Enum CrawlEnhancement 

pub enum CrawlEnhancement {
    RenderUpgrade = 0,
    PointerAssist = 1,
    DnsGuard = 2,
    GatewayReacquire = 3,
    DnsHedge = 4,
}

The optional, on-by-default crawl enhancements. Each is behaviour a browser with the same capability built in would otherwise duplicate, so each can be turned off per-Website (via Configuration::with_enhancement) or fleet-wide (via its SPIDER_CHROME_* env var) when the crawl is fronted by such a browser.

The discriminant doubles as a dense index into EnhancementSettings, so keep the variants contiguous and in sync with CrawlEnhancement::ALL.

Variants

RenderUpgrade = 0

Re-fetch a thin HTTP response through a full browser render once the SPA-shell upgrade score crosses its threshold. Env: SPIDER_CHROME_RENDER_UPGRADE.

PointerAssist = 1

Clear a small interactive interstitial with a synthetic in-page pointer interaction. Env: SPIDER_CHROME_POINTER_ASSIST.

DnsGuard = 2

Short-circuit chrome navigation for a host already cached as unresolvable. Env: SPIDER_CHROME_DNS_GUARD.

GatewayReacquire = 3

Re-acquire a browser/gateway connection within the same request when the active one dies mid-flight. Env: SPIDER_CHROME_REACQUIRE.

DnsHedge = 4

Race a local-DNS probe against chrome navigation to fail unresolvable hosts fast. Env: SPIDER_CHROME_HEDGE_DNS_DELAY_MS (0 disables).

Implementations

impl CrawlEnhancement

pub const COUNT: usize = 5

Number of sections.

pub const ALL: [CrawlEnhancement; 5]

Every section, in discriminant order. Whole-map operations iterate this.

Trait Implementations

impl Clone for CrawlEnhancement

fn clone(&self) -> CrawlEnhancement

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for CrawlEnhancement

impl Debug for CrawlEnhancement

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for CrawlEnhancement

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for CrawlEnhancement

impl PartialEq for CrawlEnhancement

fn eq(&self, other: &CrawlEnhancement) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl Serialize for CrawlEnhancement

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for CrawlEnhancement