisories (gnh1201/caterpillar)](https://github.com/gnh1201/caterpillar/security)
+
+## Join the community
 - ActivityPub [@catswords_oss@catswords.social](https://catswords.social/@catswords_oss)
-- XMPP [catswords@conference.xmpp.catswords.net](xmpp:catswords@conference.xmpp.catswords.net?join)
-- [Join Catswords on Microsoft Teams](https://teams.live.com/l/community/FEACHncAhq8ldnojAI)
+- XMPP [catswords@conference.omemo.id](xmpp:catswords@conference.omemo.id?join)
+- [Join Catswords OSS on Microsoft Teams (teams.live.com)](https://teams.live.com/l/community/FEACHncAhq8ldnojAI)
+- [Join Catswords OSS #caterpillar on Discord (discord.gg)](https://discord.gg/9VVTHpfsVW)
+
+## Special channels
+- [A paid consultation channel (m.expert.naver.com)](https://m.expert.naver.com/mobile/expert/product/detail?storeId=100051156&productId=100144540) is available for Korean (한국어) region.
+- [Join the private operations channel (forms.gle)](https://forms.gle/ZKAAaGTiGamksHoo8) is available for all regions.
 
 ## License
 [![FOSSA Status](https://app.fossa.com/api/projects/git%2Bgithub.com%2Fgnh1201%2Fcaterpillar.svg?type=large)](https://app.fossa.com/projects/git%2Bgithub.com%2Fgnh1201%2Fcaterpillar?ref=badge_large)

assets/php/class.tfa.php

@@ -0,0 +1,61 @@
+<?php
+// https://github.com/dimamedia/PHP-Simple-TOTP-and-PubKey
+
+class tfa {
+
+	// RFC4648 Base32 alphabet
+	private $alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ234567";
+
+	function getOtp($key) {
+
+		/* Base32 decoder */
+
+		// Remove spaces from the given public key and converting to an array
+		$key = str_split(str_replace(" ","",$key));
+		
+		$n = 0;
+		$j = 0;
+		$binary_key = "";
+
+		// Decode public key's each character to base32 and save into binary chunks
+		foreach($key as $char) {
+			$n = $n << 5;
+			$n = $n + stripos($this->alphabet, $char);
+			$j += 5;
+		
+			if($j >= 8) {
+				$j -= 8;
+				$binary_key .= chr(($n & (0xFF << $j)) >> $j);
+			}
+		}
+		/* End of Base32 decoder */
+
+		// current unix time 30sec period as binary
+		$binary_timestamp = pack('N*', 0) . pack('N*', floor(microtime(true)/30));
+		// generate keyed hash
+		$hash = hash_hmac('sha1', $binary_timestamp, $binary_key, true);
+		
+		// generate otp from hash
+		$offset = ord($hash[19]) & 0xf;
+		$otp = (
+			((ord($hash[$offset+0]) & 0x7f) << 24 ) |
+			((ord($hash[$offset+1]) & 0xff) << 16 ) |
+			((ord($hash[$offset+2]) & 0xff) << 8 ) |
+			(ord($hash[$offset+3]) & 0xff)
+		) % pow(10, 6);
+   
+	   return $otp;
+	}
+
+	function getPubKey() {
+		$alphabet = str_split($this->alphabet);
+		$key = '';
+		// generate 16 chars public key from Base32 alphabet
+		for ($i = 0; $i < 16; $i++) $key .= $alphabet[mt_rand(0,31)];
+		// split into 4x4 chunks for easy reading
+		return implode(" ", str_split($key, 4));
+	}
+
+}
+
+?>

assets/php/coupang.class.php

@@ -0,0 +1,70 @@
+<?php
+// coupang.class.php
+// Coupang Product Search API integration class
+// Namhyeon Go <gnh1201@gmail.com>
+// https://github.com/gnh1201/welsonjs
+// 
+date_default_timezone_set("GMT+0");
+
+class CoupangProductSearch {
+    private $accessKey = "";
+    private $secretKey = "";
+    private $baseUrl = "https://api-gateway.coupang.com";
+
+    private function generateSignature($method, $path, $query = "") {
+        $datetime = (new \DateTime("now", new \DateTimeZone("GMT")))->format("ymd\THis\Z");
+        $message = $datetime . $method . $path . $query;
+
+        $signature = hash_hmac('sha256', $message, $this->secretKey);
+        return [
+            'authorization' => "CEA algorithm=HmacSHA256, access-key={$this->accessKey}, signed-date={$datetime}, signature={$signature}",
+            'datetime' => $datetime
+        ];
+    }
+
+    public function searchProducts($keyword, $limit = 10, $subId = null, $imageSize = null, $srpLinkOnly = false) {
+        $path = "/v2/providers/affiliate_open_api/apis/openapi/products/search";
+        $queryParams = http_build_query([
+            'keyword' => $keyword,
+            'limit' => $limit,
+            'subId' => $subId,
+            'imageSize' => $imageSize,
+            'srpLinkOnly' => $srpLinkOnly
+        ]);
+        $fullPath = $path . '?' . $queryParams;
+        $url = $this->baseUrl . $fullPath;
+
+        $signatureData = $this->generateSignature("GET", $path, $queryParams);
+        $authorization = $signatureData['authorization'];
+        $datetime = $signatureData['datetime'];
+
+        $headers = [
+            "Content-Type: application/json;charset=UTF-8",
+            "Authorization: $authorization"
+        ];
+
+        $curl = curl_init();
+        curl_setopt($curl, CURLOPT_URL, $url);
+        curl_setopt($curl, CURLOPT_CUSTOMREQUEST, "GET");
+        curl_setopt($curl, CURLOPT_HTTPHEADER, $headers);
+        curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
+
+        $response = curl_exec($curl);
+        $httpCode = curl_getinfo($curl, CURLINFO_HTTP_CODE);
+
+        curl_close($curl);
+
+        if ($httpCode === 200) {
+            return json_decode($response, true);
+        } else {
+            try {
+                return json_decode($response, true);
+            } catch (Exception $e) {
+                return [
+                    "status" => $httpCode,
+                    "message" => $e->getMessage()
+                ];
+            }
+        }
+    }
+}

