Merge branch 'release/5.5.0'

src/Ocelot/Authentication/Middleware/AuthenticationMiddleware.cs

@@ -12,20 +12,19 @@ namespace Ocelot.Authentication.Middleware
     public class AuthenticationMiddleware : OcelotMiddleware
     {
         private readonly OcelotRequestDelegate _next;
-        private readonly IOcelotLogger _logger;
 
         public AuthenticationMiddleware(OcelotRequestDelegate next,
             IOcelotLoggerFactory loggerFactory)
+            : base(loggerFactory.CreateLogger<AuthenticationMiddleware>())
         {
             _next = next;
-            _logger = loggerFactory.CreateLogger<AuthenticationMiddleware>();
         }
 
         public async Task Invoke(DownstreamContext context)
         {
             if (IsAuthenticatedRoute(context.DownstreamReRoute))
             {
-                _logger.LogDebug($"{context.HttpContext.Request.Path} is an authenticated route. {MiddlewareName} checking if client is authenticated");
+                Logger.LogInformation($"{context.HttpContext.Request.Path} is an authenticated route. {MiddlewareName} checking if client is authenticated");
                 
                 var result = await context.HttpContext.AuthenticateAsync(context.DownstreamReRoute.AuthenticationOptions.AuthenticationProviderKey);
                 
@@ -33,25 +32,22 @@ namespace Ocelot.Authentication.Middleware
 
                 if (context.HttpContext.User.Identity.IsAuthenticated)
                 {
-                    _logger.LogDebug($"Client has been authenticated for {context.HttpContext.Request.Path}");
+                    Logger.LogInformation($"Client has been authenticated for {context.HttpContext.Request.Path}");
                     await _next.Invoke(context);
                 }
                 else
                 {
-                    var error = new List<Error>
+                    var error = new UnauthenticatedError(
-                    {
+                        $"Request for authenticated route {context.HttpContext.Request.Path} by {context.HttpContext.User.Identity.Name} was unauthenticated");
-                        new UnauthenticatedError(
-                            $"Request for authenticated route {context.HttpContext.Request.Path} by {context.HttpContext.User.Identity.Name} was unauthenticated")
-                    };
 
-                    _logger.LogError($"Client has NOT been authenticated for {context.HttpContext.Request.Path} and pipeline error set. {error.ToErrorString()}");
+                    Logger.LogWarning($"Client has NOT been authenticated for {context.HttpContext.Request.Path} and pipeline error set. {error}");
                     
                     SetPipelineError(context, error);
                 }
             }
             else
             {
-                _logger.LogTrace($"No authentication needed for {context.HttpContext.Request.Path}");
+                Logger.LogInformation($"No authentication needed for {context.HttpContext.Request.Path}");
 
                 await _next.Invoke(context);
             }

src/Ocelot/Authorisation/ClaimsAuthoriser.cs

@@ -1,6 +1,5 @@
 using System.Collections.Generic;
 using System.Security.Claims;
-using Ocelot.Errors;
 using Ocelot.Responses;
 
 namespace Ocelot.Authorisation
@@ -32,19 +31,13 @@ namespace Ocelot.Authorisation
                     var authorised = values.Data.Contains(required.Value);
                     if (!authorised)
                     {
-                        return new ErrorResponse<bool>(new List<Error>
+                        return new ErrorResponse<bool>(new ClaimValueNotAuthorisedError(
-                        {
+                                $"claim value: {values.Data} is not the same as required value: {required.Value} for type: {required.Key}"));
-                            new ClaimValueNotAuthorisedError(
-                                $"claim value: {values.Data} is not the same as required value: {required.Value} for type: {required.Key}")
-                        });
                     }
                 }
                 else
                 {
-                    return new ErrorResponse<bool>(new List<Error>
+                    return new ErrorResponse<bool>(new UserDoesNotHaveClaimError($"user does not have claim {required.Key}"));
-                        {
-                            new UserDoesNotHaveClaimError($"user does not have claim {required.Key}")
-                        });
                 }
             }
 

src/Ocelot/Authorisation/Middleware/AuthorisationMiddleware.cs

@@ -13,30 +13,29 @@
         private readonly OcelotRequestDelegate _next;
         private readonly IClaimsAuthoriser _claimsAuthoriser;
         private readonly IScopesAuthoriser _scopesAuthoriser;
-        private readonly IOcelotLogger _logger;
 
         public AuthorisationMiddleware(OcelotRequestDelegate next,
             IClaimsAuthoriser claimsAuthoriser,
             IScopesAuthoriser scopesAuthoriser,
             IOcelotLoggerFactory loggerFactory)
+            :base(loggerFactory.CreateLogger<AuthorisationMiddleware>())
         {
             _next = next;
             _claimsAuthoriser = claimsAuthoriser;
             _scopesAuthoriser = scopesAuthoriser;
-            _logger = loggerFactory.CreateLogger<AuthorisationMiddleware>();
         }
 
         public async Task Invoke(DownstreamContext context)
         {
             if (IsAuthenticatedRoute(context.DownstreamReRoute))
             {
-                _logger.LogDebug("route is authenticated scopes must be checked");
+                Logger.LogInformation("route is authenticated scopes must be checked");
 
                 var authorised = _scopesAuthoriser.Authorise(context.HttpContext.User, context.DownstreamReRoute.AuthenticationOptions.AllowedScopes);
 
                 if (authorised.IsError)
                 {
-                    _logger.LogDebug("error authorising user scopes");
+                    Logger.LogWarning("error authorising user scopes");
 
                     SetPipelineError(context, authorised.Errors);
                     return;
@@ -44,29 +43,26 @@
 
                 if (IsAuthorised(authorised))
                 {
-                    _logger.LogDebug("user scopes is authorised calling next authorisation checks");
+                    Logger.LogInformation("user scopes is authorised calling next authorisation checks");
                 }
                 else
                 {
-                    _logger.LogDebug("user scopes is not authorised setting pipeline error");
+                    Logger.LogWarning("user scopes is not authorised setting pipeline error");
 
-                    SetPipelineError(context, new List<Error>
+                    SetPipelineError(context, new UnauthorisedError(
-                    {
+                            $"{context.HttpContext.User.Identity.Name} unable to access {context.DownstreamReRoute.UpstreamPathTemplate.Value}"));
-                        new UnauthorisedError(
-                            $"{context.HttpContext.User.Identity.Name} unable to access {context.DownstreamReRoute.UpstreamPathTemplate.Value}")
-                    });
                 }
             }
 
             if (IsAuthorisedRoute(context.DownstreamReRoute))
             {
-                _logger.LogDebug("route is authorised");
+                Logger.LogInformation("route is authorised");
 
                 var authorised = _claimsAuthoriser.Authorise(context.HttpContext.User, context.DownstreamReRoute.RouteClaimsRequirement);
 
                 if (authorised.IsError)
                 {
-                    _logger.LogDebug($"Error whilst authorising {context.HttpContext.User.Identity.Name} for {context.HttpContext.User.Identity.Name}. Setting pipeline error");
+                    Logger.LogWarning($"Error whilst authorising {context.HttpContext.User.Identity.Name}. Setting pipeline error");
 
                     SetPipelineError(context, authorised.Errors);
                     return;
@@ -74,22 +70,19 @@
 
                 if (IsAuthorised(authorised))
                 {
-                    _logger.LogDebug($"{context.HttpContext.User.Identity.Name} has succesfully been authorised for {context.DownstreamReRoute.UpstreamPathTemplate.Value}. Calling next middleware");
+                    Logger.LogInformation($"{context.HttpContext.User.Identity.Name} has succesfully been authorised for {context.DownstreamReRoute.UpstreamPathTemplate.Value}.");
                     await _next.Invoke(context);
                 }
                 else
                 {
-                    _logger.LogDebug($"{context.HttpContext.User.Identity.Name} is not authorised to access {context.DownstreamReRoute.UpstreamPathTemplate.Value}. Setting pipeline error");
+                    Logger.LogWarning($"{context.HttpContext.User.Identity.Name} is not authorised to access {context.DownstreamReRoute.UpstreamPathTemplate.Value}. Setting pipeline error");
 
-                    SetPipelineError(context, new List<Error>
+                    SetPipelineError(context, new UnauthorisedError($"{context.HttpContext.User.Identity.Name} is not authorised to access {context.DownstreamReRoute.UpstreamPathTemplate.Value}"));
-                    {
-                        new UnauthorisedError($"{context.HttpContext.User.Identity.Name} is not authorised to access {context.DownstreamReRoute.UpstreamPathTemplate.Value}")
-                    });
                 }
             }
             else
             {
-                _logger.LogDebug($"{context.DownstreamReRoute.DownstreamPathTemplate.Value} route does not require user to be authorised");
+                Logger.LogInformation($"{context.DownstreamReRoute.DownstreamPathTemplate.Value} route does not require user to be authorised");
                 await _next.Invoke(context);
             }
         }

src/Ocelot/Authorisation/ScopesAuthoriser.cs

@@ -1,5 +1,4 @@
 using IdentityModel;
-using Ocelot.Errors;
 using Ocelot.Responses;
 using System.Collections.Generic;
 using System.Security.Claims;
@@ -38,11 +37,8 @@ namespace Ocelot.Authorisation
 
             if (matchesScopes.Count == 0)
             {
-                return new ErrorResponse<bool>(new List<Error>
+                return new ErrorResponse<bool>(
-                {
+                    new ScopeNotAuthorisedError($"no one user scope: '{string.Join(",", userScopes)}' match with some allowed scope: '{string.Join(",", routeAllowedScopes)}'"));
-                     new ScopeNotAuthorisedError(
-                         $"no one user scope: '{string.Join(",", userScopes)}' match with some allowed scope: '{string.Join(",", routeAllowedScopes)}'")
-                });
             }
 
             return new OkResponse<bool>(true);

src/Ocelot/Cache/Middleware/OutputCacheMiddleware.cs

@@ -14,7 +14,6 @@ namespace Ocelot.Cache.Middleware
     public class OutputCacheMiddleware : OcelotMiddleware
     {
         private readonly OcelotRequestDelegate _next;
-        private readonly IOcelotLogger _logger;
         private readonly IOcelotCache<CachedResponse> _outputCache;
         private readonly IRegionCreator _regionCreator;
 
@@ -22,10 +21,10 @@ namespace Ocelot.Cache.Middleware
             IOcelotLoggerFactory loggerFactory,
             IOcelotCache<CachedResponse> outputCache,
             IRegionCreator regionCreator)
+                :base(loggerFactory.CreateLogger<OutputCacheMiddleware>())
         {
             _next = next;
             _outputCache = outputCache;
-            _logger = loggerFactory.CreateLogger<OutputCacheMiddleware>();
             _regionCreator = regionCreator;
         }
 
@@ -39,29 +38,29 @@ namespace Ocelot.Cache.Middleware
 
             var downstreamUrlKey = $"{context.DownstreamRequest.Method}-{context.DownstreamRequest.OriginalString}";
 
-            _logger.LogDebug("started checking cache for {downstreamUrlKey}", downstreamUrlKey);
+            Logger.LogDebug($"Started checking cache for {downstreamUrlKey}");
 
             var cached = _outputCache.Get(downstreamUrlKey, context.DownstreamReRoute.CacheOptions.Region);
 
             if (cached != null)
             {
-                _logger.LogDebug("cache entry exists for {downstreamUrlKey}", downstreamUrlKey);
+                Logger.LogDebug($"cache entry exists for {downstreamUrlKey}");
 
                 var response = CreateHttpResponseMessage(cached);
                 SetHttpResponseMessageThisRequest(context, response);
 
