[User Warning] Cache-Control header has already been set. Please use HTTPCacheControl API to set caching options instead.

GET /events/calendar/ics/announcement-7/20190602T-20190607T

Line 381 in /var/www/html/framework/control/HTTP.php

Source

372 			return;
373 		}
374 
375 		// Warn if already assigned cache-control headers
376 		if ($body && $body->getHeader('Cache-Control')) {
377 			trigger_error(
378 				'Cache-Control header has already been set. '
379 				. 'Please use HTTPCacheControl API to set caching options instead.',
380 				E_USER_WARNING
381 			);
382 			return;
383 		}
384 
385 		$config = Config::inst()->forClass(__CLASS__);
386 
387 		// Get current cache control state

Trace

BEGIN:VCALENDAR PRODID:-//miccai.org//EN VERSION:2.0 METHOD:PUBLISH BEGIN:VEVENT DTSTART;TZID=America/New_York:20190602T DTEND;TZID=America/New_York:20190607T URL:http://miccai.org/events/calendar/ SUMMARY:IPMI2019 - The 26th international conference on Information Processing in Medical Imaging. LOCATION: DESCRIPTION:The 26th international conference on Information Processing in Medical Imaging (IPMI) June 2-7, 2019, The Hong Kong University of Science and Technology (HKUST). END:VEVENT END:VCALENDAR