Struct CheckpointData 

pub struct CheckpointData {
    pub request_urls: Vec<String>,
    pub seen_fingerprints: Vec<Vec<u8>>,
}

Serializable snapshot of crawler state for pause/resume support.

This struct is serialized to JSON and written to the crawl directory. On resume, the engine reads it back, re-enqueues the pending URLs, and repopulates the “seen” fingerprint set so that already-fetched pages are not fetched again.

Fields

request_urls: Vec<String>

URLs of requests still pending in the scheduler’s queue at the time the checkpoint was taken. These are re-enqueued on resume.

seen_fingerprints: Vec<Vec<u8>>

SHA-1 fingerprints of requests that have already been seen. Restoring these into the scheduler prevents re-fetching pages that were completed before the pause.

Trait Implementations

impl Clone for CheckpointData

fn clone(&self) -> CheckpointData

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CheckpointData

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

Formats the value using the given formatter.

impl Default for CheckpointData

fn default() -> CheckpointData

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for CheckpointData

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for CheckpointData

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

where __S: Serializer,

Serialize this value into the given Serde serializer.