Fixed issue where qos was being created for each request so circuit breaker was never stopping traffic going to downstream service.

src/Ocelot/Configuration/Builder/QoSOptionsBuilder.cs

@@ -0,0 +1,34 @@
+namespace Ocelot.Configuration.Builder
+{
+    public class QoSOptionsBuilder
+    {
+        private int _exceptionsAllowedBeforeBreaking;
+
+        private int _durationOfBreak;
+
+        private int _timeoutValue;
+
+        public QoSOptionsBuilder WithExceptionsAllowedBeforeBreaking(int exceptionsAllowedBeforeBreaking)
+        {
+            _exceptionsAllowedBeforeBreaking = exceptionsAllowedBeforeBreaking;
+            return this;
+        }
+
+        public QoSOptionsBuilder WithDurationOfBreak(int durationOfBreak)
+        {
+            _durationOfBreak = durationOfBreak;
+            return this;
+        }
+
+        public QoSOptionsBuilder WithTimeoutValue(int timeoutValue)
+        {
+            _timeoutValue = timeoutValue;
+            return this;
+        }
+
+        public QoSOptions Build()
+        {
+            return new QoSOptions(_exceptionsAllowedBeforeBreaking, _durationOfBreak, _timeoutValue);
+        }
+    }
+}

src/Ocelot/Configuration/Creator/FileOcelotConfigurationCreator.cs

@@ -1,6 +1,5 @@
 using System;
 using System.Collections.Generic;
-using System.Net.Http;
 using System.Text;
 using System.Threading.Tasks;
 using Microsoft.Extensions.Logging;
@@ -10,9 +9,9 @@ using Ocelot.Configuration.File;
 using Ocelot.Configuration.Parser;
 using Ocelot.Configuration.Validator;
 using Ocelot.LoadBalancer.LoadBalancers;
+using Ocelot.Requester.QoS;
 using Ocelot.Responses;
 using Ocelot.Utilities;
-using Ocelot.Values;
 
 namespace Ocelot.Configuration.Creator
 {
@@ -26,11 +25,14 @@ namespace Ocelot.Configuration.Creator
         private const string RegExMatchEverything = ".*";
         private const string RegExMatchEndString = "$";
         private const string RegExIgnoreCase = "(?i)";
+        private const string RegExForwardSlashOnly = "^/$";
 
         private readonly IClaimToThingConfigurationParser _claimToThingConfigurationParser;
         private readonly ILogger<FileOcelotConfigurationCreator> _logger;
         private readonly ILoadBalancerFactory _loadBalanceFactory;
         private readonly ILoadBalancerHouse _loadBalancerHouse;
+        private readonly IQoSProviderFactory _qoSProviderFactory;
+        private readonly IQosProviderHouse _qosProviderHouse;
 
         public FileOcelotConfigurationCreator(
             IOptions<FileConfiguration> options, 
@@ -38,10 +40,14 @@ namespace Ocelot.Configuration.Creator
             IClaimToThingConfigurationParser claimToThingConfigurationParser, 
             ILogger<FileOcelotConfigurationCreator> logger,
             ILoadBalancerFactory loadBalancerFactory,
-            ILoadBalancerHouse loadBalancerHouse)
+            ILoadBalancerHouse loadBalancerHouse, 
+            IQoSProviderFactory qoSProviderFactory, 
+            IQosProviderHouse qosProviderHouse)
         {
             _loadBalanceFactory = loadBalancerFactory;
             _loadBalancerHouse = loadBalancerHouse;
+            _qoSProviderFactory = qoSProviderFactory;
+            _qosProviderHouse = qosProviderHouse;
             _options = options;
             _configurationValidator = configurationValidator;
             _claimToThingConfigurationParser = claimToThingConfigurationParser;
@@ -86,17 +92,17 @@ namespace Ocelot.Configuration.Creator
         {
             var isAuthenticated = IsAuthenticated(fileReRoute);
 
-            var isAuthorised = IsAuthenticated(fileReRoute);
+            var isAuthorised = IsAuthorised(fileReRoute);
 
             var isCached = IsCached(fileReRoute);
 
             var requestIdKey = BuildRequestId(fileReRoute, globalConfiguration);
 
-            var loadBalancerKey = BuildLoadBalancerKey(fileReRoute);
+            var reRouteKey = BuildReRouteKey(fileReRoute);
 
-            var upstreamTemplatePattern = BuildUpstreamTemplate(fileReRoute);
+            var upstreamTemplatePattern = BuildUpstreamTemplatePattern(fileReRoute);
 
