Struct actix_web::middleware::csrf::CsrfFilter

pub struct CsrfFilter { /* fields omitted */ }

A middleware that filters cross-site requests.

To construct a CSRF filter:

1. Call CsrfFilter::build to start building.
2. Add allowed origins.
3. Call finish to retrieve the constructed filter.

Example

use actix_web::middleware::csrf;
use actix_web::App;

let app = App::new()
    .middleware(csrf::CsrfFilter::new().allowed_origin("https://www.example.com"));

Methods

impl CsrfFilter

pub fn new() -> CsrfFilter

Start building a CsrfFilter.

pub fn allowed_origin<T: Into<String>>(self, origin: T) -> CsrfFilter

Add an origin that is allowed to make requests. Will be verified against the Origin request header.

pub fn allow_xhr(self) -> CsrfFilter

Allow all requests with an X-Requested-With header.

A cross-site attacker should not be able to send requests with custom headers unless a CORS policy whitelists them. Therefore it should be safe to allow requests with an X-Requested-With header (added automatically by many JavaScript libraries).

This is disabled by default, because in Safari it is possible to circumvent this using redirects and Flash.

Use this method to enable more lax filtering.

pub fn allow_missing_origin(self) -> CsrfFilter

Allow requests if the expected Origin header is missing (and there is no Referer to fall back on).

The filter is conservative by default, but it should be safe to allow missing Origin headers because a cross-site attacker cannot prevent the browser from sending Origin on unprotected requests.

pub fn allow_upgrade(self) -> CsrfFilter

Allow cross-site upgrade requests (for example to open a WebSocket).

Trait Implementations

impl Default for CsrfFilter

fn default() -> CsrfFilter

Returns the "default value" for a type.

impl<S> Middleware<S> for CsrfFilter

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

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

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

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

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

Method is called after body stream get sent to peer.