Merge pull request #6 from mindcollapse/api

API for MalwareMultiScan

.dockerignore

@@ -1,4 +1,5 @@
 .git
+*.Dockerfile
 Dockerfile
 bin
 obj

.idea/.idea.MalwareMultiScan/.idea/runConfigurations/MalwareMultiScan_Scanner_Dockerfile.xml

@@ -1,5 +1,5 @@
 <component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="MalwareMultiScan.Worker/Dockerfile" type="docker-deploy" factoryName="dockerfile" server-name="Docker">
+  <configuration default="false" name="MalwareMultiScan.Scanner/Dockerfile" type="docker-deploy" factoryName="dockerfile" server-name="Docker">
     <deployment type="dockerfile">
       <settings>
         <option name="imageTag" value="mindcollapse/malware-multi-scan-worker" />
@@ -10,7 +10,7 @@
         <option name="contextFolderPath" value="." />
         <option name="entrypoint" value="" />
         <option name="commandLineOptions" value="" />
-        <option name="sourceFilePath" value="MalwareMultiScan.Worker/Dockerfile" />
+        <option name="sourceFilePath" value="MalwareMultiScan.Scanner/Dockerfile" />
       </settings>
     </deployment>
     <method v="2" />

MalwareMultiScan.Api/Attributes/IsHttpUrlAttribute.cs

@@ -0,0 +1,22 @@
+using System;
+using System.ComponentModel.DataAnnotations;
+
+namespace MalwareMultiScan.Api.Attributes
+{
+    /// <summary>
+    /// Validate URI to be an absolute http(s) URL.
+    /// </summary>
+    internal class IsHttpUrlAttribute : ValidationAttribute
+    {
+        /// <inheritdoc />
+        protected override ValidationResult IsValid(object value, ValidationContext validationContext)
+        {
+            if (!Uri.TryCreate((string)value, UriKind.Absolute, out var uri) 
+                || !uri.IsAbsoluteUri 
+                || uri.Scheme != "http" && uri.Scheme != "https")
+                return new ValidationResult("Only absolute http(s) URLs are supported");
+
+            return ValidationResult.Success;
+        }
+    }
+}

MalwareMultiScan.Api/Attributes/MaxFileSizeAttribute.cs

@@ -0,0 +1,28 @@
+using System.ComponentModel.DataAnnotations;
+using Microsoft.AspNetCore.Http;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+
+namespace MalwareMultiScan.Api.Attributes
+{
+    /// <summary>
+    /// Validate uploaded file size for the max file size defined in settings.
+    /// </summary>
+    public class MaxFileSizeAttribute : ValidationAttribute
+    {
+        /// <inheritdoc />
+        protected override ValidationResult IsValid(object value, ValidationContext validationContext)
+        {
+            var maxSize = validationContext
+                .GetRequiredService<IConfiguration>()
+                .GetValue<long>("MaxFileSize");
+            
+            var formFile = (IFormFile) value;
+            
+            if (formFile == null || formFile.Length > maxSize)
+                return new ValidationResult($"File exceeds the maximum size of {maxSize} bytes");
+            
+            return ValidationResult.Success;
+        }
+    }
+}

MalwareMultiScan.Api/Controllers/DownloadController.cs

@@ -0,0 +1,33 @@
+using System.Threading.Tasks;
+using MalwareMultiScan.Api.Services;
+using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.Mvc;
+
+namespace MalwareMultiScan.Api.Controllers
+{
+    [ApiController]
+    [Route("download")]
+    [Produces("application/octet-stream")]
+    public class DownloadController : Controller
+    {
+        private readonly ScanResultService _scanResultService;
+
+        public DownloadController(ScanResultService scanResultService)
+        {
+            _scanResultService = scanResultService;
+        }
+
+        [HttpGet("{id}")]
+        [ProducesResponseType(StatusCodes.Status200OK)]
+        [ProducesResponseType(StatusCodes.Status404NotFound)]
+        public async Task<IActionResult> Index(string id)
+        {
+            var fileStream = await _scanResultService.ObtainFile(id);
+
+            if (fileStream == null)
+                return NotFound();
+
+            return File(fileStream, "application/octet-stream");
+        }
+    }
+}

MalwareMultiScan.Api/Controllers/QueueController.cs

@@ -0,0 +1,55 @@
+using System.ComponentModel.DataAnnotations;
+using System.Threading.Tasks;
+using MalwareMultiScan.Api.Attributes;
+using MalwareMultiScan.Api.Data.Models;
+using MalwareMultiScan.Api.Services;
+using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.Mvc;
+
+namespace MalwareMultiScan.Api.Controllers
+{
+    [ApiController]
+    [Route("queue")]
+    [Produces("application/json")]
+    public class QueueController : Controller
+    {
+        private readonly ScanResultService _scanResultService;
+
+        public QueueController(ScanResultService scanResultService)
+        {
+            _scanResultService = scanResultService;
+        }
+
+        [HttpPost("file")]
+        [ProducesResponseType(typeof(ScanResult), StatusCodes.Status201Created)]
+        [ProducesResponseType(StatusCodes.Status400BadRequest)]
+        public async Task<IActionResult> ScanFile(
+            [Required, MaxFileSize] IFormFile file)
+        {
+            var result = await _scanResultService.CreateScanResult();
+
+            string storedFileId;
+
+            await using (var uploadFileStream = file.OpenReadStream())
+                storedFileId = await _scanResultService.StoreFile(file.Name, uploadFileStream);
+
+            await _scanResultService.QueueUrlScan(result, Url.Action("Index", "Download", new {id = storedFileId},
+                Request.Scheme, Request.Host.Value));
+
+            return CreatedAtAction("Index", "ScanResults", new {id = result.Id}, result);
+        }
+
+        [HttpPost("url")]
+        [ProducesResponseType(typeof(ScanResult), StatusCodes.Status201Created)]
+        [ProducesResponseType(StatusCodes.Status400BadRequest)]
+        public async Task<IActionResult> ScanUrl(
+            [FromForm, Required, IsHttpUrl] string url)
+        {
+            var result = await _scanResultService.CreateScanResult();
+
+            await _scanResultService.QueueUrlScan(result, url);
+
+            return CreatedAtAction("Index", "ScanResults", new {id = result.Id}, result);
+        }
+    }
+}

MalwareMultiScan.Api/Controllers/ScanResultsController.cs

@@ -0,0 +1,34 @@
+using System.Threading.Tasks;
+using MalwareMultiScan.Api.Data.Models;
+using MalwareMultiScan.Api.Services;
+using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.Mvc;
+
+namespace MalwareMultiScan.Api.Controllers
+{
+    [ApiController]
+    [Route("results")]
+    [Produces("application/json")]
+    public class ScanResultsController : Controller
+    {
+        private readonly ScanResultService _scanResultService;
+
+        public ScanResultsController(ScanResultService scanResultService)
+        {
+            _scanResultService = scanResultService;
+        }
+
+        [HttpGet("{id}")]
+        [ProducesResponseType(typeof(ScanResult), StatusCodes.Status200OK)]
+        [ProducesResponseType(StatusCodes.Status404NotFound)]
+        public async Task<IActionResult> Index(string id)
+        {
+            var scanResult = await _scanResultService.GetScanResult(id);
+
+            if (scanResult == null)
+                return NotFound();
+
+            return Ok(scanResult);
+        }
+    }
+}

MalwareMultiScan.Api/Data/Configuration/ScanBackend.cs

@@ -0,0 +1,8 @@
+namespace MalwareMultiScan.Api.Data.Configuration
+{
+    public class ScanBackend
+    {
+        public string Id { get; set; }
+        public bool Enabled { get; set; }
+    }
+}

