yslow-data-rest-api

A REST API for storing web performance data from YSlow.

It receives test results using YSlow's beacon mechanism and makes them available through a JSON API. Data is persisted to MongoDB with the yslow-data-service package.

Requirements

• MongoDB
• Node.js with NPM

Installation

npm install yslow-data-rest-api

Usage

Start the server:

yslow-data-rest-api

Configure YSlow to send requests to the beacon end-point. Here's an example with YSlow for PhantomJS:

phantomjs yslow.js -b http://localhost:3000/beacon -i basic http://www.bbc.co.uk/

Head to http://localhost:3000/results to see the test results:

{
  "results": [
    {
      "id": "52b887a7e486520836000003",
      "timestamp": "2013-12-23T18:57:43.216Z",
      "data": {
        "v": "3.1.8",
        "w": 510283,
        "o": 76,
        "u": "http://www.bbc.co.uk/",
        "r": 87,
        "i": "ydefault",
        "lt": 1706
      }
    }
  ]
}

Configuration

To start the server on a different port/host then use the -p and -H flags:

yslow-data-rest-api -p 8080 -H localhost

By default the REST API is configured to use a MongoDB database at mongodb://127.0.0.1:27017/yslow. To change this, set the environment variable YSLOW_DATA_DB e.g.

EXPORT YSLOW_DATA_DB="mongodb://127.0.0.1:27017/some_db"

API

POST /beacon

Accepts YSlow beacon requests

Example request

curl -i -X POST -H "Content-Type: application/json" -d '{"v": "3.1.8", "w": 510283, "o": 76, "u": "http://www.bbc.co.uk/", "r": 87, "i": "ydefault", "lt": 1706}' http://localhost:3000/beacon

Example response

HTTP/1.1 201 Created
Location: /results/52b88a9ca7b09dcc36000001

{
  "results": [
    {
      "id": "52b8c2bc1544b91d5a000001",
      "timestamp": "2013-12-23T23:09:48.626Z",
      "data": {
        "v": "3.1.8",
        "w": 510283,
        "o": 76,
        "u": "http://www.bbc.co.uk/",
        "r": 87,
        "i": "ydefault",
        "lt": 1706
      }
    }
  ]
}

GET /results

Returns stored results

Parameters

• url - Filters results by URL
• limit - Limits the number of results returned

Example request

curl -i "http://localhost:3000/results?url=http://www.bbc.co.uk/&limit=5"

Example response

HTTP/1.1 200 OK
Content-Type: application/json; charset=utf-8

{
  "results": [
    {
      "id": "52b8c26e6a9782d25900001a",
      "timestamp": "2013-12-23T23:08:30.229Z",
      "data": {
        "v": "3.1.8",
        "w": 538060,
        "o": 76,
        "u": "http://www.bbc.co.uk",
        "r": 88,
        "i": "ydefault",
        "lt": 1883
      }
    }
  ]
}

DELETE /results

Deletes all results

Example request

curl -i -X DELETE http://localhost:3000/results

Example response

HTTP/1.1 204 No Content

GET /results/:id

Returns a single result by its ID

Example request

curl -i http://localhost:3000/results/52b88c58a3d2f8fd36000004

Example response

{
  "results": [
    {
      "id": "52b8c26e6a9782d25900001a",
      "timestamp": "2013-12-23T23:08:30.229Z",
      "data": {
        "v": "3.1.8",
        "w": 538060,
        "o": 76,
        "u": "http://www.bbc.co.uk",
        "r": 88,
        "i": "ydefault",
        "lt": 1883
      }
    }
  ]
}

DELETE /results/:id

Deletes a single result by its ID

Example request

curl -i -X DELETE http://localhost:3000/results/52b88c58a3d2f8fd36000004

Example response

HTTP/1.1 204 No Content

GET /results/latest

Returns the latest result

Parameters

• url - Returns the latest result for the given URL

Example request

curl -i "http://localhost:3000/results/latest?url=http://www.bbc.co.uk"

Example response

HTTP/1.1 200 OK
Content-Type: application/json; charset=utf-8

{
  "results": [
    {
      "id": "52b8c4c2c4dea4fb5c00001b",
      "timestamp": "2013-12-23T23:18:26.710Z",
      "data": {
        "v": "3.1.8",
        "w": 538060,
        "o": 76,
        "u": "http://www.bbc.co.uk",
        "r": 88,
        "i": "ydefault",
        "lt": 1883
      }
    }
  ]
}

GET /urls

Returns the distinct URLs that have been tested

Example request

curl -i "http://localhost:3000/urls"

Example response

HTTP/1.1 200 OK
Content-Type: application/json; charset=utf-8

{
  "urls": [
    "http://www.bbc.co.uk/weather/",
    "http://www.bbc.co.uk/news/"
  ]
}