> For the complete documentation index, see [llms.txt](https://neomatrixcode.gitbook.io/merly/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://neomatrixcode.gitbook.io/merly/guide/headers.md). # Headers The headers are returned on each endpoint within each HTTP structure. ```julia HTTP.Response(200 , HTTP.mkheaders(["Content-Type" => "text/plain"]) , body="I did something!") ``` However, if you need to always return a certain or certain headers in each route, to avoid unnecessary code repetition you can use the headersalways function, in the same way there is a method that allows you to configure CORS. ## headersalways It is a method that allows you to establish a headre or set of headers that will be returned as soon as a request is made to any endpoint. The headers will be placed in a row of tuples, these can be one or more headers. ```julia headersalways(["X-PINGOTHER" => "pingpong", "Y-PINGOTHER" => "text"]) ``` --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://neomatrixcode.gitbook.io/merly/guide/headers.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.