--- /dev/null
+/*!
+ * express
+ * Copyright(c) 2009-2013 TJ Holowaychuk
+ * Copyright(c) 2014-2015 Douglas Christopher Wilson
+ * MIT Licensed
+ */
+
+'use strict';
+
+/**
+ * Module dependencies.
+ * @api private
+ */
+
+var Buffer = require('safe-buffer').Buffer
+var contentDisposition = require('content-disposition');
+var contentType = require('content-type');
+var deprecate = require('depd')('express');
+var flatten = require('array-flatten');
+var mime = require('send').mime;
+var etag = require('etag');
+var proxyaddr = require('proxy-addr');
+var qs = require('qs');
+var querystring = require('querystring');
+
+/**
+ * Return strong ETag for `body`.
+ *
+ * @param {String|Buffer} body
+ * @param {String} [encoding]
+ * @return {String}
+ * @api private
+ */
+
+exports.etag = createETagGenerator({ weak: false })
+
+/**
+ * Return weak ETag for `body`.
+ *
+ * @param {String|Buffer} body
+ * @param {String} [encoding]
+ * @return {String}
+ * @api private
+ */
+
+exports.wetag = createETagGenerator({ weak: true })
+
+/**
+ * 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] || '/' === path[2])) return true; // Windows device path
+ if ('\\\\' === path.substring(0, 2)) return true; // Microsoft Azure absolute path
+};
+
+/**
+ * Flatten the given `arr`.
+ *
+ * @param {Array} arr
+ * @return {Array}
+ * @api private
+ */
+
+exports.flatten = deprecate.function(flatten,
+ 'utils.flatten: use array-flatten npm module instead');
+
+/**
+ * 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;
+};
+
+/**
+ * Generate Content-Disposition header appropriate for the filename.
+ * non-ascii filenames are urlencoded and a filename* parameter is added
+ *
+ * @param {String} filename
+ * @return {String}
+ * @api private
+ */
+
+exports.contentDisposition = deprecate.function(contentDisposition,
+ 'utils.contentDisposition: use content-disposition npm module instead');
+
+/**
+ * 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;
+}
+
+/**
+ * Compile "etag" value to function.
+ *
+ * @param {Boolean|String|Function} val
+ * @return {Function}
+ * @api private
+ */
+
+exports.compileETag = function(val) {
+ var fn;
+
+ if (typeof val === 'function') {
+ return val;
+ }
+
+ switch (val) {
+ case true:
+ fn = exports.wetag;
+ break;
+ case false:
+ break;
+ case 'strong':
+ fn = exports.etag;
+ break;
+ case 'weak':
+ fn = exports.wetag;
+ break;
+ default:
+ throw new TypeError('unknown value for etag function: ' + val);
+ }
+
+ return fn;
+}
+
+/**
+ * Compile "query parser" value to function.
+ *
+ * @param {String|Function} val
+ * @return {Function}
+ * @api private
+ */
+
+exports.compileQueryParser = function compileQueryParser(val) {
+ var fn;
+
+ if (typeof val === 'function') {
+ return val;
+ }
+
+ switch (val) {
+ case true:
+ fn = querystring.parse;
+ break;
+ case false:
+ fn = newObject;
+ break;
+ case 'extended':
+ fn = parseExtendedQueryString;
+ break;
+ case 'simple':
+ fn = querystring.parse;
+ break;
+ default:
+ throw new TypeError('unknown value for query parser function: ' + val);
+ }
+
+ return fn;
+}
+
+/**
+ * Compile "proxy trust" value to function.
+ *
+ * @param {Boolean|String|Number|Array|Function} val
+ * @return {Function}
+ * @api private
+ */
+
+exports.compileTrust = function(val) {
+ if (typeof val === 'function') return val;
+
+ if (val === true) {
+ // Support plain true/false
+ return function(){ return true };
+ }
+
+ if (typeof val === 'number') {
+ // Support trusting hop count
+ return function(a, i){ return i < val };
+ }
+
+ if (typeof val === 'string') {
+ // Support comma-separated values
+ val = val.split(/ *, */);
+ }
+
+ return proxyaddr.compile(val || []);
+}
+
+/**
+ * Set the charset in a given Content-Type string.
+ *
+ * @param {String} type
+ * @param {String} charset
+ * @return {String}
+ * @api private
+ */
+
+exports.setCharset = function setCharset(type, charset) {
+ if (!type || !charset) {
+ return type;
+ }
+
+ // parse type
+ var parsed = contentType.parse(type);
+
+ // set charset
+ parsed.parameters.charset = charset;
+
+ // format type
+ return contentType.format(parsed);
+};
+
+/**
+ * Create an ETag generator function, generating ETags with
+ * the given options.
+ *
+ * @param {object} options
+ * @return {function}
+ * @private
+ */
+
+function createETagGenerator (options) {
+ return function generateETag (body, encoding) {
+ var buf = !Buffer.isBuffer(body)
+ ? Buffer.from(body, encoding)
+ : body
+
+ return etag(buf, options)
+ }
+}
+
+/**
+ * Parse an extended query string with qs.
+ *
+ * @return {Object}
+ * @private
+ */
+
+function parseExtendedQueryString(str) {
+ return qs.parse(str, {
+ allowPrototypes: true
+ });
+}
+
+/**
+ * Return new empty object.
+ *
+ * @return {Object}
+ * @api private
+ */
+
+function newObject() {
+ return {};
+}
projects / josuexyz / .git / blobdiff