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Code Issues Releases Wiki Activity

Add note about dealing with already compressed data

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Akos Vandra 2018-12-11 22:59:44 +01:00 committed by GitHub
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content/docs/response.md
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@ -71,6 +71,28 @@ fn index(req: HttpRequest) -> HttpResponse {
}
```
When dealing with an already compressed body (for example when serving assets),
set the content encoding to `Identity` to avoid compressing the already compressed
data and set the `content-encoding` header manually:
```rust
use actix_web::{HttpRequest, HttpResponse, http::ContentEncoding};
static HELLO_WORLD: &[u8] = &[
0x1f,0x8b,0x08,0x00,0xa2,0x30,0x10,0x5c,
0x00,0x03,0xcb,0x48,0xcd,0xc9,0xc9,0x57,
0x28,0xcf,0x2f,0xca,0x49,0xe1,0x02,0x00,
0x2d,0x3b,0x08,0xaf,0x0c,0x00,0x00,0x00
];
pub fn index(req: HttpRequest) -> HttpResponse {
HttpResponse::Ok()
.content_encoding(ContentEncoding::Identity)
.header("content-encoding", "gzip")
.body(HELLO_WORLD)
}
```
Also it is possible to set default content encoding on application level, by
default `ContentEncoding::Auto` is used, which implies automatic content compression
negotiation.