Encounter 401 authentication via MS graph API, to accomplish send a mail / scheduling a meeting

最新推荐文章于 2024-07-09 09:47:08 发布

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tony-nf.peng

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本文介绍了解决在使用Microsoft Graph API发送邮件时遇到的401身份验证问题的方法。通过获取访问令牌，应用应用程序权限，并确保Office 365帐户拥有必要的许可证，实现了邮件发送功能。

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Encounter 401 authentication issue, to accomplish send a mail / scheduling a meeting via MS graph api

get access token via this link:https://dzone.com/articles/getting-access-token-for-microsoft-graph-using-oau


var authUrl = "https://login.microsoft.com";
				var appId = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
				var appSecret = HttpUtility.UrlEncode("xxxxxxxxxxxxxxxxxxxxx");
				var tenantId = "xxxxxxxxxxxxxxxxxxx";

				var client = new HttpClient();
				var request = new HttpRequestMessage(HttpMethod.Post,
					$"{authUrl}/{tenantId}/oauth2/token");
				var bodyStr =
					$"grant_type=client_credentials&appId={appId}&resource={HttpUtility.UrlEncode("https://graph.microsoft.com")}&client_secret={appSecret}";
				var body = new StringContent(bodyStr);
				body.Headers.ContentType.MediaType = "application/x-www-form-urlencoded";
				request.Content = body;
				var getTokenResult = client.SendAsync(request).Result.Content.ReadAsStringAsync().Result;
				try
				{
					token = JObject.Parse(getTokenResult)["access_token"].ToString();
				}
				catch (Exception /*ex*/)
				{
					throw new Exception(getTokenResult);
				}

appId, appSecret, tenantId, please refer to the link https://dzone.com/articles/getting-access-token-for-microsoft-graph-using-oau

Call ms graph api


using (var client = new HttpClient())
				{
					//var mail = authContext.ConversationData.GetValue<SendAMail>("SendAMail");
					var jsonMail = JsonConvert.SerializeObject(mail);
					var content = new StringContent(jsonMail, Encoding.UTF8, "application/json");
					client.DefaultRequestHeaders.Add("Authorization", "Bearer " + _token);
					client.DefaultRequestHeaders.Add("Accept", "application/json");

					using (
						var response =
						await
								client.PostAsync("https://graph.microsoft.com/v1.0/users/xxxx@dd.com/sendMail/", content))
					{
						string replyMsg;
						if (response.IsSuccessStatusCode)
							// replyMsg = "Done";
							replyMsg = NLS.Mctwo_TXT_MailDialog_Done;
						else
							//replyMsg = "I am sorry, I cannot connect to authorization server, email cannot be sent.";
							replyMsg = NLS.Mctwo_TXT_MailDialog_IASNC;

						await context.PostAsync(replyMsg);
					}
				}

Here, I apply the application permission, so that https://graph.microsoft.com/v1.0/users/xxxx@dd.com/sendMail/. the url contains users/o365 mail address. If you can apply delegate permission, it should be like this:https://graph.microsoft.com/v1.0/me/sendMail/

conclusion:

https://dzone.com/articles/getting-access-token-for-microsoft-graph-using-oau to grant ms graph permission
Your test office 365 account must own the license.or you are one owner of your application in Azure.However this application was created by o365 license account.
because I apply the application permission to execute MS graph api which requres Admin account to grant permission one time.