Struct ExpressionEvaluator 

pub struct ExpressionEvaluator { /* private fields */ }

Evaluates security expressions against a user.

Spring Security Equivalent

MethodSecurityExpressionHandler

Example

use actix_security_core::http::security::expression::{
    ExpressionEvaluator, SecurityExpression, DefaultExpressionRoot
};

let evaluator = ExpressionEvaluator::new();
let expr = SecurityExpression::parse("hasRole('ADMIN')")?;
let result = evaluator.evaluate(expr.ast(), Some(&user))?;

Implementations

impl ExpressionEvaluator

pub fn new() -> Self

Creates a new evaluator with the default expression root.

pub fn with_root<R: ExpressionRoot + 'static>(root: R) -> Self

Creates a new evaluator with a custom expression root.

Example

let custom_root = MyCustomExpressionRoot::new();
let evaluator = ExpressionEvaluator::with_root(custom_root);

pub fn evaluate( &self, expr: &Expression, user: Option<&User>, ) -> Result<bool, EvaluationError>

Evaluates an expression against a user.

Arguments

• expr - The expression AST to evaluate
• user - The authenticated user, if any

Returns

• Ok(true) - Access granted
• Ok(false) - Access denied
• Err(EvaluationError) - Evaluation failed (unknown function, etc.)

pub fn evaluate_str( &self, expr: &str, user: Option<&User>, ) -> Result<bool, ExpressionError>

Parses and evaluates an expression string.

Convenience method that combines parsing and evaluation.

Arguments

• expr - The expression string
• user - The authenticated user, if any

Returns

• Ok(true) - Access granted
• Ok(false) - Access denied
• Err - Parse or evaluation error

Trait Implementations

impl Clone for ExpressionEvaluator

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Default for ExpressionEvaluator

fn default() -> Self

Returns the “default value” for a type.