Governify-npm

This is BETA module and may have bugs and don't work correctly. It is intended for qualified beta testers only and must not be used in production systems.

The node module to control API using Governify tools. This module is a middleware which you can use on ExpressJS or ConnectJS.

Intallation

On your application package run next command:

$ npm install governify

Example

To control the api you must use governify.control(app, [options]) see Options Object

var governify = require('governify');
var express = require('express');
var app = express();
var port = 9999;

governify.control(app, options = {
    datastore: "http://datastore.governify.io/api/v6.1",
    namespace: "default",
    apiKeyVariable: "apikey",
    defaultPath: "/api",
    customMetrics: [
        {
            method: 'POST,GET',
            term: 'RequestTerm',
            metric: 'Requests',
            calculate: function(currentValue, req, res, callback){
                //asyncronousCalculation
                callback( parseInt(actualValue) + 1 );
            }
        },
        {
            metric: 'AVGResponseTime',
            calculate: function(currentValue, req, res, callback){
                //asyncronousCalculation
                callback( res._headers['x-response-time'] );
            }
        }
    ]
});

var birds = [
    {
        "id" : "234h235buh45bhy456",
        "specie" : "Halcon",
        "place" : "Doñana",
        "legDiameter" : 1.0,
        "wingSize" : 10.0,
        "eggs" : 10,
        "hatches" : 2
    }
]
app.get("/api/v1/birds", function(req, res){
    res.send(birds);
    res.end();
});

app.listen(port, function(){
    console.log("App listening on port: ", port);
});

NOTE: You must do requests with ?apikey=:key. For example:

curl -X GET http://localhost:9999/api/v1/birds?apikey=proUser1

Options object

Field Name	Type	Description
datastore	string	Optional This is the endpoint URL where the service that stores and analyzes the agreement is located. NOTE: If you want to use our datastore, you haven't to give value to this field and the module is going to use datastore by default.
namespace	string	Optional This field can be used to make out two type of agreement or two type of service, e.g. if you have two services named "api1" and "api2" you can store, analyze and check by different namespaces. By default: "default"
apiKeyVariable	string	Optional This field defines the name of url param which will be checked and that will contain the key to identify the agreement of current request. By default: "apikey"
defaultPath	string	Optional This field defines the default path that is used by middleware for metrics without path field. By default: "/"
customMetrics	[metricObject](#metricsObject)	Optional This field defines the middelwares to control term with custom metrics

Metric object

This object defines fileds to create a middleware and to assosiate an agreement term to it.

Field Name	Type	Description
path	string	Optional Path over the middleware is applicated.
method	string	Optional Method over the middleware is applicated.
term	string	Optional Middleware is assosiated to this term, that must be specified on the SLA.
metric	string	Optional The metric that will be update by this middleware.
calculate	Function	Optional This is a function that calculates the value of metric. If you need to calculate it asynchronous you must use: callback(value), else you use: return value.

Example

• Example 1

{
    datastore: "http://datastore.governify.io/api/v6.1",
    namespace: "default",
    apiKeyVariable: "apikey",
    path: "/api",
    customMetrics: [
        {
            path: "/api",
            method: "POST",
            term: 'ResourcesTerm',
            metric: 'Resources',
            calculate: function(currentValue, req, res, callback){
                //asynchronousCalculation
                db.find({}, function(contact){
                    callback( contact.lenght );
                });				
            }
        }
    ]
}

On this example you must do request with ?apikey=:key. For example:

curl -X GET http://localhost:9999/api/v1/birds?apikey=proUser1

The URL that will be used to check if "key" is authorized is:

http://datastore.governify.io/api/v6.1/default/agreements/proUser1

And customMetrics creates a middleware that checks if ResourceTerm is fulfilled and updates the Resources metric with the value that is calculated asynchronously.

• Example 2

{
    datastore: "http://datastore.governify.io/api/v6.1",
    namespace: "service1",
    apiKeyVariable: "user",
    path: "/api",
    customMetrics: [
        {
            path: "/api",
            method: "POST",
            term: 'RequestTerm',
            metric: 'Requests',
            calculate: function(currentValue, req, res, callback){
                //synchronousCalculation
                return actualValue + 1;			
            }
        }
    ]
}

On this example you must do request with ?user=:key. For example:

curl -X GET http://localhost:9999/api/v1/birds?user=proUser1

The URL that will be used to check if "key" is authorized is:

http://datastore.governify.io/api/v6.1/service1/agreements/proUser1

And customMetrics creates a middleware that checks if RequestTerm is fulfilled and updates the Requests metric with the value that is calculated synchronously.