Request Headers

Request Headers

During this phase, headers in the incoming client request can be modified or set. This is crucial for tasks like appending security tokens, adjusting origin-forwarded values, or transforming the client information before it reaches the application.

Example: Before routing a request to a particular service, adding a header to specify the desired version of the API: X-API-Version: v2.

Actions

• early_hints.send: Generate and send a 103 Early Hints informational response to the client. This can help the browser start preloading resources while the origin is preparing the full response.
• http.request.headers.set: Changes or adds a new request header. If the value is empty, the header will be removed.
• http.request.headers.remove: Removes specified request headers.

Fields

Available fields in the Request Headers phase:

• Standard Request Fields
• GeoIP Fields
• User Agent Fields
• Bot Fields
• Fingerprint Fields
• Origin Shield Fields
• Peakhour Fields
• Peakhour Server Fields