-                _logger.LogDebug("finished returned cached response for {downstreamUrlKey}", downstreamUrlKey);
+                Logger.LogDebug($"finished returned cached response for {downstreamUrlKey}");
 
                 return;
             }
 
-            _logger.LogDebug("no resonse cached for {downstreamUrlKey}", downstreamUrlKey);
+            Logger.LogDebug($"no resonse cached for {downstreamUrlKey}");
 
             await _next.Invoke(context);
 
             if (context.IsError)
             {
-                _logger.LogDebug("there was a pipeline error for {downstreamUrlKey}", downstreamUrlKey);
+                Logger.LogDebug($"there was a pipeline error for {downstreamUrlKey}");
 
                 return;
             }
@@ -70,7 +69,7 @@ namespace Ocelot.Cache.Middleware
 
             _outputCache.Add(downstreamUrlKey, cached, TimeSpan.FromSeconds(context.DownstreamReRoute.CacheOptions.TtlSeconds), context.DownstreamReRoute.CacheOptions.Region);
 
-            _logger.LogDebug("finished response added to cache for {downstreamUrlKey}", downstreamUrlKey);
+            Logger.LogDebug($"finished response added to cache for {downstreamUrlKey}");
         }
 
         private void SetHttpResponseMessageThisRequest(DownstreamContext context, HttpResponseMessage response)

src/Ocelot/Claims/Middleware/ClaimsBuilderMiddleware.cs

@@ -12,28 +12,27 @@ namespace Ocelot.Claims.Middleware
     {
         private readonly OcelotRequestDelegate _next;
         private readonly IAddClaimsToRequest _addClaimsToRequest;
-        private readonly IOcelotLogger _logger;
 
         public ClaimsBuilderMiddleware(OcelotRequestDelegate next, 
             IOcelotLoggerFactory loggerFactory,
             IAddClaimsToRequest addClaimsToRequest) 
+                :base(loggerFactory.CreateLogger<ClaimsBuilderMiddleware>())
         {
             _next = next;
             _addClaimsToRequest = addClaimsToRequest;
-            _logger = loggerFactory.CreateLogger<ClaimsBuilderMiddleware>();
         }
 
         public async Task Invoke(DownstreamContext context)
         {
             if (context.DownstreamReRoute.ClaimsToClaims.Any())
             {
-                _logger.LogDebug("this route has instructions to convert claims to other claims");
+                Logger.LogDebug("this route has instructions to convert claims to other claims");
 
                 var result = _addClaimsToRequest.SetClaimsOnContext(context.DownstreamReRoute.ClaimsToClaims, context.HttpContext);
 
                 if (result.IsError)
                 {
-                    _logger.LogDebug("error converting claims to other claims, setting pipeline error");
+                    Logger.LogDebug("error converting claims to other claims, setting pipeline error");
 
                     SetPipelineError(context, result.Errors);
                     return;

src/Ocelot/Configuration/Creator/ClaimsToThingCreator.cs

@@ -26,8 +26,7 @@ namespace Ocelot.Configuration.Creator
 
                 if (claimToThing.IsError)
                 {
-                    _logger.LogDebug("ClaimsToThingCreator.BuildAddThingsToRequest",
+                    _logger.LogDebug($"Unable to extract configuration for key: {input.Key} and value: {input.Value} your configuration file is incorrect");
-                        $"Unable to extract configuration for key: {input.Key} and value: {input.Value} your configuration file is incorrect");
                 }
                 else
                 {

src/Ocelot/Configuration/Creator/HeaderFindAndReplaceCreator.cs

@@ -32,7 +32,7 @@ namespace Ocelot.Configuration.Creator
                 }
                 else
                 {
-                    _logger.LogError($"Unable to add UpstreamHeaderTransform {input.Key}: {input.Value}");
+                    _logger.LogWarning($"Unable to add UpstreamHeaderTransform {input.Key}: {input.Value}");
                 }
             }
 
@@ -50,7 +50,7 @@ namespace Ocelot.Configuration.Creator
                     }
                     else
                     {
-                        _logger.LogError($"Unable to add DownstreamHeaderTransform {input.Key}: {input.Value}");
+                        _logger.LogWarning($"Unable to add DownstreamHeaderTransform {input.Key}: {input.Value}");
                     }
                 }
                 else

src/Ocelot/Configuration/Parser/ClaimToThingConfigurationParser.cs

@@ -20,22 +20,14 @@ namespace Ocelot.Configuration.Parser
 
                 if (instructions.Length <= 1)
                 {
-                    return new ErrorResponse<ClaimToThing>(
+                    return new ErrorResponse<ClaimToThing>(new NoInstructionsError(SplitToken));
-                        new List<Error>
-                    {
-                        new NoInstructionsError(SplitToken)
-                    });
                 }
 
                 var claimMatch = _claimRegex.IsMatch(instructions[0]);
 
                 if (!claimMatch)
                 {
-                    return new ErrorResponse<ClaimToThing>(
+                    return new ErrorResponse<ClaimToThing>(new InstructionNotForClaimsError());
-                        new List<Error>
-                        {
-                            new InstructionNotForClaimsError()
-                        });
                 }
 
                 var newKey = GetIndexValue(instructions[0]);
@@ -53,11 +45,7 @@ namespace Ocelot.Configuration.Parser
             }
             catch (Exception exception)
             {
-                return new ErrorResponse<ClaimToThing>(
+                return new ErrorResponse<ClaimToThing>(new ParsingConfigurationHeaderError(exception));
-                    new List<Error>
-                    {
-                        new ParsingConfigurationHeaderError(exception)
-                    });
             }
         }
 

src/Ocelot/Configuration/Repository/ConsulFileConfigurationPoller.cs

@@ -45,13 +45,13 @@ namespace Ocelot.Configuration.Repository
         
         private async Task Poll()
         {
-            _logger.LogDebug("Started polling consul");
+            _logger.LogInformation("Started polling consul");
 
             var fileConfig = await _repo.Get();
 
             if(fileConfig.IsError)
             {
-                _logger.LogDebug($"error geting file config, errors are {string.Join(",", fileConfig.Errors.Select(x => x.Message))}");
+                _logger.LogWarning($"error geting file config, errors are {string.Join(",", fileConfig.Errors.Select(x => x.Message))}");
                 return;
             }
 
@@ -63,7 +63,7 @@ namespace Ocelot.Configuration.Repository
                 _previousAsJson = asJson;
             }
 
-            _logger.LogDebug("Finished polling consul");
+            _logger.LogInformation("Finished polling consul");
         }
 
         /// <summary>

src/Ocelot/Configuration/Validator/ConfigurationValidationResult.cs

@@ -17,8 +17,8 @@ namespace Ocelot.Configuration.Validator
             Errors = errors;
         }
 
-        public bool IsError { get; private set; }
+        public bool IsError { get; }
 
-        public List<Error> Errors { get; private set; } 
+        public List<Error> Errors { get; } 
     }
 }

src/Ocelot/DownstreamRouteFinder/Finder/DownstreamRouteFinder.cs

@@ -44,10 +44,7 @@ namespace Ocelot.DownstreamRouteFinder.Finder
                 return notNullOption != null ? new OkResponse<DownstreamRoute>(notNullOption) : new OkResponse<DownstreamRoute>(nullOption);
             }
 
-            return new ErrorResponse<DownstreamRoute>(new List<Error>
+            return new ErrorResponse<DownstreamRoute>(new UnableToFindDownstreamRouteError(path, httpMethod));
-            {
-                new UnableToFindDownstreamRouteError()
-            });
         }
 
         private bool RouteIsApplicableToThisRequest(ReRoute reRoute, string httpMethod, string upstreamHost)

src/Ocelot/DownstreamRouteFinder/Finder/UnableToFindDownstreamRouteError.cs

@@ -4,7 +4,8 @@ namespace Ocelot.DownstreamRouteFinder.Finder
 {
     public class UnableToFindDownstreamRouteError : Error
     {
-        public UnableToFindDownstreamRouteError() : base("UnableToFindDownstreamRouteError", OcelotErrorCode.UnableToFindDownstreamRouteError)
+        public UnableToFindDownstreamRouteError(string path, string httpVerb) 
+            : base($"Unable to find downstream route for path: {path}, verb: {httpVerb}", OcelotErrorCode.UnableToFindDownstreamRouteError)
         {
         }
     }

src/Ocelot/DownstreamRouteFinder/Middleware/DownstreamRouteFinderMiddleware.cs

@@ -1,4 +1,5 @@
 using System.Threading.Tasks;
+using System.Linq;
 using Ocelot.Configuration;
 using Ocelot.Configuration.Provider;
 using Ocelot.DownstreamRouteFinder.Finder;
@@ -13,7 +14,6 @@ namespace Ocelot.DownstreamRouteFinder.Middleware
     {
         private readonly OcelotRequestDelegate _next;
         private readonly IDownstreamRouteFinder _downstreamRouteFinder;
-        private readonly IOcelotLogger _logger;
         private readonly IOcelotConfigurationProvider _configProvider;
         private readonly IMultiplexer _multiplexer;
 
@@ -22,12 +22,12 @@ namespace Ocelot.DownstreamRouteFinder.Middleware
             IDownstreamRouteFinder downstreamRouteFinder,
             IOcelotConfigurationProvider configProvider,
             IMultiplexer multiplexer)
+                :base(loggerFactory.CreateLogger<DownstreamRouteFinderMiddleware>())
         {
             _configProvider = configProvider;
             _multiplexer = multiplexer;
             _next = next;
             _downstreamRouteFinder = downstreamRouteFinder;
-            _logger = loggerFactory.CreateLogger<DownstreamRouteFinderMiddleware>();
         }
 
         public async Task Invoke(DownstreamContext context)
@@ -40,27 +40,27 @@ namespace Ocelot.DownstreamRouteFinder.Middleware
 
             if (configuration.IsError)
             {
-                _logger.LogError($"{MiddlewareName} setting pipeline errors. IOcelotConfigurationProvider returned {configuration.Errors.ToErrorString()}");
+                Logger.LogWarning($"{MiddlewareName} setting pipeline errors. IOcelotConfigurationProvider returned {configuration.Errors.ToErrorString()}");
                 SetPipelineError(context, configuration.Errors);
                 return;
             }
 
             context.ServiceProviderConfiguration = configuration.Data.ServiceProviderConfiguration;
 
-            _logger.LogDebug("upstream url path is {upstreamUrlPath}", upstreamUrlPath);
+            Logger.LogDebug($"Upstream url path is {upstreamUrlPath}");
 
             var downstreamRoute = _downstreamRouteFinder.FindDownstreamRoute(upstreamUrlPath, context.HttpContext.Request.Method, configuration.Data, upstreamHost);
 
             if (downstreamRoute.IsError)
             {
-                _logger.LogError($"{MiddlewareName} setting pipeline errors. IDownstreamRouteFinder returned {downstreamRoute.Errors.ToErrorString()}");
+                Logger.LogWarning($"{MiddlewareName} setting pipeline errors. IDownstreamRouteFinder returned {downstreamRoute.Errors.ToErrorString()}");
 
                 SetPipelineError(context, downstreamRoute.Errors);
                 return;
             }            
             
