# Struct actix_web::middleware::DefaultHeaders[−][src]

    pub struct DefaultHeaders { /* fields omitted */ }

`Middleware` for setting default response headers.

This middleware does not set header if response headers already contains it.

    use actix_web::{http, middleware, App, HttpResponse};

    fn main() {
        let app = App::new()
            .middleware(middleware::DefaultHeaders::new().header("X-Version", "0.2"))
            .resource("/test", |r| {
                r.method(http::Method::GET).f(|_| HttpResponse::Ok());
                r.method(http::Method::HEAD)
                    .f(|_| HttpResponse::MethodNotAllowed());
            })
            .finish();
    }

## Methods

###

`impl DefaultHeaders`

[src]

####

`pub fn new() -> DefaultHeaders`

[src]

Construct `DefaultHeaders` middleware.

####

`pub fn header<K, V>(self, key: K, value: V) -> Self where HeaderName: HttpTryFrom<K>, HeaderValue: HttpTryFrom<V>,`

[src]

Set a header.

####

`pub fn content_type(self) -> Self`

[src]

Set CONTENT-TYPE header if response does not contain this header.

## Trait Implementations

###

`impl Default for DefaultHeaders`

[src]

####

`fn default() -> Self`

[src]

Returns the "default value" for a type. Read more

###

`impl<S> Middleware<S> for DefaultHeaders`

[src]

####

`fn response(&self, _: &HttpRequest<S>, resp: HttpResponse) -> Result<Response>`

[src]

Method is called when handler returns response, but before sending http message to peer. Read more

####

`fn start(&self, req: &HttpRequest<S>) -> Result<Started>`

[src]

Method is called when request is ready. It may return future, which should resolve before next middleware get called. Read more

####

`fn finish(&self, req: &HttpRequest<S>, resp: &HttpResponse) -> Finished`

[src]

Method is called after body stream get sent to peer.

## Auto Trait Implementations

###

`impl Send for DefaultHeaders`

###

`impl Sync for DefaultHeaders`

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