MalwareMultiScan.Api/Data/Models/ScanResult.cs

@@ -0,0 +1,16 @@
+using System.Collections.Generic;
+using MongoDB.Bson;
+using MongoDB.Bson.Serialization.Attributes;
+
+namespace MalwareMultiScan.Api.Data.Models
+{
+    public class ScanResult
+    {
+        [BsonId]
+        [BsonRepresentation(BsonType.ObjectId)]
+        public string Id { get; set; }
+
+        public Dictionary<string, ScanResultEntry> Results { get; set; } =
+            new Dictionary<string, ScanResultEntry>();
+    }
+}

MalwareMultiScan.Api/Data/Models/ScanResultEntry.cs

@@ -0,0 +1,9 @@
+namespace MalwareMultiScan.Api.Data.Models
+{
+    public class ScanResultEntry
+    {
+        public bool Completed { get; set; }
+        public bool? Succeeded { get; set; }
+        public string[] Threats { get; set; }
+    }
+}

MalwareMultiScan.Api/Extensions/ServiceCollectionExtensions.cs

@@ -0,0 +1,42 @@
+using System.Net;
+using EasyNetQ;
+using Microsoft.AspNetCore.Builder;
+using Microsoft.AspNetCore.HttpOverrides;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+using MongoDB.Driver;
+
+namespace MalwareMultiScan.Api.Extensions
+{
+    internal static class ServiceCollectionExtensions
+    {
+        public static void AddMongoDb(this IServiceCollection services, IConfiguration configuration)
+        {
+            services.AddSingleton(
+                serviceProvider =>
+                {
+                    var db = new MongoClient(configuration.GetConnectionString("Mongo"));
+
+                    return db.GetDatabase(
+                        configuration.GetValue<string>("DatabaseName"));
+                });
+        }
+
+        public static void AddRabbitMq(this IServiceCollection services, IConfiguration configuration)
+        {
+            services.AddSingleton(x =>
+                RabbitHutch.CreateBus(configuration.GetConnectionString("RabbitMQ")));
+        }
+
+        public static void AddDockerForwardedHeadersOptions(this IServiceCollection services)
+        {
+            services.Configure<ForwardedHeadersOptions>(options =>
+            {
+                options.ForwardedHeaders = ForwardedHeaders.XForwardedFor | ForwardedHeaders.XForwardedProto;
+                options.KnownNetworks.Add(new IPNetwork(IPAddress.Parse("::ffff:10.0.0.0"), 104));
+                options.KnownNetworks.Add(new IPNetwork(IPAddress.Parse("::ffff:192.168.0.0"), 112));
+                options.KnownNetworks.Add(new IPNetwork(IPAddress.Parse("::ffff:172.16.0.0"), 108));
+            });
+        }
+    }
+}

MalwareMultiScan.Api/MalwareMultiScan.Api.csproj

@@ -0,0 +1,23 @@
+<Project Sdk="Microsoft.NET.Sdk.Web">
+
+    <PropertyGroup>
+        <TargetFramework>netcoreapp3.1</TargetFramework>
+    </PropertyGroup>
+
+    <ItemGroup>
+      <None Update="backends.yaml">
+        <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+      </None>
+    </ItemGroup>
+
+    <ItemGroup>
+      <PackageReference Include="EasyNetQ" Version="5.6.0" />
+      <PackageReference Include="MongoDB.Driver" Version="2.11.3" />
+      <PackageReference Include="MongoDB.Driver.GridFS" Version="2.11.3" />
+      <PackageReference Include="YamlDotNet" Version="8.1.2" />
+    </ItemGroup>
+
+    <ItemGroup>
+      <ProjectReference Include="..\MalwareMultiScan.Backends\MalwareMultiScan.Backends.csproj" />
+    </ItemGroup>
+</Project>

MalwareMultiScan.Api/Program.cs

@@ -1,7 +1,7 @@
 using Microsoft.AspNetCore.Hosting;
 using Microsoft.Extensions.Hosting;
 
-namespace MalwareMultiScan.Worker
+namespace MalwareMultiScan.Api
 {
     public static class Program
     {
@@ -13,7 +13,7 @@ namespace MalwareMultiScan.Worker
         private static IHostBuilder CreateHostBuilder(string[] args)
         {
             return Host.CreateDefaultBuilder(args)
-                .ConfigureWebHostDefaults(builder => { builder.UseStartup<Startup>(); });
+                .ConfigureWebHostDefaults(webBuilder => webBuilder.UseStartup<Startup>());
         }
     }
 }

MalwareMultiScan.Api/Services/ReceiverHostedService.cs

@@ -0,0 +1,69 @@
+using System.Threading;
+using System.Threading.Tasks;
+using EasyNetQ;
+using MalwareMultiScan.Backends.Messages;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.Hosting;
+using Microsoft.Extensions.Logging;
+
+namespace MalwareMultiScan.Api.Services
+{
+    /// <summary>
+    /// Receiver hosted service.
+    /// </summary>
+    public class ReceiverHostedService : IHostedService
+    {
+        private readonly IBus _bus;
+        private readonly IConfiguration _configuration;
+        private readonly ILogger<ReceiverHostedService> _logger;
+        private readonly ScanResultService _scanResultService;
+
+        /// <summary>
+        /// Create receiver hosted service.
+        /// </summary>
+        /// <param name="bus">Service bus.</param>
+        /// <param name="configuration">Configuration.</param>
+        /// <param name="scanResultService">Scan result service.</param>
+        /// <param name="logger">Logger.</param>
+        public ReceiverHostedService(IBus bus, IConfiguration configuration, ScanResultService scanResultService,
+            ILogger<ReceiverHostedService> logger)
+        {
+            _bus = bus;
+            _configuration = configuration;
+            _scanResultService = scanResultService;
+            _logger = logger;
+        }
+
+        /// <inheritdoc />
+        public Task StartAsync(CancellationToken cancellationToken)
+        {
+            _bus.Receive<ScanResultMessage>(_configuration.GetValue<string>("ResultsSubscriptionId"), async message =>
+            {
+                _logger.LogInformation(
+                    $"Received a result from {message.Backend} for {message.Id} " +
+                    $"with threats {string.Join(",", message.Threats)}");
+
+                await _scanResultService.UpdateScanResultForBackend(
+                    message.Id, message.Backend, true,
+                    message.Succeeded, message.Threats ?? new string[] { });
+            });
+
+            _logger.LogInformation(
+                "Started hosted service for receiving scan results");
+
+            return Task.CompletedTask;
+        }
+
+
+        /// <inheritdoc />
+        public Task StopAsync(CancellationToken cancellationToken)
+        {
+            _bus.Dispose();
+
+            _logger.LogInformation(
+                "Stopped hosted service for receiving scan results");
+
+            return Task.CompletedTask;
+        }
+    }
+}