assets/php/index.php

@@ -1,37 +1,72 @@
 <?php
 /* index.php
- * Caterpillar Worker on PHP
+ * Caterpillar Proxy Worker on PHP runtime
  *
  * Caterpillar Proxy - The simple web debugging proxy (formerly, php-httpproxy)
  * Namhyeon Go (Catswords Research) <abuse@catswords.net>
  * https://github.com/gnh1201/caterpillar
  * Created at: 2022-10-06
- * Updated at: 2024-10-25
+ * Updated at: 2025-03-11
  */
-
-define("PHP_HTTPPROXY_VERSION", "0.1.6.2");
+define("PERF_START_TIME", microtime(true));
+define("PHP_HTTPPROXY_VERSION", "0.1.6.10");
 define("DEFAULT_SOCKET_TIMEOUT", 1);
 define("STATEFUL_SOCKET_TIMEOUT", 30);
 define("MAX_EXECUTION_TIME", 0);
-define("DEFAULT_USER_AGENT", $_SERVER['HTTP_USER_AGENT'] . '</p><hr><p>php-httpproxy/' . PHP_HTTPPROXY_VERSION . ' (Server; PHP ' . phpversion() . '; Caterpillar; abuse@catswords.net)');
+define("ALLOW_INVOKE_INSECURE_METHOD", false);
+define("ALLOW_LOAD_INSECURE_SCRIPT", true);
+define("DEFAULT_USER_AGENT", 'php-httpproxy/' . PHP_HTTPPROXY_VERSION . ' (Server; PHP ' . phpversion() . '; Caterpillar Proxy)');
+define("RELAY_ALLOW_METHODS", "");  // e.g., GET,POST
+define("RELAY_PROXY_PASS", "");  // e.g., https://example.org
+define("RELAY_IMAGE_FILE_EXTENSIONS", ".png,.gif,.jpg");
+define("RELAY_STATIC_FILE_EXTENSIONS", ".js,.css");
+define("RELAY_ENABLE_JS_REDIRECT", false);
+
+error_reporting(E_ALL);
+ini_set("display_errors", 0);
+ini_set("default_socket_timeout", DEFAULT_SOCKET_TIMEOUT);  // must be. because of `feof()` works
+ini_set("max_execution_time", MAX_EXECUTION_TIME);
 
 header('Access-Control-Allow-Origin: *');
 header('Access-Control-Allow-Methods: *');
 header("Access-Control-Allow-Headers: *");
 
-if (strpos($_SERVER['HTTP_USER_AGENT'], "php-httpproxy/") !== 0 && strpos($_SERVER['HTTP_X_USER_AGENT'], "php-httpproxy/") !== 0) {
-    exit('<!DOCTYPE html><html><head><title>It works!</title><meta charset="utf-8"></head><body><h1>It works!</h1><p><a href="https://github.com/gnh1201/caterpillar">Download the client</a></p><p>' . DEFAULT_USER_AGENT . '</p></body></html>');
+function get_current_execution_time() {
+    $end_time = microtime(true);
+    return $end_time - PERF_START_TIME;
 }
 
-ini_set("default_socket_timeout", DEFAULT_SOCKET_TIMEOUT);  // must be. because of `feof()` works
-ini_set("max_execution_time", MAX_EXECUTION_TIME);
+function array_get($key, $arr, $default = null) {
+    return array_key_exists($key, $arr) ? $arr[$key] : $default;
+}
+
+function server_env_get($key) {
+    return array_get($key, $_SERVER, "");
+}
+
+function verity_integrity($data, $integrity) {
+    if (strpos($integrity, 'sha384-') !== 0) {
+        return false;
+    }
+    
+    $encoded_hash = substr($integrity, 7);
+    $decoded_hash = base64_decode($encoded_hash);
+    $calculated_hash = hash('sha384', $data, true);
+    
+    return hash_equals($calculated_hash, $decoded_hash);
+}
+
+function cast_to_array($data) {
+    return is_array($data) ? $data : array($data);
+}
 
 function jsonrpc2_encode($method, $params, $id = '') {
     $data = array(
         "jsonrpc" => "2.0",
         "method" => $method,
         "params" => $params,
-        "id" => $id
+        "id" => $id,
+        "_execution_time" => get_current_execution_time()
     );
     return json_encode($data);
 }
@@ -40,7 +75,8 @@ function jsonrpc2_result_encode($result, $id = '') {
     $data = array(
         "jsonrpc" => "2.0",
         "result" => $result,
-        "id" => $id
+        "id" => $id,
+        "_execution_time" => get_current_execution_time()
     );
     return json_encode($data);
 }
@@ -49,7 +85,8 @@ function jsonrpc2_error_encode($error, $id = '') {
     $data = array(
         "jsonrpc" => "2.0",
         "error" => $error,
-        "id" => $id
+        "id" => $id,
+        "_execution_time" => get_current_execution_time()
     );
     return json_encode($data);
 }
@@ -71,7 +108,7 @@ function fatal_handler() {
         $errstr  = $error["message"];
 
         header("HTTP/1.1 200 OK");
-        exit(jsonrpc2_error_encode(array(
+        exit("\r\n\r\n" . jsonrpc2_error_encode(array(
             "status" => 503,
             "code" => $errno,
             "message"=> "Error occurred in file '$errfile' at line $errline: $errstr"
@@ -80,6 +117,27 @@ function fatal_handler() {
 }
 register_shutdown_function("fatal_handler");
 
+function load_script($data) {
+    $loaded_script = false;
+    
+    if (!ALLOW_LOAD_INSECURE_SCRIPT) {
+        return $loaded_script;
+    }
+
+    $fh = tmpfile();
+    if ($fh !== false) {
+        if (!(strpos($data, "<?") !== false)) {
+            $data = "<?php\r\n\r\n" . $data . "\r\n\r\n?>";
+        }
+        fwrite($fh, $data);
+        $path = stream_get_meta_data($fh)['uri'];
+        $loaded_script = include($path);
+        fclose($fh);
+    }
+
+    return $loaded_script;
+}
+
 // https://stackoverflow.com/questions/16934409/curl-as-proxy-deal-with-https-connect-method
 // https://stackoverflow.com/questions/12433958/how-to-parse-response-headers-in-php
 function parse_headers($str) { // Parses HTTP headers into an array
@@ -218,12 +276,12 @@ function relay_connect($params, $id = '') {
 }
 
 function relay_mysql_connect($params) {
-    $hostname = $params['hostname'];
-    $username = $params['username'];
-    $password = $params['password'];
-    $database = array_key_exists('database', $params) ? $params['database'] : null;
-    $port = array_key_exists('port', $params) ? intval($params['port']) : 3306;
-    $charset = array_key_exists('charset', $params) ? $params['charset'] : "utf8";
+    $hostname = array_get("hostname", $params, "localhost");
+    $username = array_get("username", $params, "root");
+    $password = array_get("password", $params, "");
+    $database = array_get("database", $params, null);
+    $port = intval(array_get("port", $params, 3306));
+    $charset = array_get("charset", $params, "utf8");
 
     try {
         $mysqli = new mysqli($hostname, $username, $password, $database, $port);
@@ -365,6 +423,24 @@ function relay_get_phpversion() {
     );
 }
 
