mirror of
https://github.com/robertwayne/axum-htmx
synced 2024-12-27 18:59:32 +01:00
124 lines
4 KiB
Markdown
124 lines
4 KiB
Markdown
# axum-htmx
|
|
|
|
<!-- markdownlint-disable -->
|
|
<div align="right">
|
|
<a href="https://crates.io/crates/axum-htmx">
|
|
<img src="https://img.shields.io/crates/v/axum-htmx?style=flat-square" alt="crates.io badge">
|
|
</a>
|
|
<a href="https://docs.rs/axum-htmx/latest/">
|
|
<img src="https://img.shields.io/docsrs/axum-htmx?style=flat-square" alt="docs.rs badge">
|
|
</a>
|
|
</div>
|
|
<br>
|
|
<!-- markdownlint-enable -->
|
|
|
|
`axum-htmx` is a small extension library providing extractors and request guards
|
|
for the various [htmx](https://htmx.org/) headers within
|
|
[axum](https://github.com/tokio-rs/axum). Additionally, the library exports
|
|
const values for all of the htmx headers, so there's no need to mess with
|
|
strings in your handlers.
|
|
|
|
## Getting Started
|
|
|
|
Simply run `cargo add axum-htmx` to add the library to your project.
|
|
|
|
If you are using the unreleased branch of `axum` from GitHub, you can build
|
|
against the `main` version of `axum-htmx` by adding the following to your
|
|
`Cargo.toml`:
|
|
|
|
```toml
|
|
[dependencies]
|
|
axum-htmx = { git = "https://github.com/robertwayne/axum-htmx" }
|
|
```
|
|
|
|
## Extractors
|
|
|
|
All of the [htmx request headers](https://htmx.org/reference/#request_headers)
|
|
have a supported extractor. Additionally, all extractors are infallible, meaning
|
|
they will always succeed and never return an error. If the header is not
|
|
present, the extractor will return `None` or `false` in most cases.
|
|
|
|
| Header | Extractor | Value |
|
|
| --- | --- | --- |
|
|
| `HX-Boosted` | `HxBoosted` | `bool` |
|
|
| `HX-Current-URL` | `HxCurrentUrl` | `Option<String>` |
|
|
| `HX-History-Restore-Request` | `HxHistoryRestoreRequest` | `bool` |
|
|
| `HX-Prompt` | `HxPrompt` | `Option<String>` |
|
|
| `HX-Request` | `HxRequest` | `bool` |
|
|
| `HX-Target` | `HxTarget` | `Option<String>` |
|
|
| `HX-Trigger-Name` | `HxTriggerName` | `Option<String>` |
|
|
| `HX-Trigger` | `HxTrigger` | `Option<String>` |
|
|
|
|
## Request Guards
|
|
|
|
__Requires features `guards`.__
|
|
|
|
In addition to the extractors, there is also a route-wide layer request guard
|
|
for the `HX-Request` header. This will return a `403: Forbidden` response if the
|
|
header is not present, which is useful if you want to make an entire router, say
|
|
`/api`, only accessible via htmx requests.
|
|
|
|
## Example: Extractors
|
|
|
|
In this example, we'll look for the `HX-Boosted` header, which is set when
|
|
applying the [hx-boost](https://htmx.org/attributes/hx-boost/) attribute to an
|
|
element. In our case, we'll use it to determine what kind of response we send.
|
|
|
|
When is this useful? When using a templating engine, like
|
|
[minijinja](https://github.com/mitsuhiko/minijinja), it is common to extend
|
|
different templates from a `_base.html` template. However, htmx works by sending
|
|
partial responses, so extending our `_base.html` would result in lots of extra
|
|
data being sent over the wire.
|
|
|
|
If we wanted to swap between pages, we would need to support both full template
|
|
responses and partial responses _(as the page can be accessed directly or
|
|
through a boosted anchor)_, so we look for the `HX-Boosted` header and extend
|
|
from a `_partial.html` template instead.
|
|
|
|
```rs
|
|
use axum::response::IntoResponse;
|
|
use axum_htmx::HxBoosted;
|
|
|
|
async fn get_index(HxBoosted(boosted): HxBoosted) -> impl IntoResponse {
|
|
if boosted {
|
|
// Send a template extending from _partial.html
|
|
} else {
|
|
// Send a template extending from _base.html
|
|
}
|
|
}
|
|
```
|
|
|
|
### Example: Router Guard
|
|
|
|
```rs
|
|
use axum::Router;
|
|
use axum_htmx::HxRequestGuardLayer;
|
|
|
|
fn protected_router() -> Router {
|
|
Router::new()
|
|
.layer(HxRequestGuardLayer::new())
|
|
}
|
|
```
|
|
|
|
### Feature Flags
|
|
|
|
<!-- markdownlint-disable -->
|
|
| Flag | Default | Description | Dependencies |
|
|
|-|-|-|-|
|
|
| `guards`| Disabled | Adds request guard layers. | `tower`, `futures-core`, `pin-project-lite` |
|
|
<!-- markdownlint-enable -->
|
|
|
|
## Contributing
|
|
|
|
Contributions are always welcome! If you have an idea for a feature or find a
|
|
bug, let me know. PR's are appreciated, but if it's not a small change, please
|
|
open an issue first so we're all on the same page!
|
|
|
|
## License
|
|
|
|
`axum-htmx` is dual-licensed under either
|
|
|
|
- **[MIT License](/LICENSE-MIT)**
|
|
- **[Apache License, Version 2.0](/LICENSE-APACHE)**
|
|
|
|
at your option.
|