1 files changed, 124 insertions, 0 deletions
diff --git a/common/src/main/webapp/usageguide/appserver/node_modules/express/node_modules/vary/index.js b/common/src/main/webapp/usageguide/appserver/node_modules/express/node_modules/vary/index.js
new file mode 100644
index 0000000..21dbaf1
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@@ -0,0 +1,124 @@
+/*!
+ * vary
+ * Copyright(c) 2014-2015 Douglas Christopher Wilson
+ * MIT Licensed
+ */
+
+'use strict';
+
+/**
+ * Module exports.
+ */
+
+module.exports = vary;
+module.exports.append = append;
+
+/**
+ * RegExp to match field-name in RFC 7230 sec 3.2
+ *
+ * field-name    = token
+ * token         = 1*tchar
+ * tchar         = "!" / "#" / "$" / "%" / "&" / "'" / "*"
+ *               / "+" / "-" / "." / "^" / "_" / "`" / "|" / "~"
+ *               / DIGIT / ALPHA
+ *               ; any VCHAR, except delimiters
+ */
+
+var fieldNameRegExp = /^[!#$%&'\*\+\-\.\^_`\|~0-9A-Za-z]+$/
+
+/**
+ * Append a field to a vary header.
+ *
+ * @param {String} header
+ * @param {String|Array} field
+ * @return {String}
+ * @api public
+ */
+
+function append(header, field) {
+  if (typeof header !== 'string') {
+    throw new TypeError('header argument is required');
+  }
+
+  if (!field) {
+    throw new TypeError('field argument is required');
+  }
+
+  // get fields array
+  var fields = !Array.isArray(field)
+    ? parse(String(field))
+    : field;
+
+  // assert on invalid field names
+  for (var i = 0; i < fields.length; i++) {
+    if (!fieldNameRegExp.test(fields[i])) {
+      throw new TypeError('field argument contains an invalid header name');
+    }
+  }
+
+  // existing, unspecified vary
+  if (header === '*') {
+    return header;
+  }
+
+  // enumerate current values
+  var val = header;
+  var vals = parse(header.toLowerCase());
+
+  // unspecified vary
+  if (fields.indexOf('*') !== -1 || vals.indexOf('*') !== -1) {
+    return '*';
+  }
+
+  for (var i = 0; i < fields.length; i++) {
+    var fld = fields[i].toLowerCase();
+
+    // append value (case-preserving)
+    if (vals.indexOf(fld) === -1) {
+      vals.push(fld);
+      val = val
+        ? val + ', ' + fields[i]
+        : fields[i];
+    }
+  }
+
+  return val;
+}
+
+/**
+ * Parse a vary header into an array.
+ *
+ * @param {String} header
+ * @return {Array}
+ * @api private
+ */
+
+function parse(header) {
+  return header.trim().split(/ *, */);
+}
+
+/**
+ * Mark that a request is varied on a header field.
+ *
+ * @param {Object} res
+ * @param {String|Array} field
+ * @api public
+ */
+
+function vary(res, field) {
+  if (!res || !res.getHeader || !res.setHeader) {
+    // quack quack
+    throw new TypeError('res argument is required');
+  }
+
+  // get existing header
+  var val = res.getHeader('Vary') || ''
+  var header = Array.isArray(val)
+    ? val.join(', ')
+    : String(val);
+
+  // set new header
+  if ((val = append(header, field))) {
+    res.setHeader('Vary', val);
+  }
+}