-            var isQos = fileReRoute.QoSOptions.ExceptionsAllowedBeforeBreaking > 0 && fileReRoute.QoSOptions.TimeoutValue >0;
+            var isQos = IsQoS(fileReRoute);
 
             var serviceProviderConfiguration = BuildServiceProviderConfiguration(fileReRoute, globalConfiguration);
 
@@ -108,6 +114,8 @@ namespace Ocelot.Configuration.Creator
 
             var claimsToQueries = BuildAddThingsToRequest(fileReRoute.AddQueriesToRequest);
 
+            var qosOptions = BuildQoSOptions(fileReRoute);
+
             var reRoute = new ReRouteBuilder()
                 .WithDownstreamPathTemplate(fileReRoute.DownstreamPathTemplate)
                 .WithUpstreamPathTemplate(fileReRoute.UpstreamPathTemplate)
@@ -127,16 +135,31 @@ namespace Ocelot.Configuration.Creator
                 .WithLoadBalancer(fileReRoute.LoadBalancer)
                 .WithDownstreamHost(fileReRoute.DownstreamHost)
                 .WithDownstreamPort(fileReRoute.DownstreamPort)
-                .WithLoadBalancerKey(loadBalancerKey)
+                .WithLoadBalancerKey(reRouteKey)
                 .WithServiceProviderConfiguraion(serviceProviderConfiguration)
                 .WithIsQos(isQos)
-                .WithQosOptions(new QoSOptions(fileReRoute.QoSOptions.ExceptionsAllowedBeforeBreaking, fileReRoute.QoSOptions.DurationOfBreak, fileReRoute.QoSOptions.TimeoutValue))
+                .WithQosOptions(qosOptions)
                 .Build();   
 
             await SetupLoadBalancer(reRoute);
+            SetupQosProvider(reRoute);
             return reRoute;
         }
 
+        private QoSOptions BuildQoSOptions(FileReRoute fileReRoute)
+        {
+            return new QoSOptionsBuilder()
+                .WithExceptionsAllowedBeforeBreaking(fileReRoute.QoSOptions.ExceptionsAllowedBeforeBreaking)
+                .WithDurationOfBreak(fileReRoute.QoSOptions.DurationOfBreak)
+                .WithTimeoutValue(fileReRoute.QoSOptions.TimeoutValue)
+                .Build();
+        }
+
+        private bool IsQoS(FileReRoute fileReRoute)
+        {
+            return fileReRoute.QoSOptions?.ExceptionsAllowedBeforeBreaking > 0 && fileReRoute.QoSOptions?.TimeoutValue > 0;
+        }
+
         private bool IsAuthenticated(FileReRoute fileReRoute)
         {
             return !string.IsNullOrEmpty(fileReRoute.AuthenticationOptions?.Provider);
@@ -163,7 +186,7 @@ namespace Ocelot.Configuration.Creator
                 return requestIdKey;
         }
 
-        private string BuildLoadBalancerKey(FileReRoute fileReRoute)
+        private string BuildReRouteKey(FileReRoute fileReRoute)
         {
             //note - not sure if this is the correct key, but this is probably the only unique key i can think of given my poor brain
             var loadBalancerKey = $"{fileReRoute.UpstreamPathTemplate}{fileReRoute.UpstreamHttpMethod}";
@@ -185,7 +208,13 @@ namespace Ocelot.Configuration.Creator
         private async Task SetupLoadBalancer(ReRoute reRoute)
         {
             var loadBalancer = await _loadBalanceFactory.Get(reRoute);
-            _loadBalancerHouse.Add(reRoute.LoadBalancerKey, loadBalancer);
+            _loadBalancerHouse.Add(reRoute.ReRouteKey, loadBalancer);
+        }
+
+        private void SetupQosProvider(ReRoute reRoute)
+        {
+            var loadBalancer = _qoSProviderFactory.Get(reRoute);
+            _qosProviderHouse.Add(reRoute.ReRouteKey, loadBalancer);
         }
 
         private ServiceProviderConfiguraion BuildServiceProviderConfiguration(FileReRoute fileReRoute, FileGlobalConfiguration globalConfiguration)
@@ -206,7 +235,7 @@ namespace Ocelot.Configuration.Creator
                     .Build();
         }
 
-        private string BuildUpstreamTemplate(FileReRoute reRoute)
+        private string BuildUpstreamTemplatePattern(FileReRoute reRoute)
         {
             var upstreamTemplate = reRoute.UpstreamPathTemplate;
 
@@ -230,6 +259,11 @@ namespace Ocelot.Configuration.Creator
                 upstreamTemplate = upstreamTemplate.Replace(placeholder, RegExMatchEverything);
             }
 
