Trait RequestDecorator 

pub trait RequestDecorator:
    Send
    + Sync
    + 'static {
    type Output: Send + 'static;

    // Required method
    fn extract(
        ctx: &RequestContext,
        parts: &Parts,
    ) -> Result<Self::Output, HttpException>;
}

Request Decorator Trait

A custom request decorator (extractor) defines custom logic for extracting data from an incoming HTTP request. This is the foundation for creating custom extractors beyond the built-in ones.

Type Parameters

• Self: The decorator type implementing the trait

Associated Types

• Output: The type that gets extracted from the request

Example

struct UserAgent;
impl RequestDecorator for UserAgent {
    type Output = String;
    fn extract(ctx: &RequestContext, parts: &Parts) -> Result<Self::Output, HttpException> {
        parts.headers
            .get("user-agent")
            .and_then(|h| h.to_str().ok())
            .map(|s| s.to_string())
            .ok_or_else(|| HttpException::bad_request("Missing User-Agent"))
    }
}

Required Associated Types

type Output: Send + 'static

Required Methods

fn extract( ctx: &RequestContext, parts: &Parts, ) -> Result<Self::Output, HttpException>

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors