When measuring activity with the Piwik Tracking API, the following HTTP headers may be used:

  • Host – the hostname of the HTTP request, the hostname of the Piwik server.
  • Referer – used to track Referrer information such as website, search engine, social network.
  • User-Agent – used to detect the information about browsers, operating system, devices by device-detector library.
  • Cookie – when Opted-out from tracking, or when Third party cookies are used.
  • Origin – used when cross-origin resource sharing is enabled.
  • Accept-Language – used to detect the users’ language
  • X-Forwarded-Proto, X-Forwarded-Host, X-Forwarded-For – when Piwik is setup behind a proxy
  • DNT – used to detect whether a visitor’s device is opted-out from tracking (Piwik privacy)

Any questions?

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