Added node-modules

node_modules/express/lib/utils.js

@@ -0,0 +1,313 @@
+
+/**
+ * Module dependencies.
+ */
+
+var mime = require('connect').mime
+  , crc32 = require('buffer-crc32');
+
+/**
+ * toString ref.
+ */
+
+var toString = {}.toString;
+
+/**
+ * Return ETag for `body`.
+ *
+ * @param {String|Buffer} body
+ * @return {String}
+ * @api private
+ */
+
+exports.etag = function(body){
+  return '"' + crc32.signed(body) + '"';
+};
+
+/**
+ * Make `locals()` bound to the given `obj`.
+ *
+ * This is used for `app.locals` and `res.locals`.
+ *
+ * @param {Object} obj
+ * @return {Function}
+ * @api private
+ */
+
+exports.locals = function(obj){
+  function locals(obj){
+    for (var key in obj) locals[key] = obj[key];
+    return obj;
+  };
+
+  return locals;
+};
+
+/**
+ * Check if `path` looks absolute.
+ *
+ * @param {String} path
+ * @return {Boolean}
+ * @api private
+ */
+
+exports.isAbsolute = function(path){
+  if ('/' == path[0]) return true;
+  if (':' == path[1] && '\\' == path[2]) return true;
+};
+
+/**
+ * Flatten the given `arr`.
+ *
+ * @param {Array} arr
+ * @return {Array}
+ * @api private
+ */
+
+exports.flatten = function(arr, ret){
+  var ret = ret || []
+    , len = arr.length;
+  for (var i = 0; i < len; ++i) {
+    if (Array.isArray(arr[i])) {
+      exports.flatten(arr[i], ret);
+    } else {
+      ret.push(arr[i]);
+    }
+  }
+  return ret;
+};
+
+/**
+ * Normalize the given `type`, for example "html" becomes "text/html".
+ *
+ * @param {String} type
+ * @return {Object}
+ * @api private
+ */
+
+exports.normalizeType = function(type){
+  return ~type.indexOf('/')
+    ? acceptParams(type)
+    : { value: mime.lookup(type), params: {} };
+};
+
+/**
+ * Normalize `types`, for example "html" becomes "text/html".
+ *
+ * @param {Array} types
+ * @return {Array}
+ * @api private
+ */
+
+exports.normalizeTypes = function(types){
+  var ret = [];
+
+  for (var i = 0; i < types.length; ++i) {
+    ret.push(exports.normalizeType(types[i]));
+  }
+
+  return ret;
+};
+
+/**
+ * Return the acceptable type in `types`, if any.
+ *
+ * @param {Array} types
+ * @param {String} str
+ * @return {String}
+ * @api private
+ */
+
+exports.acceptsArray = function(types, str){
+  // accept anything when Accept is not present
+  if (!str) return types[0];
+
+  // parse
+  var accepted = exports.parseAccept(str)
+    , normalized = exports.normalizeTypes(types)
+    , len = accepted.length;
+
+  for (var i = 0; i < len; ++i) {
+    for (var j = 0, jlen = types.length; j < jlen; ++j) {
+      if (exports.accept(normalized[j], accepted[i])) {
+        return types[j];
+      }
+    }
+  }
+};
+
+/**
+ * Check if `type(s)` are acceptable based on
+ * the given `str`.
+ *
+ * @param {String|Array} type(s)
+ * @param {String} str
+ * @return {Boolean|String}
+ * @api private
+ */
+
+exports.accepts = function(type, str){
+  if ('string' == typeof type) type = type.split(/ *, */);
+  return exports.acceptsArray(type, str);
+};
+
+/**
+ * Check if `type` array is acceptable for `other`.
+ *
+ * @param {Object} type
+ * @param {Object} other
+ * @return {Boolean}
+ * @api private
+ */
+
+exports.accept = function(type, other){
+  var t = type.value.split('/');
+  return (t[0] == other.type || '*' == other.type)
+    && (t[1] == other.subtype || '*' == other.subtype)
+    && paramsEqual(type.params, other.params);
+};
+
+/**
+ * Check if accept params are equal.
