70 lines
2.2 KiB
Markdown
70 lines
2.2 KiB
Markdown
# http-timer
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> Timings for HTTP requests
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[](https://travis-ci.org/szmarczak/http-timer)
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[](https://coveralls.io/github/szmarczak/http-timer?branch=master)
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[](https://packagephobia.now.sh/result?p=@szmarczak/http-timer)
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Inspired by the [`request` package](https://github.com/request/request).
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## Usage
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```js
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'use strict';
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const https = require('https');
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const timer = require('@szmarczak/http-timer');
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const request = https.get('https://httpbin.org/anything');
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const timings = timer(request);
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request.on('response', response => {
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response.on('data', () => {}); // Consume the data somehow
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response.on('end', () => {
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console.log(timings);
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});
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});
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// { start: 1535708511443,
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// socket: 1535708511444,
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// lookup: 1535708511444,
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// connect: 1535708511582,
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// upload: 1535708511887,
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// response: 1535708512037,
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// end: 1535708512040,
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// phases:
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// { wait: 1,
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// dns: 0,
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// tcp: 138,
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// request: 305,
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// firstByte: 150,
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// download: 3,
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// total: 597 } }
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```
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## API
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### timer(request)
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Returns: `Object`
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- `start` - Time when the request started.
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- `socket` - Time when a socket was assigned to the request.
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- `lookup` - Time when the DNS lookup finished.
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- `connect` - Time when the socket successfully connected.
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- `upload` - Time when the request finished uploading.
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- `response` - Time when the request fired the `response` event.
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- `end` - Time when the response fired the `end` event.
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- `error` - Time when the request fired the `error` event.
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- `phases`
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- `wait` - `timings.socket - timings.start`
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- `dns` - `timings.lookup - timings.socket`
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- `tcp` - `timings.connect - timings.lookup`
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- `request` - `timings.upload - timings.connect`
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- `firstByte` - `timings.response - timings.upload`
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- `download` - `timings.end - timings.response`
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- `total` - `timings.end - timings.start` or `timings.error - timings.start`
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**Note**: The time is a `number` representing the milliseconds elapsed since the UNIX epoch.
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## License
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MIT
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