+            if (upstreamTemplate == "/")
+            {
+                return RegExForwardSlashOnly;
+            }
+
             var route = reRoute.ReRouteIsCaseSensitive 
                 ? $"{upstreamTemplate}{RegExMatchEndString}" 
                 : $"{RegExIgnoreCase}{upstreamTemplate}{RegExMatchEndString}";

src/Ocelot/Configuration/QoSOptions.cs

@@ -1,8 +1,5 @@
-using Polly.Timeout;
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Threading.Tasks;
+using System;
+using Polly.Timeout;
 
 namespace Ocelot.Configuration
 {

src/Ocelot/Configuration/ReRoute.cs

@@ -25,12 +25,12 @@ namespace Ocelot.Configuration
             string loadBalancer, 
             string downstreamHost, 
             int downstreamPort, 
-            string loadBalancerKey, 
+            string reRouteKey, 
             ServiceProviderConfiguraion serviceProviderConfiguraion,
             bool isQos,
             QoSOptions qos)
         {
-            LoadBalancerKey = loadBalancerKey;
+            ReRouteKey = reRouteKey;
             ServiceProviderConfiguraion = serviceProviderConfiguraion;
             LoadBalancer = loadBalancer;
             DownstreamHost = downstreamHost;
@@ -57,7 +57,7 @@ namespace Ocelot.Configuration
             QosOptions = qos;
         }
 
-        public string LoadBalancerKey {get;private set;}
+        public string ReRouteKey {get;private set;}
         public PathTemplate DownstreamPathTemplate { get; private set; }
         public PathTemplate UpstreamPathTemplate { get; private set; }
         public string UpstreamTemplatePattern { get; private set; }

src/Ocelot/DependencyInjection/ServiceCollectionExtensions.cs

@@ -28,6 +28,7 @@ using Ocelot.Logging;
 using Ocelot.QueryStrings;
 using Ocelot.Request.Builder;
 using Ocelot.Requester;
+using Ocelot.Requester.QoS;
 using Ocelot.Responder;
 using Ocelot.ServiceDiscovery;
 
@@ -61,6 +62,8 @@ namespace Ocelot.DependencyInjection
         {
             services.AddMvcCore().AddJsonFormatters();
             services.AddLogging();
+            services.AddSingleton<IQosProviderHouse, QosProviderHouse>();
+            services.AddSingleton<IQoSProviderFactory, QoSProviderFactory>();
             services.AddSingleton<IServiceDiscoveryProviderFactory, ServiceDiscoveryProviderFactory>();
             services.AddSingleton<ILoadBalancerFactory, LoadBalancerFactory>();
             services.AddSingleton<ILoadBalancerHouse, LoadBalancerHouse>();

src/Ocelot/DownstreamRouteFinder/Finder/DownstreamRouteFinder.cs

@@ -30,6 +30,13 @@ namespace Ocelot.DownstreamRouteFinder.Finder
 
             foreach (var reRoute in applicableReRoutes)
             {
+                if (upstreamUrlPath == reRoute.UpstreamTemplatePattern)
+                {
+                    var templateVariableNameAndValues = _urlPathPlaceholderNameAndValueFinder.Find(upstreamUrlPath, reRoute.UpstreamPathTemplate.Value);
+
+                    return new OkResponse<DownstreamRoute>(new DownstreamRoute(templateVariableNameAndValues.Data, reRoute));
+                }
+
                 var urlMatch = _urlMatcher.Match(upstreamUrlPath, reRoute.UpstreamTemplatePattern);
 
                 if (urlMatch.Data.Match)

src/Ocelot/Errors/OcelotErrorCode.cs

@@ -26,6 +26,7 @@
         ServicesAreEmptyError,
         UnableToFindServiceDiscoveryProviderError,
         UnableToFindLoadBalancerError,
-        RequestTimedOutError
+        RequestTimedOutError,
+        UnableToFindQoSProviderError
     }
 }

src/Ocelot/LoadBalancer/Middleware/LoadBalancingMiddleware.cs

@@ -6,7 +6,6 @@ using Ocelot.LoadBalancer.LoadBalancers;
 using Ocelot.Logging;
 using Ocelot.Middleware;
 using Ocelot.QueryStrings.Middleware;
-using Ocelot.ServiceDiscovery;
 
 namespace Ocelot.LoadBalancer.Middleware
 {
@@ -31,7 +30,7 @@ namespace Ocelot.LoadBalancer.Middleware
         {
             _logger.LogDebug("started calling load balancing middleware");
 