MalwareMultiScan.Api/Services/ScanBackendService.cs

@@ -0,0 +1,72 @@
+using System;
+using System.IO;
+using System.Threading.Tasks;
+using EasyNetQ;
+using MalwareMultiScan.Api.Data.Configuration;
+using MalwareMultiScan.Api.Data.Models;
+using MalwareMultiScan.Backends.Messages;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.Logging;
+using YamlDotNet.Serialization;
+using YamlDotNet.Serialization.NamingConventions;
+
+namespace MalwareMultiScan.Api.Services
+{
+    /// <summary>
+    /// Scan backends service.
+    /// </summary>
+    public class ScanBackendService
+    {
+        private readonly IBus _bus;
+        private readonly ILogger<ScanBackendService> _logger;
+
+        /// <summary>
+        /// Create scan backend service.
+        /// </summary>
+        /// <param name="configuration">Configuration.</param>
+        /// <param name="bus">Service bus.</param>
+        /// <param name="logger">Logger.</param>
+        /// <exception cref="FileNotFoundException">Missing BackendsConfiguration YAML file.</exception>
+        public ScanBackendService(IConfiguration configuration, IBus bus, ILogger<ScanBackendService> logger)
+        {
+            _bus = bus;
+            _logger = logger;
+
+            var configurationPath = configuration.GetValue<string>("BackendsConfiguration");
+
+            if (!File.Exists(configurationPath))
+                throw new FileNotFoundException("Missing BackendsConfiguration YAML file", configurationPath);
+
+            var configurationContent = File.ReadAllText(configurationPath);
+
+            var deserializer = new DeserializerBuilder()
+                .WithNamingConvention(CamelCaseNamingConvention.Instance)
+                .Build();
+
+            List = deserializer.Deserialize<ScanBackend[]>(configurationContent);
+        }
+
+        /// <summary>
+        /// List of available scan backends.
+        /// </summary>
+        public ScanBackend[] List { get; }
+
+        /// <summary>
+        /// Queue URL scan.
+        /// </summary>
+        /// <param name="result">Scan result instance.</param>
+        /// <param name="backend">Scan backend.</param>
+        /// <param name="fileUrl">File download URL.</param>
+        public async Task QueueUrlScan(ScanResult result, ScanBackend backend, string fileUrl)
+        {
+            _logger.LogInformation(
+                $"Queueing scan for {result.Id} on {backend.Id} at {fileUrl}");
+
+            await _bus.SendAsync(backend.Id, new ScanRequestMessage
+            {
+                Id = result.Id,
+                Uri = new Uri(fileUrl)
+            });
+        }
+    }
+}

MalwareMultiScan.Api/Services/ScanResultService.cs

@@ -0,0 +1,128 @@
+using System.IO;
+using System.Linq;
+using System.Threading.Tasks;
+using MalwareMultiScan.Api.Data.Models;
+using MongoDB.Bson;
+using MongoDB.Driver;
+using MongoDB.Driver.GridFS;
+
+namespace MalwareMultiScan.Api.Services
+{
+    /// <summary>
+    /// Scan results service.
+    /// </summary>
+    public class ScanResultService
+    {
+        private const string CollectionName = "ScanResults";
+
+        private readonly GridFSBucket _bucket;
+        private readonly IMongoCollection<ScanResult> _collection;
+        private readonly ScanBackendService _scanBackendService;
+
+        /// <summary>
+        /// Create scan result service.
+        /// </summary>
+        /// <param name="db">Mongo database.</param>
+        /// <param name="scanBackendService">Scan backend service.</param>
+        public ScanResultService(IMongoDatabase db, ScanBackendService scanBackendService)
+        {
+            _scanBackendService = scanBackendService;
+
+            _bucket = new GridFSBucket(db);
+            _collection = db.GetCollection<ScanResult>(CollectionName);
+        }
+
+        /// <summary>
+        /// Create scan result.
+        /// </summary>
+        /// <returns>Scan result.</returns>
+        public async Task<ScanResult> CreateScanResult()
+        {
+            var scanResult = new ScanResult
+            {
+                Results = _scanBackendService.List
+                    .Where(b => b.Enabled)
+                    .ToDictionary(k => k.Id, v => new ScanResultEntry())
+            };
+
+            await _collection.InsertOneAsync(scanResult);
+
+            return scanResult;
+        }
+
+        /// <summary>
+        /// Get scan result.
+        /// </summary>
+        /// <param name="id">Scan result id.</param>
+        /// <returns>Scan result.</returns>
+        public async Task<ScanResult> GetScanResult(string id)
+        {
+            var result = await _collection.FindAsync(
+                Builders<ScanResult>.Filter.Where(r => r.Id == id));
+
+            return await result.FirstOrDefaultAsync();
+        }
+
+        /// <summary>
+        /// Update scan status for the backend.
+        /// </summary>
+        /// <param name="resultId">Result id.</param>
+        /// <param name="backendId">Backend id.</param>
+        /// <param name="completed">If the scan has been completed.</param>
+        /// <param name="succeeded">If the scan has been succeeded.</param>
+        /// <param name="threats">List of found threats.</param>
+        public async Task UpdateScanResultForBackend(string resultId, string backendId,
+            bool completed = false, bool succeeded = false, string[] threats = null)
+        {
+            await _collection.UpdateOneAsync(
+                Builders<ScanResult>.Filter.Where(r => r.Id == resultId),
+                Builders<ScanResult>.Update.Set(r => r.Results[backendId], new ScanResultEntry
+                {
+                    Completed = completed,
+                    Succeeded = succeeded,
+                    Threats = threats ?? new string[] { }
+                }));
+        }
+
+        /// <summary>
+        /// Queue URL scan.
+        /// </summary>
+        /// <param name="result">Scan result instance.</param>
+        /// <param name="fileUrl">File URL.</param>
+        public async Task QueueUrlScan(ScanResult result, string fileUrl)
+        {
+            foreach (var backend in _scanBackendService.List.Where(b => b.Enabled))
+                await _scanBackendService.QueueUrlScan(result, backend, fileUrl);
+        }
+
+        /// <summary>
+        /// Store file.
+        /// </summary>
+        /// <param name="fileName">File name.</param>
+        /// <param name="fileStream">File stream.</param>
+        /// <returns>Stored file id.</returns>
+        public async Task<string> StoreFile(string fileName, Stream fileStream)
+        {
+            var objectId = await _bucket.UploadFromStreamAsync(
+                fileName, fileStream);
+
+            return objectId.ToString();
+        }
+
+        /// <summary>
+        /// Obtain stored file stream.
+        /// </summary>
+        /// <param name="id">File id.</param>
+        /// <returns>File seekable stream.</returns>
+        public async Task<Stream> ObtainFile(string id)
+        {
+            if (!ObjectId.TryParse(id, out var objectId))
+                return null;
+
+            return await _bucket.OpenDownloadStreamAsync(objectId, new GridFSDownloadOptions
+            {
+                Seekable = true
+            });
+        }
+    }
+}

MalwareMultiScan.Api/Startup.cs

@@ -0,0 +1,40 @@
+using MalwareMultiScan.Api.Extensions;
+using MalwareMultiScan.Api.Services;
+using Microsoft.AspNetCore.Builder;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+
+namespace MalwareMultiScan.Api
+{
+    public class Startup
+    {
+        private readonly IConfiguration _configuration;
+
+        public Startup(IConfiguration configuration)
+        {
+            _configuration = configuration;
+        }
+
+        public void ConfigureServices(IServiceCollection services)
+        {
+            services.AddDockerForwardedHeadersOptions();
+
+            services.AddMongoDb(_configuration);
+            services.AddRabbitMq(_configuration);
+
+            services.AddSingleton<ScanBackendService>();
+            services.AddSingleton<ScanResultService>();
+
+            services.AddControllers();
+
+            services.AddHostedService<ReceiverHostedService>();
+        }
+
+        public void Configure(IApplicationBuilder app)
+        {
+            app.UseRouting();
+            app.UseForwardedHeaders();
+            app.UseEndpoints(endpoints => endpoints.MapControllers());
+        }
+    }
+}