+function relay_get_env_hash() {
+    $params = array(
+        "php_version" => phpversion(),
+        "php_os" => PHP_OS,
+        "php_sapi" => PHP_SAPI,
+        "loaded_extensions" => get_loaded_extensions(),
+        "ini_settings" => ini_get_all(null, false)
+    );
+    $serialized_params = serialize($params);
+
+    return array(
+        "data" => array(
+            sha1($serialized_params),
+            md5($serialized_params)
+        )
+    );
+}
+
 function relay_get_loaded_extensions() {
     return array(
         "data" => get_loaded_extensions()
@@ -397,15 +473,85 @@ function relay_dns_get_record($params) {
 
 function relay_fetch_url($params) {
     $url = $params['url'];
+    $method = array_get("method", $params, "GET");
+    $headers = array_get("headers", $params, array());
+    $data = array_get("data", $params, '');
+
+    // from local source
+    $local_prefix = "file:";
+    $pos = strpos($url, $local_prefix);
+    if ($pos !== false && $pos === 0) {
+        $path = realpath(substr($url, strlen($local_prefix)));
+        $basedir = realpath(__DIR__);
+        
+        if ($path && strpos($path, $basedir) === 0) {
+            if (file_exists($path)) {
+                $response = file_get_contents($path);
+                return array(
+                    "success" => true,
+                    "result" => array(
+                        "status" => 200,
+                        "data" => $response
+                    )
+                );
+            } else {
+                return array(
+                    "success" => false,
+                    "error" => array(
+                        "status" => 404,
+                        "code" => -1,
+                        "message" => "Not found"
+                    )
+                );
+            }
+        } else {
+            return array(
+                "success" => false,
+                "error" => array(
+                    "status" => 403,
+                    "code" => -1,
+                    "message" => "Access denied"
+                )
+            );
+        }
+    }
+
+    // from remote source
+    $_headers = array();
+    if (is_array($headers) && count($headers) > 0) {
+        foreach ($headers as $header_line) {
+            $pos = strpos($header_line, ':');
+            if ($pos !== false) {
+                $header_key = trim(substr($header_line, 0, $pos));
+                $header_value = trim(substr($header_line, $pos + 1));
+                $_header_line = sprintf("%s: %s", $header_key, $header_value);
+                array_push($_headers, $_header_line);
+            }
+        }
+    }
 
     try {
         $ch = curl_init();
         curl_setopt($ch, CURLOPT_URL, $url);
         curl_setopt($ch, CURLOPT_USERAGENT, DEFAULT_USER_AGENT);
         curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
-        curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 1);
+        curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 30);
         curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
+        curl_setopt($ch, CURLOPT_DNS_USE_GLOBAL_CACHE, false);
+        curl_setopt($ch, CURLOPT_DNS_CACHE_TIMEOUT, 30);
+        
+        // check the request headers
+        if (count($_headers) > 0) {
+            curl_setopt($ch, CURLOPT_HTTPHEADER, $_headers);
+        }
+        
+        // check it is POST request
+        if ($method == "POST") {
+            curl_setopt($ch, CURLOPT_POSTFIELDS, cast_to_array($data));
+            curl_setopt($ch, CURLOPT_POST, true);
+        }
 
+        // make cURL instance
         $response = curl_exec($ch);
         $error_code = curl_errno($ch);
         if ($error_code) {
@@ -459,10 +605,58 @@ function relay_get_geolocation() {
     }
 }
 
-
 function relay_invoke_method($params) {
     $callback = $params['callback'];
-    $args = (is_array($params['args']) ? $params['args'] : array());
+    $requires = cast_to_array($params['requires']);
+    $args = cast_to_array($params['args']);
+    
+    if (!ALLOW_INVOKE_INSECURE_METHOD) {
+        $allow_callbacks = array("phpinfo", "idn_to_ascii", "idn_to_utf8", "load_script");
+        if (!in_array($callback, $allow_callbacks)) {
+            return array(
+                "success" => false,
+                "error" => array(
+                    "status" => 403,
+                    "code" => -1,
+                    "message" => $callback . " is not allowed"
+                )
+            );
+        }
+    }
+    
+    foreach($requires as $require_ctx) {
+        $resource_url = "";
+        $resource_integrity = "";
+        
+        if (is_string($require_ctx)) {
+            $resource_url = $require_ctx;
+        } else if (is_array($require_ctx)) {
+            $resource_url = array_get("url", $require_ctx, "");
+            $resource_integrity = array_get("integrity", $require_ctx, "");
+        }
+        
+        if (empty($resource_url))
+            continue;
+        
+        try {
+            $result = relay_fetch_url(array(
+                "url" => $resource_url
+            ));
+
+            if ($result['success'] && $result['result']['status'] == 200) {
+                $response = $result['result']['data'];
+                if (!empty($resource_integrity)) {
+                    if (verify_integrity($response, $resource_integrity)) {
+                        load_script($response);
+                    }
+                } else {
+                    load_script($response);
+                }
+            }
+        } catch (Exception $e) {
+            //echo $e->message;    // ignore an exception
+        }
+    }
 
     try {
         $data = call_user_func_array($callback, $args);
@@ -489,21 +683,104 @@ function relay_invoke_method($params) {
     }
 }
 
-function get_client_address() {
-    $client_address = '';
-    if (!empty($_SERVER['HTTP_CLIENT_IP'])) {
-        $client_address = $_SERVER['HTTP_CLIENT_IP'];
-    } elseif (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) {
-        $client_address = $_SERVER['HTTP_X_FORWARDED_FOR'];
+function relay_web_search($params) {
+    $page = $params['page'];
+    $search_params = array(
+        "q" => $params['keyword'],
+        "p" => ($page > 0 ? $page - 1 : 0),
+        "t" => "0"  // text only
+    );
+    $result = relay_fetch_url(array(
+        "url" => "https://farside.link/librex/api.php?" . http_build_query($search_params)
+    ));
+    if ($result['success']) {
+        return array(
+            "success" => true,
+            "result" => array(
+                "status" => 200,
+                "data" => json_decode($result['result']['data'], true)
+            )
+        );
     } else {
-        $client_address = $_SERVER['REMOTE_ADDR'];
+        return $result;
     }
+}
+
+function get_client_address() {
+    $client_address = "";
+    
+    $client_address_candidates = array_filter(array_map("server_env_get", array(
+        "HTTP_CLIENT_IP",
+        "HTTP_X_FORWARDED_FOR",
+        "HTTP_X_FORWARDED",
+        "HTTP_X_CLUSTER_CLIENT_IP",
+        "HTTP_FORWARDED_FOR",
+        "HTTP_FORWARDED",
+        "REMOTE_ADDR"
+    )));
+    if (count($client_address_candidates) > 0) {
+        $client_address = $client_address_candidates[0];
+    }
+    
     return array(
-        "data" => $client_address,
+        "data" => $client_address_candidates,
         "client_address" => $client_address    // compatible under version 0.1.5.18
     );
 }
 
