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media upload

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john 2025-05-04 21:46:24 +02:00
parent befaa207d7
commit 0d7da2ea85
33 changed files with 257 additions and 353 deletions
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62
Femto.Modules.Media/Infrastructure/FilesystemStorageProvider.cs Normal file
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using Femto.Modules.Media.Data;
namespace Femto.Modules.Media.Infrastructure;
internal class FilesystemStorageProvider : IStorageProvider
{
private readonly string _storageRoot;
public FilesystemStorageProvider(string storageRoot)
{
if (string.IsNullOrWhiteSpace(storageRoot))
throw new ArgumentException(
"Storage root cannot be null or empty.",
nameof(storageRoot)
);
this._storageRoot = Path.GetFullPath(storageRoot);
if (!Directory.Exists(this._storageRoot))
{
Directory.CreateDirectory(this._storageRoot);
}
}
public async Task SaveBlob(string id, Stream data)
{
string filePath = this.GetSafeFilePath(id);
// Ensure the directory exists
Directory.CreateDirectory(Path.GetDirectoryName(filePath)!);
await using var fileStream = new FileStream(filePath, FileMode.Create, FileAccess.Write);
await data.CopyToAsync(fileStream);
}
public async Task<Stream> LoadBlob(string id)
{
string filePath = this.GetSafeFilePath(id);
if (!File.Exists(filePath))
throw new FileNotFoundException("The blob with the specified ID was not found.", id);
Stream fileStream = new FileStream(filePath, FileMode.Open, FileAccess.Read);
return fileStream;
}
private string GetSafeFilePath(string id)
{
if (string.IsNullOrWhiteSpace(id))
throw new ArgumentException("Blob ID cannot be null or empty.", nameof(id));
// Sanitize and validate the path
string combinedPath = Path.Combine(this._storageRoot, id);
string fullPath = Path.GetFullPath(combinedPath);
if (!fullPath.StartsWith(this._storageRoot, StringComparison.Ordinal))
throw new UnauthorizedAccessException("Access to the path is denied.");
return fullPath;
}
}

7
Femto.Modules.Media/Infrastructure/IStorageProvider.cs Normal file
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namespace Femto.Modules.Media.Infrastructure;
internal interface IStorageProvider
{
Task SaveBlob(string id, Stream data);
Task<Stream> LoadBlob(string id);
}

78
Femto.Modules.Media/Infrastructure/Integration/Mailman.cs
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using System.Text.Json;
using Femto.Modules.Media.Data;
using MediatR;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;
namespace Femto.Modules.Media.Infrastructure.Integration;
internal class Mailman(Outbox outbox, MediaContext context, ILogger<Mailman> logger, IMediator mediator)
: BackgroundService
{
protected override async Task ExecuteAsync(CancellationToken cancellationToken)
{
var timeToWait = TimeSpan.FromSeconds(1);
while (!cancellationToken.IsCancellationRequested)
{
try
{
await this.DeliverMail(cancellationToken);
}
catch (Exception e)
{
logger.LogError(e, "Error while processing outbox");
}
try
{
await Task.Delay(timeToWait, cancellationToken);
}
catch (TaskCanceledException)
{
break;
}
}
}
private async Task DeliverMail(CancellationToken cancellationToken)
{
var messages = await outbox.GetPendingMessages(cancellationToken);
foreach (var message in messages)
{
try
{
var notificationType = OutboxMessageTypeRegistry.GetType(message.EventType);
if (notificationType is null)
{
logger.LogWarning("unmapped event type {Type}. skipping.", message.EventType);
continue;
}
var notification =
JsonSerializer.Deserialize(message.Payload, notificationType) as INotification;
if (notification is null)
throw new Exception("notification is null");
await mediator.Publish(notification, cancellationToken);
message.Succeed();
}
catch (Exception e)
{
logger.LogError(
e,
"Error processing event {EventId} for aggregate {AggregateId}",
message.Id,
message.AggregateId
);
message.Fail(e.ToString());
}
await context.SaveChangesAsync(cancellationToken);
}
}
}

34
Femto.Modules.Media/Infrastructure/Integration/Outbox.cs
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@ -1,34 +0,0 @@
using System.Text.Json;
using Femto.Common.Integration;
using Femto.Modules.Media.Data;
using Microsoft.EntityFrameworkCore;
namespace Femto.Modules.Media.Infrastructure.Integration;
internal class Outbox(MediaContext context)
{
public async Task AddMessage<TMessage>(Guid aggregateId, TMessage message, CancellationToken cancellationToken)
where TMessage : IIntegrationEvent
{
await context.Outbox.AddAsync(
new(
message.EventId,
aggregateId,
typeof(TMessage).Name,
JsonSerializer.Serialize(message)
),
cancellationToken
);
}
public async Task<IEnumerable<OutboxEntry>> GetPendingMessages(CancellationToken cancellationToken)
{
var now = DateTime.UtcNow;
return await context
.Outbox.Where(message => message.Status == OutboxEntryStatus.Pending)
.Where(message => message.NextRetryAt == null || message.NextRetryAt <= now)
.OrderBy(message => message.CreatedAt)
.ToListAsync(cancellationToken);
}
}

