Client for Azure Application Insights REST API

README.md

AppInsights Client for Nodejs

Because the LogAnalyticsClient Azure SDK is not usable

Usage

import { AppInsightsClient } from './AppInsightsClient'

const client = new AppInsightsClient('AI_APPID', 'AI_APIKEY')

const timespan = 'PT4H'
const query = 'customEvents | where name == 'foo' | limit 5'

const objects = await client.query(query, timespan)

Get an API Key

AppInsightsClient.ts

import * as rp from 'request-promise-native'

function convertTable (columns: any[], rows: any[]): any[] {
  return rows.map((row: any[]) => columns.reduce((obj, col, idx) => {
    obj[col.name] = row[idx]
    return obj
  }, {}))
}

// API reference @ https://dev.applicationinsights.io/reference
export class AppInsightsClient {
  private static instance: AppInsightsClient

  // eslint-disable-next-line no-useless-constructor
  constructor (
    private appId: string = process.env.AAI_APPID,
    private apiKey: string = process.env.AAI_APIKEY,
    private baseUrl: string = 'https://api.applicationinsights.io/v1/apps'
  ) {}

  static getInstance () {
    if (!AppInsightsClient.instance) AppInsightsClient.instance = new AppInsightsClient()
    return AppInsightsClient.instance
  }

  private baseRequest (options: any = { uri: '' }): Promise<any> {
    return rp({
      baseUrl: `${this.baseUrl}/${this.appId}`,
      json: true,
      headers: { 'x-api-key': this.apiKey },
      ...options
    })
  }

  // Docs: https://dev.applicationinsights.io/reference/post-query
  async query (query: string, timespan: string): Promise<any> {
    const options = {
      method: 'POST',
      uri: `/query?timespan=${timespan}`,
      body: { query }
    }
    return this.baseRequest(options).then(d => convertTable(d.tables[0].columns, d.tables[0].rows))
  }
}