Struct Forwarding 

pub struct Forwarding(/* private fields */);

Trillium handler for forwarded/x-forwarded-* headers

See crate-level docs for an explanation

Implementations

impl Forwarding

pub fn trust_ips<'a>(ips: impl IntoIterator<Item = &'a str>) -> Self

builds a Forwarding handler that trusts a list of strings that represent either specific IPs or a CIDR range.

let forwarding = Forwarding::trust_ips(["10.1.10.1"]);
let forwarding = Forwarding::trust_ips(["10.1.10.1", "192.168.0.0/16"]);

Panics

Panics if any of the provided strings is neither an ip address nor a CIDR range.

pub fn trust_fn<F>(trust_predicate: F) -> Self

where F: Fn(&IpAddr) -> bool + Send + Sync + 'static,

builds a Forwarding handler that trusts a peer ip based on the provided predicate function.

let forwarding = Forwarding::trust_fn(IpAddr::is_loopback);
let forwarding = Forwarding::trust_fn(|ip| match ip {
    IpAddr::V6(_) => false,
    IpAddr::V4(ipv4) => ipv4.is_link_local(),
});

pub fn trust_always() -> Self

builds a Forwarding handler that expects that all http connections will always come from a trusted and spec-compliant reverse proxy. This should only be used in situations in which the application is either running inside of a vpc and the reverse proxy ip cannot be known. Using an overbroad trust rule such as trust_always introduces security risk to an application, as it allows any request to forge Forwarded headers.

Trait Implementations

impl Debug for Forwarding

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Forwarding

fn default() -> Forwarding

Returns the “default value” for a type.

impl Handler for Forwarding

async fn run(&self, conn: Conn) -> Conn

Executes this handler, performing any modifications to the Conn that are desired.

fn init(&mut self, info: &mut Info) -> impl Future<Output = ()> + Send

Performs one-time async set up on a mutable borrow of the Handler before the server starts accepting requests. This allows a Handler to be defined in synchronous code but perform async setup such as establishing a database connection or fetching some state from an external source. This is optional, and chances are high that you do not need this.

fn before_send(&self, conn: Conn) -> impl Future<Output = Conn> + Send

Performs any final modifications to this conn after all handlers have been run. Although this is a slight deviation from the simple conn->conn->conn chain represented by most Handlers, it provides an easy way for libraries to effectively inject a second handler into a response chain. This is useful for loggers that need to record information both before and after other handlers have run, as well as database transaction handlers and similar library code.

fn has_upgrade(&self, upgrade: &Upgrade) -> bool

predicate function answering the question of whether this Handler would like to take ownership of the negotiated Upgrade. If this returns true, you must implement Handler::upgrade. The first handler that responds true to this will receive ownership of the trillium::Upgrade in a subsequent call to Handler::upgrade

fn upgrade(&self, upgrade: Upgrade) -> impl Future<Output = ()> + Send

This will only be called if the handler reponds true to Handler::has_upgrade and will only be called once for this upgrade. There is no return value, and this function takes exclusive ownership of the underlying transport once this is called. You can downcast the transport to whatever the source transport type is and perform any non-http protocol communication that has been negotiated. You probably don’t want this unless you’re implementing something like websockets. Please note that for many transports such as TcpStreams, dropping the transport (and therefore the Upgrade) will hang up / disconnect.

fn name(&self) -> Cow<'static, str>

Customize the name of your handler. This is used in Debug implementations. The default is the type name of this handler.