+ *
+ * @param {Object} a
+ * @param {Object} b
+ * @return {Boolean}
+ * @api private
+ */
+
+function paramsEqual(a, b){
+  return !Object.keys(a).some(function(k) {
+    return a[k] != b[k];
+  });
+}
+
+/**
+ * Parse accept `str`, returning
+ * an array objects containing
+ * `.type` and `.subtype` along
+ * with the values provided by
+ * `parseQuality()`.
+ *
+ * @param {Type} name
+ * @return {Type}
+ * @api private
+ */
+
+exports.parseAccept = function(str){
+  return exports
+    .parseParams(str)
+    .map(function(obj){
+      var parts = obj.value.split('/');
+      obj.type = parts[0];
+      obj.subtype = parts[1];
+      return obj;
+    });
+};
+
+/**
+ * Parse quality `str`, returning an
+ * array of objects with `.value`,
+ * `.quality` and optional `.params`
+ *
+ * @param {String} str
+ * @return {Array}
+ * @api private
+ */
+
+exports.parseParams = function(str){
+  return str
+    .split(/ *, */)
+    .map(acceptParams)
+    .filter(function(obj){
+      return obj.quality;
+    })
+    .sort(function(a, b){
+      if (a.quality === b.quality) {
+        return a.originalIndex - b.originalIndex;
+      } else {
+        return b.quality - a.quality;
+      }
+    });
+};
+
+/**
+ * Parse accept params `str` returning an
+ * object with `.value`, `.quality` and `.params`.
+ * also includes `.originalIndex` for stable sorting
+ *
+ * @param {String} str
+ * @return {Object}
+ * @api private
+ */
+
+function acceptParams(str, index) {
+  var parts = str.split(/ *; */);
+  var ret = { value: parts[0], quality: 1, params: {}, originalIndex: index };
+
+  for (var i = 1; i < parts.length; ++i) {
+    var pms = parts[i].split(/ *= */);
+    if ('q' == pms[0]) {
+      ret.quality = parseFloat(pms[1]);
+    } else {
+      ret.params[pms[0]] = pms[1];
+    }
+  }
+
+  return ret;
+}
+
+/**
+ * Escape special characters in the given string of html.
+ *
+ * @param  {String} html
+ * @return {String}
+ * @api private
+ */
+
+exports.escape = function(html) {
+  return String(html)
+    .replace(/&/g, '&amp;')
+    .replace(/"/g, '&quot;')
+    .replace(/</g, '&lt;')
+    .replace(/>/g, '&gt;');
+};
+
+/**
+ * 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|Array} path
+ * @param  {Array} keys
+ * @param  {Boolean} sensitive
+ * @param  {Boolean} strict
+ * @return {RegExp}
+ * @api private
+ */
+
+exports.pathRegexp = function(path, keys, sensitive, strict) {
+  if (toString.call(path) == '[object RegExp]') return path;
+  if (Array.isArray(path)) path = '(' + path.join('|') + ')';
+  path = path
+    .concat(strict ? '' : '/?')
+    .replace(/\/\(/g, '(?:/')
+    .replace(/(\/)?(\.)?:(\w+)(?:(\(.*?\)))?(\?)?(\*)?/g, function(_, slash, format, key, capture, optional, star){
+      keys.push({ name: key, optional: !! optional });
+      slash = slash || '';
+      return ''
+        + (optional ? '' : slash)
+        + '(?:'
+        + (optional ? slash : '')
+        + (format || '') + (capture || (format && '([^/.]+?)' || '([^/]+?)')) + ')'
+        + (optional || '')
+        + (star ? '(/*)?' : '');
+    })
+    .replace(/([\/.])/g, '\\$1')
+    .replace(/\*/g, '(.*)');
+  return new RegExp('^' + path + '$', sensitive ? '' : 'i');
+}