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/*
* Copyright (c) 2023 Vaughn Nugent
*
* Library: VNLib
* Package: Emails.Transactional
* File: MinioStorage.cs
*
* MinioStorage.cs is part of Emails.Transactional which is part of the larger
* VNLib collection of libraries and utilities.
*
* Emails.Transactional is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published
* by the Free Software Foundation, either version 2 of the License,
* or (at your option) any later version.
*
* Emails.Transactional is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Emails.Transactional. If not, see http://www.gnu.org/licenses/.
*/
using System.IO;
using System.Threading;
using System.Threading.Tasks;
using VNLib.Utils.IO;
using VNLib.Utils.Memory;
using VNLib.Utils.Logging;
using VNLib.Utils.Extensions;
using VNLib.Plugins;
using VNLib.Plugins.Extensions.Loading;
using Minio;
using Minio.Handlers;
using Minio.DataModel;
using Minio.DataModel.Args;
using Minio.DataModel.Tracing;
namespace Emails.Transactional
{
[ConfigurationName("s3_config")]
internal sealed class MinioStorage : ISimpleFilesystem, IAsyncConfigurable
{
private readonly MinioClient Client;
private readonly S3Config Config;
public MinioStorage(PluginBase plugin, IConfigScope s3Config)
{
//Deserialize the config
Config = s3Config.Deserialze<S3Config>();
Client = new();
Client.WithEndpoint(Config.ServerAddress)
.WithSSL(Config.UseSsl.HasValue && Config.UseSsl.Value)
.WithTimeout(10 * 1000);
//Accept optional region
if (!string.IsNullOrWhiteSpace(Config.Region))
{
Client.WithRegion(Config.Region);
}
//Setup debug trace
if (plugin.IsDebug())
{
Client.SetTraceOn(new ReqLogger(plugin.Log));
}
}
public string GetExternalFilePath(string filePath)
{
string path = Path.Combine(Config.BaseBucket!, filePath);
//force forward only slashes
return path.Replace('\\', '/');
}
///<inheritdoc/>
public async Task ConfigureServiceAsync(PluginBase plugin)
{
using ISecretResult? secret = await plugin.GetSecretAsync("s3_secret");
//Build client
Client.WithCredentials(Config.ClientId, secret.Result.ToString())
.Build();
}
///<inheritdoc/>
public Task DeleteFileAsync(string filePath, CancellationToken cancellation)
{
string fullPath = GetExternalFilePath(filePath);
RemoveObjectArgs args = new();
args.WithBucket(Config.BaseBucket)
.WithObject(fullPath);
//Remove the object
return Client.RemoveObjectAsync(args, cancellation);
}
///<inheritdoc/>
public Task WriteFileAsync(string filePath, Stream data, string ct, CancellationToken cancellation)
{
string fullPath = GetExternalFilePath(filePath);
PutObjectArgs args = new();
args.WithBucket(Config.BaseBucket)
.WithContentType(ct)
.WithObject(fullPath)
.WithObjectSize(data.Length)
.WithStreamData(data);
//Upload the object
return Client.PutObjectAsync(args, cancellation);
}
///<inheritdoc/>
public async Task<long> ReadFileAsync(string filePath, Stream output, CancellationToken cancellation)
{
string fullPath = GetExternalFilePath(filePath);
//Get the item
GetObjectArgs args = new();
args.WithBucket(Config.BaseBucket)
.WithObject(fullPath)
.WithCallbackStream(async (stream, cancellation) =>
{
//Read the objec to memory
await stream.CopyToAsync(output, 4096, MemoryUtil.Shared, cancellation);
});
try
{
//Get the post content file
ObjectStat stat = await Client.GetObjectAsync(args, cancellation);
}
catch (Minio.Exceptions.ObjectNotFoundException)
{
//File not found
return -1;
}
return output.Position;
}
internal class ReqLogger : IRequestLogger
{
private readonly ILogProvider logProvider;
public ReqLogger(ILogProvider log)
{
logProvider = log;
}
public void LogRequest(RequestToLog requestToLog, ResponseToLog responseToLog, double durationMs)
{
logProvider.Debug("S3 result\n{method} {uri} HTTP {ms}ms\nHTTP {status} {message}\n{content}",
requestToLog.Method, requestToLog.Resource, durationMs,
responseToLog.StatusCode, responseToLog.ErrorMessage, responseToLog.Content
);
}
}
}
}
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