Struct Config 

pub struct Config {
    pub url: Option<String>,
    pub provider: CdnProvider,
    pub purge_token: Option<String>,
    pub purge_zone: Option<String>,
    pub provider_error: Option<String>,
}

Provider-agnostic CDN configuration. Read via Config::from_env; build the active purge adapter with Config::build_purge_api.

Token security

purge_token is never logged. Debug prints <redacted> for it.

Fields

url: Option<String>

CDN base URL fronting the bucket (CDN_URL). Drives Disk::cdn_url().

provider: CdnProvider

Selected provider for cache invalidation (CDN_PROVIDER).

purge_token: Option<String>

Provider API credential (CDN_PURGE_TOKEN). Never logged.

purge_zone: Option<String>

Provider-specific zone or endpoint id (CDN_PURGE_ZONE).

provider_error: Option<String>

Set when CDN_PROVIDER is explicitly provided but fails to parse. build_purge_api converts this into a boot Error (D-03 / SC-5b).

Implementations

impl Config

pub fn from_env() -> Self

Read CDN config from environment: the quartet primary + per-var legacy fallbacks.

Provider resolution runs first; token/zone aliases are then scoped to the resolved provider so that a stray credential from a different provider’s legacy cluster cannot win the fallback race.

If CDN_PROVIDER is set to an unrecognized value the struct is returned with provider_error set; the parse failure is surfaced as a boot Error by Config::build_purge_api.

pub fn build_purge_api(&self) -> Result<Option<Box<dyn PurgeApi>>, Error>

Build the active purge adapter, or Ok(None) for provider None.

Returns Err(CdnInvalidProvider) when CDN_PROVIDER was set to an unrecognized value during from_env (D-03 boot error, SC-5b). Returns Err(CdnFeatureRequired) if the selected provider’s cargo feature is off.

Trait Implementations

impl Clone for Config

fn clone(&self) -> Config

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Config

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Config

fn default() -> Config

Returns the “default value” for a type.