Enum SpiderError 

pub enum SpiderError {
    Config(String),
    Fetch(FetchError),
    Browser(BrowserError),
    Session(String),
    Checkpoint(String),
    RobotsTxt(String),
    Other(String),
}

The central error type for everything that can go wrong during a crawl.

Each variant wraps either a structured error from a downstream crate or a human-readable String describing the problem. You will typically encounter this type through the Result alias rather than constructing it directly.

Variants

Config(String)

A configuration validation error, raised when spider settings are invalid (for example, a negative checkpoint interval). The string describes what was wrong with the configuration.

Fetch(FetchError)

An error originating from the HTTP fetch layer (scrapling-fetch). This wraps the underlying FetchError so you can inspect network-level details such as connection timeouts or DNS failures.

Browser(BrowserError)

An error originating from the browser automation layer (scrapling-browser). This wraps the underlying BrowserError, which covers headless-browser launch failures, page navigation errors, and similar issues.

Session(String)

A session management error, raised when a requested session ID does not exist or when a duplicate session is registered. Check the contained message for the list of available session IDs.

Checkpoint(String)

A checkpoint save or restore error, raised when the crawler cannot write or read its state snapshot on disk. Common causes include missing directories and permission problems.

RobotsTxt(String)

A robots.txt parsing or enforcement error. In practice this variant is rarely surfaced because the robots.txt manager degrades gracefully (treating unparseable files as “allow all”), but it exists for explicit error paths.

Other(String)

A catch-all error for uncategorized failures that do not fit into any other variant. Use this sparingly; prefer a more specific variant when one applies.

Trait Implementations

impl Debug for SpiderError

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

Formats the value using the given formatter.

impl Display for SpiderError

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

Formats the value using the given formatter.

impl Error for SpiderError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl From<BrowserError> for SpiderError

fn from(e: BrowserError) -> Self

Converts to this type from the input type.

impl From<FetchError> for SpiderError

fn from(e: FetchError) -> Self

Converts to this type from the input type.