-            var loadBalancer = _loadBalancerHouse.Get(DownstreamRoute.ReRoute.LoadBalancerKey);
+            var loadBalancer = _loadBalancerHouse.Get(DownstreamRoute.ReRoute.ReRouteKey);
             if(loadBalancer.IsError)
             {
                 SetPipelineError(loadBalancer.Errors);

src/Ocelot/Request/Builder/HttpRequestCreator.cs

@@ -3,6 +3,7 @@ using System.Threading.Tasks;
 using Microsoft.AspNetCore.Http;
 using Ocelot.Responses;
 using Ocelot.Configuration;
+using Ocelot.Requester.QoS;
 
 namespace Ocelot.Request.Builder
 {
@@ -18,7 +19,7 @@ namespace Ocelot.Request.Builder
             string contentType, 
             RequestId.RequestId requestId,
             bool isQos,
-            QoSOptions qos)
+            IQoSProvider qosProvider)
         {
             var request = await new RequestBuilder()
                 .WithHttpMethod(httpMethod)
@@ -30,7 +31,7 @@ namespace Ocelot.Request.Builder
                 .WithRequestId(requestId)
                 .WithCookies(cookies)
                 .WithIsQos(isQos)
-                .WithQos(qos)
+                .WithQos(qosProvider)
                 .Build();
 
             return new OkResponse<Request>(request);

src/Ocelot/Request/Builder/IRequestCreator.cs

@@ -1,8 +1,8 @@
 using System.IO;
 using System.Threading.Tasks;
 using Microsoft.AspNetCore.Http;
+using Ocelot.Requester.QoS;
 using Ocelot.Responses;
-using Ocelot.Configuration;
 
 namespace Ocelot.Request.Builder
 {
@@ -17,6 +17,6 @@ namespace Ocelot.Request.Builder
             string contentType,
             RequestId.RequestId requestId,
             bool isQos,
-            QoSOptions qos);
+            IQoSProvider qosProvider);
     }
 }

src/Ocelot/Request/Builder/RequestBuilder.cs

@@ -8,7 +8,7 @@ using System.Net.Http.Headers;
 using System.Threading.Tasks;
 using Microsoft.AspNetCore.Http;
 using Microsoft.Extensions.Primitives;
-using Ocelot.Configuration;
+using Ocelot.Requester.QoS;
 
 namespace Ocelot.Request.Builder
 {
@@ -24,7 +24,7 @@ namespace Ocelot.Request.Builder
         private IRequestCookieCollection _cookies;
         private readonly string[] _unsupportedHeaders = {"host"};
         private bool _isQos;
-        private QoSOptions _qos;
+        private IQoSProvider _qoSProvider;
 
         public RequestBuilder WithHttpMethod(string httpMethod)
         {
@@ -80,9 +80,9 @@ namespace Ocelot.Request.Builder
             return this;
         }
 
-        public RequestBuilder WithQos(QoSOptions qos)
+        public RequestBuilder WithQos(IQoSProvider qoSProvider)
         {
-            _qos = qos;
+            _qoSProvider = qoSProvider;
             return this;
         }
 
@@ -105,7 +105,7 @@ namespace Ocelot.Request.Builder
 
             var cookieContainer = CreateCookieContainer(uri);
 
-            return new Request(httpRequestMessage, cookieContainer,_isQos,_qos);
+            return new Request(httpRequestMessage, cookieContainer,_isQos, _qoSProvider);
         }
 
         private Uri CreateUri()

src/Ocelot/Request/Middleware/HttpRequestBuilderMiddleware.cs

@@ -1,10 +1,10 @@
 using System.Threading.Tasks;
 using Microsoft.AspNetCore.Http;
-using Microsoft.Extensions.Logging;
 using Ocelot.Infrastructure.RequestData;
 using Ocelot.Logging;
 using Ocelot.Middleware;
 using Ocelot.Request.Builder;
+using Ocelot.Requester.QoS;
 
 namespace Ocelot.Request.Middleware
 {
@@ -13,15 +13,18 @@ namespace Ocelot.Request.Middleware
         private readonly RequestDelegate _next;
         private readonly IRequestCreator _requestCreator;
         private readonly IOcelotLogger _logger;
+        private readonly IQosProviderHouse _qosProviderHouse;
 
         public HttpRequestBuilderMiddleware(RequestDelegate next,
             IOcelotLoggerFactory loggerFactory,
             IRequestScopedDataRepository requestScopedDataRepository, 
-            IRequestCreator requestCreator)
+            IRequestCreator requestCreator, 
+            IQosProviderHouse qosProviderHouse)
             :base(requestScopedDataRepository)
         {
             _next = next;
             _requestCreator = requestCreator;
+            _qosProviderHouse = qosProviderHouse;
             _logger = loggerFactory.CreateLogger<HttpRequestBuilderMiddleware>();
         }
 
