Struct cor_args::EnvHandler

pub struct EnvHandler<'a> { /* private fields */ }

A handler for retrieving values from environment variables.

This struct is responsible for handling requests by checking for the existence of an environment variable corresponding to the provided key. If the environment variable is not found, it delegates the request to the next handler (if provided).

Implementations

impl<'a> EnvHandler<'a>

pub fn new() -> Self

Creates a new EnvHandler with an optional next handler.

Arguments

• prefix - An optional prefix to which requests will prepend when handle_request() is executed.IfNone`, an empty string is assigned.
• next - An optional next handler to which requests can be delegated if this handler can’t fulfill them.

pub fn next(self, handler: Box<dyn Handler>) -> Self

pub fn prefix<S>(self, prefix: S) -> Self

where S: Into<Cow<'a, str>>,

Trait Implementations

impl<'a> Handler for EnvHandler<'a>

fn handle_request(&self, key: &str) -> Option<String>

Retrieves a value for the specified key from the environment variables.

If the environment variable corresponding to the key is not found, and if a next handler is provided, it delegates the request to the next handler. If there’s no next handler or if the key is not found both in the environment and the next handler, it returns None.

Arguments

• key - The key for which the value needs to be retrieved from environment variables.

impl<'a> Into<Box<dyn Handler + 'a>> for EnvHandler<'a>

fn into(self) -> Box<dyn Handler + 'a>

Converts this type into the (usually inferred) input type.