-            // todo - put this back in
+            var downstreamPathTemplates = string.Join(", ", downstreamRoute.Data.ReRoute.DownstreamReRoute.Select(r => r.DownstreamPathTemplate.Value));
-            //// _logger.LogDebug("downstream template is {downstreamRoute.Data.ReRoute.DownstreamPath}", downstreamRoute.Data.ReRoute.DownstreamReRoute.DownstreamPathTemplate);
+            Logger.LogDebug($"downstream templates are {downstreamPathTemplates}");
 
             context.TemplatePlaceholderNameAndValues = downstreamRoute.Data.TemplatePlaceholderNameAndValues;
 

src/Ocelot/DownstreamUrlCreator/IUrlBuilder.cs

@@ -1,12 +0,0 @@
-/*
-using Ocelot.Responses;
-using Ocelot.Values;
-
-namespace Ocelot.DownstreamUrlCreator
-{
-    public interface IUrlBuilder
-    {
-        Response<DownstreamUrl> Build(string downstreamPath, string downstreamScheme, ServiceHostAndPort downstreamHostAndPort);
-    }
-}
-*/

src/Ocelot/DownstreamUrlCreator/Middleware/DownstreamUrlCreatorMiddleware.cs

@@ -16,15 +16,14 @@ namespace Ocelot.DownstreamUrlCreator.Middleware
     {
         private readonly OcelotRequestDelegate _next;
         private readonly IDownstreamPathPlaceholderReplacer _replacer;
-        private readonly IOcelotLogger _logger;
 
         public DownstreamUrlCreatorMiddleware(OcelotRequestDelegate next,
             IOcelotLoggerFactory loggerFactory,
             IDownstreamPathPlaceholderReplacer replacer)
+                :base(loggerFactory.CreateLogger<DownstreamUrlCreatorMiddleware>())
         {
             _next = next;
             _replacer = replacer;
-            _logger = loggerFactory.CreateLogger<DownstreamUrlCreatorMiddleware>();
         }
 
         public async Task Invoke(DownstreamContext context)
@@ -34,7 +33,7 @@ namespace Ocelot.DownstreamUrlCreator.Middleware
 
             if (dsPath.IsError)
             {
-                _logger.LogDebug("IDownstreamPathPlaceholderReplacer returned an error, setting pipeline error");
+                Logger.LogDebug("IDownstreamPathPlaceholderReplacer returned an error, setting pipeline error");
 
                 SetPipelineError(context, dsPath.Errors);
                 return;
@@ -53,7 +52,7 @@ namespace Ocelot.DownstreamUrlCreator.Middleware
                 context.DownstreamRequest.AbsolutePath = dsPath.Data.Value;
             }
 
-            _logger.LogDebug("downstream url is {context.DownstreamRequest}", context.DownstreamRequest);
+            Logger.LogDebug($"Downstream url is {context.DownstreamRequest}");
 
             await _next.Invoke(context);
         }

src/Ocelot/DownstreamUrlCreator/UrlBuilder.cs

@@ -1,47 +0,0 @@
-/*
-using System;
-using System.Collections.Generic;
-using Ocelot.Errors;
-using Ocelot.Responses;
-using Ocelot.Values;
-
-namespace Ocelot.DownstreamUrlCreator
-{
-    public class UrlBuilder : IUrlBuilder
-    {
-        public Response<DownstreamUrl> Build(string downstreamPath, string downstreamScheme, ServiceHostAndPort downstreamHostAndPort)
-        {
-            if (string.IsNullOrEmpty(downstreamPath))
-            {
-                return new ErrorResponse<DownstreamUrl>(new List<Error> {new DownstreamPathNullOrEmptyError()});
-            }
-
-            if (string.IsNullOrEmpty(downstreamScheme))
-            {
-                return new ErrorResponse<DownstreamUrl>(new List<Error> { new DownstreamSchemeNullOrEmptyError() });
-            }
-
-            if (string.IsNullOrEmpty(downstreamHostAndPort.DownstreamHost))
-            {
-                return new ErrorResponse<DownstreamUrl>(new List<Error> { new DownstreamHostNullOrEmptyError() });
-            }
-
-            var builder = new UriBuilder
-            {
-                Host = downstreamHostAndPort.DownstreamHost,
-                Path = downstreamPath,
-                Scheme = downstreamScheme,
-            };
-
-            if (downstreamHostAndPort.DownstreamPort > 0)
-            {
-                builder.Port = downstreamHostAndPort.DownstreamPort;
-            }
-            
-            var url = builder.Uri.ToString();
-
-            return new OkResponse<DownstreamUrl>(new DownstreamUrl(url));
-        }
-    }
-}
-*/

src/Ocelot/Errors/Middleware/ExceptionHandlerMiddleware.cs

@@ -18,7 +18,6 @@ namespace Ocelot.Errors.Middleware
     public class ExceptionHandlerMiddleware : OcelotMiddleware
     {
         private readonly OcelotRequestDelegate _next;
-        private readonly IOcelotLogger _logger;
         private readonly IOcelotConfigurationProvider _provider;
         private readonly IRequestScopedDataRepository _repo;
 
@@ -26,11 +25,11 @@ namespace Ocelot.Errors.Middleware
             IOcelotLoggerFactory loggerFactory, 
             IOcelotConfigurationProvider provider, 
             IRequestScopedDataRepository repo)
+                : base(loggerFactory.CreateLogger<ExceptionHandlerMiddleware>())
         {
             _provider = provider;
             _repo = repo;
             _next = next;
-            _logger = loggerFactory.CreateLogger<ExceptionHandlerMiddleware>();
         }
 
         public async Task Invoke(DownstreamContext context)
@@ -39,22 +38,22 @@ namespace Ocelot.Errors.Middleware
             {               
                 await TrySetGlobalRequestId(context);
 
-                _logger.LogDebug("ocelot pipeline started");
+                Logger.LogDebug("ocelot pipeline started");
 
                 await _next.Invoke(context);
             }
             catch (Exception e)
             {
-                _logger.LogDebug("error calling middleware");
+                Logger.LogDebug("error calling middleware");
 
                 var message = CreateMessage(context, e);
 
-                _logger.LogError(message, e);
+                Logger.LogError(message, e);
                 
                 SetInternalServerErrorOnResponse(context);
             }
 
-            _logger.LogDebug("ocelot pipeline finished");
+            Logger.LogDebug("ocelot pipeline finished");
         }
 
         private async Task TrySetGlobalRequestId(DownstreamContext context)
@@ -64,22 +63,19 @@ namespace Ocelot.Errors.Middleware
             //first thing is get config
             var configuration = await _provider.Get(); 
             
-                //if error throw to catch below..
             if(configuration.IsError)
             {
                 throw new Exception($"{MiddlewareName} setting pipeline errors. IOcelotConfigurationProvider returned {configuration.Errors.ToErrorString()}");
             }
 
-                //else set the request id?
             var key = configuration.Data.RequestId;
 
-                StringValues upstreamRequestIds;
+            if (!string.IsNullOrEmpty(key) && context.HttpContext.Request.Headers.TryGetValue(key, out var upstreamRequestIds))
-                if (!string.IsNullOrEmpty(key) && context.HttpContext.Request.Headers.TryGetValue(key, out upstreamRequestIds))
             {
-                    //todo fix looking in both places
                 context.HttpContext.TraceIdentifier = upstreamRequestIds.First();
-                    _repo.Add<string>("RequestId", context.HttpContext.TraceIdentifier);
             }
+
+            _repo.Add("RequestId", context.HttpContext.TraceIdentifier);
         }
 
         private void SetInternalServerErrorOnResponse(DownstreamContext context)

src/Ocelot/Headers/AddHeadersToResponse.cs

@@ -27,7 +27,7 @@ namespace Ocelot.Headers
                     
                     if(value.IsError)
                     {
-                        _logger.LogError($"Unable to add header to response {add.Key}: {add.Value}");
+                        _logger.LogWarning($"Unable to add header to response {add.Key}: {add.Value}");
                         continue;
                     }
 

src/Ocelot/Headers/Middleware/HttpHeadersTransformationMiddleware.cs

@@ -10,7 +10,6 @@ namespace Ocelot.Headers.Middleware
     public class HttpHeadersTransformationMiddleware : OcelotMiddleware
     {
         private readonly OcelotRequestDelegate _next;
-        private readonly IOcelotLogger _logger;
         private readonly IHttpContextRequestHeaderReplacer _preReplacer;
         private readonly IHttpResponseHeaderReplacer _postReplacer;
         private readonly IAddHeadersToResponse _addHeaders;
@@ -20,12 +19,12 @@ namespace Ocelot.Headers.Middleware
             IHttpContextRequestHeaderReplacer preReplacer,
             IHttpResponseHeaderReplacer postReplacer,
             IAddHeadersToResponse addHeaders) 
+                :base(loggerFactory.CreateLogger<HttpHeadersTransformationMiddleware>())
         {
             _addHeaders = addHeaders;
             _next = next;
             _postReplacer = postReplacer;
             _preReplacer = preReplacer;
-            _logger = loggerFactory.CreateLogger<HttpHeadersTransformationMiddleware>();
         }
 
         public async Task Invoke(DownstreamContext context)

src/Ocelot/Headers/Middleware/HttpRequestHeadersBuilderMiddleware.cs

@@ -12,34 +12,33 @@ namespace Ocelot.Headers.Middleware
     {
         private readonly OcelotRequestDelegate _next;
         private readonly IAddHeadersToRequest _addHeadersToRequest;
-        private readonly IOcelotLogger _logger;
 
         public HttpRequestHeadersBuilderMiddleware(OcelotRequestDelegate next,
             IOcelotLoggerFactory loggerFactory,
             IAddHeadersToRequest addHeadersToRequest)  
+                :base(loggerFactory.CreateLogger<HttpRequestHeadersBuilderMiddleware>())
         {
             _next = next;
             _addHeadersToRequest = addHeadersToRequest;
-            _logger = loggerFactory.CreateLogger<HttpRequestHeadersBuilderMiddleware>();
         }
 
         public async Task Invoke(DownstreamContext context)
         {
             if (context.DownstreamReRoute.ClaimsToHeaders.Any())
             {
-                _logger.LogDebug($"{ context.DownstreamReRoute.DownstreamPathTemplate.Value} has instructions to convert claims to headers");
+                Logger.LogInformation($"{context.DownstreamReRoute.DownstreamPathTemplate.Value} has instructions to convert claims to headers");
 
                 var response = _addHeadersToRequest.SetHeadersOnDownstreamRequest(context.DownstreamReRoute.ClaimsToHeaders, context.HttpContext.User.Claims, context.DownstreamRequest);
 
                 if (response.IsError)
                 {
-                    _logger.LogDebug("Error setting headers on context, setting pipeline error");
+                    Logger.LogWarning("Error setting headers on context, setting pipeline error");
 
                     SetPipelineError(context, response.Errors);
                     return;
                 }
 
-                _logger.LogDebug("headers have been set on context");
+                Logger.LogInformation("headers have been set on context");
             }
 
             await _next.Invoke(context);

src/Ocelot/Infrastructure/Claims/Parser/ClaimsParser.cs

@@ -26,10 +26,7 @@
 
             if (splits.Length < index || index < 0)
             {
-                return new ErrorResponse<string>(new List<Error>
+                return new ErrorResponse<string>(new CannotFindClaimError($"Cannot find claim for key: {key}, delimiter: {delimiter}, index: {index}"));
-                {
-                    new CannotFindClaimError($"Cannot find claim for key: {key}, delimiter: {delimiter}, index: {index}")
-                });
             }
 
             var value = splits[index];
@@ -55,10 +52,7 @@
                 return new OkResponse<string>(claim.Value);
             }
 
-            return new ErrorResponse<string>(new List<Error>
+            return new ErrorResponse<string>(new CannotFindClaimError($"Cannot find claim for key: {key}"));
-            {
-                new CannotFindClaimError($"Cannot find claim for key: {key}")
-            });
         }
     }
 }

src/Ocelot/Infrastructure/Extensions/StringValuesExtensions.cs

@@ -3,7 +3,7 @@ using System.Linq;
 
 namespace Ocelot.Infrastructure.Extensions
 {
-    internal static class StringValueExtensions
+    internal static class StringValuesExtensions
     {
         public static string GetValue(this StringValues stringValues)
         {
@@ -11,6 +11,7 @@ namespace Ocelot.Infrastructure.Extensions
             {
                 return stringValues;
             }
+
             return stringValues.ToArray().LastOrDefault();
         }
     }

src/Ocelot/Infrastructure/RequestData/HttpDataRepository.cs

@@ -24,10 +24,7 @@ namespace Ocelot.Infrastructure.RequestData
             }
             catch (Exception exception)
             {
-                return new ErrorResponse(new List<Error>
+                return new ErrorResponse(new CannotAddDataError(string.Format($"Unable to add data for key: {key}, exception: {exception.Message}")));
-                {
-                    new CannotAddDataError(string.Format($"Unable to add data for key: {key}, exception: {exception.Message}"))
-                });
             }
         }
 