@@ -29,17 +32,35 @@ namespace Ocelot.Request.Middleware
         {
             _logger.LogDebug("started calling request builder middleware");
 
+            var qosProvider = _qosProviderHouse.Get(DownstreamRoute.ReRoute.ReRouteKey);
+
+            if (qosProvider.IsError)
+            {
+                _logger.LogDebug("IQosProviderHouse returned an error, setting pipeline error");
+
+                SetPipelineError(qosProvider.Errors);
+
+                return;
+            }
+
             var buildResult = await _requestCreator
-                .Build(context.Request.Method, DownstreamUrl, context.Request.Body,
-                    context.Request.Headers, context.Request.Cookies, context.Request.QueryString,
-                    context.Request.ContentType, new RequestId.RequestId(DownstreamRoute?.ReRoute?.RequestIdKey, context.TraceIdentifier),
-                    DownstreamRoute.ReRoute.IsQos,DownstreamRoute.ReRoute.QosOptions);
+                .Build(context.Request.Method,
+                    DownstreamUrl,
+                    context.Request.Body,
+                    context.Request.Headers,
+                    context.Request.Cookies,
+                    context.Request.QueryString,
+                    context.Request.ContentType,
+                    new RequestId.RequestId(DownstreamRoute?.ReRoute?.RequestIdKey, context.TraceIdentifier),
+                    DownstreamRoute.ReRoute.IsQos,
+                    qosProvider.Data);
 
             if (buildResult.IsError)
             {
                 _logger.LogDebug("IRequestCreator returned an error, setting pipeline error");
 
                 SetPipelineError(buildResult.Errors);
+
                 return;
             }
             _logger.LogDebug("setting upstream request");

src/Ocelot/Request/Request.cs

@@ -2,22 +2,27 @@
 using Ocelot.Values;
 using System.Net;
 using System.Net.Http;
+using Ocelot.Requester.QoS;
 
 namespace Ocelot.Request
 {
     public class Request
     {
-        public Request(HttpRequestMessage httpRequestMessage, CookieContainer cookieContainer,bool isQos, QoSOptions qos)
+        public Request(
+            HttpRequestMessage httpRequestMessage, 
+            CookieContainer cookieContainer,
+            bool isQos,
+            IQoSProvider qosProvider)
         {
             HttpRequestMessage = httpRequestMessage;
             CookieContainer = cookieContainer;
             IsQos = isQos;
-            Qos = qos;
+            QosProvider = qosProvider;
         }
 
         public HttpRequestMessage HttpRequestMessage { get; private set; }
         public CookieContainer CookieContainer { get; private set; }
         public bool IsQos { get; private set; }
-        public QoSOptions Qos { get; private set; }
+        public IQoSProvider QosProvider { get; private set; }
     }
 }

