Microsoft Azure Webjobs Extensions Authentication Events Dotnet

using Microsoft.Azure.WebJobs;using Microsoft.Azure.WebJobs.Extensions.AuthenticationEvents;using Microsoft.Azure.WebJobs.Extensions.AuthenticationEvents.TokenIssuanceStart;using Microsoft.Extensions.Logging;
public static class TokenEnrichmentFunction{    [FunctionName("OnTokenIssuanceStart")]    public static WebJobsAuthenticationEventResponse Run(        [WebJobsAuthenticationEventsTrigger] WebJobsTokenIssuanceStartRequest request,        ILogger log)    {        log.LogInformation("Token issuance event for user: {UserId}",             request.Data?.AuthenticationContext?.User?.Id);
        // Create response with custom claims        var response = new WebJobsTokenIssuanceStartResponse();                // Add claims to the token        response.Actions.Add(new WebJobsProvideClaimsForToken        {            Claims = new Dictionary<string, string>            {                { "customClaim1", "customValue1" },                { "department", "Engineering" },                { "costCenter", "CC-12345" },                { "apiVersion", "v2" }            }        });
        return response;    }}

using Microsoft.Azure.WebJobs;using Microsoft.Azure.WebJobs.Extensions.AuthenticationEvents;using Microsoft.Azure.WebJobs.Extensions.AuthenticationEvents.TokenIssuanceStart;using Microsoft.Extensions.Logging;using System.Net.Http;using System.Text.Json;
public static class TokenEnrichmentWithExternalData{    private static readonly HttpClient _httpClient = new();
    [FunctionName("OnTokenIssuanceStartExternal")]    public static async Task<WebJobsAuthenticationEventResponse> Run(        [WebJobsAuthenticationEventsTrigger] WebJobsTokenIssuanceStartRequest request,        ILogger log)    {        string? userId = request.Data?.AuthenticationContext?.User?.Id;                if (string.IsNullOrEmpty(userId))        {            log.LogWarning("No user ID in request");            return new WebJobsTokenIssuanceStartResponse();        }
        // Fetch user data from external API        var userProfile = await GetUserProfileAsync(userId);                var response = new WebJobsTokenIssuanceStartResponse();        response.Actions.Add(new WebJobsProvideClaimsForToken        {            Claims = new Dictionary<string, string>            {                { "employeeId", userProfile.EmployeeId },                { "department", userProfile.Department },                { "roles", string.Join(",", userProfile.Roles) }            }        });
        return response;    }
    private static async Task<UserProfile> GetUserProfileAsync(string userId)    {        var response = await _httpClient.GetAsync($"https://api.example.com/users/{userId}");        response.EnsureSuccessStatusCode();        var json = await response.Content.ReadAsStringAsync();        return JsonSerializer.Deserialize<UserProfile>(json)!;    }}
public record UserProfile(string EmployeeId, string Department, string[] Roles);

using Microsoft.Azure.WebJobs;using Microsoft.Azure.WebJobs.Extensions.AuthenticationEvents;using Microsoft.Azure.WebJobs.Extensions.AuthenticationEvents.Framework;using Microsoft.Extensions.Logging;
public static class AttributeCollectionStartFunction{    [FunctionName("OnAttributeCollectionStart")]    public static WebJobsAuthenticationEventResponse Run(        [WebJobsAuthenticationEventsTrigger] WebJobsAttributeCollectionStartRequest request,        ILogger log)    {        log.LogInformation("Attribute collection start for correlation: {CorrelationId}",            request.Data?.AuthenticationContext?.CorrelationId);
        var response = new WebJobsAttributeCollectionStartResponse();
        // Option 1: Continue with default behavior        response.Actions.Add(new WebJobsContinueWithDefaultBehavior());
        // Option 2: Prefill attributes        // response.Actions.Add(new WebJobsSetPrefillValues        // {        //     Attributes = new Dictionary<string, string>        //     {        //         { "city", "Seattle" },        //         { "country", "USA" }        //     }        // });
        // Option 3: Show blocking page (prevent sign-up)        // response.Actions.Add(new WebJobsShowBlockPage        // {        //     Message = "Sign-up is currently disabled."        // });
        return response;    }}

