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Program.cs
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Program.cs
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using System.Globalization;
using System.IdentityModel.Tokens.Jwt;
using System.Security.Claims;
using Elsa;
using Elsa.ActivityDefinitions.EntityFrameworkCore.Extensions;
using Elsa.ActivityDefinitions.EntityFrameworkCore.Sqlite;
using Elsa.Extensions;
using Elsa.Http;
using Elsa.Http.Extensions;
using Elsa.JavaScript.Activities;
using Elsa.JavaScript.Extensions;
using Elsa.Jobs.Activities.Extensions;
using Elsa.Jobs.Activities.Implementations;
using Elsa.Jobs.Activities.Services;
using Elsa.Labels.EntityFrameworkCore.Extensions;
using Elsa.Labels.EntityFrameworkCore.Sqlite;
using Elsa.Labels.Extensions;
using Elsa.Liquid.Extensions;
using Elsa.Scheduling.Extensions;
using Elsa.WorkflowContexts.Extensions;
using Elsa.Workflows.Api.Extensions;
using Elsa.Workflows.Core.Activities;
using Elsa.Workflows.Core.Activities.Flowchart.Activities;
using Elsa.Workflows.Core.Pipelines.WorkflowExecution.Components;
using Elsa.Workflows.Management.Extensions;
using Elsa.Workflows.Management.Services;
using Elsa.Workflows.Persistence.EntityFrameworkCore.Extensions;
using Elsa.Workflows.Persistence.EntityFrameworkCore.Sqlite;
using Elsa.Workflows.Persistence.Extensions;
using Elsa.Workflows.Runtime.Extensions;
using Elsa.WorkflowServer.Web.Jobs;
using FastEndpoints;
using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.IdentityModel.Tokens;
var builder = WebApplication.CreateBuilder(args);
var services = builder.Services;
EndpointSecurityOptions.DisableSecurity();
// Add Elsa services.
services
.AddElsa(elsa => elsa
.UseManagement(management => management
.AddActivity<WriteLine>()
.AddActivity<ReadLine>()
.AddActivity<If>()
.AddActivity<HttpEndpoint>()
.AddActivity<WriteHttpResponse>()
.AddActivity<Flowchart>()
.AddActivity<FlowDecision>()
.AddActivity<FlowSwitch>()
.AddActivity<Elsa.Scheduling.Activities.Delay>()
.AddActivity<Elsa.Scheduling.Activities.Timer>()
.AddActivity<ForEach>()
.AddActivity<Switch>()
.AddActivity<RunJavaScript>()
.AddActivity<Event>()
)
.UseJobActivities()
.UseScheduling()
.UseWorkflowPersistence(p => p.UseEntityFrameworkCore(ef => ef.UseSqlite()))
.UseWorkflowApiEndpoints()
.UseJavaScript()
.UseLiquid()
.UseLabels(labels => labels.UseEntityFrameworkCore(ef => ef.UseSqlite()))
.UseCustomActivities(feature => feature.UseEntityFrameworkCore(ef => ef.UseSqlite()))
.UseHttp()
);
services.AddFastEndpoints();
services.AddHealthChecks();
services.AddCors(cors => cors.AddDefaultPolicy(policy => policy.AllowAnyHeader().AllowAnyMethod().AllowAnyOrigin()));
// Authentication & Authorization.
services
.AddAuthentication(JwtBearerDefaults.AuthenticationScheme)
.AddJwtBearer(JwtBearerDefaults.AuthenticationScheme, options =>
{
var claims =
options.TokenValidationParameters = new TokenValidationParameters
{
IssuerSigningKeyValidator = (key, token, parameters) => true,
ValidateIssuerSigningKey = false,
ValidateAudience = false,
ValidateIssuer = false,
ValidateTokenReplay = false,
ValidateActor = false,
RoleClaimType = ClaimTypes.Role,
TokenReplayValidator = (time, token, parameters) => true,
SignatureValidator = (token, parameters) =>
{
return new JwtSecurityToken(token);
},
};
options.SecurityTokenValidators.Clear();
options.SecurityTokenValidators.Add(new CustomValidator());
});
services.AddAuthorization(options => options.AddPolicy("WorkflowManagerPolicy", policy => policy.RequireAuthenticatedUser()));
// Configure middleware pipeline.
var app = builder.Build();
var serviceProvider = app.Services;
// Register a dummy job for demo purposes.
var jobRegistry = serviceProvider.GetRequiredService<IJobRegistry>();
jobRegistry.Add(typeof(IndexBlockchainJob));
// Update activity providers.
var activityRegistryPopulator = serviceProvider.GetRequiredService<IActivityRegistryPopulator>();
activityRegistryPopulator.PopulateRegistryAsync(typeof(JobActivityProvider));
// Configure workflow engine execution pipeline.
serviceProvider.ConfigureDefaultWorkflowExecutionPipeline(pipeline =>
pipeline
.UseWorkflowExecutionEvents()
.UseWorkflowExecutionLogPersistence()
.UsePersistence()
.UseWorkflowContexts()
.UseStackBasedActivityScheduler()
);
if (app.Environment.IsDevelopment())
app.UseDeveloperExceptionPage();
// CORS.
app.UseCors();
// Health checks.
app.MapHealthChecks("/");
app.UseAuthentication();
app.UseAuthorization();
// Register Elsa middleware.
app.UseElsaFastEndpoints();
app.UseJsonSerializationErrorHandler();
app.UseHttpActivities();
// Run.
app.Run();
public class CustomValidator : ISecurityTokenValidator
{
private readonly JwtSecurityTokenHandler _tokenHandler;
public CustomValidator()
{
_tokenHandler = new JwtSecurityTokenHandler();
}
public bool CanReadToken(string securityToken)
{
return true;
}
public ClaimsPrincipal ValidateToken(string securityToken, TokenValidationParameters validationParameters, out SecurityToken validatedToken)
{
var principal = _tokenHandler.ValidateToken(securityToken, validationParameters, out validatedToken);
return principal;
}
public bool CanValidateToken => true;
public int MaximumTokenSizeInBytes { get; set; } = TokenValidationParameters.DefaultMaximumTokenSizeInBytes;
}