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