route.js
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/*!
* Express - router - Route
* Copyright(c) 2010 TJ Holowaychuk <tj@vision-media.ca>
* MIT Licensed
*/
/**
* Expose `Route`.
*/
module.exports = Route;
/**
* Initialize `Route` with the given HTTP `method`, `path`,
* and an array of `callbacks` and `options`.
*
* Options:
*
* - `sensitive` enable case-sensitive routes
* - `strict` enable strict matching for trailing slashes
*
* @param {String} method
* @param {String} path
* @param {Array} callbacks
* @param {Object} options.
* @api private
*/
function Route(method, path, callbacks, options) {
options = options || {};
this.path = path;
this.method = method;
this.callbacks = callbacks;
this.regexp = normalize(path
, this.keys = []
, options.sensitive
, options.strict);
}
/**
* Check if this route matches `path` and return captures made.
*
* @param {String} path
* @return {Array}
* @api private
*/
Route.prototype.match = function(path){
return this.regexp.exec(path);
};
/**
* Normalize the given path string,
* returning a regular expression.
*
* An empty array should be passed,
* which will contain the placeholder
* key names. For example "/user/:id" will
* then contain ["id"].
*
* @param {String|RegExp} path
* @param {Array} keys
* @param {Boolean} sensitive
* @param {Boolean} strict
* @return {RegExp}
* @api private
*/
function normalize(path, keys, sensitive, strict) {
if (path instanceof RegExp) return path;
path = path
.concat(strict ? '' : '/?')
.replace(/\/\(/g, '(?:/')
.replace(/(\/)?(\.)?:(\w+)(?:(\(.*?\)))?(\?)?/g, function(_, slash, format, key, capture, optional){
keys.push({ name: key, optional: !! optional });
slash = slash || '';
return ''
+ (optional ? '' : slash)
+ '(?:'
+ (optional ? slash : '')
+ (format || '') + (capture || (format && '([^/.]+?)' || '([^/]+?)')) + ')'
+ (optional || '');
})
.replace(/([\/.])/g, '\\$1')
.replace(/\*/g, '(.*)');
return new RegExp('^' + path + '$', sensitive ? '' : 'i');
}