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Empezar.Cloud 2.2.21

Empezar.Cloud

Cloud service encapsulating AWS, GCP & Azure for your application to be truly Cloud agnostic.

Installation

Install the nuget package for Empezar.Cloud in your API Project.

You can also use Manager Nuget Packages to install the same.

dotnet add package Empezar.Cloud

Usage

Register the cloud service in Program.cs of API project

builder.Services.RegisterCloudService(builder.Configuration["EZRBlazorWebAPI:Cloud:Type"]!,
	builder.Configuration["EZRBlazorWebAPI:Cloud:BucketName"]!,
	builder.Configuration.GetSection("EZRBlazorWebAPI:Cloud:AllowedFileTypes").Get<string[]>()!.ToImmutableHashSet(StringComparer.InvariantCultureIgnoreCase),
	builder.Configuration["EZRBlazorWebAPI:Cloud:AzureBlobConnection"]);

Configurations can be done in appSettings.config or environment valriables as shown below Valid Type = AWS/GCP/Azure/DEV

"EZRBlazorWebAPI": {
	"Cloud": {
		"Type": "AWS",
		"BucketName": "YourBucketName",
		"AllowedFileTypes": [ "docx", "xlsx", "csv", "pdf", "jpeg", "jpg", "png", "zip" ]
	}
}

OR

export EZRBlazorWebAPI__Cloud__Type="AWS"
export EZRBlazorWebAPI__Cloud__AzureBlobConnection="YourConnectionString"

You can now inject ICloudService cloudService in your class or method.

async (CloudFile uploadDoc, [FromHeader(Name = BaseHeaderConstants.XSource)] string source, 
	ICloudService cloudService, CancellationToken token) =>
{
	if (uploadDoc.file == null) return Results.BadRequest(new ProblemDetails { Detail = "File not found" });
	else
	{
		var fileExtn = Empezar.Cloud.Program.GetFileExtention(uploadDoc.file);
		if (fileExtn == null) return Results.BadRequest(new ProblemDetails { Detail = "Unsupported file type" });
		if (uploadValidator.Invoke(caller, source, fileExtn, uploadDoc.file.Length / (1024.0 * 1024.0)))
			return Results.Ok(await cloudService.UploadDocument(uploadDoc.file, uploadDoc.contenttype, token));
		else
			return Results.BadRequest(new ProblemDetails { Detail = "Unsupported file type or size exceeds the limit" });
	}
}

static bool UploadValidator(ClaimsPrincipal caller, string source, string extention, double size)
{
	var roles = caller.FindAll(ClaimTypes.Role).Select(x => x.Value);
	bool isValid = false;
	switch (source)
	{
		case "source1":
			IEnumerable<string> source1FileTypes = FileTypes.GetFileTypes<FileTypes.DocTypes>();
			isValid = (roles.Contains("admin") && source1FileTypes.Contains(extention, StringComparer.InvariantCultureIgnoreCase) && size <= 5);
			break;
		case "source2":
			IEnumerable<string> source2FileTypes = FileTypes.GetFileTypes<FileTypes.ImageTypes>();
			isValid = (source2FileTypes.Contains(extention, StringComparer.InvariantCultureIgnoreCase) && size <= 1);
			break;
	}
	return isValid;
}

To Download or Delete file, you can use

async (string key, ICloudService cloudService, CancellationToken token) =>
	await cloudService.DownloadDocument(Uri.UnescapeDataString(key), token)
	
async (string key, ICloudService cloudService, CancellationToken token) =>
	await cloudService.DeleteDocument(Uri.UnescapeDataString(key), token)

The service implements MimeDetective package which will provide easy extention methods on your byte[] to validate MIME Type and File Extentions using magic bytes.

//Gets actual MIME Type
uploadDoc.file.GetMimeType()

//Gets actual File Extention
uploadDoc.file.GetFileExtention()

License

MIT