@@ -40,10 +37,7 @@ namespace Ocelot.Infrastructure.RequestData
             }
             catch (Exception exception)
             {
-                return new ErrorResponse(new List<Error>
+                return new ErrorResponse(new CannotAddDataError(string.Format($"Unable to update data for key: {key}, exception: {exception.Message}")));
-                {
-                    new CannotAddDataError(string.Format($"Unable to update data for key: {key}, exception: {exception.Message}"))
-                });
             }
         }
 
@@ -53,10 +47,7 @@ namespace Ocelot.Infrastructure.RequestData
 
             if(_httpContextAccessor.HttpContext == null || _httpContextAccessor.HttpContext.Items == null)
             {
-                return new ErrorResponse<T>(new List<Error>
+                return new ErrorResponse<T>(new CannotFindDataError($"Unable to find data for key: {key} because HttpContext or HttpContext.Items is null"));
-                {
-                    new CannotFindDataError($"Unable to find data for key: {key} because HttpContext or HttpContext.Items is null")
-                });
             }
 
             if(_httpContextAccessor.HttpContext.Items.TryGetValue(key, out obj))
@@ -65,10 +56,7 @@ namespace Ocelot.Infrastructure.RequestData
                 return new OkResponse<T>(data);
             }
 
-            return new ErrorResponse<T>(new List<Error>
+            return new ErrorResponse<T>(new CannotFindDataError($"Unable to find data for key: {key}"));
-            {
-                new CannotFindDataError($"Unable to find data for key: {key}")
-            });
         }
     }
 }

src/Ocelot/LoadBalancer/LoadBalancers/LeastConnection.cs

@@ -28,12 +28,12 @@ namespace Ocelot.LoadBalancer.LoadBalancers
 
             if (services == null)
             {
-                return new ErrorResponse<ServiceHostAndPort>(new List<Error>() { new ServicesAreNullError($"services were null for {_serviceName}") });
+                return new ErrorResponse<ServiceHostAndPort>(new ServicesAreNullError($"services were null for {_serviceName}") );
             }
 
             if (!services.Any())
             {
-                return new ErrorResponse<ServiceHostAndPort>(new List<Error>() { new ServicesAreEmptyError($"services were empty for {_serviceName}") });
+                return new ErrorResponse<ServiceHostAndPort>(new ServicesAreEmptyError($"services were empty for {_serviceName}"));
             }
 
             lock(_syncLock)

src/Ocelot/LoadBalancer/Middleware/LoadBalancingMiddleware.cs

@@ -9,15 +9,14 @@ namespace Ocelot.LoadBalancer.Middleware
     public class LoadBalancingMiddleware : OcelotMiddleware
     {
         private readonly OcelotRequestDelegate _next;
-        private readonly IOcelotLogger _logger;
         private readonly ILoadBalancerHouse _loadBalancerHouse;
 
         public LoadBalancingMiddleware(OcelotRequestDelegate next,
             IOcelotLoggerFactory loggerFactory,
             ILoadBalancerHouse loadBalancerHouse) 
+                :base(loggerFactory.CreateLogger<LoadBalancingMiddleware>())
         {
             _next = next;
-            _logger = loggerFactory.CreateLogger<LoadBalancingMiddleware>();
             _loadBalancerHouse = loadBalancerHouse;
         }
 
@@ -26,7 +25,7 @@ namespace Ocelot.LoadBalancer.Middleware
             var loadBalancer = await _loadBalancerHouse.Get(context.DownstreamReRoute, context.ServiceProviderConfiguration);
             if(loadBalancer.IsError)
             {
-                _logger.LogDebug("there was an error retriving the loadbalancer, setting pipeline error");
+                Logger.LogDebug("there was an error retriving the loadbalancer, setting pipeline error");
                 SetPipelineError(context, loadBalancer.Errors);
                 return;
             }
@@ -34,7 +33,7 @@ namespace Ocelot.LoadBalancer.Middleware
             var hostAndPort = await loadBalancer.Data.Lease();
             if(hostAndPort.IsError)
             {
-                _logger.LogDebug("there was an error leasing the loadbalancer, setting pipeline error");
+                Logger.LogDebug("there was an error leasing the loadbalancer, setting pipeline error");
                 SetPipelineError(context, hostAndPort.Errors);
                 return;
             }
@@ -52,7 +51,7 @@ namespace Ocelot.LoadBalancer.Middleware
             }
             catch (Exception)
             {
-                _logger.LogDebug("Exception calling next middleware, exception will be thrown to global handler");
+                Logger.LogDebug("Exception calling next middleware, exception will be thrown to global handler");
                 throw;
             }
             finally

src/Ocelot/Logging/AspDotNetLogger.cs

@@ -1,6 +1,5 @@
 using System;
 using Microsoft.Extensions.Logging;
-using Microsoft.Extensions.Logging.Internal;
 using Ocelot.Infrastructure.RequestData;
 
 namespace Ocelot.Logging
@@ -10,34 +9,38 @@ namespace Ocelot.Logging
         private readonly ILogger _logger;
         private readonly IRequestScopedDataRepository _scopedDataRepository;
 
-        public string Name { get; }
+        public AspDotNetLogger(ILogger logger, IRequestScopedDataRepository scopedDataRepository)
-
-        public AspDotNetLogger(ILogger logger, IRequestScopedDataRepository scopedDataRepository, string typeName)
         {
-            Name = typeName;
             _logger = logger;
             _scopedDataRepository = scopedDataRepository;
         }
 
-        public void LogTrace(string message, params object[] args)
+        public void LogTrace(string message)
         {            
             var requestId = GetOcelotRequestId();
             var previousRequestId = GetOcelotPreviousRequestId();
-            _logger.LogTrace("requestId: {requestId}, previousRequestId: {previousRequestId}, message: {message},", requestId, previousRequestId, new FormattedLogValues(message, args).ToString());
+            _logger.LogTrace("requestId: {requestId}, previousRequestId: {previousRequestId}, message: {message}", requestId, previousRequestId, message);
         }
 
-        public void LogDebug(string message, params object[] args)
+        public void LogDebug(string message)
         {            
             var requestId = GetOcelotRequestId();
             var previousRequestId = GetOcelotPreviousRequestId();
-            _logger.LogDebug("requestId: {requestId}, previousRequestId: {previousRequestId}, message: {message},", requestId, previousRequestId, new FormattedLogValues(message, args).ToString());
+            _logger.LogDebug("requestId: {requestId}, previousRequestId: {previousRequestId}, message: {message}", requestId, previousRequestId, message);
         }
 
-        public void LogInformation(string message, params object[] args)
+        public void LogInformation(string message)
         {            
             var requestId = GetOcelotRequestId();
             var previousRequestId = GetOcelotPreviousRequestId();
-            _logger.LogInformation("requestId: {requestId}, previousRequestId: {previousRequestId}, message: {message},", requestId, previousRequestId, new FormattedLogValues(message, args).ToString());
+            _logger.LogInformation("requestId: {requestId}, previousRequestId: {previousRequestId}, message: {message}", requestId, previousRequestId, message);
+        }
+
+        public void LogWarning(string message)
+        {
+            var requestId = GetOcelotRequestId();
+            var previousRequestId = GetOcelotPreviousRequestId();
+            _logger.LogWarning("requestId: {requestId}, previousRequestId: {previousRequestId}, message: {message}", requestId, previousRequestId, message);
         }
 
         public void LogError(string message, Exception exception)
@@ -47,18 +50,11 @@ namespace Ocelot.Logging
             _logger.LogError("requestId: {requestId}, previousRequestId: {previousRequestId}, message: {message}, exception: {exception}", requestId, previousRequestId, message, exception);
         }
 
-        public void LogError(string message, params object[] args)
-        {
-            var requestId = GetOcelotRequestId();
-            var previousRequestId = GetOcelotPreviousRequestId();
-            _logger.LogError("requestId: {requestId}, previousRequestId: {previousRequestId}, message: {message}", requestId, previousRequestId, new FormattedLogValues(message, args).ToString());
-        }
-
         public void LogCritical(string message, Exception exception)
         {
             var requestId = GetOcelotRequestId();
             var previousRequestId = GetOcelotPreviousRequestId();
-            _logger.LogError("requestId: {requestId}, previousRequestId: {previousRequestId}, message: {message}", requestId, previousRequestId, message);
+            _logger.LogCritical("requestId: {requestId}, previousRequestId: {previousRequestId}, message: {message}, exception: {exception}", requestId, previousRequestId, message, exception);
         }
 
         private string GetOcelotRequestId()

src/Ocelot/Logging/AspDotNetLoggerFactory.cs

@@ -17,7 +17,7 @@ namespace Ocelot.Logging
         public IOcelotLogger CreateLogger<T>()
         {
             var logger = _loggerFactory.CreateLogger<T>();
-            return new AspDotNetLogger(logger, _scopedDataRepository, typeof(T).Name);
+            return new AspDotNetLogger(logger, _scopedDataRepository);
         }
     }
 }

src/Ocelot/Logging/IOcelotLogger.cs

@@ -7,16 +7,11 @@ namespace Ocelot.Logging
     /// </summary>
     public interface IOcelotLogger
     {
-        void LogTrace(string message, params object[] args);
+        void LogTrace(string message);
-        void LogDebug(string message, params object[] args);
+        void LogDebug(string message);
-        void LogInformation(string message, params object[] args);
+        void LogInformation(string message);
+        void LogWarning(string message);
         void LogError(string message, Exception exception);
-        void LogError(string message, params object[] args);
         void LogCritical(string message, Exception exception);
-
-        /// <summary>
-        /// The name of the type the logger has been built for.
-        /// </summary>
-        string Name { get; }
     }
 }

src/Ocelot/Logging/OcelotDiagnosticListener.cs

@@ -8,15 +8,14 @@ using Butterfly.Client.Tracing;
 using System.Linq;
 using System.Collections.Generic;
 using Ocelot.Infrastructure.Extensions;
-using Microsoft.Extensions.Logging;
 using Ocelot.Requester;
 
 namespace Ocelot.Logging
 {
     public class OcelotDiagnosticListener
     {
-        private IServiceTracer _tracer;
+        private readonly IServiceTracer _tracer;
-        private IOcelotLogger _logger;
+        private readonly IOcelotLogger _logger;
 
         public OcelotDiagnosticListener(IOcelotLoggerFactory factory, IServiceTracer tracer)
         {
@@ -27,7 +26,7 @@ namespace Ocelot.Logging
         [DiagnosticName("Ocelot.MiddlewareException")]
         public virtual void OcelotMiddlewareException(Exception exception, DownstreamContext context, string name)
         {
-            _logger.LogTrace($"Ocelot.MiddlewareException: {name}; {exception.Message}");
+            _logger.LogTrace($"Ocelot.MiddlewareException: {name}; {exception.Message};");
             Event(context.HttpContext, $"Ocelot.MiddlewareStarted: {name}; {context.HttpContext.Request.Path}");
         }
 
@@ -41,7 +40,7 @@ namespace Ocelot.Logging
         [DiagnosticName("Ocelot.MiddlewareFinished")]
         public virtual void OcelotMiddlewareFinished(DownstreamContext context, string name)
         {
-            _logger.LogTrace($"OcelotMiddlewareFinished: {name}; {context.HttpContext.Request.Path}");
+            _logger.LogTrace($"Ocelot.MiddlewareFinished: {name}; {context.HttpContext.Request.Path}");
             Event(context.HttpContext, $"OcelotMiddlewareFinished: {name}; {context.HttpContext.Request.Path}");
         }
 
