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  "readme": "# etag\n\n[![NPM Version][npm-image]][npm-url]\n[![NPM Downloads][downloads-image]][downloads-url]\n[![Node.js Version][node-version-image]][node-version-url]\n[![Build Status][travis-image]][travis-url]\n[![Test Coverage][coveralls-image]][coveralls-url]\n\nCreate simple HTTP ETags\n\nThis module generates HTTP ETags (as defined in RFC 7232) for use in\nHTTP responses.\n\n## Installation\n\nThis is a [Node.js](https://nodejs.org/en/) module available through the\n[npm registry](https://www.npmjs.com/). Installation is done using the\n[`npm install` command](https://docs.npmjs.com/getting-started/installing-npm-packages-locally):\n\n```sh\n$ npm install etag\n```\n\n## API\n\n<!-- eslint-disable no-unused-vars -->\n\n```js\nvar etag = require('etag')\n```\n\n### etag(entity, [options])\n\nGenerate a strong ETag for the given entity. This should be the complete\nbody of the entity. Strings, `Buffer`s, and `fs.Stats` are accepted. By\ndefault, a strong ETag is generated except for `fs.Stats`, which will\ngenerate a weak ETag (this can be overwritten by `options.weak`).\n\n<!-- eslint-disable no-undef -->\n\n```js\nres.setHeader('ETag', etag(body))\n```\n\n#### Options\n\n`etag` accepts these properties in the options object.\n\n##### weak\n\nSpecifies if the generated ETag will include the weak validator mark (that\nis, the leading `W/`). The actual entity tag is the same. The default value\nis `false`, unless the `entity` is `fs.Stats`, in which case it is `true`.\n\n## Testing\n\n```sh\n$ npm test\n```\n\n## Benchmark\n\n```bash\n$ npm run-script bench\n\n> etag@1.8.1 bench nodejs-etag\n> node benchmark/index.js\n\n  http_parser@2.7.0\n  node@6.11.1\n  v8@5.1.281.103\n  uv@1.11.0\n  zlib@1.2.11\n  ares@1.10.1-DEV\n  icu@58.2\n  modules@48\n  openssl@1.0.2k\n\n> node benchmark/body0-100b.js\n\n  100B body\n\n  4 tests completed.\n\n  buffer - strong x 258,647 ops/sec ±1.07% (180 runs sampled)\n  buffer - weak   x 263,812 ops/sec ±0.61% (184 runs sampled)\n  string - strong x 259,955 ops/sec ±1.19% (185 runs sampled)\n  string - weak   x 264,356 ops/sec ±1.09% (184 runs sampled)\n\n> node benchmark/body1-1kb.js\n\n  1KB body\n\n  4 tests completed.\n\n  buffer - strong x 189,018 ops/sec ±1.12% (182 runs sampled)\n  buffer - weak   x 190,586 ops/sec ±0.81% (186 runs sampled)\n  string - strong x 144,272 ops/sec ±0.96% (188 runs sampled)\n  string - weak   x 145,380 ops/sec ±1.43% (187 runs sampled)\n\n> node benchmark/body2-5kb.js\n\n  5KB body\n\n  4 tests completed.\n\n  buffer - strong x 92,435 ops/sec ±0.42% (188 runs sampled)\n  buffer - weak   x 92,373 ops/sec ±0.58% (189 runs sampled)\n  string - strong x 48,850 ops/sec ±0.56% (186 runs sampled)\n  string - weak   x 49,380 ops/sec ±0.56% (190 runs sampled)\n\n> node benchmark/body3-10kb.js\n\n  10KB body\n\n  4 tests completed.\n\n  buffer - strong x 55,989 ops/sec ±0.93% (188 runs sampled)\n  buffer - weak   x 56,148 ops/sec ±0.55% (190 runs sampled)\n  string - strong x 27,345 ops/sec ±0.43% (188 runs sampled)\n  string - weak   x 27,496 ops/sec ±0.45% (190 runs sampled)\n\n> node benchmark/body4-100kb.js\n\n  100KB body\n\n  4 tests completed.\n\n  buffer - strong x 7,083 ops/sec ±0.22% (190 runs sampled)\n  buffer - weak   x 7,115 ops/sec ±0.26% (191 runs sampled)\n  string - strong x 3,068 ops/sec ±0.34% (190 runs sampled)\n  string - weak   x 3,096 ops/sec ±0.35% (190 runs sampled)\n\n> node benchmark/stats.js\n\n  stat\n\n  4 tests completed.\n\n  real - strong x 871,642 ops/sec ±0.34% (189 runs sampled)\n  real - weak   x 867,613 ops/sec ±0.39% (190 runs sampled)\n  fake - strong x 401,051 ops/sec ±0.40% (189 runs sampled)\n  fake - weak   x 400,100 ops/sec ±0.47% (188 runs sampled)\n```\n\n## License\n\n[MIT](LICENSE)\n\n[npm-image]: https://img.shields.io/npm/v/etag.svg\n[npm-url]: https://npmjs.org/package/etag\n[node-version-image]: https://img.shields.io/node/v/etag.svg\n[node-version-url]: https://nodejs.org/en/download/\n[travis-image]: https://img.shields.io/travis/jshttp/etag/master.svg\n[travis-url]: https://travis-ci.org/jshttp/etag\n[coveralls-image]: https://img.shields.io/coveralls/jshttp/etag/master.svg\n[coveralls-url]: https://coveralls.io/r/jshttp/etag?branch=master\n[downloads-image]: https://img.shields.io/npm/dm/etag.svg\n[downloads-url]: https://npmjs.org/package/etag\n",
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