IIS virtual directories

[Tratcher]

When we're spun up behind IIS / HttpPlatformHandler how do we know what the virtual directory is? We need this to correctly set PathBase in the app. Ideally we'd set PathBase as part of the initial server address configuration, but at that point we're only given the port via environment variable.
@davidfowl

[davidfowl]

Should handle that based on the path passed into server.urls

[Tratcher]

Yes, but how do you get that information from IIS to server.urls? Right now we only get the port.

[davidfowl]

We'd need to restructure a bit. It can be setup in the M.A.Hosting.json file.

[Tratcher]

Depends on aspnet/KestrelHttpServer#214

[Tratcher]

Workaround: put your app in a app.Map("/vdir" ...
aspnet/Hosting#416 (comment)

[rubenprins]

Please don't require us to hard code the IIS vdir in external config files, like M.A.Hosting.json, when IIS and HttpPlatformHandler already know this.

Just pass this information on for example in an environment variable, like %HTTP_PLATFORM_VDIR%, so you can say

    <httpPlatform stdoutLogEnabled="false" stdoutLogFile="log.log" startupTimeLimit="20" processPath="%HOME%\site\kestrel.cmd" arguments="http://localhost:%HTTP_PLATFORM_PORT%/%HTTP_PLATFORM_VDIR%">
      <environmentVariables></environmentVariables>
    </httpPlatform>

[davidfowl]

@rubenprins That fix is coming. This is a workaround until the fix is available. We're working with the httpPlatformHandler team to fix bugs found in beta8 and rc1.