MalwareMultiScan.Api/appsettings.json

@@ -0,0 +1,20 @@
+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft": "Warning",
+      "Microsoft.Hosting.Lifetime": "Information"
+    }
+  },
+  "AllowedHosts": "*",
+  
+  "ConnectionStrings": {
+    "Mongo": "mongodb://localhost:27017",
+    "RabbitMQ": "host=localhost"
+  },
+
+  "DatabaseName": "MalwareMultiScan",
+  "ResultsSubscriptionId": "mms.results",
+  "MaxFileSize": 1048576,
+  "BackendsConfiguration": "backends.yaml"
+}

MalwareMultiScan.Api/backends.yaml

@@ -0,0 +1,2 @@
+- id: dummy
+  enabled: true

MalwareMultiScan.Backends/Backends/Abstracts/AbstractLocalProcessScanBackend.cs

@@ -18,15 +18,12 @@ namespace MalwareMultiScan.Backends.Backends.Abstracts
             _logger = logger;
         }
 
-        protected virtual Regex MatchRegex { get; }
+        protected abstract Regex MatchRegex { get; }
-        protected virtual string BackendPath { get; }
+        protected abstract string BackendPath { get; }
-        protected virtual bool ParseStdErr { get; }
+        protected virtual bool ParseStdErr { get; } = false;
         protected virtual bool ThrowOnNonZeroExitCode { get; } = true;
 
-        protected virtual string GetBackendArguments(string path)
+        protected abstract string GetBackendArguments(string path);
-        {
-            throw new NotImplementedException();
-        }
 
         public override async Task<string[]> ScanAsync(string path, CancellationToken cancellationToken)
         {

MalwareMultiScan.Backends/Backends/Abstracts/AbstractScanBackend.cs

@@ -3,37 +3,25 @@ using System.IO;
 using System.Net.Http;
 using System.Threading;
 using System.Threading.Tasks;
-using MalwareMultiScan.Shared.Interfaces;
+using MalwareMultiScan.Backends.Interfaces;
-using Microsoft.AspNetCore.Http;
 
 namespace MalwareMultiScan.Backends.Backends.Abstracts
 {
     public abstract class AbstractScanBackend : IScanBackend
     {
-        public virtual string Id => throw new NotImplementedException();
+        public abstract string Id { get; }
 
-        public virtual DateTime DatabaseLastUpdate => throw new NotImplementedException();
+        public abstract Task<string[]> ScanAsync(string path, CancellationToken cancellationToken);
-
-        public virtual Task<string[]> ScanAsync(string path, CancellationToken cancellationToken)
-        {
-            throw new NotImplementedException();
-        }
 
         public async Task<string[]> ScanAsync(Uri uri, CancellationToken cancellationToken)
         {
             using var httpClient = new HttpClient();
+
             await using var uriStream = await httpClient.GetStreamAsync(uri);
 
             return await ScanAsync(uriStream, cancellationToken);
         }
 
-        public async Task<string[]> ScanAsync(IFormFile file, CancellationToken cancellationToken)
-        {
-            await using var fileStream = file.OpenReadStream();
-
-            return await ScanAsync(fileStream, cancellationToken);
-        }
-
         public async Task<string[]> ScanAsync(Stream stream, CancellationToken cancellationToken)
         {
             var tempFile = Path.GetTempFileName();

MalwareMultiScan.Backends/Backends/Implementations/ClamavScanBackend.cs

@@ -1,5 +1,3 @@
-using System;
-using System.IO;
 using System.Text.RegularExpressions;
 using MalwareMultiScan.Backends.Backends.Abstracts;
 using Microsoft.Extensions.Logging;
@@ -14,14 +12,13 @@ namespace MalwareMultiScan.Backends.Backends.Implementations
 
         public override string Id { get; } = "clamav";
 
-        public override DateTime DatabaseLastUpdate =>
-            File.GetLastWriteTime("/var/lib/clamav/daily.cvd");
-
         protected override string BackendPath { get; } = "/usr/bin/clamscan";
 
         protected override Regex MatchRegex { get; } =
             new Regex(@"(\S+): (?<threat>[\S]+) FOUND", RegexOptions.Compiled | RegexOptions.Multiline);
 
+        protected override bool ThrowOnNonZeroExitCode { get; } = false;
+
         protected override string GetBackendArguments(string path)
         {
             return $"--no-summary {path}";

MalwareMultiScan.Backends/Backends/Implementations/ComodoScanBackend.cs

@@ -1,5 +1,3 @@
-using System;
-using System.IO;
 using System.Text.RegularExpressions;
 using MalwareMultiScan.Backends.Backends.Abstracts;
 using Microsoft.Extensions.Logging;
@@ -14,9 +12,6 @@ namespace MalwareMultiScan.Backends.Backends.Implementations
 
         public override string Id { get; } = "comodo";
 
-        public override DateTime DatabaseLastUpdate =>
-            File.GetLastWriteTime("/opt/COMODO/scanners/bases.cav");
-
         protected override string BackendPath { get; } = "/opt/COMODO/cmdscan";
 
         protected override Regex MatchRegex { get; } =

MalwareMultiScan.Backends/Backends/Implementations/DrWebScanBackend.cs

@@ -1,5 +1,3 @@
-using System;
-using System.IO;
 using System.Text.RegularExpressions;
 using MalwareMultiScan.Backends.Backends.Abstracts;
 using Microsoft.Extensions.Logging;
@@ -14,9 +12,6 @@ namespace MalwareMultiScan.Backends.Backends.Implementations
 
         public override string Id { get; } = "drweb";
 
-        public override DateTime DatabaseLastUpdate =>
-            File.GetLastWriteTime("/var/opt/drweb.com/version/version.ini");
-
         protected override string BackendPath { get; } = "/usr/bin/drweb-ctl";
 
         protected override Regex MatchRegex { get; } =

MalwareMultiScan.Backends/Backends/Implementations/DummyScanBackend.cs

@@ -0,0 +1,33 @@
+using System;
+using System.IO;
+using System.Threading;
+using System.Threading.Tasks;
+using MalwareMultiScan.Backends.Interfaces;
+
+namespace MalwareMultiScan.Backends.Backends.Implementations
+{
+    public class DummyScanBackend : IScanBackend
+    {
+        public string Id { get; } = "dummy";
+
+        public Task<string[]> ScanAsync(string path, CancellationToken cancellationToken)
+        {
+            return Scan();
+        }
+
+        public Task<string[]> ScanAsync(Uri uri, CancellationToken cancellationToken)
+        {
+            return Scan();
+        }
+
+        public Task<string[]> ScanAsync(Stream stream, CancellationToken cancellationToken)
+        {
+            return Scan();
+        }
+
+        private static Task<string[]> Scan()
+        {
+            return Task.FromResult(new[] {"Malware.Dummy.Result"});
+        }
+    }
+}

MalwareMultiScan.Backends/Backends/Implementations/KesScanBackend.cs

@@ -1,5 +1,3 @@
-using System;
-using System.IO;
 using System.Text.RegularExpressions;
 using MalwareMultiScan.Backends.Backends.Abstracts;
 using Microsoft.Extensions.Logging;
@@ -14,9 +12,6 @@ namespace MalwareMultiScan.Backends.Backends.Implementations
 
         public override string Id { get; } = "kes";
 
-        public override DateTime DatabaseLastUpdate =>
-            File.GetLastWriteTime("/var/opt/kaspersky/kesl/common/updates/avbases/klsrl.dat");
-
         protected override string BackendPath { get; } = "/bin/bash";
 
         protected override Regex MatchRegex { get; } =

MalwareMultiScan.Backends/Backends/Implementations/McAffeeScanBackend.cs

@@ -1,5 +1,3 @@
-using System;
-using System.IO;
 using System.Text.RegularExpressions;
 using MalwareMultiScan.Backends.Backends.Abstracts;
 using Microsoft.Extensions.Logging;
@@ -14,9 +12,6 @@ namespace MalwareMultiScan.Backends.Backends.Implementations
 
         public override string Id { get; } = "mcafeee";
 