+function get_user_agent() {
+    $user_agents = array_filter(array_map("server_env_get", array(
+        "HTTP_X_USER_AGENT",
+        "HTTP_USER_AGENT"
+    )));
+    return implode(", ", $user_agents);
+}
+
+// check the user agent
+$is_httpproxy = (strpos(get_user_agent(), "php-httpproxy/") === 0);
+if (!$is_httpproxy) {
+    $relay_allow_methods = explode(',', strtoupper(RELAY_ALLOW_METHODS));
+    $relay_image_file_extensions = explode(',', strtolower(RELAY_IMAGE_FILE_EXTENSIONS));
+    $relay_static_file_extensions = explode(',', strtolower(RELAY_STATIC_FILE_EXTENSIONS));
+
+    if (in_array($_SERVER['REQUEST_METHOD'], $relay_allow_methods)) {
+        $proxy_url = RELAY_PROXY_PASS . $_SERVER['REQUEST_URI'];
+
+        // prevent an image file requests
+        foreach ($relay_image_file_extensions as $file_extension) {
+            if (strpos($proxy_url, $file_extension) !== false) {
+                header("Location: https://http.cat/images/200.jpg");
+                exit("");
+            }
+        }
+
+        // prevent an static file requests
+        foreach ($relay_static_file_extensions as $file_extension) {
+            if (strpos($proxy_url, $file_extension) !== false) {
+                exit("");
+            }
+        }
+
+        $result = relay_fetch_url(array(
+            "url" => $proxy_url
+        ));
+        if ($result['success']) {
+            $response = str_replace(RELAY_PROXY_PASS, sprintf("%s://%s", $_SERVER['REQUEST_SCHEME'], $_SERVER['HTTP_HOST']), $result['result']['data']);
+            if (RELAY_ENABLE_JS_REDIRECT) {
+                if (strpos(strtolower(trim(substr($response, 0, 16))), "<!doctype html") === 0) {
+                    $response .= "<script>setTimeout(function() { var a = document.createElement('a'); a.href = '" . $proxy_url . "'; document.body.appendChild(a); a.click(); }, 3000);</script>";
+                }
+            }
+            exit($response);
+        } else {
+            http_response_code(500);
+            exit($proxy_url . " is down.");
+        }
+    } else {
+        exit('<!DOCTYPE html><html><head><title>It works!</title><meta charset="utf-8"></head><body><h1>It works!</h1><p><a href="https://github.com/gnh1201/caterpillar">Download the client</a></p><p>' . $_SERVER['HTTP_USER_AGENT'] . '</p><hr><p>' . DEFAULT_USER_AGENT . '</p></body></html>');
+    }
+}
+
 // parse a context
 $context = json_decode(file_get_contents('php://input'), true);
 
@@ -551,6 +828,10 @@ if ($context['jsonrpc'] == "2.0") {
             echo jsonrpc2_result_encode(relay_get_phpversion(), $context['id']);
             break;
 
+        case "relay_get_env_hash":
+            echo jsonrpc2_result_encode(relay_get_env_hash(), $context['id']);
+            break;
+
         case "relay_get_loaded_extensions":
             echo jsonrpc2_result_encode(relay_get_loaded_extensions(), $context['id']);
             break;
@@ -591,6 +872,15 @@ if ($context['jsonrpc'] == "2.0") {
             }
             break;
 
+        case "relay_web_search":
+            $result = relay_web_search($context['params']);
+            if ($result['success']) {
+                echo jsonrpc2_result_encode($result['result'], $context['id']);
+            } else {
+                echo jsonrpc2_error_encode($result['error'], $context['id']);
+            }
+            break;
+
         case "get_client_address":
             echo jsonrpc2_result_encode(get_client_address(), $context['id']);
             break;

