Reverse Find URL

This crate provides a parser to search a string for URLs in reverse order.

All functionality is handled by the Parser struct which takes chars as input.

Examples

Text can be fed into the parser in reverse order:

use rfind_url::{Parser, ParserState};

let mut parser = Parser::new();

for c in "There_is_no_URL_here".chars().rev() {
    assert_eq!(parser.advance(c), ParserState::MaybeUrl);
}

The parser returns the length of the URL as soon as the last character of the URL is pushed into it. Otherwise it will return None:

use rfind_url::{Parser, ParserState};

let mut parser = Parser::new();

// Parser guarantees there's currently no active URL
assert_eq!(parser.advance(' '), ParserState::NoUrl);

// URLs are only returned once they are complete
for c in "ttps://example.org".chars().rev() {
    assert_eq!(parser.advance(c), ParserState::MaybeUrl);
}

// Parser has detected a URL spanning the last 19 characters
assert_eq!(parser.advance('h'), ParserState::Url(19));