Used Moodle's "curl" wrapper class instead of direct curl call.

https://transfer.hft-stuttgart.de/gitlab/ulrike.pado/asyst-moodle-plugin/-/issues/2

classes/api/client.php

@@ -29,7 +29,6 @@ namespace local_asystgrade\api;
 
 use Exception;
 use local_asystgrade\api\http_client_interface;
-use local_asystgrade\api\http_client_interface;
 
 /**
  * Client class for handling HTTP requests to Flask ML backend.
@@ -39,8 +38,10 @@ use local_asystgrade\api\http_client_interface;
  * @package   local_asystgrade
  */
 class client {
+
+
     /** @var ?client This variable holds an object type for http_client */
-    private static ?client        $instance = null;
+    private static ?client $instance = null;
 
     /**
      * Client class for handling HTTP requests to Flask ML backend.
@@ -48,7 +49,13 @@ class client {
      * @param \local_asystgrade\api\http_client_interface $httpclient This variable holds an interface for http_client
      */
     private function __construct(
-        private string $endpoint,
+        /**
+         * @var string $endpoint This variable holds a domain or IP to attached flask ML backend
+         */
+        private string                $endpoint,
+        /**
+         * @var \local_asystgrade\api\http_client_interface $httpclient This variable holds an interface for http_client
+         */
         private http_client_interface $httpclient
     ) {
     }

classes/api/http_client.php

@@ -27,44 +27,33 @@
 
 namespace local_asystgrade\api;
 
+use curl;
 use Exception;
 
 /**
  * HTTP client class for handling HTTP POST requests.
  */
 class http_client implements http_client_interface {
-
     /**
-     * Sends a POST request to the specified URL with the provided data.
+     * Sends a POST request using Moodle's curl wrapper.
      *
-     * @param string $url An endpoint URL. Could be an IP, a domain, or a container name, like flask.
+     * @param string $url An endpoint URL.
      * @param array $data The request payload.
-     *
      * @return bool|string
      * @throws Exception
      */
     public function post(string $url, array $data): bool|string {
-        $ch = curl_init($url);
-        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
-        curl_setopt($ch, CURLOPT_HTTPHEADER, ['Content-Type: application/json']);
-        curl_setopt($ch, CURLOPT_POST, 1);
-        curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($data));
-        $response = curl_exec($ch);
-
-        if (curl_errno($ch)) {
-            throw new Exception('Curl error: ' . curl_error($ch));
-        }
-
-        $statuscode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
-        curl_close($ch);
+        $curl = new curl();
+        $options = [
+            'CURLOPT_HTTPHEADER' => ['Content-Type: application/json'],
+        ];
 
-        if ($statuscode != 200) {
-            debugging("API Error: HTTP $statuscode - $response");
-            die('Error from API. Response code ' . $statuscode);
-        }
+        $response = $curl->post($url, json_encode($data), $options);
+        $info = $curl->get_info();
 
-        if ($response === false) {
-            throw new Exception('Error sending data to API');
+        if ($info['http_code'] !== 200) {
+            debugging("API Error: HTTP {$info['http_code']} - $response");
+            throw new Exception("HTTP request error: {$info['http_code']}");
         }
 
         return $response;

flask_ml_api/requirements.txt

@@ -4,4 +4,4 @@ matplotlib
 scikit-learn
 transformers
 pandas
-sentence_transformers
\ No newline at end of file
+sentence_transformers

lib.php

@@ -79,8 +79,8 @@ function local_asystgrade_before_footer(): void {
 function is_flask_backend_running(int $timeout = 3): bool {
     $apiendpoint = utils::get_api_endpoint();
     $urlcomponents = parse_url($apiendpoint);
-    $host = $urlcomponents['host'] ?? '127.0.0.1';
-    $port = $urlcomponents['port'] ?? 5001;
+    $host = $urlcomponents['host'];
+    $port = $urlcomponents['port'];
     $connection = @fsockopen($host, $port, $errno, $errstr, $timeout);
 
     if (is_resource($connection)) {
@@ -92,13 +92,3 @@ function is_flask_backend_running(int $timeout = 3): bool {
         return false;
     }
 }
-
-/**
- * Obtains URL Flask API from plugin settings.
- *
- * @return string URL API.
- * @throws dml_exception
- */
-function local_asystgrade_get_api_endpoint(): string {
-    return get_config('local_asystgrade', 'apiendpoint') ?? 'http://127.0.0.1:5001/api/autograde';
-}