ImageResizer and ASP.NET Core Web Application (.NET Framework) - imageresizer

Question

Where can I find a full sample of an ImageResizer (ImageResizing.net) standalone website based on ASP.NET Core Web Application (.NET Framework) ?
"frameworks": {
"net461": { }
},

Answer 1

Here's a working PoC that simulates what ImageResizer + AzureReader2 do.
Startup.cs
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
namespace ImageResizerSvc
{
public class Startup
{
// This method gets called by the runtime. Use this method to add services to the container.
// For more information on how to configure your application, visit https://go.microsoft.com/fwlink/?LinkID=398940
public void ConfigureServices(IServiceCollection services)
{
services.AddMvc();
services.AddSingleton(x =>
{
var config = new ImageResizer.Configuration.Config();
// install plugins, e.g.
// new PrettyGifs().Install(config);
return config;
});
}
// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
{
loggerFactory.AddConsole();
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
app.UseMvc(routes =>
{
routes.MapRoute("default", "{controller=Home}/{action=Index}/{id?}");
routes.MapRoute("imageresizer", "{*path}",
defaults: new { controller = "Images", action = "Resizer" });
});
}
}
}
ImagesController.cs
using ImageResizer;
using Microsoft.AspNetCore.Mvc;
using Microsoft.WindowsAzure.Storage;
using System;
using System.IO;
using System.Net;
using System.Threading.Tasks;
namespace ImageResizerSvc.Controllers
{
public class ImagesController : Controller
{
private readonly ImageResizer.Configuration.Config _imageResizerConfig;
public ImagesController(ImageResizer.Configuration.Config imageResizerConfig)
{
_imageResizerConfig = imageResizerConfig ?? throw new ArgumentNullException(nameof(imageResizerConfig));
}
public async Task<IActionResult> Resizer()
{
// Init storage account
var connectionString = "UseDevelopmentStorage=true";
CloudStorageAccount.TryParse(connectionString, out CloudStorageAccount cloudStorageAccount);
var cloudBlobClient = cloudStorageAccount.CreateCloudBlobClient();
// Get blob ref
var storagePath = cloudBlobClient.BaseUri.ToString().TrimEnd('/', '\\');
var blobPath = Request.Path.Value.Trim('/', '\\');
var blobUri = new Uri($"{storagePath}/{blobPath}");
using (var sourceStream = new MemoryStream(4096))
{
try
{
var blob = await cloudBlobClient.GetBlobReferenceFromServerAsync(blobUri);
await blob.DownloadToStreamAsync(sourceStream);
sourceStream.Seek(0, SeekOrigin.Begin);
}
catch (StorageException e)
{
// Pass to client
if (Enum.IsDefined(typeof(HttpStatusCode), e.RequestInformation.HttpStatusCode))
{
return StatusCode(e.RequestInformation.HttpStatusCode, e.RequestInformation.HttpStatusMessage);
}
throw;
}
var destinationStream = new MemoryStream(4096);
var instructions = new Instructions(Request.QueryString.Value);
var imageJob = _imageResizerConfig.Build(new ImageJob(sourceStream, destinationStream, instructions));
destinationStream.Seek(0, SeekOrigin.Begin);
return File(destinationStream, imageJob.ResultMimeType);
}
}
}
}
Then you can use it by going to http://localhost/{container}/{blobPath.ext}?{imageResizer_queryString}

Answer 2

Imageflow.NET Server is the .NET Core equivalent to ImageResizer, but is much faster and produces much smaller image files. See https://github.com/imazen/imageflow-dotnet-server
If you want to do your own middleware, use Imageflow.NET directly. See https://github.com/imazen/imageflow-dotnet
[Disclaimer: I am the author of both ImageResizer and Imageflow]