rest uri parser / matcher

rest-uri-parser.js

function parse(route, pathname) {
  var keys = [];

  var regexpstr = route.split('/').map(function(part) {
    if (part.startsWith(':')) {
      keys.push(part.substring(1));
      return '([^/]+)';
    } else {
      return escape(part);
    }
  }).join(escape('/'));

  var matches = pathname.match(new RegExp('^' + regexpstr + '$'));

  if (!matches) return false;

  matches.shift();

  return keys.reduce(function(params, key) {
    params[key] = matches.shift();
    return params;
  }, {});
}

function escape(str) {
  return str.replace(/[-\/\\^$*+?.()|[\]{}]/g, '\\$&');
}

parse('/users/:id/posts', '/users/123/posts');
//=> { id: '123' }
parse('/users/:user_id/posts/:post_id', '/users/123/posts/456');
//=> { user_id: '123', post_id: '456' }
parse('/foo/bar/baz', '/foo/bar/baz');
//=> {}
parse('/foo/bar/baz', '/hoge/fuga/piyo');
//=> false