src/Ocelot/Requester/CircuitBreakingDelegatingHandler.cs

@@ -1,77 +0,0 @@
-using Ocelot.Logging;
-using Polly;
-using Polly.CircuitBreaker;
-using Polly.Timeout;
-using System;
-using System.Net;
-using System.Net.Http;
-using System.Threading;
-using System.Threading.Tasks;
-
-namespace Ocelot.Requester
-{
-    public class CircuitBreakingDelegatingHandler : DelegatingHandler
-    {
-        private readonly IOcelotLogger _logger;
-        private readonly int _exceptionsAllowedBeforeBreaking;
-        private readonly TimeSpan _durationOfBreak;
-        private readonly Policy _circuitBreakerPolicy;
-        private readonly TimeoutPolicy _timeoutPolicy;
-
-        public CircuitBreakingDelegatingHandler(
-            int exceptionsAllowedBeforeBreaking, 
-            TimeSpan durationOfBreak,
-            TimeSpan timeoutValue,
-            TimeoutStrategy timeoutStrategy, 
-            IOcelotLogger logger, 
-            HttpMessageHandler innerHandler)
-            : base(innerHandler)
-        {
-            this._exceptionsAllowedBeforeBreaking = exceptionsAllowedBeforeBreaking;
-
-            this._durationOfBreak = durationOfBreak;
-
-            _circuitBreakerPolicy = Policy
-                .Handle<HttpRequestException>()
-                .Or<TimeoutRejectedException>()
-                .Or<TimeoutException>()
-                .CircuitBreakerAsync(
-                    exceptionsAllowedBeforeBreaking: exceptionsAllowedBeforeBreaking,
-                    durationOfBreak: durationOfBreak,
-                    onBreak: (ex, breakDelay) =>
-                    {
-                        _logger.LogError(".Breaker logging: Breaking the circuit for " + breakDelay.TotalMilliseconds + "ms!", ex);
-                    },
-                    onReset: () => _logger.LogDebug(".Breaker logging: Call ok! Closed the circuit again."),
-                    onHalfOpen: () => _logger.LogDebug(".Breaker logging: Half-open; next call is a trial.")
-                    );
-
-            _timeoutPolicy = Policy.TimeoutAsync(timeoutValue, timeoutStrategy);
-
-            _logger = logger;
-        }
-
-        protected override async Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
-        {
-            try
-            {
-                return await Policy.WrapAsync(_circuitBreakerPolicy, _timeoutPolicy).ExecuteAsync(() => base.SendAsync(request,cancellationToken));
-            }
-            catch (BrokenCircuitException ex)
-            {
-                _logger.LogError($"Reached to allowed number of exceptions. Circuit is open. AllowedExceptionCount: {_exceptionsAllowedBeforeBreaking}, DurationOfBreak: {_durationOfBreak}",ex);
-                throw;
-            }
-            catch (HttpRequestException ex)
-            {
-                _logger.LogError($"Error in CircuitBreakingDelegatingHandler.SendAync", ex);
-                throw;
-            }
-        }
-
-        private static bool IsTransientFailure(HttpResponseMessage result)
-        {
-            return result.StatusCode >= HttpStatusCode.InternalServerError;
-        }
-    }
-}

src/Ocelot/Requester/HttpClientBuilder.cs

@@ -1,35 +1,39 @@
-using Ocelot.Configuration;
-using Ocelot.Logging;
-using Ocelot.Values;
-using Polly.Timeout;
-using System;
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Net.Http;
-using System.Threading.Tasks;
+using Ocelot.Logging;
+using Ocelot.Requester.QoS;
 
 namespace Ocelot.Requester
 {
     internal class HttpClientBuilder
     {
-        private readonly Dictionary<int, Func<DelegatingHandler>> handlers = new Dictionary<int, Func<DelegatingHandler>>();
+        private readonly Dictionary<int, Func<DelegatingHandler>> _handlers = new Dictionary<int, Func<DelegatingHandler>>();
 
-        public HttpClientBuilder WithCircuitBreaker(QoSOptions qos, IOcelotLogger logger, HttpMessageHandler innerHandler)
+        public HttpClientBuilder WithQoS(IQoSProvider qoSProvider, IOcelotLogger logger, HttpMessageHandler innerHandler)
         {
-            handlers.Add(5000, () => new CircuitBreakingDelegatingHandler(qos.ExceptionsAllowedBeforeBreaking, qos.DurationOfBreak, qos.TimeoutValue, qos.TimeoutStrategy, logger, innerHandler));
+            _handlers.Add(5000, () => new PollyCircuitBreakingDelegatingHandler(qoSProvider, logger, innerHandler));
             return this;
         }
 
         internal HttpClient Build(HttpMessageHandler innerHandler)
         {
-            return handlers.Any() ? new HttpClient(CreateHttpMessageHandler()) : new HttpClient(innerHandler);
+            return _handlers.Any() ? 
+                new HttpClient(CreateHttpMessageHandler()) : 
+                new HttpClient(innerHandler);
         }
 
         private HttpMessageHandler CreateHttpMessageHandler()
         {
             HttpMessageHandler httpMessageHandler = new HttpClientHandler();
 
-            handlers.OrderByDescending(handler => handler.Key).Select(handler => handler.Value).Reverse().ToList().ForEach(handler =>
+            _handlers
+                .OrderByDescending(handler => handler.Key)
+                .Select(handler => handler.Value)
+                .Reverse()
+                .ToList()
+                .ForEach(handler =>
             {
                 var delegatingHandler = handler();
                 delegatingHandler.InnerHandler = httpMessageHandler;

src/Ocelot/Requester/HttpClientHttpRequester.cs

@@ -1,17 +1,17 @@
 using System;
-using System.Collections.Generic;
 using System.Net.Http;
 using System.Threading.Tasks;
-using Ocelot.Errors;
-using Ocelot.Responses;
 using Ocelot.Logging;
+using Ocelot.Responses;
+using Polly.CircuitBreaker;
+using Polly.Timeout;
 
