Sharing Session between .NET Framework application and .Net7 application is not working

[meghanavedpathak]

I am trying to Set Session variable in .NET framework application and access it in .NET 7 application using link https://learn.microsoft.com/en-us/aspnet/core/migration/inc/remote-session?view=aspnetcore-7.0 however I am unable to get value of session variable in .NET Core.

I did following changes

.NET Framework -
Added Nuget package Microsoft.AspNetCore.SystemWebAdapters.FrameworkServices

Added below code in global.asax.cs -Application_Start function

SystemWebAdapterConfiguration.AddSystemWebAdapters(this)
.AddJsonSessionSerializer(options =>
{
// Serialization/deserialization requires each session key to be registered to a type
options.RegisterKey("test");
})
// Provide a strong API key that will be used to authenticate the request on the remote app for querying the session
// ApiKey is a string representing a GUID
.AddRemoteAppServer(options => options.ApiKey = "03f74e3e-d690-4806-b0a7-e66f89215bb3")
.AddSessionServer();

.NET 7 Changes

builder.Services.AddSystemWebAdapters()
.AddJsonSessionSerializer(options =>
{
// Serialization/deserialization requires each session key to be registered to a type
options.RegisterKey("test");
}) .AddRemoteAppClient(options =>
{
// Provide the URL for the remote app that has enabled session querying
options.RemoteAppUrl = new(builder.Configuration["ReverseProxy:Clusters:fallbackCluster:Destinations:fallbackApp:Address"]);
// Provide a strong API key that will be used to authenticate the request on the remote app for querying the session
options.ApiKey = "03f74e3e-d690-4806-b0a7-e66f89215bb3";
})
.AddSessionClient();

Added app.MapDefaultControllerRoute().RequireSystemWebAdapterSession(); ;

[sgarnovsky]

I have got something the same but under .Net 8.
Originally I'd already created a project using .Net 6 and SystemWebAdapters using version 1.2.0 and it worked fine.
After migrating to the .Net 8 and SystemWebAdapters 1.3.0 (nuget package) Session from the System.Web.HttpContext is returned as a null reference.

One thing I see this github project refers 1.2.0 version. It is possible the 1.3.0 has changed initialization steps or just moved to other place.

So for now, I just downgraded the SystemWebAdapters packages back to 1.2.0 version. Confirmed the Session sharing works fine under .Net 8 in this case.

[lalitkhanna]

@sgarnovsky I've tried with all versions .Net6,7,8. Its not at all working, Can you pls share your code ?

[sgarnovsky]

My code is here. It's mostly the same as yours above. I only use a custom session serializer.
Followed instructions from this video to make it working.
https://www.youtube.com/watch?v=zXoGXbB3JDI

services.AddSystemWebAdapters()
.AddSessionSerializer()
.AddMssAdminSessionSerializer()
.AddRemoteAppClient(options =>
{
options.RemoteAppUrl = new(Configuration.GetMigrationLegacyAppAddress());
options.ApiKey = Configuration.GetMigrationRemoteAPIKey();
})
.AddSessionClient();

app.MapRazorPages()
.RequireSystemWebAdapterSession();

[lalitkhanna]

@sgarnovsky I did same but somehow still System.Web.HttpContext.Current.Session is null. Any Possibilities if you can share your code in Github?
I'm using .Net 8 & SystemWebAdapters ver is 1.3 & also tried 1.2 but nothing happened.

[sgarnovsky]

Unfortunately, I can't share my code (it is a big customer project).
I guess, as a session is null even for the 1.2 package version, you may miss to call the RequireSystemWebAdapterSession in a right way...
Please try a [Session] attribute too, as described here:
https://stackoverflow.com/questions/73638526/session-sharing-between-asp-net-webforms-and-asp-net-core

Also, do not forget to apply a middleware initialization call: app.UseSystemWebAdapters();

And of course, check the session instance from the "System.Web.HttpContext":
System.Web.HttpContext.Current?.Session

[lalitkhanna]

Dear @sgarnovsky

Able to Achieve , now its working. Thankyou so much for your help.

[sgarnovsky]

@lalitkhanna please post the details you found to fix on your side.
And, of course, let us know what a version of SystemWebAdapters you ended up to use as well as .Net version.

[lalitkhanna]

@sgarnovsky I found couple of points for my fix.

1. Add all four .Netget Packages for Microsoft.AspNetCore.SystemWebAdapters.FrameworkServices
2. Added [Session] attribute in Controller
3. Microsoft.AspNetCore.SystemWebAdapters.FrameworkServices 1.2 Ver
4. .Net 8

Rest all points are same which @meghanavedpathak added.

[sgarnovsky]

@lalitkhanna thank you for details.
Please let us know if you tried the 1.3 version.

[meghanavedpathak]

I tried by using .Net 6 and SystemWebAdapters using version 1.2.0 but its not working on my side. We do not want application to be on .NET 8 currently. I will check video you provided. Thank you for help.

[Jbarker1]

Same here, using .net 8 and going back to version 1.2.0 with the rest following the remoteauth identity sample works.

[lalitkhanna]

Another issue, while trying to access the Asp.net web form pages then getting ERR_HTTP2_PROTOCOL_ERROR .(in console)

Anybody face this issue ?