If there is no referer set (for example on page refresh) craft.app.request.referrer throws type casting error

[jripmeester]

Description

When you get the referer from craft.app.request.referrer and there is no referer it should return null. But the type casting only allows the function to return a string so it throws an error.

Return value of craft\web\twig\variables\Request::getUrlReferrer() must be of the type string, null returned

Steps to reproduce

1. get referer from craft.app.request.referrer in your twig template
2. refresh page

Additional info

• Craft version: 3.1.19 (Pro)
• PHP version: 7.1.27
• OS version: Linux 3.10.0-862.14.4.el7.x86_64
• Database driver & version: MySQL 5.5.5
• Image driver & version: GD 7.1.27
• Plugins & versions:
  • Contact Form 2.2.3
  • Contact Form Extensions 1.1.1
  • Contact Form Honeypot 1.0.2
  • Cookie Consent Banner 1.1.2
  • Craft Commerce 2.1.2
  • Image Resizer 2.0.4
  • Instant Analytics 1.1.0
  • Linkit 1.1.10
  • Logs 3.0.0
  • Mailchimp Subscribe v2.0.4
  • Mailgun 1.4.2
  • Mollie for Craft Commerce 2.0.1
  • Navigation 1.1.11
  • Redactor 2.3.2
  • SEOmatic 3.1.46
  • Video Embedder 1.1.1
  • VZ URL 2.1.1

[brandonkelly]

Thanks for reporting that! Fixed for the next release.

Note that craft.request.getUrlReferrer()/craft.request.urlReferrer has been deprecated in Craft 3. You should be using craft.app.request.referrer instead.

[jripmeester]

Thanks Brandon!