 namespace Ocelot.Requester
 {
     public class HttpClientHttpRequester : IHttpRequester
     {
         private readonly IOcelotLogger _logger;
- 
+
         public HttpClientHttpRequester(IOcelotLoggerFactory loggerFactory)
         {
             _logger = loggerFactory.CreateLogger<HttpClientHttpRequester>();
@@ -19,13 +19,13 @@ namespace Ocelot.Requester
 
         public async Task<Response<HttpResponseMessage>> GetResponse(Request.Request request)
         {
-            HttpClientBuilder builder = new HttpClientBuilder();    
+            var builder = new HttpClientBuilder();    
 
             using (var handler = new HttpClientHandler { CookieContainer = request.CookieContainer })
             {
                 if (request.IsQos)
                 {
-                    builder.WithCircuitBreaker(request.Qos, _logger, handler);
+                    builder.WithQoS(request.QosProvider, _logger, handler);
                 }           
 
                 using (var httpClient = builder.Build(handler))
@@ -35,10 +35,15 @@ namespace Ocelot.Requester
                         var response = await httpClient.SendAsync(request.HttpRequestMessage);
                         return new OkResponse<HttpResponseMessage>(response);
                     }
-                    catch (Polly.Timeout.TimeoutRejectedException exception)
+                    catch (TimeoutRejectedException exception)
                     {
                         return
-                           new ErrorResponse<HttpResponseMessage>(new RequestTimedOutError(exception));
+                            new ErrorResponse<HttpResponseMessage>(new RequestTimedOutError(exception));
+                    }
+                    catch (BrokenCircuitException exception)
+                    {
+                        return
+                            new ErrorResponse<HttpResponseMessage>(new RequestTimedOutError(exception));
                     }
                     catch (Exception exception)
                     {

src/Ocelot/Requester/PollyCircuitBreakingDelegatingHandler.cs

@@ -0,0 +1,47 @@
+using System.Net.Http;
+using System.Threading;
+using System.Threading.Tasks;
+using Ocelot.Logging;
+using Ocelot.Requester.QoS;
+using Polly;
+using Polly.CircuitBreaker;
+using Polly.Timeout;
+
+namespace Ocelot.Requester
+{
+    public class PollyCircuitBreakingDelegatingHandler : DelegatingHandler
+    {
+        private readonly IQoSProvider _qoSProvider;
+        private readonly IOcelotLogger _logger;
+
+        public PollyCircuitBreakingDelegatingHandler(
+            IQoSProvider qoSProvider,
+            IOcelotLogger logger, 
+            HttpMessageHandler innerHandler)
+            : base(innerHandler)
+        {
+            _qoSProvider = qoSProvider;
+            _logger = logger;
+        }
+
+        protected override async Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
+        {
+            try
+            {
+                return await Policy
+                    .WrapAsync(_qoSProvider.CircuitBreaker.CircuitBreakerPolicy, _qoSProvider.CircuitBreaker.TimeoutPolicy)
+                    .ExecuteAsync(() => base.SendAsync(request,cancellationToken));
+            }
+            catch (BrokenCircuitException ex)
+            {
+                _logger.LogError($"Reached to allowed number of exceptions. Circuit is open",ex);
+                throw;
+            }
+            catch (HttpRequestException ex)
+            {
+                _logger.LogError($"Error in CircuitBreakingDelegatingHandler.SendAync", ex);
+                throw;
+            }
+        }
+    }
+}

