@keebler/azure-kusto-data
Azure Data Explorer Query SDK
Last updated 4 months ago by keebler .
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Microsoft Azure Kusto Data Library for Node

Installation

npm install azure-kusto-data

Quick Start

const KustoClient = require("azure-kusto-data").Client;
const KustoConnectionStringBuilder = require("azure-kusto-data").KustoConnectionStringBuilder;

const kcsb = KustoConnectionStringBuilder.withAadApplicationKeyAuthentication(`https://${clusterName}.kusto.windows.net`,'appid','appkey','authorityId');
const client = new KustoClient(kcsb);

client.execute("db", "TableName | limit 1", (err, results) => {
    if (err) throw new Error(err);
    console.log(JSON.stringify(results));
    console.log(results.primaryResults[0].toString());
});

Authentication

There are several authentication methods

AAD application

There are three ways to authenticate using AAD application: Option 1: Authenticating using AAD application id and corresponding key.

const kcsb = KustoConnectionStringBuilder.withAadApplicationKeyAuthentication(`https://${clusterName}.kusto.windows.net`,'appid','appkey','authorityId');

Option 2: Authenticating using AAD application id and corresponding certificate.

const kcsb = KustoConnectionStringBuilder.withAadApplicationCertificateAuthentication(`https://${clusterName}.kusto.windows.net`, 'appid', 'certificate', 'thumbprint', 'authorityId');

Option 3: Authenticating using (AAD Managed Identities)[https://docs.microsoft.com/en-us/azure/active-directory/managed-identities-azure-resources/overview].

const kcsb = KustoConnectionStringBuilder.withAadManagedIdentities(`https://${clusterName}.kusto.windows.net`, '(Optional)msiEndpoint', '(Optional)clientId');

Username/Password

KustoConnectionStringBuilder.withAadUserPasswordAuthentication(`https://${clusterName}.kusto.windows.net`,'username','password');

Authority is optional when it can inferred from the domain ('user@microsoft.com' would make the authority 'microsoft.com'). In any case it is possible to pass the authority id

KustoConnectionStringBuilder.withAadUserPasswordAuthentication(`https://${clusterName}.kusto.windows.net`,'username','password','authorityId');

Device

Using this method will write a token to the console, which can be used to authenticate at https://login.microsoftonline.com/common/oauth2/deviceauth and will allow temporary access.

<!>It is not meant for production purposes<!>

// will log the DEVICE token and url to use
KustoConnectionStringBuilder.withAadDeviceAuthentication(`https://${clusterName}.kusto.windows.net`, authId);

// in case you want to do your own thing with the response, you can pass a callback
// NOTICE: code will still block until device is authenticated
KustoConnectionStringBuilder.withAadDeviceAuthentication(`https://${clusterName}.kusto.windows.net`, authId, (toeknResponse) => {
    // your code, for example copy to clipboard or open url in browser
    console.log("Open " + tokenResponse.verificationUrl + " and use " + tokenResponse.userCode + " code to authorize.");
});

Usage

Query language docs can be found at https://docs.microsoft.com/en-us/azure/data-explorer/write-queries#overview-of-the-query-language

Advanced Usage

ClientRequestProperties

For more fine grained control, we expose ClientRequestProperties.

const ClientRequestProperties = require("azure-kusto-data").ClientRequestProperties;
const Client = require("azure-kusto-data").Client;

const client = new Client("http://cluster.region.kusto.windows.net");
const query = `
declare query_parameters(amount:long);
T | where amountColumn == amount
`;
const clientRequestProps = new ClientRequestProperties();
clientRequestProps.setOption("servertimeout", 1000 * 60);
clientRequestProps.setParameter("amount", 100);
client.executeQuery("db", query, (err, results) => { console.log(results); }, clientRequestProps);

A full list of those properties can be found at https://docs.microsoft.com/en-us/azure/kusto/api/netfx/request-properties

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