-        public override DateTime DatabaseLastUpdate =>
-            File.GetLastWriteTime("/usr/local/uvscan/avvscan.dat");
-
         protected override string BackendPath { get; } = "/usr/local/uvscan/uvscan";
 
         protected override bool ThrowOnNonZeroExitCode { get; } = false;

MalwareMultiScan.Backends/Backends/Implementations/SophosScanBackend.cs

@@ -1,5 +1,3 @@
-using System;
-using System.IO;
 using System.Text.RegularExpressions;
 using MalwareMultiScan.Backends.Backends.Abstracts;
 using Microsoft.Extensions.Logging;
@@ -14,9 +12,6 @@ namespace MalwareMultiScan.Backends.Backends.Implementations
 
         public override string Id { get; } = "sophos";
 
-        public override DateTime DatabaseLastUpdate =>
-            File.GetLastWriteTime("/opt/sophos-av/lib/sav/vdlsync.upd");
-
         protected override string BackendPath { get; } = "/opt/sophos-av/bin/savscan";
 
         protected override bool ThrowOnNonZeroExitCode { get; } = false;

MalwareMultiScan.Backends/Backends/Implementations/WindowsDefenderScanBackend.cs

@@ -1,5 +1,3 @@
-using System;
-using System.IO;
 using System.Text.RegularExpressions;
 using MalwareMultiScan.Backends.Backends.Abstracts;
 using Microsoft.Extensions.Logging;
@@ -14,9 +12,6 @@ namespace MalwareMultiScan.Backends.Backends.Implementations
 
         public override string Id { get; } = "windows-defender";
 
-        public override DateTime DatabaseLastUpdate =>
-            File.GetLastWriteTime("/opt/engine/mpavbase.vdm");
-
         protected override string BackendPath { get; } = "/opt/mpclient";
 
         protected override Regex MatchRegex { get; } =

MalwareMultiScan.Backends/Dockerfiles/Clamav.Dockerfile

@@ -1,4 +1,4 @@
-FROM mindcollapse/malware-multi-scan-worker:latest
+FROM mindcollapse/malware-multi-scan-scanner:latest
 
 ENV DEBIAN_FRONTEND noninteractive
 

MalwareMultiScan.Backends/Dockerfiles/Comodo.Dockerfile

@@ -1,4 +1,4 @@
-FROM mindcollapse/malware-multi-scan-worker:latest
+FROM mindcollapse/malware-multi-scan-scanner:latest
 
 RUN apt-get update && apt-get install wget -y
 

MalwareMultiScan.Backends/Dockerfiles/DrWeb.Dockerfile

@@ -1,4 +1,4 @@
-FROM mindcollapse/malware-multi-scan-worker:latest
+FROM mindcollapse/malware-multi-scan-scanner:latest
 
 ARG DRWEB_KEY
 ENV DRWEB_KEY=$DRWEB_KEY

MalwareMultiScan.Backends/Dockerfiles/KES.Dockerfile

@@ -1,4 +1,4 @@
-FROM mindcollapse/malware-multi-scan-worker:latest
+FROM mindcollapse/malware-multi-scan-scanner:latest
 
 ARG KES_KEY
 ENV KES_KEY=$KES_KEY

MalwareMultiScan.Backends/Dockerfiles/McAfee.Dockerfile

@@ -1,4 +1,4 @@
-FROM mindcollapse/malware-multi-scan-worker:latest
+FROM mindcollapse/malware-multi-scan-scanner:latest
 
 RUN apt-get update && apt-get install unzip wget -y
 

MalwareMultiScan.Backends/Dockerfiles/Sophos.Dockerfile

@@ -1,4 +1,4 @@
-FROM mindcollapse/malware-multi-scan-worker:latest
+FROM mindcollapse/malware-multi-scan-scanner:latest
 
 RUN apt-get update && apt-get install wget -y
 

MalwareMultiScan.Backends/Dockerfiles/WindowsDefender.Dockerfile

@@ -11,7 +11,7 @@ WORKDIR /opt/loadlibrary/engine
 RUN curl -L "https://go.microsoft.com/fwlink/?LinkID=121721&arch=x86" --output mpan-fe.exe
 RUN cabextract mpan-fe.exe && rm mpan-fe.exe
 
-FROM mindcollapse/malware-multi-scan-worker:latest
+FROM mindcollapse/malware-multi-scan-scanner:latest
 
 RUN apt-get update && apt-get install -y libc6-i386
 

MalwareMultiScan.Backends/Enums/BackendType.cs

@@ -1,7 +1,8 @@
-namespace MalwareMultiScan.Shared.Data.Enums
+namespace MalwareMultiScan.Backends.Enums
 {
     public enum BackendType
     {
+        Dummy,
         Defender,
         Clamav,
         DrWeb,

MalwareMultiScan.Backends/Extensions/ServiceCollectionExtensions.cs

@@ -0,0 +1,32 @@
+using System;
+using MalwareMultiScan.Backends.Backends.Implementations;
+using MalwareMultiScan.Backends.Enums;
+using MalwareMultiScan.Backends.Interfaces;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Logging;
+
+namespace MalwareMultiScan.Backends.Extensions
+{
+    public static class ServiceCollectionExtensions
+    {
+        public static void AddScanningBackend(this IServiceCollection services, BackendType type)
+        {
+            using var provider = services.BuildServiceProvider();
+
+            var logger = provider.GetService<ILogger<IScanBackend>>();
+
+            services.AddSingleton<IScanBackend>(type switch
+            {
+                BackendType.Dummy => new DummyScanBackend(),
+                BackendType.Defender => new WindowsDefenderScanBackend(logger),
+                BackendType.Clamav => new ClamavScanBackend(logger),
+                BackendType.DrWeb => new DrWebScanBackend(logger),
+                BackendType.Kes => new KesScanBackend(logger),
+                BackendType.Comodo => new ComodoScanBackend(logger),
+                BackendType.Sophos => new SophosScanBackend(logger),
+                BackendType.McAfee => new McAfeeScanBackend(logger),
+                _ => throw new NotImplementedException()
+            });
+        }
+    }
+}

MalwareMultiScan.Backends/Interfaces/IScanBackend.cs

@@ -2,19 +2,14 @@ using System;
 using System.IO;
 using System.Threading;
 using System.Threading.Tasks;
-using Microsoft.AspNetCore.Http;
 
-namespace MalwareMultiScan.Shared.Interfaces
+namespace MalwareMultiScan.Backends.Interfaces
 {
     public interface IScanBackend
     {
         public string Id { get; }
-
-        public DateTime DatabaseLastUpdate { get; }
-
         public Task<string[]> ScanAsync(string path, CancellationToken cancellationToken);
         public Task<string[]> ScanAsync(Uri uri, CancellationToken cancellationToken);
-        public Task<string[]> ScanAsync(IFormFile file, CancellationToken cancellationToken);
         public Task<string[]> ScanAsync(Stream stream, CancellationToken cancellationToken);
     }
 }

MalwareMultiScan.Backends/MalwareMultiScan.Backends.csproj

@@ -5,7 +5,8 @@
     </PropertyGroup>
     
     <ItemGroup>
-      <ProjectReference Include="..\MalwareMultiScan.Shared\MalwareMultiScan.Shared.csproj" />
+      <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="3.1.9" />
+      <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="3.1.9" />
     </ItemGroup>
 
