ews-javascript-api

import { ExchangeService, OAuthCredentials, ExchangeVersion } from "ews-javascript-api"; import { EwsOAuthHelper } from "ews-javascript-api/lib/EwsOAuthHelper"; const clientId = process.env.EWS_CLIENT_ID ?? ''; const clientSecret = process.env.EWS_CLIENT_SECRET ?? ''; const tenantId = process.env.EWS_TENANT_ID ?? ''; const exchangeUrl = process.env.EWS_URL ?? 'https://outlook.office365.com/EWS/Exchange.asmx'; async function main() { if (!clientId || !clientSecret || !tenantId) { console.error('Missing EWS_CLIENT_ID, EWS_CLIENT_SECRET, or EWS_TENANT_ID environment variables.'); return; } try { const oAuthHelper = new EwsOAuthHelper({ clientId, clientSecret, tenantId }); console.log('Attempting to get application access token...'); const token = await oAuthHelper.getAppAccessToken(); console.log('Successfully obtained access token. Expires in:', token.expiresIn); const ews = new ExchangeService(ExchangeVersion.Exchange2016); ews.Url = exchangeUrl; // Set your EWS endpoint URL ews.Credentials = new OAuthCredentials(token.accessToken); // Example: Find the Inbox folder // You might need to refresh the token if it expires during long-running operations. // A typical pattern is to wrap EWS calls in a function that checks token validity. // const wellKnownFolderName = new WellKnownFolderName(WellKnownFolderName.Inbox); // const findFoldersResults = await ews.FindFolders(wellKnownFolderName, new FolderView(10)); // console.log('Found Inbox folder:', findFoldersResults.Folders[0].DisplayName); console.log('ExchangeService initialized with OAuth credentials. Ready for EWS operations.'); // Placeholder for actual EWS operations, e.g., finding items or sending emails. // await ews.FindItems(WellKnownFolderName.Inbox, new ItemView(10)); } catch (error) { console.error('Error during EWS operation:', error); if (error instanceof Error) { console.error('Error message:', error.message); } } } main().catch(console.error);