assets/php/punycode.class.php

@@ -0,0 +1,418 @@
+<?php
+/**
+ * The MIT License (MIT)
+ * 
+ * Copyright (c) 2013 mk-j, zedwood.com
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+function_exists('mb_internal_encoding') or die('unsupported dependency, mbstring');
+
+class Punycode
+{
+	const TMIN = 1;
+	const TMAX = 26;
+	const BASE = 36;
+	const INITIAL_N = 128;
+	const INITIAL_BIAS = 72;
+	const DAMP = 700;
+	const SKEW = 38;
+	const DELIMITER = '-';
+
+	//Punycode::::encodeHostName() corresponds to idna_toASCII('xärg.örg');
+	public static function encodeHostName($hostname)
+	{
+		if (!self::is_valid_utf8($hostname))
+		{
+			return $hostname;//invalid
+		}
+
+		if (function_exists('idn_to_ascii') && 0) 
+		{ 
+			return idn_to_ascii($hostname);//php 5.3+
+		}
+
+		$old_encoding = mb_internal_encoding();
+		mb_internal_encoding("UTF-8");
+
+		$pieces = explode(".", self::mb_strtolower($hostname) );
+		$punycode_pieces = array();
+		foreach($pieces as $piece)
+		{
+			if (preg_match("/[\x{80}-\x{FFFF}]/u", $piece))//is multi byte utf8
+			{
+				$punycode_pieces[] = "xn--".self::encode($piece);
+			}
+			else if (preg_match('/^[a-z\d][a-z\d-]{0,62}$/i', $piece) && !preg_match('/-$/', $piece) )//is valid ascii hostname
+			{
+				$punycode_pieces[] = $piece;
+			}
+			else
+			{
+				mb_internal_encoding($old_encoding);
+				return $hostname;//invalid domain
+			}
+		}
+		mb_internal_encoding($old_encoding);
+		return implode(".", $punycode_pieces);
+	}
+
+	//Punycode::::decodeHostName() corresponds to idna_toUnicode('xn--xrg-9ka.xn--rg-eka');
+	public static function decodeHostName($encoded_hostname)
+	{
+		if (!preg_match('/[a-z\d.-]{1,255}/', $encoded_hostname))
+		{
+			return false;
+		}
+
+		if (function_exists('idn_to_utf8') && 0) 
+		{ 
+			return idn_to_utf8($encoded_hostname); 
+		}
+
+		$old_encoding = mb_internal_encoding();
+		mb_internal_encoding("UTF-8");
+
+		$pieces = explode(".", strtolower($encoded_hostname));
+		foreach($pieces as $piece)
+		{
+			if (!preg_match('/^[a-z\d][a-z\d-]{0,62}$/i', $piece) || preg_match('/-$/', $piece) )
+			{
+				mb_internal_encoding($old_encoding);
+				return $encoded_hostname;//invalid 
+			}
+			$punycode_pieces[] = strpos($piece, "xn--")===0 ? self::decode(substr($piece,4)) : $piece;
+		}
+		mb_internal_encoding($old_encoding);
+		return implode(".", $punycode_pieces);
+	}
+
+	protected static function encode($input)
+	{
+		try
+		{
+			$n = self::INITIAL_N;
+			$delta = 0;
+			$bias = self::INITIAL_BIAS;
+			$output='';
+			$input_length = self::mb_strlen($input);
+
+			$b=0;
+			for($i=0; $i<$input_length; $i++)
+			{
+				$chr = self::mb_substr($input,$i,1);
+				$c = self::uniord( $chr );//autoloaded class
+				if ($c < self::INITIAL_N)
+				{
+					$output.= $chr;
+					$b++;
+				}
+			}
+			
+			if ($b==$input_length)//no international chars to convert to punycode here
+			{
+				throw new Exception("PunycodeException.BAD_INPUT");
+			}
+			else if ($b>0)
+			{
+				$output.= self::DELIMITER;
+			}
+
+			$h = $b;
+			while($h < $input_length)
+			{
+				$m = PHP_INT_MAX;
+
+				// Find the minimum code point >= n
+				for($i=0; $i<$input_length; $i++)
+				{
+					$chr = self::mb_substr($input,$i,1);
+					$c = self::uniord( $chr );
+					if ($c >= $n && $c < $m)
+					{
+						$m = $c;
+					}
+				}
+				
+				
+				if (($m - $n) > (PHP_INT_MAX - $delta) / ($h+1))
+				{
+					throw new Exception("PunycodeException.OVERFLOW");
+				}
+				$delta = $delta + ($m - $n) * ($h + 1);
+				$n = $m;
+				
+
+				for($j=0; $j<$input_length; $j++)
+				{
+					$chr = self::mb_substr($input,$j,1);
+					$c = self::uniord( $chr );
+					if ($c < $n)
+					{
+						$delta++;
+						if (0==$delta)
+						{
+							throw new Exception("PunycodeException.OVERFLOW");
+						}
+					}
+					
+					if ($c == $n)
+					{
+						$q = $delta;
+						for($k= self::BASE;; $k+=self::BASE)
+						{
+							$t=0;
+							if ($k <= $bias)
+							{
+								$t= self::TMIN;
+							} else if ($k >= $bias + self::TMAX) { 
+								$t= self::TMAX;
+							} else {
+								$t = $k - $bias;
+							}
+							if ($q < $t)
+							{
+								break;
+							}
+							$output.= chr( self::digit2codepoint($t + ($q - $t) % (self::BASE - $t)) );
+							$q = floor(  ($q-$t) / (self::BASE - $t) );//integer division
+						}
+						$output.= chr( self::digit2codepoint($q) );
+						$bias = self::adapt($delta, $h+1, $h==$b);
+						$delta=0;
+						$h++;
+					}
+				}
+				$delta++;
+				$n++;
+			}
+		}
+		catch (Exception $e)
+		{
+			error_log("[PUNYCODE] error ".$e->getMessage());
+			return $input;
+		}
+		return $output;
+	}
+
+	protected static function decode($input)
+	{
+		try
+		{
+			$n = self::INITIAL_N;
+			$i = 0;
+			$bias = self::INITIAL_BIAS;
+			$output = '';
+
+			$d = self::rstrpos($input, self::DELIMITER);
+			if ($d>0) {
+				for($j=0; $j<$d; $j++) {
+					$chr = self::mb_substr($input,$j,1);
+					$c = self::uniord( $chr );
+					if ($c>=self::INITIAL_N) {
+						throw new Exception("PunycodeException.BAD_INPUT");
+					}
+					$output.=$chr;
+				}
+				$d++;
+			} else {
+				$d = 0;
+			}
+
+			$input_length = self::mb_strlen($input);
+			while ($d < $input_length) {
+				$oldi = $i;
+				$w = 1;
+
+				for($k= self::BASE;; $k += self::BASE) {
+					if ($d == $input_length) {
+						throw new Exception("PunycodeException.BAD_INPUT");
+					}
+					$chr = self::mb_substr($input,$d++,1);
+					$c = self::uniord( $chr );
+					$digit = self::codepoint2digit($c);
+					if ($digit > (PHP_INT_MAX - $i) / $w) {
+						throw new Exception("PunycodeException.OVERFLOW");
+					}
+
+					$i = $i + $digit * $w;
+
+					$t=0;
+					if ($k <= $bias) {
+						$t = self::TMIN;
+					} else if ($k >= $bias + self::TMAX) {
+						$t = self::TMAX;
+					} else {
+						$t = $k - $bias;
+					}
+					if ($digit < $t) {
+						break;
+					}
+					$w = $w * (self::BASE - $t);
+				}
+				$output_length = self::mb_strlen($output);
+
+				$bias = self::adapt($i - $oldi, $output_length + 1, $oldi == 0);
+
+				if ($i / ($output_length + 1) > PHP_INT_MAX - $n) {
+					throw new Exception("PunycodeException.OVERFLOW");
+				}
+				$n = floor($n + $i / ($output_length + 1));
+				$i = $i % ($output_length + 1);
+				$output = self::mb_strinsert($output, self::utf8($n), $i);
+				$i++;
+			}
+		}
+		catch(Exception $e)
+		{
+			error_log("[PUNYCODE] error ".$e->getMessage());
+			return $input;
+		}
+		return $output;
+	}
+
+//adapt patched from:
+//https://github.com/takezoh/php-PunycodeEncoder/blob/master/punycode.php
+	protected static function adapt($delta, $numpoints, $firsttime)
+	{
+		$delta = (int)($firsttime ? $delta / self::DAMP : $delta / 2);
+		$delta += (int)($delta / $numpoints);
+		$k = 0;
+		while ($delta > (((self::BASE - self::TMIN) * self::TMAX) / 2)) {
+			$delta = (int)($delta / (self::BASE - self::TMIN));
+			$k += self::BASE;
+		}
+		return $k + (int)((self::BASE - self::TMIN + 1) * $delta / ($delta + self::SKEW));
+	}
+
+	protected static function digit2codepoint($d)
+	{
+		if ($d < 26) {
+			// 0..25 : 'a'..'z'
+			return $d + ord('a');
+		} else if ($d < 36) {
+			// 26..35 : '0'..'9';
+			return $d - 26 + ord('0');
+		} else {
+			throw new Exception("PunycodeException.BAD_INPUT");
+		}
+	}
+
+	protected static function codepoint2digit($c)
+	{
+		if ($c - ord('0') < 10) {
+			// '0'..'9' : 26..35
+			return $c - ord('0') + 26;
+		} else if ($c - ord('a') < 26) {
+			// 'a'..'z' : 0..25
+			return $c - ord('a');
+		} else {
+			throw new Exception("PunycodeException.BAD_INPUT");
+		}
+	}
+
+	protected static function rstrpos($haystack, $needle)
+	{
+		$pos = strpos (strrev($haystack), $needle);
+		if ($pos === false)
+			return false;
+		return strlen ($haystack)-1 - $pos;
+	}
+
+	protected static function mb_strinsert($haystack, $needle, $position)
+	{
+		$old_encoding = mb_internal_encoding();
+		mb_internal_encoding("UTF-8");
+		$r = mb_substr($haystack,0,$position).$needle.mb_substr($haystack,$position);
+		mb_internal_encoding($old_encoding);
+		return $r;
+	}
+	
+	protected static function mb_substr($str,$start,$length)
+	{
+		$old_encoding = mb_internal_encoding();
+		mb_internal_encoding("UTF-8");
+		$r = mb_substr($str,$start,$length);
+		mb_internal_encoding($old_encoding);
+		return $r;
+	}
+
+	protected static function mb_strlen($str)
+	{
+		$old_encoding = mb_internal_encoding();
+		mb_internal_encoding("UTF-8");
+		$r = mb_strlen($str);
+		mb_internal_encoding($old_encoding);
+		return $r;
+	}
+
+	protected static function mb_strtolower($str)
+	{
+		$old_encoding = mb_internal_encoding();
+		mb_internal_encoding("UTF-8");
+		$r = mb_strtolower($str);
+		mb_internal_encoding($old_encoding);
+		return $r;
+	}
+	
+	public static function uniord($c)//cousin of ord() but for unicode
+	{
+		$ord0 = ord($c[0]); if ($ord0>=0   && $ord0<=127) return $ord0;
+		$ord1 = ord($c[1]); if ($ord0>=192 && $ord0<=223) return ($ord0-192)*64 + ($ord1-128);
+		if ($ord0==0xed && ($ord1 & 0xa0) == 0xa0) return false; //code points, 0xd800 to 0xdfff
+		$ord2 = ord($c[2]); if ($ord0>=224 && $ord0<=239) return ($ord0-224)*4096 + ($ord1-128)*64 + ($ord2-128);
+		$ord3 = ord($c[3]); if ($ord0>=240 && $ord0<=247) return ($ord0-240)*262144 + ($ord1-128)*4096 + ($ord2-128)*64 + ($ord3-128);
+		return false;
+	}
+
+	public static function utf8($num)//cousin of ascii() but for utf8
+	{
+		if($num<=0x7F)       return chr($num);
+		if($num<=0x7FF)      return chr(($num>>6)+192).chr(($num&63)+128);
+		if(0xd800<=$num && $num<=0xdfff) return '';//invalid block of utf8
+		if($num<=0xFFFF)     return chr(($num>>12)+224).chr((($num>>6)&63)+128).chr(($num&63)+128);
+		if($num<=0x10FFFF)   return chr(($num>>18)+240).chr((($num>>12)&63)+128).chr((($num>>6)&63)+128).chr(($num&63)+128);
+		return '';
+	}
+	
+	public static function is_valid_utf8($string)
+	{
+		for ($i=0, $ix=strlen($string); $i < $ix; $i++)
+		{
+			$c = ord($string[$i]);
+			if ($c==0x09 || $c==0x0a || $c==0x0d || (0x20 <= $c && $c < 0x7e) ) $n = 0; # 0bbbbbbb
+			else if (($c & 0xE0) == 0xC0) $n=1; # 110bbbbb
+			else if ($c==0xed && (ord($string[$i+1]) & 0xa0)==0xa0) return false; //code points, 0xd800 to 0xdfff
+			else if (($c & 0xF0) == 0xE0) $n=2; # 1110bbbb
+			else if (($c & 0xF8) == 0xF0) $n=3; # 11110bbb
+			//else if (($c & 0xFC) == 0xF8) $n=4; # 111110bb //byte 5, unnecessary in 4 byte UTF-8
+			//else if (($c & 0xFE) == 0xFC) $n=5; # 1111110b //byte 6, unnecessary in 4 byte UTF-8
+			else return false;
+			for ($j=0; $j<$n; $j++) { // n bytes matching 10bbbbbb follow ?
+				if ((++$i == $ix) || ((ord($string[$i]) & 0xC0) != 0x80))
+					return false;
+			}
+		}
+		return true;
+	}
+
+}
+
+