 </Project>

MalwareMultiScan.Backends/Messages/ScanRequestMessage.cs

@@ -0,0 +1,11 @@
+using System;
+
+namespace MalwareMultiScan.Backends.Messages
+{
+    public class ScanRequestMessage
+    {
+        public string Id { get; set; }
+
+        public Uri Uri { get; set; }
+    }
+}

MalwareMultiScan.Backends/Messages/ScanResultMessage.cs

@@ -0,0 +1,11 @@
+namespace MalwareMultiScan.Backends.Messages
+{
+    public class ScanResultMessage
+    {
+        public string Id { get; set; }
+        public string Backend { get; set; }
+
+        public bool Succeeded { get; set; }
+        public string[] Threats { get; set; }
+    }
+}

MalwareMultiScan.Scanner/Dockerfile

@@ -2,11 +2,10 @@ FROM mcr.microsoft.com/dotnet/core/sdk:3.1 AS builder
 
 WORKDIR /src
 
-COPY MalwareMultiScan.Worker /src/MalwareMultiScan.Worker
+COPY MalwareMultiScan.Worker /src/MalwareMultiScan.Scanner
-COPY MalwareMultiScan.Shared /src/MalwareMultiScan.Shared
 COPY MalwareMultiScan.Backends /src/MalwareMultiScan.Backends
 
-RUN dotnet publish -c Release -r linux-x64 -o ./publish MalwareMultiScan.Worker/MalwareMultiScan.Worker.csproj
+RUN dotnet publish -c Release -r linux-x64 -o ./publish MalwareMultiScan.Scanner/MalwareMultiScan.Scanner.csproj
 
 FROM mcr.microsoft.com/dotnet/core/aspnet:3.1
 
@@ -14,7 +13,4 @@ WORKDIR /worker
 
 COPY --from=builder /src/publish /worker
 
-ENV ASPNETCORE_ENVIRONMENT=Production
+ENTRYPOINT ["/worker/MalwareMultiScan.Scanner"]
-ENV ASPNETCORE_URLS=http://+:9901
-
-ENTRYPOINT ["/worker/MalwareMultiScan.Worker"]

MalwareMultiScan.Scanner/MalwareMultiScan.Scanner.csproj

@@ -0,0 +1,15 @@
+<Project Sdk="Microsoft.NET.Sdk.Worker">
+
+    <PropertyGroup>
+        <TargetFramework>netcoreapp3.1</TargetFramework>
+    </PropertyGroup>
+
+    <ItemGroup>
+        <PackageReference Include="EasyNetQ" Version="5.6.0" />
+        <PackageReference Include="Microsoft.Extensions.Hosting" Version="3.1.8" />
+    </ItemGroup>
+
+    <ItemGroup>
+      <ProjectReference Include="..\MalwareMultiScan.Backends\MalwareMultiScan.Backends.csproj" />
+    </ItemGroup>
+</Project>

MalwareMultiScan.Scanner/Program.cs

@@ -0,0 +1,32 @@
+using System.Threading.Tasks;
+using MalwareMultiScan.Backends.Enums;
+using MalwareMultiScan.Backends.Extensions;
+using MalwareMultiScan.Scanner.Services;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Hosting;
+
+namespace MalwareMultiScan.Scanner
+{
+    public static class Program
+    {
+        public static async Task Main(string[] args)
+        {
+            await Host.CreateDefaultBuilder(args)
+                .ConfigureAppConfiguration(configure =>
+                {
+                    configure.AddJsonFile("appsettings.json");
+                    configure.AddEnvironmentVariables();
+                })
+                .ConfigureServices((context, services) =>
+                {
+                    services.AddLogging();
+
+                    services.AddScanningBackend(
+                        context.Configuration.GetValue<BackendType>("BackendType"));
+
+                    services.AddHostedService<ScanHostedService>();
+                }).RunConsoleAsync();
+        }
+    }
+}

MalwareMultiScan.Scanner/Services/ScanHostedService.cs

@@ -0,0 +1,90 @@
+using System;
+using System.Threading;
+using System.Threading.Tasks;
+using EasyNetQ;
+using MalwareMultiScan.Backends.Interfaces;
+using MalwareMultiScan.Backends.Messages;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.Hosting;
+using Microsoft.Extensions.Logging;
+
+namespace MalwareMultiScan.Scanner.Services
+{
+    internal class ScanHostedService : IHostedService
+    {
+        private readonly IScanBackend _backend;
+        private readonly IConfiguration _configuration;
+        private readonly ILogger<ScanHostedService> _logger;
+
+        private IBus _bus;
+
+        public ScanHostedService(ILogger<ScanHostedService> logger, IConfiguration configuration, IScanBackend backend)
+        {
+            _logger = logger;
+            _configuration = configuration;
+            _backend = backend;
+        }
+
+        public Task StartAsync(CancellationToken cancellationToken)
+        {
+            _bus = RabbitHutch.CreateBus(
+                _configuration.GetConnectionString("RabbitMQ"));
+
+            _bus.Receive<ScanRequestMessage>(_backend.Id, Scan);
+
+            _logger.LogInformation(
+                $"Started scan hosting service for the backend {_backend.Id}");
+
+            return Task.CompletedTask;
+        }
+
+        public Task StopAsync(CancellationToken cancellationToken)
+        {
+            _bus.Dispose();
+
+            _logger.LogInformation(
+                $"Stopped scan hosting service for the backend {_backend.Id}");
+
+            return Task.CompletedTask;
+        }
+
+        private async Task Scan(ScanRequestMessage message)
+        {
+            _logger.LogInformation(
+                $"Starting scan of {message.Uri} via backend {_backend.Id} from {message.Id}");
+
+            var cancellationTokenSource = new CancellationTokenSource(
+                TimeSpan.FromSeconds(_configuration.GetValue<int>("MaxScanningTime")));
+
+            var result = new ScanResultMessage
+            {
+                Id = message.Id,
+                Backend = _backend.Id
+            };
+
+            try
+            {
+                result.Threats = await _backend.ScanAsync(
+                    message.Uri, cancellationTokenSource.Token);
+
+                result.Succeeded = true;
+
+                _logger.LogInformation(
+                    $"Backend {_backend.Id} completed a scan of {message.Id} " +
+                    $"with result '{string.Join(", ", result.Threats)}'");
+            }
+            catch (Exception exception)
+            {
+                result.Succeeded = false;
+
+                _logger.LogError(
+                    exception, "Scanning failed with exception");
+            }
+            finally
+            {
+                await _bus.SendAsync(
+                    _configuration.GetValue<string>("ResultsSubscriptionId"), result);
+            }
+        }
+    }
+}

MalwareMultiScan.Scanner/appsettings.json

@@ -0,0 +1,18 @@
+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft": "Warning",
+      "Microsoft.Hosting.Lifetime": "Information"
+    }
+  },
+
+  "BackendType": "Dummy",
+  
+  "MaxScanningTime": 60,
+  "ResultsSubscriptionId": "mms.results",
+  
+  "ConnectionStrings": {
+    "RabbitMQ": "host=localhost;prefetchcount=1"
+  }
+}

MalwareMultiScan.Shared/Attributes/UrlValidationAttribute.cs

@@ -1,18 +0,0 @@
-using System;
-using System.ComponentModel.DataAnnotations;
-
-namespace MalwareMultiScan.Shared.Attributes
-{
-    public class UrlValidationAttribute : ValidationAttribute
-    {
-        protected override ValidationResult IsValid(object value, ValidationContext validationContext)
-        {
-            var uri = (Uri) value;
-
-            if (uri == null || uri.Scheme != "http" && uri.Scheme != "https")
-                return new ValidationResult("Only http(s) URLs are supported");
-
-            return ValidationResult.Success;
-        }
-    }
-}