src/Ocelot/Requester/QoS/IQoSProviderFactory.cs

@@ -0,0 +1,145 @@
+using System;
+using System.Collections.Generic;
+using System.Net.Http;
+using Ocelot.Configuration;
+using Ocelot.LoadBalancer.LoadBalancers;
+using Ocelot.Logging;
+using Ocelot.Responses;
+using Polly;
+using Polly.CircuitBreaker;
+using Polly.Timeout;
+
+namespace Ocelot.Requester.QoS
+{
+    public interface IQoSProviderFactory
+    {
+        IQoSProvider Get(ReRoute reRoute);
+    }
+
+    public class QoSProviderFactory : IQoSProviderFactory
+    {
+        private readonly IOcelotLoggerFactory _loggerFactory;
+
+        public QoSProviderFactory(IOcelotLoggerFactory loggerFactory)
+        {
+            _loggerFactory = loggerFactory;
+        }
+
+        public IQoSProvider Get(ReRoute reRoute)
+        {
+            if (reRoute.IsQos)
+            {
+                return new PollyQoSProvider(reRoute, _loggerFactory);
+            }
+
+            return new NoQoSProvider();
+        }
+    }
+
+    public interface IQoSProvider
+    {
+        CircuitBreaker CircuitBreaker { get; }
+    }
+
+    public class NoQoSProvider : IQoSProvider
+    {
+        public CircuitBreaker CircuitBreaker { get; }
+    }
+
+    public class PollyQoSProvider : IQoSProvider
+    {
+        private readonly CircuitBreakerPolicy _circuitBreakerPolicy;
+        private readonly TimeoutPolicy _timeoutPolicy;
+        private readonly IOcelotLogger _logger;
+        private readonly CircuitBreaker _circuitBreaker;
+
+        public PollyQoSProvider(ReRoute reRoute, IOcelotLoggerFactory loggerFactory)
+        {
+            _logger = loggerFactory.CreateLogger<PollyQoSProvider>();
+
+            _timeoutPolicy = Policy.TimeoutAsync(reRoute.QosOptions.TimeoutValue, reRoute.QosOptions.TimeoutStrategy);
+
+            _circuitBreakerPolicy = Policy
+                .Handle<HttpRequestException>()
+                .Or<TimeoutRejectedException>()
+                .Or<TimeoutException>()
+                .CircuitBreakerAsync(
+                    exceptionsAllowedBeforeBreaking: reRoute.QosOptions.ExceptionsAllowedBeforeBreaking,
+                    durationOfBreak: reRoute.QosOptions.DurationOfBreak,
+                    onBreak: (ex, breakDelay) =>
+                    {
+                        _logger.LogError(
+                            ".Breaker logging: Breaking the circuit for " + breakDelay.TotalMilliseconds + "ms!", ex);
+                    },
+                    onReset: () =>
+                    {
+                        _logger.LogDebug(".Breaker logging: Call ok! Closed the circuit again.");
+                    },
+                    onHalfOpen: () =>
+                    {
+                        _logger.LogDebug(".Breaker logging: Half-open; next call is a trial.");
+                    }
+                );
+
+            _circuitBreaker = new CircuitBreaker(_circuitBreakerPolicy, _timeoutPolicy);
+        }
+
+        public CircuitBreaker CircuitBreaker => _circuitBreaker;
+    }
+
+    public class CircuitBreaker
+    {
+        public CircuitBreaker(CircuitBreakerPolicy circuitBreakerPolicy, TimeoutPolicy timeoutPolicy)
+        {
+            CircuitBreakerPolicy = circuitBreakerPolicy;
+            TimeoutPolicy = timeoutPolicy;
+        }
+
+        public CircuitBreakerPolicy CircuitBreakerPolicy { get; private set; }
+        public TimeoutPolicy TimeoutPolicy { get; private set; }
+    }
+
+
+    public interface IQosProviderHouse
+    {
+        Response<IQoSProvider> Get(string key);
+        Response Add(string key, IQoSProvider loadBalancer);
+    }
+
+    public class QosProviderHouse : IQosProviderHouse
+    {
+        private readonly Dictionary<string, IQoSProvider> _qoSProviders;
+
+        public QosProviderHouse()
+        {
+            _qoSProviders = new Dictionary<string, IQoSProvider>();
+        }
+
+        public Response<IQoSProvider> Get(string key)
+        {
+            IQoSProvider qoSProvider;
+
+            if (_qoSProviders.TryGetValue(key, out qoSProvider))
+            {
+                return new OkResponse<IQoSProvider>(_qoSProviders[key]);
+            }
+
+            return new ErrorResponse<IQoSProvider>(new List<Ocelot.Errors.Error>()
+            {
+                new UnableToFindQoSProviderError($"unabe to find qos provider for {key}")
+            });
+        }
+
+        public Response Add(string key, IQoSProvider loadBalancer)
+        {
+            if (!_qoSProviders.ContainsKey(key))
+            {
+                _qoSProviders.Add(key, loadBalancer);
+            }
+
+            _qoSProviders.Remove(key);
+            _qoSProviders.Add(key, loadBalancer);
+            return new OkResponse();
+        }
+    }
+}

src/Ocelot/Requester/QoS/UnableToFindQoSProviderError.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using Ocelot.Errors;
+
+namespace Ocelot.Requester.QoS
+{
+    public class UnableToFindQoSProviderError : Error
+    {
+        public UnableToFindQoSProviderError(string message) 
+            : base(message, OcelotErrorCode.UnableToFindQoSProviderError)
+        {
+        }
+    }
+}

src/Ocelot/Responder/ErrorsToHttpStatusCodeMapper.cs

@@ -24,7 +24,7 @@ namespace Ocelot.Responder
 
             if (errors.Any(e => e.Code == OcelotErrorCode.RequestTimedOutError))
             {
-                return new OkResponse<int>(408);
+                return new OkResponse<int>(503);
             }
 
             return new OkResponse<int>(404);