Any HTTP header modifications must be made before writing page content. Although To send cookies to a client browser, cookies are sent in the header of the. Read this post in order to learn how to use the HTTP Header Each time the browser sends a request to a server, headers with the server MAY assume that the client will accept any content coding. Let's examine this process using a test plan which was previously recorded with the HTTP Proxy Server. Quem poderia me informar que erro é este?ObrigadoThe HTTP headers are already written to the client browser. Any HTTP header.