MalwareMultiScan.Shared/Data/Requests/BasicRequest.cs

@@ -1,13 +0,0 @@
-using System;
-using System.ComponentModel.DataAnnotations;
-using MalwareMultiScan.Shared.Attributes;
-
-namespace MalwareMultiScan.Shared.Data.Requests
-{
-    public abstract class BasicRequest
-    {
-        [Required]
-        [UrlValidation]
-        public Uri CallbackUrl { get; set; }
-    }
-}

MalwareMultiScan.Shared/Data/Requests/FileRequest.cs

@@ -1,11 +0,0 @@
-using System.ComponentModel.DataAnnotations;
-using Microsoft.AspNetCore.Http;
-
-namespace MalwareMultiScan.Shared.Data.Requests
-{
-    public class FileRequest : BasicRequest
-    {
-        [Required]
-        public IFormFile InputFile { get; set; }
-    }
-}

MalwareMultiScan.Shared/Data/Requests/UrlRequest.cs

@@ -1,13 +0,0 @@
-using System;
-using System.ComponentModel.DataAnnotations;
-using MalwareMultiScan.Shared.Attributes;
-
-namespace MalwareMultiScan.Shared.Data.Requests
-{
-    public class UrlRequest : BasicRequest
-    {
-        [Required]
-        [UrlValidation]
-        public Uri InputUrl { get; set; }
-    }
-}

MalwareMultiScan.Shared/Data/Responses/ResultResponse.cs

@@ -1,18 +0,0 @@
-using System;
-using System.Linq;
-
-namespace MalwareMultiScan.Shared.Data.Responses
-{
-    public class ResultResponse
-    {
-        public string Backend { get; set; }
-
-        public bool Success { get; set; }
-
-        public DateTime? DatabaseLastUpdate { get; set; }
-
-        public bool Detected => Threats?.Any() == true;
-
-        public string[] Threats { get; set; }
-    }
-}

MalwareMultiScan.Shared/MalwareMultiScan.Shared.csproj

@@ -1,12 +0,0 @@
-<Project Sdk="Microsoft.NET.Sdk">
-
-    <PropertyGroup>
-        <TargetFramework>netcoreapp3.1</TargetFramework>
-    </PropertyGroup>
-
-    <ItemGroup>
-      <PackageReference Include="Microsoft.AspNetCore.Http.Features" Version="3.1.9" />
-      <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="3.1.9" />
-    </ItemGroup>
-
-</Project>

MalwareMultiScan.Worker/Controllers/ScanController.cs

@@ -1,46 +0,0 @@
-using System.IO;
-using System.Threading.Tasks;
-using Hangfire;
-using MalwareMultiScan.Shared.Data.Requests;
-using MalwareMultiScan.Worker.Jobs;
-using Microsoft.AspNetCore.Http;
-using Microsoft.AspNetCore.Mvc;
-
-namespace MalwareMultiScan.Worker.Controllers
-{
-    [ApiController]
-    [Produces("application/json")]
-    public class ScanController : ControllerBase
-    {
-        [HttpPost]
-        [ProducesResponseType(StatusCodes.Status202Accepted)]
-        [ProducesResponseType(StatusCodes.Status400BadRequest)]
-        [Route("/scan/file")]
-        public async Task<IActionResult> ScanFile([FromForm] FileRequest request)
-        {
-            var temporaryFile = Path.GetTempFileName();
-
-            await using (var temporaryFileSteam = System.IO.File.OpenWrite(temporaryFile))
-            {
-                await request.InputFile.CopyToAsync(temporaryFileSteam);
-            }
-
-            BackgroundJob.Enqueue<ScanJob>(
-                x => x.ScanFile(temporaryFile, request.CallbackUrl));
-
-            return Accepted(request.CallbackUrl);
-        }
-
-        [HttpPost]
-        [ProducesResponseType(StatusCodes.Status202Accepted)]
-        [ProducesResponseType(StatusCodes.Status400BadRequest)]
-        [Route("/scan/url")]
-        public IActionResult ScanUrl([FromForm] UrlRequest request)
-        {
-            BackgroundJob.Enqueue<ScanJob>(
-                x => x.ScanUrl(request.InputUrl, request.CallbackUrl));
-
-            return Accepted(request.CallbackUrl);
-        }
-    }
-}

MalwareMultiScan.Worker/Jobs/ScanJob.cs

@@ -1,112 +0,0 @@
-using System;
-using System.IO;
-using System.Net.Http;
-using System.Text;
-using System.Text.Json;
-using System.Threading;
-using System.Threading.Tasks;
-using Hangfire;
-using MalwareMultiScan.Backends.Backends.Implementations;
-using MalwareMultiScan.Shared.Data.Enums;
-using MalwareMultiScan.Shared.Data.Responses;
-using MalwareMultiScan.Shared.Interfaces;
-using Microsoft.Extensions.Configuration;
-using Microsoft.Extensions.Logging;
-
-namespace MalwareMultiScan.Worker.Jobs
-{
-    public class ScanJob
-    {
-        private readonly IScanBackend _backend;
-        private readonly IHttpClientFactory _httpClientFactory;
-        private readonly ILogger<ScanJob> _logger;
-        private readonly int _scanTimeout;
-
-        public ScanJob(IConfiguration configuration, ILogger<ScanJob> logger,
-            IHttpClientFactory httpClientFactory)
-        {
-            _logger = logger;
-            _httpClientFactory = httpClientFactory;
-            _scanTimeout = configuration.GetValue<int>("ScanTimeout");
-
-            _backend = configuration.GetValue<BackendType>("BackendType") switch
-            {
-                BackendType.Defender => new WindowsDefenderScanBackend(logger),
-                BackendType.Clamav => new ClamavScanBackend(logger),
-                BackendType.DrWeb => new DrWebScanBackend(logger),
-                BackendType.Kes => new KesScanBackend(logger),
-                BackendType.Comodo => new ComodoScanBackend(logger),
-                BackendType.Sophos => new SophosScanBackend(logger),
-                BackendType.McAfee => new McAfeeScanBackend(logger),
-                _ => throw new NotImplementedException()
-            };
-        }
-
-        private async Task PostResult(ResultResponse response, Uri callbackUrl, CancellationToken cancellationToken)
-        {
-            var serializedResponse = JsonSerializer.Serialize(
-                response, typeof(ResultResponse), new JsonSerializerOptions
-                {
-                    WriteIndented = true
-                });
-
-            _logger.LogInformation(
-                $"Sending following payload to {callbackUrl}: {serializedResponse}");
-
-            using var httpClient = _httpClientFactory.CreateClient();
-
-            var callbackResponse = await httpClient.PostAsync(callbackUrl,
-                new StringContent(serializedResponse, Encoding.UTF8, "application/json"), cancellationToken);
-
-            _logger.LogInformation($"Callback URL {callbackUrl} returned a status {callbackResponse.StatusCode}");
-        }
-
-        private async Task Scan(Func<CancellationToken, Task<string[]>> scanMethod, Uri callbackUrl)
-        {
-            var cancellationTokenSource = new CancellationTokenSource();
-
-            cancellationTokenSource.CancelAfter(_scanTimeout * 1000);
-
-            var cancellationToken = cancellationTokenSource.Token;
-
-            var response = new ResultResponse
-            {
-                Backend = _backend.Id
-            };
-
-            try
-            {
-                response.Success = true;
-                response.Threats = await scanMethod(cancellationToken);
-                response.DatabaseLastUpdate = _backend.DatabaseLastUpdate;
-            }
-            catch (Exception exception)
-            {
-                response.Success = false;
-
-                _logger.LogError(exception, "Scanning failed with exception");
-            }
-
-            await PostResult(response, callbackUrl, cancellationToken);
-        }
-
-        [AutomaticRetry(Attempts = 0, OnAttemptsExceeded = AttemptsExceededAction.Delete)]
-        public async Task ScanUrl(Uri url, Uri callbackUrl)
-        {
-            await Scan(async t => await _backend.ScanAsync(url, t), callbackUrl);
-        }
-
-        [AutomaticRetry(Attempts = 0, OnAttemptsExceeded = AttemptsExceededAction.Delete)]
-        public async Task ScanFile(string file, Uri callbackUrl)
-        {
-            try
-            {
-                await Scan(async t => await _backend.ScanAsync(file, t), callbackUrl);
-            }
-            finally
-            {
-                File.Delete(file);
-            }
-        }
-    }
-}

