Referrer (HTTP Referer)

The referrer is information a browser sends in the Referer request header (spelled with one r in the standard) showing the URL of the page that linked to the current request.

Why it matters

Analytics tools use it to show where traffic comes from. It can also leak sensitive URLs, such as ones containing tokens, to third parties, so the Referrer-Policy header lets you control how much is sent.

Browsers have tightened defaults over the years, so absence of a referrer in your analytics does not always mean direct traffic; it may simply have been trimmed or withheld.

Example

Referer: https://news.example.org/story
Referrer-Policy: strict-origin-when-cross-origin

With that policy, cross-site requests only receive the origin, not the full path.

Common mistakes

• Putting session tokens or personal data in URLs, where they can leak via the header.
• Treating the header as trustworthy; clients can omit or forge it.
• Expecting full referrer data in analytics; many sources are stripped.

Related

• URL
• User agent
• Hyperlink
• HTTPS
• टूल: Http header checker

यह पेज सामान्य जानकारी है, जिसे हमारी संपादकीय टीम ने लिखा है और दस्तावेज़ीकरण बदलने पर अपडेट किया जाता है। सर्वर और प्रदाता अलग-अलग होते हैं, इसलिए बदलाव पहले सुरक्षित तरीके से जाँचें। देखें: संपादकीय नीति और अस्वीकरण.