@@ -55,7 +54,7 @@ namespace Ocelot.Logging
         [DiagnosticName("Microsoft.AspNetCore.MiddlewareAnalysis.MiddlewareException")]
         public virtual void OnMiddlewareException(Exception exception, string name)
         {
-            _logger.LogTrace($"MiddlewareException: {name}; {exception.Message}");
+            _logger.LogTrace($"MiddlewareException: {name}; {exception.Message};");
         }
 
         [DiagnosticName("Microsoft.AspNetCore.MiddlewareAnalysis.MiddlewareFinished")]
@@ -67,16 +66,17 @@ namespace Ocelot.Logging
 
         private void Event(HttpContext httpContext, string @event)
         {  
-            // Hack - if the user isnt using tracing the code gets here and will blow up on 
+            // todo - if the user isnt using tracing the code gets here and will blow up on 
             // _tracer.Tracer.TryExtract. We already use the fake tracer for another scenario
-            // so sticking it here as well..I guess we need a factory for this but no idea
+            // so sticking it here as well..I guess we need a factory for this but cba to do it at
-            // how to hook that into the diagnostic framework at the moment.
+            // the moment
             if(_tracer.GetType() == typeof(FakeServiceTracer))
             {
                 return;
             }
 
             var span = httpContext.GetSpan();
+
             if(span == null)
             {
                 var spanBuilder = new SpanBuilder($"server {httpContext.Request.Method} {httpContext.Request.Path}");
@@ -84,10 +84,12 @@ namespace Ocelot.Logging
                     c => c.Select(x => new KeyValuePair<string, string>(x.Key, x.Value.GetValue())).GetEnumerator()))
                 {
                     spanBuilder.AsChildOf(spanContext);
-                };
+                }
+
                 span = _tracer.Start(spanBuilder);        
                 httpContext.SetSpan(span);   
             }
+
             span?.Log(LogField.CreateNew().Event(@event));
         }
     }

src/Ocelot/Middleware/DownstreamContext.cs

@@ -13,17 +13,24 @@ namespace Ocelot.Middleware
     {
         public DownstreamContext(HttpContext httpContext)
         {
-            this.HttpContext = httpContext;
+            HttpContext = httpContext;
             Errors = new List<Error>();
         }
 
         public List<PlaceholderNameAndValue> TemplatePlaceholderNameAndValues { get; set; }
+
         public ServiceProviderConfiguration ServiceProviderConfiguration {get; set;}
-        public HttpContext HttpContext { get; private set; }
+
+        public HttpContext HttpContext { get; }
+
         public DownstreamReRoute DownstreamReRoute { get; set; }
+
         public DownstreamRequest DownstreamRequest { get; set; }
+
         public HttpResponseMessage DownstreamResponse { get; set; }
+
         public List<Error> Errors { get;set; }
+
         public bool IsError => Errors.Count > 0;
     }
 }

src/Ocelot/Middleware/OcelotMiddleware.cs

@@ -1,20 +1,33 @@
 using System.Collections.Generic;
 using Ocelot.Errors;
+using Ocelot.Logging;
 
 namespace Ocelot.Middleware
 {
     public abstract class OcelotMiddleware
     {        
-        protected OcelotMiddleware()
+        protected OcelotMiddleware(IOcelotLogger logger)
         {
+            Logger = logger;
             MiddlewareName = this.GetType().Name;
         }
 
+        public IOcelotLogger Logger { get; }
+
         public string MiddlewareName { get; }
 
         public void SetPipelineError(DownstreamContext context, List<Error> errors)
         {
-            context.Errors = errors;
+            foreach(var error in errors)
+            {
+                SetPipelineError(context, error);
+            }
+        }
+
+        public void SetPipelineError(DownstreamContext context, Error error)
+        {
+            Logger.LogWarning(error.Message);
+            context.Errors.Add(error);
         }
     }
 }

src/Ocelot/Middleware/Pipeline/OcelotPipelineBuilderExtensions.cs

@@ -88,7 +88,7 @@ namespace Ocelot.Middleware.Pipeline
                         }
                         catch(Exception ex)
                         {
-                            Write(diagnosticListener, "Ocelot.MiddlewareException", middlewareName, context);
+                            WriteException(diagnosticListener, ex, "Ocelot.MiddlewareException", middlewareName, context);
                             throw ex;
                         }
                         finally
@@ -123,6 +123,14 @@ namespace Ocelot.Middleware.Pipeline
             }
         }
 
+        private static void WriteException(DiagnosticListener diagnosticListener, Exception exception, string message, string middlewareName, DownstreamContext context)
+        {
+            if(diagnosticListener != null)
+            {
+                diagnosticListener.Write(message, new { name = middlewareName, context = context, exception = exception });
+            }
+        }
+
         public static IOcelotPipelineBuilder MapWhen(this IOcelotPipelineBuilder app, Predicate predicate, Action<IOcelotPipelineBuilder> configuration)
         {
             if (app == null)

src/Ocelot/QueryStrings/Middleware/QueryStringBuilderMiddleware.cs

@@ -12,28 +12,27 @@ namespace Ocelot.QueryStrings.Middleware
     {
         private readonly OcelotRequestDelegate _next;
         private readonly IAddQueriesToRequest _addQueriesToRequest;
-        private readonly IOcelotLogger _logger;
 
         public QueryStringBuilderMiddleware(OcelotRequestDelegate next,
             IOcelotLoggerFactory loggerFactory,
             IAddQueriesToRequest addQueriesToRequest) 
+                : base(loggerFactory.CreateLogger<QueryStringBuilderMiddleware>())
         {
             _next = next;
             _addQueriesToRequest = addQueriesToRequest;
-            _logger = loggerFactory.CreateLogger<QueryStringBuilderMiddleware>();
         }
 
         public async Task Invoke(DownstreamContext context)
         {
             if (context.DownstreamReRoute.ClaimsToQueries.Any())
             {
-                _logger.LogDebug($"{context.DownstreamReRoute.DownstreamPathTemplate.Value} has instructions to convert claims to queries");
+                Logger.LogInformation($"{context.DownstreamReRoute.DownstreamPathTemplate.Value} has instructions to convert claims to queries");
 
                 var response = _addQueriesToRequest.SetQueriesOnDownstreamRequest(context.DownstreamReRoute.ClaimsToQueries, context.HttpContext.User.Claims, context.DownstreamRequest);
 
                 if (response.IsError)
                 {
-                    _logger.LogDebug("there was an error setting queries on context, setting pipeline error");
+                    Logger.LogWarning("there was an error setting queries on context, setting pipeline error");
 
                     SetPipelineError(context, response.Errors);
                     return;

src/Ocelot/Raft/RaftController.cs

@@ -40,9 +40,13 @@ namespace Ocelot.Raft
             using(var reader = new StreamReader(HttpContext.Request.Body))
             {
                 var json = await reader.ReadToEndAsync();
+
                 var appendEntries = JsonConvert.DeserializeObject<AppendEntries>(json, _jsonSerialiserSettings);
+
                 _logger.LogDebug($"{_baseSchemeUrlAndPort}/appendentries called, my state is {_node.State.GetType().FullName}");
+
                 var appendEntriesResponse = _node.Handle(appendEntries);
+
                 return new OkObjectResult(appendEntriesResponse);
             }
         }
@@ -53,9 +57,13 @@ namespace Ocelot.Raft
             using(var reader = new StreamReader(HttpContext.Request.Body))
             {
                 var json = await reader.ReadToEndAsync();
+
                 var requestVote = JsonConvert.DeserializeObject<RequestVote>(json, _jsonSerialiserSettings);
+
                 _logger.LogDebug($"{_baseSchemeUrlAndPort}/requestvote called, my state is {_node.State.GetType().FullName}");
+
                 var requestVoteResponse = _node.Handle(requestVote);
+
                 return new OkObjectResult(requestVoteResponse);
             }
         }
@@ -68,10 +76,15 @@ namespace Ocelot.Raft
                 using(var reader = new StreamReader(HttpContext.Request.Body))
                 {
                     var json = await reader.ReadToEndAsync();
+
                     var command = JsonConvert.DeserializeObject<ICommand>(json, _jsonSerialiserSettings);
+
                     _logger.LogDebug($"{_baseSchemeUrlAndPort}/command called, my state is {_node.State.GetType().FullName}");
+
                     var commandResponse = _node.Accept(command);
+
                     json = JsonConvert.SerializeObject(commandResponse, _jsonSerialiserSettings);
+
                     return StatusCode(200, json);
                 }
             }

src/Ocelot/RateLimit/Middleware/ClientRateLimitMiddleware.cs

@@ -14,16 +14,15 @@ namespace Ocelot.RateLimit.Middleware
     public class ClientRateLimitMiddleware : OcelotMiddleware
     {
         private readonly OcelotRequestDelegate _next;
-        private readonly IOcelotLogger _logger;
         private readonly IRateLimitCounterHandler _counterHandler;
         private readonly ClientRateLimitProcessor _processor;
 
         public ClientRateLimitMiddleware(OcelotRequestDelegate next,
             IOcelotLoggerFactory loggerFactory,
             IRateLimitCounterHandler counterHandler)
+                :base(loggerFactory.CreateLogger<ClientRateLimitMiddleware>())
         {
             _next = next;
-            _logger = loggerFactory.CreateLogger<ClientRateLimitMiddleware>();
             _counterHandler = counterHandler;
             _processor = new ClientRateLimitProcessor(counterHandler);
         }
@@ -35,7 +34,7 @@ namespace Ocelot.RateLimit.Middleware
             // check if rate limiting is enabled
             if (!context.DownstreamReRoute.EnableEndpointEndpointRateLimiting)
             {
-                _logger.LogDebug($"EndpointRateLimiting is not enabled for {context.DownstreamReRoute.DownstreamPathTemplate}");
+                Logger.LogInformation($"EndpointRateLimiting is not enabled for {context.DownstreamReRoute.DownstreamPathTemplate.Value}");
                 await _next.Invoke(context);
                 return;
             }
@@ -46,7 +45,7 @@ namespace Ocelot.RateLimit.Middleware
             // check white list
             if (IsWhitelisted(identity, options))
             {
-                _logger.LogDebug($"{context.DownstreamReRoute.DownstreamPathTemplate} is white listed from rate limiting");
+                Logger.LogInformation($"{context.DownstreamReRoute.DownstreamPathTemplate.Value} is white listed from rate limiting");
                 await _next.Invoke(context);
                 return;
             }
@@ -112,7 +111,8 @@ namespace Ocelot.RateLimit.Middleware
 
         public virtual void LogBlockedRequest(HttpContext httpContext, ClientRequestIdentity identity, RateLimitCounter counter, RateLimitRule rule, DownstreamReRoute downstreamReRoute)
         {
-            _logger.LogDebug($"Request {identity.HttpVerb}:{identity.Path} from ClientId {identity.ClientId} has been blocked, quota {rule.Limit}/{rule.Period} exceeded by {counter.TotalRequests}. Blocked by rule { downstreamReRoute.UpstreamPathTemplate }, TraceIdentifier {httpContext.TraceIdentifier}.");
+            Logger.LogInformation(
+                $"Request {identity.HttpVerb}:{identity.Path} from ClientId {identity.ClientId} has been blocked, quota {rule.Limit}/{rule.Period} exceeded by {counter.TotalRequests}. Blocked by rule { downstreamReRoute.UpstreamPathTemplate.Value }, TraceIdentifier {httpContext.TraceIdentifier}.");
         }
         
         public virtual Task ReturnQuotaExceededResponse(HttpContext httpContext, RateLimitOptions option, string retryAfter)