MalwareMultiScan.Worker/MalwareMultiScan.Worker.csproj

@@ -1,17 +0,0 @@
-<Project Sdk="Microsoft.NET.Sdk.Web">
-
-    <PropertyGroup>
-        <TargetFramework>netcoreapp3.1</TargetFramework>
-    </PropertyGroup>
-
-    <ItemGroup>
-      <ProjectReference Include="..\MalwareMultiScan.Backends\MalwareMultiScan.Backends.csproj" />
-      <ProjectReference Include="..\MalwareMultiScan.Shared\MalwareMultiScan.Shared.csproj" />
-    </ItemGroup>
-
-    <ItemGroup>
-      <PackageReference Include="Hangfire.AspNetCore" Version="1.7.16" />
-      <PackageReference Include="Hangfire.MemoryStorage" Version="1.7.0" />
-    </ItemGroup>
-    
-</Project>

MalwareMultiScan.Worker/Properties/launchSettings.json

@@ -1,30 +0,0 @@
-{
-  "$schema": "http://json.schemastore.org/launchsettings.json",
-  "iisSettings": {
-    "windowsAuthentication": false,
-    "anonymousAuthentication": true,
-    "iisExpress": {
-      "applicationUrl": "http://localhost:53549",
-      "sslPort": 44380
-    }
-  },
-  "profiles": {
-    "IIS Express": {
-      "commandName": "IISExpress",
-      "launchBrowser": true,
-      "launchUrl": "weatherforecast",
-      "environmentVariables": {
-        "ASPNETCORE_ENVIRONMENT": "Development"
-      }
-    },
-    "MalwareMultiScan.Worker": {
-      "commandName": "Project",
-      "launchBrowser": true,
-      "launchUrl": "weatherforecast",
-      "applicationUrl": "https://localhost:5001;http://localhost:5000",
-      "environmentVariables": {
-        "ASPNETCORE_ENVIRONMENT": "Development"
-      }
-    }
-  }
-}

MalwareMultiScan.Worker/Startup.cs

@@ -1,35 +0,0 @@
-using Hangfire;
-using Hangfire.MemoryStorage;
-using MalwareMultiScan.Worker.Jobs;
-using Microsoft.AspNetCore.Builder;
-using Microsoft.AspNetCore.Hosting;
-using Microsoft.Extensions.DependencyInjection;
-
-namespace MalwareMultiScan.Worker
-{
-    public class Startup
-    {
-        public void ConfigureServices(IServiceCollection services)
-        {
-            services.AddLogging();
-            services.AddControllers();
-            services.AddHttpClient();
-
-            services.AddSingleton<ScanJob>();
-
-            services.AddHangfire(
-                configuration => configuration.UseMemoryStorage());
-
-            services.AddHangfireServer();
-        }
-
-        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
-        {
-            app.UseRouting();
-
-            app.UseEndpoints(endpoints => { endpoints.MapControllers(); });
-
-            app.UseHangfireServer();
-        }
-    }
-}

MalwareMultiScan.Worker/appsettings.Development.json

@@ -1,9 +0,0 @@
-{
-  "Logging": {
-    "LogLevel": {
-      "Default": "Information",
-      "Microsoft": "Warning",
-      "Microsoft.Hosting.Lifetime": "Information"
-    }
-  }
-}

MalwareMultiScan.Worker/appsettings.json

@@ -1,13 +0,0 @@
-{
-  "Logging": {
-    "LogLevel": {
-      "Default": "Warning",
-      "MalwareMultiScan": "Debug"
-    }
-  },
-  
-  "AllowedHosts": "*",
-  
-  "BackendType": "",
-  "ScanTimeout": 300
-}

MalwareMultiScan.sln

@@ -1,28 +1,28 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MalwareMultiScan.Worker", "MalwareMultiScan.Worker\MalwareMultiScan.Worker.csproj", "{5D515E0A-B2C6-4C1D-88F6-C296F73409FA}"
-EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MalwareMultiScan.Shared", "MalwareMultiScan.Shared\MalwareMultiScan.Shared.csproj", "{9E0A0B50-741F-4A49-97A2-0B337374347F}"
-EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MalwareMultiScan.Backends", "MalwareMultiScan.Backends\MalwareMultiScan.Backends.csproj", "{382B49AC-0FFA-44FC-875D-9D4692DDC05D}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MalwareMultiScan.Api", "MalwareMultiScan.Api\MalwareMultiScan.Api.csproj", "{7B63B897-D390-4617-821F-F96799CBA2F4}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "MalwareMultiScan.Scanner", "MalwareMultiScan.Scanner\MalwareMultiScan.Scanner.csproj", "{8A16A3C4-2AE3-4F63-8280-635FF7878080}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
 		Release|Any CPU = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(ProjectConfigurationPlatforms) = postSolution
-		{5D515E0A-B2C6-4C1D-88F6-C296F73409FA}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{5D515E0A-B2C6-4C1D-88F6-C296F73409FA}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{5D515E0A-B2C6-4C1D-88F6-C296F73409FA}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{5D515E0A-B2C6-4C1D-88F6-C296F73409FA}.Release|Any CPU.Build.0 = Release|Any CPU
-		{9E0A0B50-741F-4A49-97A2-0B337374347F}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{9E0A0B50-741F-4A49-97A2-0B337374347F}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{9E0A0B50-741F-4A49-97A2-0B337374347F}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{9E0A0B50-741F-4A49-97A2-0B337374347F}.Release|Any CPU.Build.0 = Release|Any CPU
 		{382B49AC-0FFA-44FC-875D-9D4692DDC05D}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
 		{382B49AC-0FFA-44FC-875D-9D4692DDC05D}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{382B49AC-0FFA-44FC-875D-9D4692DDC05D}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{382B49AC-0FFA-44FC-875D-9D4692DDC05D}.Release|Any CPU.Build.0 = Release|Any CPU
+		{7B63B897-D390-4617-821F-F96799CBA2F4}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{7B63B897-D390-4617-821F-F96799CBA2F4}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{7B63B897-D390-4617-821F-F96799CBA2F4}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{7B63B897-D390-4617-821F-F96799CBA2F4}.Release|Any CPU.Build.0 = Release|Any CPU
+		{8A16A3C4-2AE3-4F63-8280-635FF7878080}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{8A16A3C4-2AE3-4F63-8280-635FF7878080}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{8A16A3C4-2AE3-4F63-8280-635FF7878080}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{8A16A3C4-2AE3-4F63-8280-635FF7878080}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 EndGlobal