using Microsoft.Azure.WebJobs;using Microsoft.Azure.WebJobs.Extensions.AuthenticationEvents;using Microsoft.Azure.WebJobs.Extensions.AuthenticationEvents.Framework;using Microsoft.Extensions.Logging;
public static class AttributeCollectionSubmitFunction{    [FunctionName("OnAttributeCollectionSubmit")]    public static WebJobsAuthenticationEventResponse Run(        [WebJobsAuthenticationEventsTrigger] WebJobsAttributeCollectionSubmitRequest request,        ILogger log)    {        var response = new WebJobsAttributeCollectionSubmitResponse();
        // Access submitted attributes        var attributes = request.Data?.UserSignUpInfo?.Attributes;                string? email = attributes?["email"]?.ToString();        string? displayName = attributes?["displayName"]?.ToString();
        // Validation example: block certain email domains        if (email?.EndsWith("@blocked.com") == true)        {            response.Actions.Add(new WebJobsShowBlockPage            {                Message = "Sign-up from this email domain is not allowed."            });            return response;        }
        // Validation example: show validation error        if (string.IsNullOrEmpty(displayName) || displayName.Length < 3)        {            response.Actions.Add(new WebJobsShowValidationError            {                Message = "Display name must be at least 3 characters.",                AttributeErrors = new Dictionary<string, string>                {                    { "displayName", "Name is too short" }                }            });            return response;        }
        // Modify attributes before saving        response.Actions.Add(new WebJobsModifyAttributeValues        {            Attributes = new Dictionary<string, string>            {                { "displayName", displayName.Trim() },                { "city", attributes?["city"]?.ToString()?.ToUpperInvariant() ?? "" }            }        });
        return response;    }}

using Microsoft.Azure.WebJobs;using Microsoft.Azure.WebJobs.Extensions.AuthenticationEvents;using Microsoft.Azure.WebJobs.Extensions.AuthenticationEvents.Framework;using Microsoft.Extensions.Logging;
public static class CustomOtpFunction{    [FunctionName("OnOtpSend")]    public static async Task<WebJobsAuthenticationEventResponse> Run(        [WebJobsAuthenticationEventsTrigger] WebJobsOnOtpSendRequest request,        ILogger log)    {        var response = new WebJobsOnOtpSendResponse();
        string? phoneNumber = request.Data?.OtpContext?.Identifier;        string? otp = request.Data?.OtpContext?.OneTimeCode;
        if (string.IsNullOrEmpty(phoneNumber) || string.IsNullOrEmpty(otp))        {            log.LogError("Missing phone number or OTP");            response.Actions.Add(new WebJobsOnOtpSendFailed            {                Error = "Missing required data"            });            return response;        }
        try        {            // Send OTP via your SMS provider            await SendSmsAsync(phoneNumber, $"Your verification code is: {otp}");                        response.Actions.Add(new WebJobsOnOtpSendSuccess());            log.LogInformation("OTP sent successfully to {PhoneNumber}", phoneNumber);        }        catch (Exception ex)        {            log.LogError(ex, "Failed to send OTP");            response.Actions.Add(new WebJobsOnOtpSendFailed            {                Error = "Failed to send verification code"            });        }
        return response;    }
    private static async Task SendSmsAsync(string phoneNumber, string message)    {        // Implement your SMS provider integration (Twilio, Azure Communication Services, etc.)        await Task.CompletedTask;    }}

// Program.cs (Isolated worker model)using Microsoft.Extensions.Hosting;
var host = new HostBuilder()    .ConfigureFunctionsWorkerDefaults()    .Build();
host.Run();

[FunctionName("OnTokenIssuanceStart")]public static WebJobsAuthenticationEventResponse Run(    [WebJobsAuthenticationEventsTrigger] WebJobsTokenIssuanceStartRequest request,    ILogger log){    try    {        // Your logic here        var response = new WebJobsTokenIssuanceStartResponse();        response.Actions.Add(new WebJobsProvideClaimsForToken        {            Claims = new Dictionary<string, string> { { "claim", "value" } }        });        return response;    }    catch (Exception ex)    {        log.LogError(ex, "Error processing token issuance event");                // Return empty response - authentication continues without custom claims        // Do NOT throw - this would fail the authentication        return new WebJobsTokenIssuanceStartResponse();    }}