src/Ocelot/Request/Middleware/DownstreamRequest.cs

@@ -65,5 +65,10 @@ namespace Ocelot.Request.Middleware
 
             return uriBuilder.Uri.AbsoluteUri;
         }
+
+        public override string ToString() 
+        {
+            return ToUri();
+        }
     }
 }

src/Ocelot/Request/Middleware/DownstreamRequestInitialiserMiddleware.cs

@@ -11,15 +11,14 @@ namespace Ocelot.Request.Middleware
     public class DownstreamRequestInitialiserMiddleware : OcelotMiddleware
     {
         private readonly OcelotRequestDelegate _next;
-        private readonly IOcelotLogger _logger;
         private readonly Mapper.IRequestMapper _requestMapper;
 
         public DownstreamRequestInitialiserMiddleware(OcelotRequestDelegate next,
             IOcelotLoggerFactory loggerFactory,
             Mapper.IRequestMapper requestMapper)
+                :base(loggerFactory.CreateLogger<DownstreamRequestInitialiserMiddleware>())
         {
             _next = next;
-            _logger = loggerFactory.CreateLogger<DownstreamRequestInitialiserMiddleware>();
             _requestMapper = requestMapper;
         }
 

src/Ocelot/RequestId/Middleware/ReRouteRequestIdMiddleware.cs

@@ -1,14 +1,11 @@
+using System;
 using System.Linq;
 using System.Threading.Tasks;
-using Microsoft.AspNetCore.Http;
-using Microsoft.Extensions.Primitives;
 using Ocelot.Infrastructure.RequestData;
 using Ocelot.Logging;
 using Ocelot.Middleware;
-using System.Net.Http;
 using System.Net.Http.Headers;
 using System.Collections.Generic;
-using Ocelot.DownstreamRouteFinder.Middleware;
 using Ocelot.Request.Middleware;
 
 namespace Ocelot.RequestId.Middleware
@@ -16,16 +13,15 @@ namespace Ocelot.RequestId.Middleware
     public class ReRouteRequestIdMiddleware : OcelotMiddleware
     {
         private readonly OcelotRequestDelegate _next;
-        private readonly IOcelotLogger _logger;
         private readonly IRequestScopedDataRepository _requestScopedDataRepository;
 
         public ReRouteRequestIdMiddleware(OcelotRequestDelegate next,
             IOcelotLoggerFactory loggerFactory, 
             IRequestScopedDataRepository requestScopedDataRepository)
+                : base(loggerFactory.CreateLogger<ReRouteRequestIdMiddleware>())
         {
             _next = next;
             _requestScopedDataRepository = requestScopedDataRepository;
-            _logger = loggerFactory.CreateLogger<ReRouteRequestIdMiddleware>();
         }
 
         public async Task Invoke(DownstreamContext context)
@@ -39,25 +35,22 @@ namespace Ocelot.RequestId.Middleware
             // if get request ID is set on upstream request then retrieve it
             var key = context.DownstreamReRoute.RequestIdKey ?? DefaultRequestIdKey.Value;
 
-            StringValues upstreamRequestIds;
+            if (context.HttpContext.Request.Headers.TryGetValue(key, out var upstreamRequestIds))
-            if (context.HttpContext.Request.Headers.TryGetValue(key, out upstreamRequestIds))
             {
-                //set the traceidentifier
                 context.HttpContext.TraceIdentifier = upstreamRequestIds.First();
 
-                //todo fix looking in both places
                 //check if we have previous id in scoped repo
                 var previousRequestId = _requestScopedDataRepository.Get<string>("RequestId");
-                if (!previousRequestId.IsError && !string.IsNullOrEmpty(previousRequestId.Data))
+                if (!previousRequestId.IsError && !string.IsNullOrEmpty(previousRequestId.Data) && previousRequestId.Data != context.HttpContext.TraceIdentifier)
                 {
                     //we have a previous request id lets store it and update request id
-                    _requestScopedDataRepository.Add<string>("PreviousRequestId", previousRequestId.Data);
+                    _requestScopedDataRepository.Add("PreviousRequestId", previousRequestId.Data);
-                    _requestScopedDataRepository.Update<string>("RequestId", context.HttpContext.TraceIdentifier);
+                    _requestScopedDataRepository.Update("RequestId", context.HttpContext.TraceIdentifier);
                 }
                 else
                 {
                     //else just add request id
-                    _requestScopedDataRepository.Add<string>("RequestId", context.HttpContext.TraceIdentifier);
+                    _requestScopedDataRepository.Add("RequestId", context.HttpContext.TraceIdentifier);
                 }
             }
 

src/Ocelot/Requester/Middleware/HttpRequesterMiddleware.cs

@@ -12,15 +12,14 @@ namespace Ocelot.Requester.Middleware
     {
         private readonly OcelotRequestDelegate _next;
         private readonly IHttpRequester _requester;
-        private readonly IOcelotLogger _logger;
 
         public HttpRequesterMiddleware(OcelotRequestDelegate next,
             IOcelotLoggerFactory loggerFactory,
             IHttpRequester requester)
+                : base(loggerFactory.CreateLogger<HttpRequesterMiddleware>())
         {
             _next = next;
             _requester = requester;
-            _logger = loggerFactory.CreateLogger<HttpRequesterMiddleware>();
         }
 
         public async Task Invoke(DownstreamContext context)
@@ -29,13 +28,13 @@ namespace Ocelot.Requester.Middleware
 
             if (response.IsError)
             {
-                _logger.LogDebug("IHttpRequester returned an error, setting pipeline error");
+                Logger.LogDebug("IHttpRequester returned an error, setting pipeline error");
 
                 SetPipelineError(context, response.Errors);
                 return;
             }
 
-            _logger.LogDebug("setting http response message");
+            Logger.LogDebug("setting http response message");
 
             context.DownstreamResponse = response.Data;
         }

src/Ocelot/Requester/OcelotHttpTracingHandler.cs

@@ -1,5 +1,4 @@
 using System;
-using System.Collections.Generic;
 using System.Net.Http;
 using System.Threading;
 using System.Threading.Tasks;
@@ -13,7 +12,7 @@ namespace Ocelot.Requester
     {
         private readonly IServiceTracer _tracer;
         private readonly IRequestScopedDataRepository _repo;
-        private const string prefix_spanId = "ot-spanId";
+        private const string PrefixSpanId = "ot-spanId";
 
         public OcelotHttpTracingHandler(
             IServiceTracer tracer, 
@@ -37,11 +36,10 @@ namespace Ocelot.Requester
             HttpRequestMessage request, 
             CancellationToken cancellationToken)
         {
-            IEnumerable<string> traceIdVals = null;
+            if (request.Headers.Contains(PrefixSpanId))
-            if (request.Headers.TryGetValues(prefix_spanId, out traceIdVals))
             {
-                request.Headers.Remove(prefix_spanId);
+                request.Headers.Remove(PrefixSpanId);
-                request.Headers.TryAddWithoutValidation(prefix_spanId, span.SpanContext.SpanId);
+                request.Headers.TryAddWithoutValidation(PrefixSpanId, span.SpanContext.SpanId);
             }
 
             _repo.Add("TraceId", span.SpanContext.TraceId);

src/Ocelot/Responder/Middleware/ResponderMiddleware.cs

@@ -6,6 +6,7 @@ using Ocelot.Middleware;
 using System.Collections.Generic;
 using System.Threading.Tasks;
 using Ocelot.DownstreamRouteFinder.Middleware;
+using Ocelot.Infrastructure.Extensions;
 
 namespace Ocelot.Responder.Middleware
 {
@@ -17,18 +18,17 @@ namespace Ocelot.Responder.Middleware
         private readonly OcelotRequestDelegate _next;
         private readonly IHttpResponder _responder;
         private readonly IErrorsToHttpStatusCodeMapper _codeMapper;
-        private readonly IOcelotLogger _logger;
 
         public ResponderMiddleware(OcelotRequestDelegate next, 
             IHttpResponder responder,
             IOcelotLoggerFactory loggerFactory,
             IErrorsToHttpStatusCodeMapper codeMapper
            )
+            :base(loggerFactory.CreateLogger<ResponderMiddleware>())
         {
             _next = next;
             _responder = responder;
             _codeMapper = codeMapper;
-            _logger = loggerFactory.CreateLogger<ResponderMiddleware>();
         }
 
         public async Task Invoke(DownstreamContext context)
@@ -37,19 +37,13 @@ namespace Ocelot.Responder.Middleware
 
             if (context.IsError)
             {
-                var errors = context.Errors;
+                Logger.LogWarning($"{context.Errors.ToErrorString()} errors found in {MiddlewareName}. Setting error response for request path:{context.HttpContext.Request.Path}, request method: {context.HttpContext.Request.Method}");
-                _logger.LogError($"{errors.Count} pipeline errors found in {MiddlewareName}. Setting error response status code");
                 
-                foreach(var error in errors)
+                SetErrorResponse(context.HttpContext, context.Errors);
-                {
-                    _logger.LogError(error.Message);
-                }
-                
-                SetErrorResponse(context.HttpContext, errors);
             }
             else
             {
-                _logger.LogDebug("no pipeline errors, setting and returning completed response");
+                Logger.LogDebug("no pipeline errors, setting and returning completed response");
                 await _responder.SetResponseOnHttpContext(context.HttpContext, context.DownstreamResponse);
             }
         }

src/Ocelot/Responses/ErrorResponse.cs

@@ -5,11 +5,13 @@ namespace Ocelot.Responses
 {
     public class ErrorResponse : Response
     {
-        public ErrorResponse(Error error) : base(new List<Error>{error})
+        public ErrorResponse(Error error) 
+            : base(new List<Error>{error})
         {
         }
 
-        public ErrorResponse(List<Error> errors) : base(errors)
+        public ErrorResponse(List<Error> errors) 
+            : base(errors)
         {
         }
     }

src/Ocelot/Responses/Response.cs

@@ -15,14 +15,8 @@ namespace Ocelot.Responses
             Errors = errors ?? new List<Error>();
         } 
 
-        public List<Error> Errors { get; private set; }
+        public List<Error> Errors { get; }
 
-        public bool IsError
+        public bool IsError => Errors.Count > 0;
-        {
-            get
-            {
-                return Errors.Count > 0;
-            }
-        }
     }
 }

src/Ocelot/ServiceDiscovery/Providers/ConsulServiceDiscoveryProvider.cs

@@ -47,7 +47,7 @@ namespace Ocelot.ServiceDiscovery.Providers
                 }
                 else
                 {
-                    _logger.LogError($"Unable to use service Address: {serviceEntry.Service.Address} and Port: {serviceEntry.Service.Port} as it is invalid. Address must contain host only e.g. localhost and port must be greater than 0");
+                    _logger.LogWarning($"Unable to use service Address: {serviceEntry.Service.Address} and Port: {serviceEntry.Service.Port} as it is invalid. Address must contain host only e.g. localhost and port must be greater than 0");
                 }
             }
 

src/Ocelot/WebSockets/Middleware/WebSocketsProxyMiddleware.cs

@@ -11,13 +11,12 @@ namespace Ocelot.WebSockets.Middleware
     public class WebSocketsProxyMiddleware : OcelotMiddleware
     {
         private OcelotRequestDelegate _next;
-        private IOcelotLogger _logger;
 
         public WebSocketsProxyMiddleware(OcelotRequestDelegate next,
             IOcelotLoggerFactory loggerFactory)
+                :base(loggerFactory.CreateLogger<WebSocketsProxyMiddleware>())
         {
             _next = next;
-            _logger = loggerFactory.CreateLogger<WebSocketsProxyMiddleware>();
         }
 
         public async Task Invoke(DownstreamContext context)

test/Ocelot.ManualTest/Program.cs

@@ -37,11 +37,11 @@ namespace Ocelot.ManualTest
                          {
                              x.WithDictionaryHandle();
                          })
-                         .AddOpenTracing(option =>
+                       /*  .AddOpenTracing(option =>
                          {
                              option.CollectorUrl = "http://localhost:9618";
                              option.Service = "Ocelot.ManualTest";
-                         })
+                         })*/
                          .AddAdministration("/administration", "secret");
                 })
                 .ConfigureLogging((hostingContext, logging) =>

test/Ocelot.ManualTest/appsettings.json

@@ -2,7 +2,7 @@
   "Logging": {
     "IncludeScopes": false,
     "LogLevel": {
-      "Default": "Error",
+      "Default": "Trace",
       "System": "Error",
       "Microsoft": "Error"
     }

test/Ocelot.UnitTests/Configuration/ClaimsToThingCreatorTests.cs

@@ -72,7 +72,7 @@ namespace Ocelot.UnitTests.Configuration
         private void ThenTheLoggerIsCalledCorrectly()
         {
             _logger
-                .Verify(x => x.LogDebug(It.IsAny<string>(), It.IsAny<string>()), Times.Once);
+                .Verify(x => x.LogDebug(It.IsAny<string>()), Times.Once);
         }
 
         private void ThenClaimsToThingsAreReturned()

test/Ocelot.UnitTests/Configuration/HeaderFindAndReplaceCreatorTests.cs

@@ -124,7 +124,7 @@ namespace Ocelot.UnitTests.Configuration
 
         private void ThenTheLoggerIsCalledCorrectly(string message)
         {
-            _logger.Verify(x => x.LogError(message), Times.Once);
+            _logger.Verify(x => x.LogWarning(message), Times.Once);
         }
 
