How can one define the headers once for all endpoints?

[artisanphil]

Currently I'm defining headers like this:

type ResponseHeaders struct {
	CacheControl string `header:"Cache-Control" example:"max-age=3600" json:"-"`
}

type MultiplePropertyOutput struct {
	ResponseHeaders
	Body struct {
		Hits    int        `json:"hits" example:"100" doc:"Number of properties returned"`
		Results []Property `json:"results"`
		Links   []Link     `json:"links"`
		Status  Status     `json:"status"`
	} `json:"body"`
}

With this I have to add the response header struct to every output struct that I define. I would like to set the headers just once where I define the routes. Otherwise I have to do it like this for each route:

resp := &models.MultiplePropertyOutput{}
resp.CacheControl = "max-age=86400"

Is that possible? I also have a small side-issue with this in that it returns "responseheaders" as a header in addition to cache-control:

Appreciate any help that I can get on this.