add debug info

lib/php/libsdk/SDK/FileOps.php

@@ -122,6 +122,8 @@ trait FileOps
 retry:
 		$ch = curl_init();
 
+	 echo "CALL $url \n";
+
 		curl_setopt($ch, CURLOPT_URL, $url);
 
 		if ($dest_fn) {
@@ -131,22 +133,27 @@ retry:
 			curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
 		}
 
-		curl_setopt($ch, CURLOPT_HEADER, false);
+		//curl_setopt($ch, CURLOPT_HEADER, false);
 		curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
 		curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
 		curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
 		curl_setopt($ch, CURLOPT_USERAGENT, Config::getSdkUserAgentName());
 		curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 10);
+		curl_setopt($ch, CURLOPT_VERBOSE, 1);
 
 	 	$token = getenv('API_TOKEN');
 	 	if (!empty($token)) {
-			curl_setopt($ch, CURLOPT_HTTPHEADER, ['Authorization: Bearer '.$token]);
+			echo "**** define authorization header ! ****\n";
+			var_dump(curl_setopt($ch, CURLOPT_HTTPHEADER, ['Accept: text/plain','X-custom-header: top1','Authorization: Bearer '.$token]));
 		}
+		echo "curl_error=". curl_error($ch) ."\n";
+
 
 		// workaround for <https://github.com/microsoft/php-sdk-binary-tools/issues/69>
 		curl_setopt($ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1);
 
 		$ret = curl_exec($ch);
+		var_dump($ret);
 
 		$code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
 		if (false === $ret || 200 !== $code) {