         [Fact]

test/Ocelot.UnitTests/Errors/ExceptionHandlerMiddlewareTests.cs

@@ -1,5 +1,3 @@
-using Ocelot.Middleware;
-
 namespace Ocelot.UnitTests.Errors
 {
     using System;
@@ -15,18 +13,18 @@ namespace Ocelot.UnitTests.Errors
     using Moq;
     using Ocelot.Configuration;
     using Ocelot.Errors;
-    using Ocelot.DownstreamRouteFinder.Middleware;
     using Ocelot.Infrastructure.RequestData;
+    using Ocelot.Middleware;
 
     public class ExceptionHandlerMiddlewareTests
     {
-        bool _shouldThrowAnException = false;
+        bool _shouldThrowAnException;
-        private Mock<IOcelotConfigurationProvider> _provider;
+        private readonly Mock<IOcelotConfigurationProvider> _provider;
-        private Mock<IRequestScopedDataRepository> _repo;
+        private readonly Mock<IRequestScopedDataRepository> _repo;
         private Mock<IOcelotLoggerFactory> _loggerFactory;
         private Mock<IOcelotLogger> _logger;
-        private ExceptionHandlerMiddleware _middleware;
+        private readonly ExceptionHandlerMiddleware _middleware;
-        private DownstreamContext _downstreamContext;
+        private readonly DownstreamContext _downstreamContext;
         private OcelotRequestDelegate _next;
 
         public ExceptionHandlerMiddlewareTests()
@@ -59,7 +57,7 @@ namespace Ocelot.UnitTests.Errors
                 .And(_ => GivenTheConfigurationIs(config))
                 .When(_ => WhenICallTheMiddleware())
                 .Then(_ => ThenTheResponseIsOk())
-                .And(_ => TheRequestIdIsNotSet())
+                .And(_ => TheAspDotnetRequestIdIsSet())
                 .BDDfy();
         }
 
@@ -89,7 +87,7 @@ namespace Ocelot.UnitTests.Errors
         }
 
         [Fact]
-        public void ShouldNotSetRequestId()
+        public void ShouldSetAspDotNetRequestId()
         {
             var config = new OcelotConfiguration(null, null, null, null);
 
@@ -97,7 +95,7 @@ namespace Ocelot.UnitTests.Errors
                 .And(_ => GivenTheConfigurationIs(config))
                 .When(_ => WhenICallTheMiddlewareWithTheRequestIdKey("requestidkey", "1234"))
                 .Then(_ => ThenTheResponseIsOk())
-                .And(_ => TheRequestIdIsNotSet())
+                .And(_ => TheAspDotnetRequestIdIsSet())
                 .BDDfy();
         }
 
@@ -146,29 +144,19 @@ namespace Ocelot.UnitTests.Errors
 
         private void GivenTheConfigReturnsError()
         {
-            var config = new OcelotConfiguration(null, null, null, null);
+            var response = new Responses.ErrorResponse<IOcelotConfiguration>(new FakeError());
-
-            var response = new Ocelot.Responses.ErrorResponse<IOcelotConfiguration>(new FakeError());
             _provider
                 .Setup(x => x.Get()).ReturnsAsync(response);
         }
 
-        public class FakeError : Error
-        {
-            public FakeError() 
-                : base("meh", OcelotErrorCode.CannotAddDataError)
-            {
-            }
-        }
-
         private void TheRequestIdIsSet(string key, string value)
         {
-            _repo.Verify(x => x.Add<string>(key, value), Times.Once);
+            _repo.Verify(x => x.Add(key, value), Times.Once);
         }
 
         private void GivenTheConfigurationIs(IOcelotConfiguration config)
         {
-            var response = new Ocelot.Responses.OkResponse<IOcelotConfiguration>(config);
+            var response = new Responses.OkResponse<IOcelotConfiguration>(config);
             _provider
                 .Setup(x => x.Get()).ReturnsAsync(response);
         }
@@ -193,9 +181,17 @@ namespace Ocelot.UnitTests.Errors
             _downstreamContext.HttpContext.Response.StatusCode.ShouldBe(500);
         }
 
-        private void TheRequestIdIsNotSet()
+        private void TheAspDotnetRequestIdIsSet()
         {
-            _repo.Verify(x => x.Add<string>(It.IsAny<string>(), It.IsAny<string>()), Times.Never);
+            _repo.Verify(x => x.Add(It.IsAny<string>(), It.IsAny<string>()), Times.Once);
+        }
+
+        class FakeError : Error
+        {
+            internal FakeError()
+                : base("meh", OcelotErrorCode.CannotAddDataError)
+            {
+            }
         }
     }
 }

test/Ocelot.UnitTests/Headers/AddHeadersToResponseTests.cs

@@ -106,7 +106,7 @@ namespace Ocelot.UnitTests.Headers
 
         private void ThenTheErrorIsLogged()
         {
-            _logger.Verify(x => x.LogError("Unable to add header to response Trace-Id: {TraceId}"), Times.Once);
+            _logger.Verify(x => x.LogWarning("Unable to add header to response Trace-Id: {TraceId}"), Times.Once);
         }
 
         private void ThenTheHeaderIsNotAdded(string key)

test/Ocelot.UnitTests/Logging/AspDotNetLoggerTests.cs

@@ -0,0 +1,81 @@
+namespace Ocelot.UnitTests.Logging
+{
+    using Moq;
+    using Xunit;
+    using Ocelot.Logging;
+    using Microsoft.Extensions.Logging;
+    using Ocelot.Infrastructure.RequestData;
+    using System;
+
+    public class AspDotNetLoggerTests
+    {
+        private readonly Mock<ILogger<object>> _coreLogger;
+        private readonly AspDotNetLogger _logger; 
+        private Mock<IRequestScopedDataRepository> _repo;
+        private readonly string _b;
+        private readonly string _a;
+        private readonly Exception _ex;
+
+        public AspDotNetLoggerTests()
+        {
+            _a = "tom";
+            _b = "laura";
+            _ex = new Exception("oh no");
+            _coreLogger = new Mock<ILogger<object>>();
+            _repo = new Mock<IRequestScopedDataRepository>();
+            _logger = new AspDotNetLogger(_coreLogger.Object, _repo.Object);
+        }
+
+        [Fact]
+        public void should_log_trace()
+        {
+            _logger.LogTrace($"a message from {_a} to {_b}");
+
+            ThenLevelIsLogged("requestId: no request id, previousRequestId: no previous request id, message: a message from tom to laura", LogLevel.Trace);
+        }
+
+        [Fact]
+        public void should_log_info()
+        {
+            _logger.LogInformation($"a message from {_a} to {_b}");
+
+            ThenLevelIsLogged("requestId: no request id, previousRequestId: no previous request id, message: a message from tom to laura", LogLevel.Information);
+        }
+
+        [Fact]
+        public void should_log_warning()
+        {
+            _logger.LogWarning($"a message from {_a} to {_b}");
+
+            ThenLevelIsLogged("requestId: no request id, previousRequestId: no previous request id, message: a message from tom to laura", LogLevel.Warning);
+        }
+
+        [Fact]
+        public void should_log_error()
+        {
+            
+            _logger.LogError($"a message from {_a} to {_b}", _ex);
+
+            ThenLevelIsLogged("requestId: no request id, previousRequestId: no previous request id, message: a message from tom to laura, exception: System.Exception: oh no", LogLevel.Error);
+        }
+
+        [Fact]
+        public void should_log_critical()
+        {
+            _logger.LogCritical($"a message from {_a} to {_b}", _ex);
+
+            ThenLevelIsLogged("requestId: no request id, previousRequestId: no previous request id, message: a message from tom to laura, exception: System.Exception: oh no", LogLevel.Critical);
+        }
+
+        private void ThenLevelIsLogged(string expected, LogLevel expectedLogLevel)
+        {
+            _coreLogger.Verify(
+                x => x.Log(
+                    expectedLogLevel,
+                    It.IsAny<EventId>(),
+                    It.Is<object>(o => o.ToString() == expected), 
+                    It.IsAny<Exception>(),
+                    It.IsAny<Func<object, Exception, string>>()), Times.Once);
+        }
+    }
+}

