Struct PathTraversalRule 

pub struct PathTraversalRule { /* private fields */ }

Rejects input containing path traversal patterns.

Detects:

• .. components (parent directory traversal)
• Absolute paths (/ prefix on Unix, drive letters on Windows)

This is a lexical check — no filesystem access is performed. URL-encoded sequences (e.g. %2e%2e) or other encodings are not decoded before inspection. Callers must decode the input before passing it to this rule if encoded traversal is a concern.

Rationale

Path traversal allows escaping a base directory:

../../etc/passwd
/absolute/path/escape

Implementations

impl PathTraversalRule

pub fn allow_absolute() -> Self

Create a rule that allows absolute paths (only rejects ..).

Trait Implementations

impl Default for PathTraversalRule

fn default() -> Self

Returns the “default value” for a type.

impl Rule for PathTraversalRule

fn name(&self) -> &'static str

A unique, human-readable identifier for this rule.

fn check(&self, input: &str) -> RuleResult

Check the input and return violations, if any.