# actix_web::actix::actix::dev::io::WriteHandler - Rust
API documentation for the Rust `WriteHandler` trait in crate `actix_web`.
Keywords: rust, rustlang, rust-lang, WriteHandler

# [−] Trait actix_web::actix::actix::dev::io::WriteHandler

    pub trait WriteHandler<E>: Actor + Actor where
        Self::Context: ActorContext, {
        fn error(&mut self, err: E, ctx: &mut Self::Context) -> Running { ... }
        fn finished(&mut self, ctx: &mut Self::Context) { ... }
    }

Write handler

`WriteHandler` is a helper for `AsyncWrite` types. Implementation of this trait is required for `Writer` and `FramedWrite` support.

## Provided Methods

### `fn error(&mut self, err: E, ctx: &mut Self::Context) -> Running`

Method is called when writer emits error.

If this method returns `ErrorAction::Continue` writer processing continues otherwise stream processing stops.

### `fn finished(&mut self, ctx: &mut Self::Context)`

Method is called when writer finishes.

By default this method stops actor's `Context`.

## Implementors

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