Computer scienceBackendKtorKtor PluginsAuthentication

Basic And Form Authentication

Double basic authentication

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The Ktor authentication plugin allows you to create multiple authorizations and give them different names. Let's create two basic authentications as follows:

install(Authentication) {
    basic("myAuth") {
        realm = "Access to the '/page' path"
        validate { credentials ->
            if (credentials.name == "Admin" && credentials.password == "2425") {
                UserIdPrincipal(credentials.name)
            } else {
                null
            }
        }
    }
    basic("myAuth2") {
        realm = "Access to the '/page' path"
        validate { credentials ->
            if (credentials.name == "Admin2" && credentials.password == "1213") {
                UserIdPrincipal(credentials.name)
            } else {
                null
            }
        }
    }
}

What happens if we apply these authorizations to one page?

authenticate("myAuth") {
    authenticate("myAuth2") {
        get("/page") {
            call.respondText("Name: ${call.principal<UserIdPrincipal>()?.name}")
        }
    }
}

Open the IDE and check the result yourself.

Select one or more options from the list

A runtime error will occur.

An assembly error will occur.

First you have to pass myAuth and then myAuth2. The page will show: "Name: Admin"

First you have to pass myAuth and then myAuth2. The page will show: "Name: Admin2"

If you enter the correct credentials for myAuth2 ("Admin2, 1213"), the first authorization does not appear. The page displays: "Name: Admin2"

A compilation error will occur.

If you enter the correct credentials for myAuth ("Admin, 2425"), the second authorization does not appear. The page displays: "Name: Admin"

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