chore(deps): update topcoat requirement from =0.8.0 to =0.8.1

[dependabot]

Updates the requirements on topcoat to permit the latest version.

Release notes

Sourced from topcoat's releases.

v0.8.1

Topcoat 0.8.1 makes a bunch of routing-related improvements, including support for trailing slahes and relative route paths on the module router.

Relative paths in the module router

The module router derives a handler's path from its enclosing module: src/app/settings.rs serves /settings. Until now, a handler either used that module path or opted out of it with an absolute path string, which also opted it out of the module router. Serving /settings/export from settings.rs meant creating a settings/export.rs module for it.

A path string starting with ./ is now joined onto the module path. The handler stays in the module router, so module_router!() still discovers it, segment! and path_param! declarations in the module tree still apply to it, and layouts and layers still wrap it by prefix.

// src/app/settings.rs: GET /settings
#[page]
async fn settings() -> Result<impl View> {
    Ok(view! { <h1>"Settings"</h1> })
}
// src/app/settings.rs: POST /settings/export
#[page(POST "./export")]
async fn export() -> Result<impl View> {
Ok(view! { <p>"Export started"</p> })
}

The same form works for #[route], #[layout], and #[layer]. A layout declared with #[layout("./admin")] in settings.rs wraps the pages under /settings/admin, and a layer declared with #[layer("./v1")] in api.rs wraps every request under /api/v1. See the module router guide.

Absolute path strings behave as before: they disable module path derivation for that handler, and the handler is registered by name rather than discovered.

Trailing slashes

A path may now end in a /, and the slash is part of the path. A page at /users/ is served at /users/, and a page at /users is served at /users. In 0.8, a path ending in a slash was an empty segment and rejected outright.

By default, a request for the form a route did not declare is redirected to the declared one with a 308. The status code preserves the method and the body, so a form posted to /signup/ is resubmitted to a page at /signup. The query string is kept. RouterBuilder::trailing_slash selects one of three policies:

• TrailingSlash::Redirect redirects to the declared form. This is the default.
• TrailingSlash::Serve serves the route under both forms. The client keeps the URL it asked for, and the handler can read it through uri.
• TrailingSlash::Strict serves the declared form only, and the other form responds 404.

use topcoat::router::{Router, TrailingSlash};
let router = Router::builder()
.trailing_slash(TrailingSlash::Serve)
.build();

The policy never touches the root /, a route ending in a catch-all parameter, or a pair of routes registered at both forms of one path. A route that claims a form for itself is left alone.

In the module router, a bare ./ serves the module path itself with a trailing slash, and a relative path ending in a slash keeps it:

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Commits

• e9a6ee8 chore: release v0.8.1 (#395)
• 7db3c17 fix(cookie): cookies not being applied when responding with an error (#408)
• 4f82910 feat(router): trailing slash support and automatic redirects (#407)
• e0bc3b4 feat(router): relative module router routes (#406)
• 65b1de1 feat(router): allow using SeeOther as error (#398)
• See full diff in compare view

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