Initial commit for OpenECOMP SDN-C OA&M

[sdnc/oam.git] / dgbuilder / dgeflows / node_modules / express / node_modules / vary / README.md

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+# vary
+
+[![NPM Version](http://img.shields.io/npm/v/vary.svg?style=flat)](https://www.npmjs.org/package/vary)
+[![Node.js Version](http://img.shields.io/badge/node.js->=_0.8-blue.svg?style=flat)](http://nodejs.org/download/)
+[![Build Status](http://img.shields.io/travis/jshttp/vary.svg?style=flat)](https://travis-ci.org/jshttp/vary)
+[![Coverage Status](https://img.shields.io/coveralls/jshttp/vary.svg?style=flat)](https://coveralls.io/r/jshttp/vary)
+[![Gittip](http://img.shields.io/gittip/dougwilson.svg?style=flat)](https://www.gittip.com/dougwilson/)
+
+Manipulate the HTTP Vary header
+
+## Install
+
+```sh
+$ npm install vary
+```
+
+## API
+
+```js
+var vary = require('vary')
+```
+
+### vary(res, field)
+
+Adds the given header `field` to the `Vary` response header of `res`.
+This can be a string of a single field, a string of a valid `Vary`
+header, or an array of multiple fields.
+
+This will append the header if not already listed, otherwise leaves
+it listed in the current location.
+
+```js
+// Append "Origin" to the Vary header of the response
+vary(res, 'Origin')
+```
+
+### vary.append(header, field)
+
+Adds the given header `field` to the `Vary` response header string `header`.
+This can be a string of a single field, a string of a valid `Vary` header,
+or an array of multiple fields.
+
+This will append the header if not already listed, otherwise leaves
+it listed in the current location. The new header string is returned.
+
+```js
+// Get header string appending "Origin" to "Accept, User-Agent"
+vary.append('Accept, User-Agent', 'Origin')
+```
+
+## Testing
+
+```sh
+$ npm test
+```
+
+## License
+
+[MIT](LICENSE)