base.py

@@ -8,7 +8,7 @@
 # Euiseo Cha (Wonkwang University) <zeroday0619_dev@outlook.com>
 # https://github.com/gnh1201/caterpillar
 # Created at: 2024-05-20
-# Updated at: 2024-10-08
+# Updated at: 2024-11-14
 #
 import logging
 import hashlib
@@ -198,6 +198,22 @@ class Extension:
                 return extension
         return None
 
+    @classmethod
+    def test_connectors(cls, data):
+        def test(preludes, data):
+            for prelude in preludes:
+                if data.find(prelude) == 0:
+                    return True
+            return False
+        
+        for extension in cls.extensions:
+            if (
+                extension.type == "connector"
+                and test(extension.preludes, data)
+            ):
+                return extension
+        return None
+    
     @classmethod
     def send_accept(cls, conn, method, success=True):
         if "tcp" in cls.protocols:

console.html

@@ -1,51 +1,70 @@
 <!doctype html>
 <html>
     <head>
-        <title>Caterpillar Proxy Web Console</title>
+        <title>Caterpillar Proxy Console</title>
         <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
-        <meta http-equiv="Content-Security-Policy" content="upgrade-insecure-requests">
+        <!--<meta http-equiv="Content-Security-Policy" content="upgrade-insecure-requests">-->
         <meta name="referrer" content="unsafe-url">
-        <link href="https://cdnjs.cloudflare.com/ajax/libs/jquery.terminal/2.42.0/css/jquery.terminal.min.css" rel="stylesheet" type="text/css">
-        <link href="https://unpkg.com/leaflet@1.9.4/dist/leaflet.css" rel="stylesheet" type="text/css">
+        <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/jquery.terminal/2.44.1/css/jquery.terminal.min.css">
+        <link rel="stylesheet" href="https://unpkg.com/leaflet@1.9.4/dist/leaflet.css">
         <style type="text/css">/*<!--<![CDATA[*/
-            body {
+            html, body, main {
+                width: 100%;
+                height: 100%;
+                padding: 0;
+                margin: 0;
+            }
+            
+            #content {
+                float: right;
+                width: 80%;
+                height: 100%;
+                scroll: hidden;
+            }
+            
+            #cover {
+                float: left;
+                width: 20%;
+                height: 100%;
+                scroll: hidden;
+                
                 background: #2e8d36 url(https://pub-1a7a176eea68479cb5423e44273657ad.r2.dev/bg.jpg) no-repeat;
                 background-size: cover;
                 background-position: center;
             }
-            h1, p {
-                color: #093923;
+            
+            #cover article {
+                margin: 30px;
             }
-            p a {
-                color: #fff;
-                padding: 0 2px;
-                text-decoration: none;
-                border-bottom: 2px solid #fff;
-            }
-            main {
-                width: 640px;
-                margin: 0 auto;
-            }
-            .terminal, .cmd {
-                background: #093923;
+            
+            #console {
+                height: 100%; 
             }
         /*]]>-->*/</style>
     </head>
     <body>
         <main>
-            <h1>Caterpillar Proxy Web Console</h1>
-            <p>Download an worker script of <a href="https://github.com/gnh1201/caterpillar">Caterpillar Proxy</a>.</p>
-            <div id="console"></div>
-            <div id="map"></div>
-            <p><a href="https://github.com/gnh1201/caterpillar">Fork me. gnh1201/caterpillar (GitHub)</a></p>
+            <section id="content">
+                <div id="console"></div>
+                <div id="map"></div>
+                <div id="embed"></div>
+            </section>
+            <section id="cover">
+                <article>
+                    <h1>Caterpillar Proxy Console</h1>
+                    <p>Source code available</p>
+                    <p><a href="https://github.com/gnh1201/caterpillar">gnh1201/caterpillar (GitHub)</a></p>
+                    <p><a href="https://github.com/gnh1201/caterpillar-plugins">gnh1201/caterpillar-plugins (GitHub)</a></p>
+                </article>
+            </section>
         </main>
 
-        <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.7.1/jquery.min.js" type="text/javascript"></script>
-        <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery.terminal/2.42.0/js/jquery.terminal.min.js" type="text/javascript" ></script>
-        <script src="https://unpkg.com/leaflet@1.9.4/dist/leaflet.js" type="text/javascript"></script>
+        <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.7.1/jquery.min.js"></script>
+        <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery.terminal/2.44.1/js/jquery.terminal.min.js"></script>
+        <script src="https://unpkg.com/leaflet@1.9.4/dist/leaflet.js"></script>
         <script type="text/javascript">//<!--<![CDATA[
             var env = {
-                "target": "http://localhost/",
+                "target": "https://azure-ashlan-40.tiiny.io/",
                 "method": "",
                 "filename": null
             };
@@ -67,7 +86,27 @@
                 document.body.appendChild(element);
                 element.click();
                 document.body.removeChild(element);
-            }
+            };
+            var show_embed = function(term, url) {
+                term.echo('', {
+                    finalize: function($div) {
+                        var $embed = $("#embed");
+                        $embed.html($("<iframe/>").attr({
+                            "title": "embed web page",
+                            "src": url,
+                            "allow": "accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share",
+                            "referrerpolicy": "unsafe-url",
+                            "allowfullscreen": true
+                        }).css({
+                            "width": "100%",
+                            "height": "240px",
+                            "border": "none"
+                        }));
+                        $div.children().last().append($embed);
+                        term.echo();
+                    }
+                });
+            };
             var jsonrpc2_request = function(term, method, params) {
                 var requestData = {
                     jsonrpc: "2.0",
@@ -95,7 +134,12 @@
                             // for dirty response (e.g., magic header, advertise logo)
                             try {
                                 var start = s.indexOf('{');
-                                var end = s.lastIndexOf('}');
+                                var end = [s.indexOf("}\r\n\r\n"), s.lastIndexOf('}')].reduce(function(a, x) {
+                                    if (x > 0 && a > x) {
+                                        a = x;  // set new value if x greater than 0 and x less than previous value
+                                    }
+                                    return a;
+                                }, s.length);
                                 if (start > -1 && end > -1 && end > start) {
                                     responseData = JSON.parse(s.substring(start, end + 1));
                                 } else {
@@ -129,7 +173,6 @@
                                 text = responseData.result.data;
                             }
                         }
-                        term.echo(text);
 
