Refactor Authenticator and Fetcher classes for improved authorization handling

- Introduced a new method `getAuthorizationHeaderValue()` in the Authenticator class to return the authorization header value without the header name.
- Updated the Fetcher class to utilize the new method for cleaner authorization header management.
- Enhanced error handling in the HttpClient class by implementing a custom error handler to capture detailed error messages during HTTP requests.

Author: Palbahngmiyine

src/Libraries/Authenticator.php

@@ -5,17 +5,30 @@
 class Authenticator
 {
     /**
+     * Authorization 헤더 전체 문자열 반환 (헤더 이름 포함)
      * @param string $apiKey
      * @param string $apiSecretKey
-     * @return string
+     * @return string "Authorization: HMAC-SHA256 apiKey=..., date=..., salt=..., signature=..."
+     * @deprecated Use getAuthorizationHeaderValue() for PSR-7 compatible header value
      */
     public static function getAuthorizationHeaderInfo(string $apiKey, string $apiSecretKey): string
+    {
+        return "Authorization: " . self::getAuthorizationHeaderValue($apiKey, $apiSecretKey);
+    }
+
+    /**
+     * Authorization 헤더 값만 반환 (헤더 이름 제외)
+     * @param string $apiKey
+     * @param string $apiSecretKey
+     * @return string "HMAC-SHA256 apiKey=..., date=..., salt=..., signature=..."
+     */
+    public static function getAuthorizationHeaderValue(string $apiKey, string $apiSecretKey): string
     {
         date_default_timezone_set("Asia/Seoul");
         $date = date("Y-m-d\TH:i:s.Z\Z", time());
         $salt = uniqid();
         $signature = hash_hmac("sha256", $date . $salt, $apiSecretKey);
 
-        return "Authorization: HMAC-SHA256 apiKey={$apiKey}, date={$date}, salt={$salt}, signature={$signature}";
+        return "HMAC-SHA256 apiKey={$apiKey}, date={$date}, salt={$salt}, signature={$signature}";
     }
 }

src/Libraries/Fetcher.php

@@ -56,9 +56,7 @@ public function __destruct()
      */
     public function request(string $method, string $uri, $data = false)
     {
-        $authHeaderInfo = Authenticator::getAuthorizationHeaderInfo($this->apiKey, $this->apiSecretKey);
-        $headerParts = explode(': ', $authHeaderInfo, 2);
-        $authHeaderValue = $headerParts[1] ?? $authHeaderInfo;
+        $authHeaderValue = Authenticator::getAuthorizationHeaderValue($this->apiKey, $this->apiSecretKey);
 
         $url = self::API_URL . $uri;
         $body = '';

src/Libraries/HttpClient.php

@@ -60,18 +60,46 @@ public function sendRequest(RequestInterface $request): ResponseInterface
 
         $context = stream_context_create($contextOptions);
 
-        $responseBody = @file_get_contents($url, false, $context);
+        // 커스텀 에러 핸들러로 에러 캡처 (@ 연산자 대신)
+        $errorMessage = null;
+        set_error_handler(function ($severity, $message) use (&$errorMessage) {
+            $errorMessage = $message;
+            return true; // 기본 에러 핸들러 실행 방지
+        });
+
+        $responseBody = file_get_contents($url, false, $context);
+
+        restore_error_handler();
+
+        // $http_response_header는 file_get_contents 호출 후 자동으로 설정됨
+        $httpResponseHeader = $http_response_header ?? [];
 
         if ($responseBody === false) {
-            $error = error_get_last();
-            throw new HttpException(
-                $error['message'] ?? 'HTTP request failed: ' . $url
-            );
+            // 에러 메시지에 더 상세한 정보 포함
+            $errorDetails = [];
+            
+            if ($errorMessage !== null) {
+                $errorDetails[] = $errorMessage;
+            }
+            
+            // HTTP 응답 헤더가 있으면 상태 정보 추가
+            if (!empty($httpResponseHeader)) {
+                $statusLine = $httpResponseHeader[0] ?? null;
+                if ($statusLine !== null) {
+                    $errorDetails[] = "Response: {$statusLine}";
+                }
+            }
+            
+            $detailedMessage = !empty($errorDetails) 
+                ? implode(' | ', $errorDetails)
+                : 'HTTP request failed: ' . $url;
+
+            throw new HttpException($detailedMessage);
         }
 
-        $statusCode = $this->parseStatusCode($http_response_header ?? []);
-        $reasonPhrase = $this->parseReasonPhrase($http_response_header ?? []);
-        $responseHeaders = $this->parseHeaders($http_response_header ?? []);
+        $statusCode = $this->parseStatusCode($httpResponseHeader);
+        $reasonPhrase = $this->parseReasonPhrase($httpResponseHeader);
+        $responseHeaders = $this->parseHeaders($httpResponseHeader);
 
         return new Response($statusCode, $responseHeaders, $responseBody, '1.1', $reasonPhrase);
     }