ootb System.MissingMethodException: Method not found

[Wallace Turner]

I'm getting this error from a File -> New Project -> Console App (.NET Framework)

The exact same code works on a Console App (.NET Core) Project.

To get to this point (in both) I had to apply [this fix] [1] with the point being am falling over very early in the tryout process

I understand this may not be a ravendb bug per se but it is still an impediment to 'getting going quickly'

using (var session = store.OpenSession())

System.MissingMethodException: Method not found: 'System.Func`5<System.Net.Http.HttpRequestMessage,System.Security.Cryptography.X509Certificates.X509Certificate2,System.Security.Cryptography.X509Certificates.X509Chain,System.Net.Security.SslPolicyErrors,Boolean> System.Net.Http.HttpClientHandler.get_ServerCertificateCustomValidationCallback()'.

   at Raven.Client.Http.RequestExecutor.CreateClient()

   at System.Lazy`1.CreateValue()

   at System.Lazy`1.LazyInitValue()

   at System.Lazy`1.get_Value()

   at Raven.Client.Http.RequestExecutor..ctor(String databaseName, X509Certificate2 certificate, DocumentConventions conventions)

   at Raven.Client.Http.RequestExecutor.Create(String[] urls, String databaseName, X509Certificate2 certificate, DocumentConventions conventions)

   at Raven.Client.Documents.DocumentStore.<>c__DisplayClass20_0.<GetRequestExecutor>b__0()

   at System.Lazy`1.CreateValue()

   at System.Lazy`1.LazyInitValue()

   at System.Lazy`1.get_Value()

   at Raven.Client.Documents.DocumentStore.GetRequestExecutor(String database)

   at Raven.Client.Documents.DocumentStore.OpenSession(SessionOptions options)

   at Raven.Client.Documents.DocumentStore.OpenSession()

   at ConsoleApp2.Program.Main(String[] args) in c:\Users\wal\source\repos\ConsoleApp2\ConsoleApp2\Program.cs:line 23

[1]: https://groups.google.com/forum/#!searchin/ravendb/installing$20index$20with$20certificate%7Csort:date/ravendb/LgKIOyhkIQs/DXPx_vROBgAJ

[Oren Eini (Ayende Rahien)]

Please make sure that you are using the right version of the framework there. It looks like you are building against .NET Core 1.1 and not 2.0

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[Wallace Turner]

Oren, what version(s) of the .net framework have you been testing your raven4 client library on ?

After investigating this further it appears there are  200 missing APIs that were part of .NET Standard 2.0 but not actually implemented by .NET Framework 4.6.1, 4.6.2 or 4.7 [1]: 

Those missing are detailed here [2] which includes `ServerCertificateCustomValidationCallback`  

[1]: https://blogs.msdn.microsoft.com/dotnet/2017/10/17/announcing-the-net-framework-4-7-1/

[2]: https://github.com/dotnet/standard/blob/master/netstandard/src/ApiCompatBaseline.net461.txt

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[Oren Eini (Ayende Rahien)]

We are testing mostly on the CoreCLR. We have also tested somewhat on the full framework, but apparently not enough.

Tracking this here: http://issues.hibernatingrhinos.com/issue/RavenDB-9533

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[Fitzchak Yitzchaki]

Hello,

This was fixed, please try with the next nightly build.

Note, that you might need to add the following in your code:

ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;
ServicePointManager.ServerCertificateValidationCallback += OnServerCertificateCustomValidationCallback;

[Wallace Turner]

what is the body of `OnServerCertificateCustomValidationCallback`

[Oren Eini (Ayende Rahien)]

Whatever you want it to be is you need to actually do certificate validation

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[Wallace Turner]

sure but why 'might' we need to provide it ? the default-shipped code will check the certs properly vs bypassing/implementing it yourself

[Oren Eini (Ayende Rahien)]

For example, if you are using self signed certs, or require the certs to be from a particular issuer.

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[Wallace Turner]

yes i know but Fitzchak implying you might need to implement it as part of the fix; its confusing

if you're using raven.client and lets encrypt you shouldnt need it. (unless you say otherwise for some reason)

[Wallace Turner]

yes i know but Fitzchak implying you might need to implement it as part of the fix; its confusing

if you're using raven.client and lets encrypt you shouldnt need it. (unless you say otherwise for some reason)

On Monday, 4 December 2017 20:58:02 UTC+8, Oren Eini wrote:

[Oren Eini (Ayende Rahien)]

Correct.

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