                         // save as a file
                         if (env.filename != null) {
@@ -138,11 +181,14 @@
                         
                         // method(relay_get_geolocation)
                         if (env.method == "relay_get_geolocation") {
-                            var geodata = responseData.result.data;
-
+                            term.echo(text);
                             term.echo('', {
                                 finalize: function($div) {
-                                    $div.children().last().append($("#map").css("height", "130px"));
+                                    var geodata = responseData.result.data;
+                                    var $map = $("#map").css({
+                                        "height": "240px"
+                                    });
+                                    $div.children().last().append($map);
                                     map.setView([geodata.lat, geodata.lon], 13);
                                     var circle = L.circle([geodata.lat, geodata.lon], {
                                         color: 'red',
@@ -153,7 +199,45 @@
                                     term.echo();
                                 }
                             });
+                            return;
                         }
+                        
+                        // method(relay_web_search)
+                        if (env.method == "relay_web_search") {
+                            var searchdata = responseData.result.data;
+                            
+                            if ("error" in searchdata) {
+                                term.echo(searchdata.error.message);
+                                term.echo('');
+                                return;
+                            }
+
+                            var results = Object.values(searchdata);
+                            if (results.length > 0) {
+                                results.forEach(function(x) {
+                                    if (typeof x !== "object") return;
+
+                                    if ("special_response" in x) {
+                                        term.echo("< " + x.special_response.response);
+                                        term.echo("< " + x.special_response.source);
+                                        term.echo('');
+                                    } else {
+                                        var base_domain = (function(s) {
+                                            return s.split("/")[2];
+                                        })(x.base_url);
+                                        term.echo("< [[!;;;;" + x.url + ";{}]" + x.title.trim() + " (" + base_domain + ")]: " + x.description.trim());
+                                    }
+                                });
+                            } else {
+                                term.echo("No any results");
+                            }
+                            
+                            term.echo('');
+                            return;
+                        }
+                        
+                        // print a response
+                        term.echo(text);
                     },
                     error: function(xhr, status, error) {
                         term.echo(error);
@@ -163,16 +247,40 @@
 
             jQuery(function($, undefined) {
                 $('#console').terminal({
-                    set: function(k, v) {
+                    set: function(...args) {
+                        var k = (args.length > 0 ? args[0] : '');
+                        var v = (args.length > 1 ? args.slice(1) : []).join(' ');
+
+                        // "env" is the reserved word
                         if (k == "env") {
                             this.echo("env is the reserved word");
                             return;
                         }
+                        
+                        // check a variable is it Array
+                        if (k in env && env[k] instanceof Array) {
+                            env[k].push(v);
+                            return;
+                        }
+                        
+                        // method(relay_web_search)
+                        if (env.method == "relay_web_search" && k == "page") {
+                            env[k] = parseInt(v);
+                            return;
+                        }
+                        
 
                         env[k] = v || null;
 
                         if (k == "method") {
                             this.set_prompt('method([[b;red;black]' + env.method + '])> ');
+                            
+                            // method(relay_invoke_method)
+                            if (env.method == "relay_invoke_method") {
+                                set_default_env({
+                                    "requires": []
+                                });
+                            }
 
                             // method(relay_sendmail)
                             if (env.method == "relay_sendmail") {
@@ -194,6 +302,14 @@
                                     "mysql_charset": "utf8"
                                 });
                             }
+                            
+                            // method(relay_web_search)
+                            if (env.method == "relay_web_search") {
+                                set_default_env({
+                                    "keyword": "",
+                                    "page": 1
+                                });
+                            }
                         }
                     },
                     show: function(k) {
@@ -222,6 +338,7 @@
 
                             jsonrpc2_request(this, env.method, {
                                 "callback": args[0],
+                                "requires": env.requires,
                                 "args": args.slice(1)
                             });
                             return;
@@ -237,7 +354,6 @@
                             jsonrpc2_request(this, env.method, {
                                 "hostname": args[0]
                             });
-                            
                             return;
                         }
                         
@@ -251,7 +367,6 @@
                             jsonrpc2_request(this, env.method, {
                                 "url": args[0]
                             });
-                            
                             return;
                         }
                         
@@ -334,13 +449,62 @@
                             });
                             return;
                         }
+                        
+                        // method(relay_web_search)
+                        if (env.method == "relay_web_search") {
+                            jsonrpc2_request(this, env.method, {
+                                "keyword": env.keyword,
+                                "page": env.page,
+                                "type": "text"
+                            });
+                            return;
+                        }
 
                         // method(*)
                         jsonrpc2_request(this, env.method, {});
-                    }
+                    },
+                    show_embed: function(url) {
+                        show_embed(this, url); 
+                    },
+                    youtube: function(...args) {
+                        if (args.length < 1) {
+                            this.echo("Please let me know what do you want to do.");
+                        }
+
+                        var action = args[0];
+                        switch (action) {
+                            case "play":
+                                if (args.length < 2) {
+                                    this.echo("Please let me know the video ID");
+                                }
+                                var video_id = args[1];
+                                show_embed(this, "https://www.youtube.com/embed/" + video_id);
+                                break;
+                        }
+                    },
+                    search: function(...args) {
+                        this.exec("set method relay_web_search");
+                        this.exec("set page 1");
+                        this.exec("set keyword " + args.join(' '));
+                        this.exec("do");
+                    },
+                    next: function() {
+                        if (env.method == "relay_web_search") {
+                            var num = parseInt(env.page) + 1;
+                            this.exec("set page " + num);
+                            this.exec("do");
+                        }
+                    },
+                    prev: function() {
+                        if (env.method == "relay_web_search") {
+                            var num = (env.page > 1 ? env.page - 1 : 1);
+                            this.exec("set page " + num);
+                            this.exec("do");
+                        }
+                    },
                 }, {
-                    height: 480,
-                    width: 640,
+                    height: "100%",
+                    width: "100%",
                     prompt: '> ',
                     checkArity: false
                 });

server.py

@@ -7,13 +7,14 @@
 # Namyheon Go (Catswords Research) <gnh1201@gmail.com>
 # https://github.com/gnh1201/caterpillar
 # Created at: 2022-10-06
-# Updated at: 2024-10-09
+# Updated at: 2025-02-17
 #
 
 import argparse
 import socket
 import sys
 import os
+import re
 from _thread import *
 from subprocess import PIPE, Popen
 import base64
@@ -39,7 +40,7 @@ from base import (
     Logger,
 )
 