59
Femto.Modules.Media/Infrastructure/Integration/OutboxEntry.cs
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@ -1,59 +0,0 @@
namespace Femto.Modules.Media.Infrastructure.Integration;
internal class OutboxEntry
{
private const int MaxRetries = 5;
public Guid Id { get; private set; }
public string EventType { get; private set; } = null!;
public Guid AggregateId { get; private set; }
public string Payload { get; private set; } = null!;
public DateTime CreatedAt { get; private set; }
public DateTime? ProcessedAt { get; private set; }
public DateTime? NextRetryAt { get; private set; }
public int RetryCount { get; private set; } = 0;
public string? LastError { get; private set; }
public OutboxEntryStatus Status { get; private set; }
private OutboxEntry() { }
public OutboxEntry(Guid eventId, Guid aggregateId, string eventType, string payload)
{
this.Id = eventId;
this.EventType = eventType;
this.AggregateId = aggregateId;
this.Payload = payload;
this.CreatedAt = DateTime.UtcNow;
}
public void Succeed()
{
this.ProcessedAt = DateTime.UtcNow;
this.Status = OutboxEntryStatus.Completed;
}
public void Fail(string error)
{
if (this.RetryCount >= MaxRetries)
{
this.Status = OutboxEntryStatus.Failed;
}
else
{
this.LastError = error;
this.NextRetryAt = DateTime.UtcNow.AddSeconds(Math.Pow(2, this.RetryCount));
this.RetryCount++;
}
}
}
public enum OutboxEntryStatus
{
Pending,
Completed,
Failed
}

35
Femto.Modules.Media/Infrastructure/Integration/OutboxMessageTypeRegistry.cs
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using System.Collections.Concurrent;
using System.Reflection;
using Femto.Common.Attributes;
using MediatR;
namespace Femto.Modules.Media.Infrastructure.Integration;
internal static class OutboxMessageTypeRegistry
{
private static readonly ConcurrentDictionary<string, Type> Mapping = new();
public static void RegisterOutboxMessageTypesInAssembly(Assembly assembly)
{
var types = assembly.GetTypes();
foreach (var type in types)
{
if (!typeof(INotification).IsAssignableFrom(type) || type.IsAbstract || type.IsInterface)
continue;
var attribute = type.GetCustomAttribute<EventTypeAttribute>();
if (attribute == null)
continue;
var eventName = attribute.Name;
if (!string.IsNullOrWhiteSpace(eventName))
{
Mapping.TryAdd(eventName, type);
}
}
}
public static Type? GetType(string eventName) => Mapping.GetValueOrDefault(eventName);
}

36
Femto.Modules.Media/Infrastructure/PipelineBehaviours/DomainEventsPipelineHandler.cs
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using Femto.Common.Domain;
using Femto.Modules.Media.Data;
using MediatR;
namespace Femto.Modules.Media.Infrastructure.PipelineBehaviours;
internal class DomainEventsPipelineBehaviour<TRequest, TResponse>(
MediaContext context,
IPublisher publisher) : IPipelineBehavior<TRequest, TResponse>
where TRequest : notnull
{
public async Task<TResponse> Handle(
TRequest request,
RequestHandlerDelegate<TResponse> next,
CancellationToken cancellationToken)
{
var response = await next(cancellationToken);
var domainEvents = context.ChangeTracker
.Entries<Entity>()
.SelectMany(e =>
{
var events = e.Entity.DomainEvents;
e.Entity.ClearDomainEvents();
return events;
})
.ToList();
foreach (var domainEvent in domainEvents)
{
await publisher.Publish(domainEvent, cancellationToken);
}
return response;
}
}

23
Femto.Modules.Media/Infrastructure/PipelineBehaviours/SaveChangesPipelineBehaviour.cs
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using Femto.Modules.Media.Data;
using MediatR;
namespace Femto.Modules.Media.Infrastructure.PipelineBehaviours;
/// <summary>
/// automatically call unit of work after all requuests
/// </summary>
internal class SaveChangesPipelineBehaviour<TRequest, TResponse>(MediaContext context)
: IPipelineBehavior<TRequest, TResponse> where TRequest : notnull
{
public async Task<TResponse> Handle(
TRequest request,
RequestHandlerDelegate<TResponse> next,
CancellationToken cancellationToken
)
{
var response = await next(cancellationToken);
if (context.ChangeTracker.HasChanges())
await context.SaveChangesAsync(cancellationToken);
return response;
}
}