Managed API for Service Now

Managed API for Service Now is an API Client for Service Now by Adaptavist primarily designed for the use in ScriptRunner Connect. You can read more about Managed APIs here.

This is a runtime agnostic version of the Managed API (with core suffix) that makes it easy to port it to any runtime you may want to use this Managed API on.

Platform specific ports

• ScriptRunner Connect

Supported API calls

• fetch
• Attachment
  • deleteAttachment
  • getAttachments
  • getMetadataForAttachment
  • uploadBinaryFile
  • uploadMultipartFile
• Table
  • addRecord
  • deleteRecord
  • getRecord
  • getRecords
  • updateRecord
  • updateRecordWithNameValuePair

Porting to other runtimes

While the primary reason for creating Managed APIs was to use them in ScriptRunner Connect runtime, then you can easily port them to any runtime of your choosing.

You can do so by extending the *Core Managed API class where you'll be asked to provide implementation for getPlatformImplementation function. In this implementation you have yo specify how to perform buffer encoding/decoding operations and how to perform HTTP calls:

{
    buffer: {
        encode(input: string): ArrayBuffer;
        decode(input: ArrayBuffer): string;
    },
    performHttpCall(request: Request): Promise<Response>
}

Here is an example how to create a Node port of the Managed API:

import { ServiceNowApiCore } from "@managed-api/service-now-core";
import { PlatformImplementation, Request, Response, Headers } from "@managed-api/commons-core";
import fetch from "node-fetch";

export class ServiceNowApi extends ServiceNowApiCore {
    constructor(private baseUrl: string, private authToken: string) {
        super();
    }

    protected getPlatformImplementation(): PlatformImplementation {
        return {
            buffer: {
                encode: (input) => Buffer.from(input, 'utf-8'),
                decode: (input) => Buffer.from(input).toString('utf-8')
            },
            performHttpCall: (request) => this.performHttpCall(request)
        };
    }

    private async performHttpCall(request: Request): Promise<Response> {
        const requestUrl = `${this.baseUrl}${request.url}`; // Substitute base URL
        request.headers.set('Authorization', `Basic ${this.authToken}`); // Substitute auth token
        const response = await fetch(requestUrl, {
            method: request.method,
            headers: request.headers as any,
            body: request.method.toLowerCase() !== 'get' ? Buffer.from((await request.arrayBuffer()) ?? new ArrayBuffer(0)) : undefined
        });

        const apiHeaders = new Headers();
        response.headers.forEach((value, key) => apiHeaders.append(key, value));

        const body = await response.arrayBuffer();

        return super.buildResponse(response.url, response.status, response.statusText, apiHeaders, body);
    }
}

Please note that the authentication handling details may not be accurate and serve as an example. If you wish yo use these Managed APIs without having to concern yourself how to deal with and secure authentication details when working with APIs, then feel free to evaluate ScriptRunner Connect platform.

Contact

At this time Managed APIs are unlicensed and close sourced, but feel free to drop an email to [email protected] for ideas, suggestions and improvements.

Changelog

• 2.1.0

  • Added Content-Type: application/octet-stream header to Upload Binary File to a Record that can be used as Attachment.uploadBinaryFile or All.uploadBinaryFile.

• 2.0.0

  • Breaking change: URL and query string parameters are now URL encoded, meaning if you encoded them explicitly before you have to remove your own encoding, otherwise they will get double encoded.

• 0.3.0

  • Added support for the following Attachment methods:
    • Delete Attachment that can be used as Attachment.deleteAttachment or All.deleteAttachment.
    • Get Attachments that can be used as Attachment.getAttachments or All.getAttachmentst.
    • Get Attachment that can be used as Attachment.getMetadataForAttachment or All.getMetadataForAttachment.
    • Upload Binary File to a Record that can be used as Attachment.uploadBinaryFile or All.uploadBinaryFile.
    • Upload Multipart File Attachment that can be used as Attachment.uploadMultipartFile or All.uploadMultipartFile.
  • Added support for the following Table methods:
    • Delete Record from Table that can be used as Table.deleteRecord or All.deleteRecord.
    • Retrieve multiple Records for the Table that can be used as Table.getRecords or All.getRecords.
    • Retrieve a Tecord that can be used as Table.getRecord or All.getRecord.
    • Update a Tecord with the name-value pairs that can be used as Table.updateRecordWithNameValuePair or All.updateRecordWithNameValuePair.
    • Insert a Record in the Table that can be used as Table.addRecord or All.addRecord.
    • Update a Record that can be used as Table.updateRecord or All.updateRecord.

• 0.1.5

  • Fixed README

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