-logger = Logger(name="server", level=logging.WARNING)
+logger = Logger(name="server", level=logging.DEBUG)
 
 # initialization
 try:
@@ -47,6 +48,7 @@ try:
     _username, _password, server_url = extract_credentials(
         config("SERVER_URL", default="")
     )
+    connection_timeout = config("CONNECTION_TIMEOUT", default=5, cast=int)
     server_connection_type = config("SERVER_CONNECTION_TYPE", default="proxy")
     ca_key = config("CA_KEY", default="ca.key")
     ca_cert = config("CA_CERT", default="ca.crt")
@@ -138,11 +140,22 @@ def conn_string(conn: socket.socket, data: bytes, addr: bytes):
             return True
         return False
 
+    # debugging
+    logger.debug("@ " + ("%s:%s" % addr))
+    logger.debug("> " + data.hex(' '))
+
     # JSON-RPC 2.0 request over Socket (stateful)
     if data.find(b"{") == 0 and process_jsonrpc2(data):
         # will be close by the client
         return
 
+    # Check a preludes in connectors
+    connector = Extension.test_connectors(data)
+    if connector:
+        logger.info("[*] Connecting...")
+        connector.connect(conn, data, b'', b'', b'', b'', b'')
+        return
+
     # parse first data (header)
     webserver, port, scheme, method, url = parse_first_data(data)
 
@@ -159,11 +172,17 @@ def conn_string(conn: socket.socket, data: bytes, addr: bytes):
     local_domains = list(filter(None, map(str.strip, local_domain.split(','))))
     for domain in local_domains:
         localserver = domain.encode(client_encoding)
-        if webserver == localserver or data.find(b"\nHost: " + localserver) > -1:
-            logger.info("[*] Detected the reverse proxy request: %s" % local_domain)
+
+        # Resolve a cache mismatch issue when making requests to a local domain.
+        header_end = data.find(b"\r\n\r\n")
+        header_section_data = data[:header_end] if header_end > -1 else b''
+        header_host_pattern = re.compile(rb"\n\s*host\s*:\s*" + re.escape(localserver), re.IGNORECASE)
+        if webserver == localserver or header_host_pattern.search(header_section_data):
+            logger.info("[*] Reverse proxy requested: %s" % local_domain)
             scheme, _webserver, _port = proxy_pass.encode(client_encoding).split(b":")
             webserver = _webserver[2:]
             port = int(_port.decode(client_encoding))
+            method = b"CONNECT" if scheme == b"https" else method   # proxy pass on HTTPS
             break
 
     proxy_server(webserver, port, scheme, method, url, conn, addr, data)
@@ -327,7 +346,7 @@ def proxy_server(
 
             # send following chunks
             buffered = b""
-            conn.settimeout(1)
+            conn.settimeout(connection_timeout)
             while True:
                 try:
                     chunk = conn.recv(buffer_size)
@@ -444,6 +463,8 @@ def proxy_server(
 
         # stateful mode
         elif server_connection_type == "stateful":
+            client_address = str(addr[0])
+
             proxy_data = {
                 "headers": {
                     "User-Agent": "php-httpproxy/0.1.5 (Client; Python "
@@ -452,7 +473,7 @@ def proxy_server(
                 },
                 "data": {
                     "buffer_size": str(buffer_size),
-                    "client_address": str(addr[0]),
+                    "client_address": client_address,
                     "client_port": str(listening_port),
                     "client_encoding": client_encoding,
                     "remote_address": webserver.decode(client_encoding),
@@ -463,7 +484,7 @@ def proxy_server(
             }
 
             # get client address
-            logger.info("[*] resolving the client address...")
+            logger.info("[*] Resolving the client address...")
             while len(resolved_address_list) == 0:
                 try:
                     _, query_data = jsonrpc2_encode("get_client_address")
@@ -476,11 +497,23 @@ def proxy_server(
                     )
                     if query.status_code == 200:
                         result = query.json()["result"]
-                        resolved_address_list.append(result["data"])
-                    logger.info("[*] resolved IP: %s" % (result["data"]))
+                        
+                        if isinstance(result["data"], str):
+                            client_address = result["data"]
+                            resolved_address_list.append(client_address)
+                        elif isinstance(result["data"], list):
+                            client_address = result["data"][0]
+                            resolved_address_list.append(client_address)
+                        else:
+                            logger.warn("[*] Failed to resolve a client address. Retrying...")
+                    else:
+                        logger.warn("[*] Failed to resolve a client address. Retrying...")
                 except requests.exceptions.ReadTimeout:
-                    pass
-            proxy_data["data"]["client_address"] = resolved_address_list[0]
+                    logger.warn("[*] Failed to resolve a client address. Retrying...")
+
+            # update the client address
+            logger.info("[*] Use the client address: %s" % (client_address))
+            proxy_data["data"]["client_address"] = client_address
 
             # build a tunnel
             def relay_connect(id, raw_data, proxy_data):
@@ -607,13 +640,13 @@ def proxy_server(
                 logger.info("[*] Connecting...")
                 connector.connect(conn, data, webserver, port, scheme, method, url)
             else:
-                raise Exception("Unsupported connection type")
+                raise Exception("[*] The request from " + ("%s:%s" % addr) + " is ignored due to an undefined connector type.")
 
         logger.info("[*] Request and received. Done. %s" % (str(addr[0])))
         conn.close()
     except Exception as e:
         print(traceback.format_exc())
-        logger.error("[*] Exception on requesting the data.", exc_info=e)
+        logger.warning("[*] Ignored the request.", exc_info=e)
         conn.sendall(b'HTTP/1.1 403 Forbidden\r\n\r\n{"status":403}')
         conn.close()
 
@@ -634,25 +667,37 @@ def add_filtered_host(domain: str, ip_address: str):
 def start():  # Main Program
     try:
         sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
-
+        sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
         sock.bind(("", listening_port))
         sock.listen(max_connection)
         logger.warning("[*] Server started successfully [ %d ]" % listening_port)
     except Exception as e:
         logger.error("[*] Unable to Initialize Socket", exc_info=e)
         sys.exit(2)
+        
+    def recv(conn):
+        conn.settimeout(connection_timeout)
+        
+        try:
+            data = conn.recv(buffer_size)
+            if not data:
+                data = b''
+        except socket.timeout:
+            logger.warning(f"No data received from " + ("%s:%s" % addr) + ". Attempting to request data.")
+            data = b''
+        
+        return data
 
     while True:
         try:
             conn, addr = sock.accept()  # Accept connection from client browser
-            data = conn.recv(buffer_size)  # Recieve client data
+            data = recv(conn)  # Recieve client data
             start_new_thread(conn_string, (conn, data, addr))  # Starting a thread
         except KeyboardInterrupt:
             sock.close()
             logger.info("[*] Graceful Shutdown")
             sys.exit(1)
 
-
 if __name__ == "__main__":
     # Fix Value error
     if use_extensions: