Struct Client 

pub struct Client { /* private fields */ }

HTTP client used to probe sites.

Cheap to clone — the underlying reqwest::Client is reference-counted internally, and the throttle is Arc-backed, so cloning is the recommended way to share a client between tasks. Cloned clients share throttle state, which is what you want: a fan-out scan must not accidentally exceed a per-host budget by spawning more clients.

Implementations

impl Client

pub fn builder() -> ClientBuilder

Start configuring a new client.

pub async fn check(&self, site: &Site, username: &Username) -> CheckOutcome

Probe a single site for username, retrying on transient bans.

Network failures, timeouts, and unexpected response shapes all yield MatchKind::Uncertain with a descriptive note. The method never returns an error: at the executor level we want a partial result for every site, not abort-on-first-failure semantics.

When ban detection classifies a response as rate_limited / cloudflare_challenge, the call is retried with jittered exponential backoff (configurable via ClientBuilder::max_retries). Non-ban Uncertain (network errors, body read failures) is not retried — those failures rarely fix themselves in the seconds-to-minutes window we’d block for.

pub async fn fetch(&self, url: &str) -> Option<RawResponse>

Fetch a URL and return raw response data (status, final URL, body) with the same throttle / User-Agent / proxy machinery as check, but without signal evaluation or retry.

Returns None on any network/transport error. Intended for diagnostics such as adler --doctor --fix, which diffs the responses for a known-present and a nonsense user to derive a signature.

pub async fn fetch_for_doctor( &self, site: &Site, url: &str, ) -> Option<RawResponse>

Same as Self::fetch but routes through the configured browser backend when the site is tagged bot-protected and a backend is available. Used by doctor::suggest_fix so that the diff-derivation works against the JS-rendered page (login wall vs. real profile) rather than two identical raw-HTTP shells.

Falls back to raw HTTP if (a) no browser is configured, (b) the site isn’t bot-protected, or (c) the browser fetch fails — so callers get the same Option<RawResponse> shape either way.

Trait Implementations

impl Clone for Client

fn clone(&self) -> Client

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Client

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

Formats the value using the given formatter.