Proxy/Intercept pattern is throwing a keep alive header error with net461

[Curtis004]

Hello!

Trying to get proxying working with the following example:

FluentMockServer server = FluentMockServer.StartWithAdminInterface(port: 8088); server.Given(Request.Create().WithPath("*")).AtPriority(10).RespondWith(Response.Create().WithProxy("http://restcountries.eu/"));

But its throwing me this:
{ "ClassName": "System.ArgumentException", "Message": "The 'Keep-Alive' header must be modified using the appropriate property or method.", "Data": null, "InnerException": null, "HelpURL": null, "StackTraceString": " at System.Net.WebHeaderCollection.ThrowOnRestrictedHeader(String headerName)\r\n at System.Net.WebHeaderCollection.Set(String name, String value)\r\n at Microsoft.Owin.Host.HttpListener.RequestProcessing.ResponseHeadersDictionary.Set(String header, String value)\r\n at Microsoft.Owin.Host.HttpListener.RequestProcessing.HeadersDictionaryBase.Set(String key, String[] value)\r\n at WireMock.Owin.OwinResponseMapper.<>c__DisplayClass1_0.<MapAsync>b__1(KeyValuePair'2 pair)\r\n at System.Collections.Generic.List'1.ForEach(Action'1 action)\r\n at WireMock.Owin.OwinResponseMapper.<MapAsync>d__1.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at WireMock.Owin.WireMockMiddleware.<Invoke>d__5.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at WireMock.Owin.GlobalExceptionMiddleware.<Invoke>d__2.MoveNext()", "RemoteStackTraceString": null, "RemoteStackIndex": 0, "ExceptionMethod": "8\nThrowOnRestrictedHeader\nSystem, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089\nSystem.Net.WebHeaderCollection\nVoid ThrowOnRestrictedHeader(System.String)", "HResult": -2147024809, "Source": "System", "WatsonBuckets": null, "ParamName": "name" }

I can see in the request log however that the request is proxied properly:

[ { "Guid": "8c509c3a-db4e-407f-baf1-7e8eecb5e408", "Request": { "ClientIP": "::1", "DateTime": "2017-12-07T19:30:36.7224812+00:00", "Path": "/rest/v2/all", "AbsoluteUrl": "http://localhost:8088/rest/v2/all", "Method": "get", "Headers": { "Postman-Token": [ "a936e818-4c09-49f5-a3b1-efebdd6bedcc" ], "Cache-Control": [ "no-cache" ], "Connection": [ "keep-alive" ], "Accept": [ "*/*" ], "Accept-Encoding": [ "gzip, deflate" ], "Host": [ "localhost:8088" ], "User-Agent": [ "PostmanRuntime/7.1.1" ] } }, "Response": { "StatusCode": 200, "Headers": { "Keep-Alive": [ "timeout=5, max=100" ], "Access-Control-Allow-Methods": [ "GET" ], "Access-Control-Allow-Headers": [ "Accept, X-Requested-With" ], "Content-Type": [ "application/json; charset=utf-8" ], "Access-Control-Allow-Origin": [ "*" ], "Date": [ "Thu, 07 Dec 2017 19:30:37 GMT" ], "Connection": [ "Keep-Alive" ], "Transfer-Encoding": [ "chunked" ], "Server": [ "Apache/2.4.25", "(Debian)" ], "Cache-Control": [ "public, max-age=86400" ] }, "Body": "[{\"name\":\"Afghanistan\",\"topLevelDomain\":[\".af\"],\"alpha2Code\":\"AF\",\"alpha3Code\":\"AFG\",\"callingCodes\":[\"93\"],\"capital\":\"Kabul\",\"altSpellings\":[\"AF\",\"Afġānistān\"],\"region\":\"Asia\",\"subregion\":\"Southern Asia\",\"population\":27657145,\"latlng\":[33.0,65.0],\"demonym\":\"Afghan\",\"area\":652230.0,\"gini\":27.8,\"timezones\":[\"UTC+04:30\"],\"borders\":[\"IRN\",\"PAK\",\"TKM\",\"UZB\",\"TJK\",\"CHN\"],\"nativeName\":\"افغانستان\",\"numericCode\":\"004\",\"currencies\":[{\"code\":\"AFN\",\"name\":\"Afghan afghani\",\"symbol\":\"؋\"}],\"languages\":[{\"iso639_1\":\"ps\",\"iso639_2\":\"pus\",\"name\":\"Pashto\",\"nativeName\":\"پښتو\"},{\"iso639_1\":\"uz\",\"iso639_2\":\"uzb\",\"name\":\"Uzbek\",\"nativeName\":\"Oʻzbek\"},{\"iso639_1\":\"tk\",\"iso639_2\":\"tuk\",\"name\":\"Turkmen\",\"nativeName\":\"Türkmen\"}],\"translations\":{\"de\":\"Afghanistan\",\"es\":\"Afganistán\",\"fr\":\"Afghanistan\",\"ja\":\"アフガニスタン\",\"it\":\"Afghanistan\",\"br\":\"Afeganistão\",\"pt\":\"Afeganistão\",\"nl\":\"Afghanistan\",\"hr\":\"Afganistan\",\"fa\":\"افغانستان\"},\"flag\":\"https://restcountries.eu/data/afg.svg\",\"regionalBlocs\":[{\"acronym\":\"SAARC\",\"name\":\"South Asian Association for Regional Cooperation\",\"otherAcronyms\":[],\"otherNames\":[]}],\"cioc\":\"AFG\"},{\"name\":\"Åland Islands\",\"topLevelDomain\":[\".ax\"],\"alpha2Code\":\"AX\",\"alpha3Code\":\"ALA\",\"callingCodes\":[\"358\"],\"capital\":\"Mariehamn\",\"altSpellings\":[\"AX\",\"Aaland\",\"Aland\",\"Ahvenanmaa\"],\"region\":\"Europe\",\"subregion\":\"Northern Europe\",\"population\":28875,\"latlng\":[60.116667,19.9],\"demonym\":\"Ålandish\",\"area\":1580.0,\"gini\":null,\"timezones\":[\"UTC+02:00\"],\"borders\":[],\"nativeName\":\"Åland\",\"numericCode\":\"248\",\"currencies\":[{\"code\":\"EUR\",\"name\":\"Euro\",\"symbol\":\"€\"}],\"languages\":[{\"iso639_1\":\"sv\",\"iso639_2\":\"swe\",\"name\":\"Swedish\",\"nativeName\":\"svenska\"}],\"translations\":{\"de\":\"Åland\",\"es\":\"Alandia\",\"fr\":\"Åland\",\"ja\":\"オーランド諸島\",\"it\":\"Isole Aland\",\"br\":\"Ilhas de Aland\",\"pt\":\"Ilhas de Aland\",\"nl\":\"Ålandeilanden\",\"hr\":\"Ålandski otoci\",\"fa\":\"جزایر الند\"},\"flag\":\"https://restcountries.eu/data/ala.svg\",\"regionalBlocs\":[{\"acronym\":\"EU\",\"name\":\"European Union\",\"otherAcronyms\":[],\"otherNames\":[]}],\"cioc\":\"\"},{\"name\":\"Albania\",\"topLevelDomain\": ... etc.

Any ideas what I'm doing wrong?

[StefH]

I can imagine that Keep-Alive is a reserved header.

Are you using netcore or .net 4.x ?

[Curtis004]

net4.6.1, I'm not explicitly setting any headers.

[StefH]

New NuGet is uploaded, please retest.

[Curtis004]

Great! Amazing turn around time. Will re-test once back in office and let you know. Thanks.

[Curtis004]

This is working now, thanks for the quick assist!