test/Ocelot.UnitTests/Logging/OcelotDiagnosticListenerTests.cs

@@ -0,0 +1,145 @@
+using Ocelot.Logging;
+using Moq;
+using TestStack.BDDfy;
+using Butterfly.Client.Tracing;
+using Ocelot.Requester;
+using Xunit;
+using Ocelot.Middleware;
+using Microsoft.AspNetCore.Http;
+using System;
+
+namespace Ocelot.UnitTests.Logging
+{
+    public class OcelotDiagnosticListenerTests
+    {
+        private readonly OcelotDiagnosticListener _listener;
+        private Mock<IOcelotLoggerFactory> _factory;
+        private readonly Mock<IOcelotLogger> _logger;
+        private IServiceTracer _tracer;
+        private DownstreamContext _downstreamContext;
+        private string _name;
+        private Exception _exception;
+
+        public OcelotDiagnosticListenerTests()
+        {
+            _factory = new Mock<IOcelotLoggerFactory>();
+            _logger = new Mock<IOcelotLogger>();
+            _tracer = new FakeServiceTracer();
+            _factory.Setup(x => x.CreateLogger<OcelotDiagnosticListener>()).Returns(_logger.Object);
+            _listener = new OcelotDiagnosticListener(_factory.Object, _tracer);
+        }
+
+        [Fact]
+        public void should_trace_ocelot_middleware_started()
+        {
+            this.Given(_ => GivenAMiddlewareName())
+                .And(_ => GivenAContext())
+                .When(_ => WhenOcelotMiddlewareStartedCalled())
+                .Then(_ => ThenTheLogIs($"Ocelot.MiddlewareStarted: {_name}; {_downstreamContext.HttpContext.Request.Path}"))
+                .BDDfy();
+        }
+
+        [Fact]
+        public void should_trace_ocelot_middleware_finished()
+        {
+            this.Given(_ => GivenAMiddlewareName())
+                .And(_ => GivenAContext())
+                .When(_ => WhenOcelotMiddlewareFinishedCalled())
+                .Then(_ => ThenTheLogIs($"Ocelot.MiddlewareFinished: {_name}; {_downstreamContext.HttpContext.Request.Path}"))
+                .BDDfy();
+        }
+
+        [Fact]
+        public void should_trace_ocelot_middleware_exception()
+        {
+            this.Given(_ => GivenAMiddlewareName())
+                .And(_ => GivenAContext())
+                .And(_ => GivenAException(new Exception("oh no")))
+                .When(_ => WhenOcelotMiddlewareExceptionCalled())
+                .Then(_ => ThenTheLogIs($"Ocelot.MiddlewareException: {_name}; {_exception.Message};"))
+                .BDDfy();
+        }
+
+       [Fact]
+        public void should_trace_middleware_started()
+        {
+            this.Given(_ => GivenAMiddlewareName())
+                .And(_ => GivenAContext())
+                .When(_ => WhenMiddlewareStartedCalled())
+                .Then(_ => ThenTheLogIs($"MiddlewareStarting: {_name}; {_downstreamContext.HttpContext.Request.Path}"))
+                .BDDfy();
+        }
+
+        [Fact]
+        public void should_trace_middleware_finished()
+        {
+            this.Given(_ => GivenAMiddlewareName())
+                .And(_ => GivenAContext())
+                .When(_ => WhenMiddlewareFinishedCalled())
+                .Then(_ => ThenTheLogIs($"MiddlewareFinished: {_name}; {_downstreamContext.HttpContext.Response.StatusCode}"))
+                .BDDfy();
+        }
+
+        [Fact]
+        public void should_trace_middleware_exception()
+        {
+            this.Given(_ => GivenAMiddlewareName())
+                .And(_ => GivenAContext())
+                .And(_ => GivenAException(new Exception("oh no")))
+                .When(_ => WhenMiddlewareExceptionCalled())
+                .Then(_ => ThenTheLogIs($"MiddlewareException: {_name}; {_exception.Message};"))
+                .BDDfy();
+        }
+
+        private void GivenAException(Exception exception)
+        {
+            _exception = exception;
+        }
+
+        private void WhenOcelotMiddlewareStartedCalled()
+        {
+            _listener.OcelotMiddlewareStarted(_downstreamContext, _name);
+        }
+
+        private void WhenOcelotMiddlewareFinishedCalled()
+        {
+            _listener.OcelotMiddlewareFinished(_downstreamContext, _name);
+        }
+
+        private void WhenOcelotMiddlewareExceptionCalled()
+        {
+            _listener.OcelotMiddlewareException(_exception, _downstreamContext, _name);
+        }
+
+        private void WhenMiddlewareStartedCalled()
+        {
+            _listener.OnMiddlewareStarting(_downstreamContext.HttpContext, _name);
+        }
+
+        private void WhenMiddlewareFinishedCalled()
+        {
+            _listener.OnMiddlewareFinished(_downstreamContext.HttpContext, _name);
+        }
+
+        private void WhenMiddlewareExceptionCalled()
+        {
+            _listener.OnMiddlewareException(_exception, _name);
+        }
+
+        private void GivenAContext()
+        {
+            _downstreamContext = new DownstreamContext(new DefaultHttpContext());
+        }
+
+        private void GivenAMiddlewareName()
+        {
+            _name = "name";
+        }
+
+        private void ThenTheLogIs(string expected)
+        {
+            _logger.Verify(
+                x => x.LogTrace(expected));
+        }
+    }
+}

test/Ocelot.UnitTests/Middleware/OcelotMiddlewareTests.cs

@@ -0,0 +1,75 @@
+using System;
+using System.Collections.Generic;
+using Microsoft.AspNetCore.Http;
+using Moq;
+using Ocelot.Errors;
+using Ocelot.Logging;
+using Ocelot.Middleware;
+using Ocelot.UnitTests.Responder;
+using TestStack.BDDfy;
+using Xunit;
+
+namespace Ocelot.UnitTests.Middleware
+{
+    public class OcelotMiddlewareTests
+    {
+        private Mock<IOcelotLogger> _logger;
+        private FakeMiddleware _middleware;
+        private List<Error> _errors;
+
+        public OcelotMiddlewareTests()
+        {
+            _errors = new List<Error>();
+            _logger = new Mock<IOcelotLogger>();
+            _middleware = new FakeMiddleware(_logger.Object);
+        }
+
+        [Fact]
+        public void should_log_error()
+        {
+            this.Given(x => GivenAnError(new AnyError()))
+                .When(x => WhenISetTheError())
+                .Then(x => ThenTheErrorIsLogged(1))
+                .BDDfy();
+        }
+
+        [Fact]
+        public void should_log_errors()
+        {
+            this.Given(x => GivenAnError(new AnyError()))
+                .And(x => GivenAnError(new AnyError()))
+                .When(x => WhenISetTheErrors())
+                .Then(x => ThenTheErrorIsLogged(2))
+                .BDDfy();
+        }
+
+        private void WhenISetTheErrors()
+        {
+            _middleware.SetPipelineError(new DownstreamContext(new DefaultHttpContext()), _errors);
+        }
+
+        private void ThenTheErrorIsLogged(int times)
+        {
+            _logger.Verify(x => x.LogWarning("blahh"), Times.Exactly(times));
+        }
+
+        private void WhenISetTheError()
+        {
+            _middleware.SetPipelineError(new DownstreamContext(new DefaultHttpContext()), _errors[0]);
+        }
+
+        private void GivenAnError(Error error)
+        {
+            _errors.Add(error);
+        }
+
+    }
+
+    public class FakeMiddleware : OcelotMiddleware
+    {
+        public FakeMiddleware(IOcelotLogger logger) 
+            : base(logger)
+        {
+        }
+    }
+}

test/Ocelot.UnitTests/Ocelot.UnitTests.csproj

@@ -57,4 +57,8 @@
     <PackageReference Include="Butterfly.Client.AspNetCore" Version="0.0.8" />
   </ItemGroup>
 
+  <ItemGroup>
+    <Folder Include="WebSockets\" />
+  </ItemGroup>
+
 </Project>

test/Ocelot.UnitTests/RequestId/ReRouteRequestIdMiddlewareTests.cs

@@ -1,9 +1,6 @@
-using Ocelot.Middleware;
+namespace Ocelot.UnitTests.RequestId
-
-namespace Ocelot.UnitTests.RequestId
 {
     using Microsoft.AspNetCore.Http;
-    using Microsoft.Extensions.Primitives;
     using Ocelot.Infrastructure.RequestData;
     using System;
     using System.Collections.Generic;
@@ -21,6 +18,7 @@ namespace Ocelot.UnitTests.RequestId
     using TestStack.BDDfy;
     using Xunit;
     using Ocelot.Request.Middleware;
+    using Ocelot.Middleware;
 
     public class ReRouteRequestIdMiddlewareTests
     {
@@ -142,6 +140,30 @@ namespace Ocelot.UnitTests.RequestId
                 .BDDfy();
         }
 
+        [Fact]
+        public void should_not_update_if_global_request_id_is_same_as_re_route_request_id()
+        {
+            var downstreamRoute = new DownstreamRoute(new List<PlaceholderNameAndValue>(),
+                new ReRouteBuilder()
+                    .WithDownstreamReRoute(new DownstreamReRouteBuilder()
+                        .WithDownstreamPathTemplate("any old string")
+                        .WithRequestIdKey("LSRequestId")
+                        .WithUpstreamHttpMethod(new List<string> { "Get" })
+                        .Build())
+                    .WithUpstreamHttpMethod(new List<string> { "Get" })
+                    .Build());
+
+            var requestId = "alreadyset";
+
+            this.Given(x => x.GivenTheDownStreamRouteIs(downstreamRoute))
+                .And(x => GivenTheRequestIdWasSetGlobally())
+                .And(x => x.GivenTheRequestIdIsAddedToTheRequest("LSRequestId", requestId))
+                .When(x => x.WhenICallTheMiddleware())
+                .Then(x => x.ThenTheTraceIdIs(requestId))
+                .And(x => ThenTheRequestIdIsNotUpdated())
+                .BDDfy();
+        }
+
         private void WhenICallTheMiddleware()
         {
             _middleware.Invoke(_downstreamContext).GetAwaiter().GetResult();
@@ -159,12 +181,17 @@ namespace Ocelot.UnitTests.RequestId
 
         private void ThenTheRequestIdIsSaved()
         {
-            _repo.Verify(x => x.Add<string>("RequestId", _value), Times.Once);
+            _repo.Verify(x => x.Add("RequestId", _value), Times.Once);
         }
 
         private void ThenTheRequestIdIsUpdated()
         {
-            _repo.Verify(x => x.Update<string>("RequestId", _value), Times.Once);
+            _repo.Verify(x => x.Update("RequestId", _value), Times.Once);
+        }
+
+        private void ThenTheRequestIdIsNotUpdated()
+        {
+            _repo.Verify(x => x.Update("RequestId", _value), Times.Never);
         }
 
         private void GivenTheDownStreamRouteIs(DownstreamRoute downstreamRoute)
@@ -182,15 +209,13 @@ namespace Ocelot.UnitTests.RequestId
 
         private void ThenTheTraceIdIsAnything()
         {
-            StringValues value;
+            _downstreamContext.HttpContext.Response.Headers.TryGetValue("LSRequestId", out var value);
-            _downstreamContext.HttpContext.Response.Headers.TryGetValue("LSRequestId", out value);
             value.First().ShouldNotBeNullOrEmpty();
         }
 
         private void ThenTheTraceIdIs(string expected)
         {
-            StringValues value;
+            _downstreamContext.HttpContext.Response.Headers.TryGetValue("LSRequestId", out var value);
-            _downstreamContext.HttpContext.Response.Headers.TryGetValue("LSRequestId", out value);
             value.First().ShouldBe(expected);
         }
     }

test/Ocelot.UnitTests/Responder/ResponderMiddlewareTests.cs

@@ -51,7 +51,7 @@ namespace Ocelot.UnitTests.Responder
         public void should_return_any_errors()
         {
             this.Given(x => x.GivenTheHttpResponseMessageIs(new HttpResponseMessage()))
-                .And(x => x.GivenThereArePipelineErrors(new UnableToFindDownstreamRouteError()))
+                .And(x => x.GivenThereArePipelineErrors(new UnableToFindDownstreamRouteError("/path", "GET")))
                 .When(x => x.WhenICallTheMiddleware())
                 .Then(x => x.ThenThereAreNoErrors())
                 .BDDfy();

test/Ocelot.UnitTests/ServiceDiscovery/ConsulServiceDiscoveryProviderTests.cs

@@ -142,12 +142,12 @@ namespace Ocelot.UnitTests.ServiceDiscovery
         private void ThenTheLoggerHasBeenCalledCorrectlyForInvalidAddress()
         {
             _logger.Verify(
-                x => x.LogError(
+                x => x.LogWarning(
                     "Unable to use service Address: http://localhost and Port: 50881 as it is invalid. Address must contain host only e.g. localhost and port must be greater than 0"),
                 Times.Once);
 
             _logger.Verify(
-                x => x.LogError(
+                x => x.LogWarning(
                     "Unable to use service Address: http://localhost and Port: 50888 as it is invalid. Address must contain host only e.g. localhost and port must be greater than 0"),
                 Times.Once);
         }
@@ -155,12 +155,12 @@ namespace Ocelot.UnitTests.ServiceDiscovery
         private void ThenTheLoggerHasBeenCalledCorrectlyForInvalidPorts()
         {
             _logger.Verify(
-                x => x.LogError(
+                x => x.LogWarning(
                     "Unable to use service Address: localhost and Port: -1 as it is invalid. Address must contain host only e.g. localhost and port must be greater than 0"),
                 Times.Once);
 
             _logger.Verify(
-                x => x.LogError(
+                x => x.LogWarning(
                     "Unable to use service Address: localhost and Port: 0 as it is invalid. Address must contain host only e.g. localhost and port must be greater than 0"),
                 Times.Once);
         }