Crate salvo_compression 

Compression middleware for the Salvo web framework.

This middleware automatically compresses HTTP responses using various algorithms, reducing bandwidth usage and improving load times for clients.

Supported Algorithms

Algorithm	Feature	Content-Encoding
Gzip	gzip	gzip
Brotli	brotli	br
Deflate	deflate	deflate
Zstd	zstd	zstd

Example

use salvo_compression::{Compression, CompressionLevel};
use salvo_core::prelude::*;

let compression = Compression::new()
    .enable_gzip(CompressionLevel::Default)
    .min_length(1024);  // Only compress responses > 1KB

let router = Router::new()
    .hoop(compression)
    .get(my_handler);

Algorithm Negotiation

The middleware negotiates the compression algorithm based on the client’s Accept-Encoding header. By default, it respects the client’s preference order. Use force_priority(true) to use the server’s configured priority instead.

Compression Levels

• CompressionLevel::Fastest: Fastest compression, larger output
• CompressionLevel::Default: Balanced compression (recommended)
• CompressionLevel::Minsize: Best compression, slower
• CompressionLevel::Precise(u32): Fine-grained control

Default Content Types

By default, the middleware compresses:

• text/* (HTML, CSS, plain text, etc.)
• application/javascript
• application/json
• application/xml, application/rss+xml
• application/wasm
• image/svg+xml

Use .content_types() to customize which MIME types are compressed.

Minimum Length

Small responses may not benefit from compression. Use .min_length(bytes) to skip compression for responses smaller than the specified size.

Read more: https://salvo.rs

Structs

Compression

Compression

Enums

CompressionAlgo

CompressionAlgo

CompressionLevel

Level of compression data should be compressed with.