pub fn parse_retry_after(value: &str) -> Option<Duration>Expand description
Parse a Retry-After header value.
Accepts the integer-seconds form (Retry-After: 5). The
alternate RFC 1123 datetime form isn’t supported; callers
requiring it should parse the header themselves.
Returns None for missing or unparseable values, signaling
“fall back to exponential backoff” (the same semantic upstream
uses when its helper returns nil).