This library provides a safe and idiomatic interface to the Varnish C API, allowing you to write Varnish modules (VMODs) in Rust. See the crate documentation for more details.
Some VMODs that use this library:
- vmod-reqwest: issue HTTP calls from VCL, use dynamic, HTTPS backends (support HTTP2)
- vmod-rers: support for dynamic regex, including response body manipulation
- vmod-fileserver: serve files directly from disk, without the need for an HTTP backend
Don't hesitate to open GitHub issues if something is unclear or impractical. You can also join us on discord.
When compiling, this library generates bindings from the libvarnish headers. Depending on you Linux distribution, you may need to install the related package, which could be named varnish-devel, varnish-dev or maybe libvarnish-dev.
Before v0.1.0, this library relied on a specific version of libvarnish. Since v0.1.0, this is no longer the case, and it should work with multiple supported Varnish versions.
| varnish-rs (Rust) | libvarnish (C) |
|---|---|
| 0.1.0 | 7.4 - 7.6 |
| 0.0.18 - 0.0.19 | 7.5 |
| 0.0.17 | 7.4 |
| 0.0.15 - 0.0.16 | 7.3 |
| 0.0.12 - 0.0.14 | 7.2 |
| 0.0.9 - 0.0.11 | 7.1 |
| 0.0.0 - 0.0.8 | 7.0 |
- This project is easier to develop with just, a modern alternative to
make. Install it withcargo install just. - To get a list of available commands, run
just. - To run tests, use
just test.
It is recommended if your varnish headers are installed where pkg-config can find them. If not, you can set the VARNISH_INCLUDE_PATHS environment variable to a colon-separated list of paths to search, but note that build.rs script cannot detect libvarnish version, and assumes the latest.
VARNISH_INCLUDE_PATHS=/my/custom/libpath:/my/other/custom/libpath cargo build