remove some examples learning content as they are exist on the wiki itself now

Former-commit-id: 8c69be5bf8ca21eb0e405ca5ad8431ceb1c2511e

sessions/config.go

@@ -3,7 +3,9 @@ package sessions
 import (
 	"time"
 
-	"github.com/iris-contrib/go.uuid"
+	"github.com/kataras/iris/context"
+
+	uuid "github.com/iris-contrib/go.uuid"
 )
 
 const (
@@ -103,10 +105,11 @@ type (
 		// Defaults to infinitive/unlimited life duration(0).
 		Expires time.Duration
 
-		// SessionIDGenerator should returns a random session id.
+		// SessionIDGenerator can be set to a function which
+		// return a unique session id.
 		// By default we will use a uuid impl package to generate
 		// that, but developers can change that with simple assignment.
-		SessionIDGenerator func() string
+		SessionIDGenerator func(ctx context.Context) string
 
 		// DisableSubdomainPersistence set it to true in order dissallow your subdomains to have access to the session cookie
 		//
@@ -123,7 +126,7 @@ func (c Config) Validate() Config {
 	}
 
 	if c.SessionIDGenerator == nil {
-		c.SessionIDGenerator = func() string {
+		c.SessionIDGenerator = func(context.Context) string {
 			id, _ := uuid.NewV4()
 			return id.String()
 		}

sessions/sessions.go

@@ -78,7 +78,7 @@ func (s *Sessions) Start(ctx context.Context, cookieOptions ...context.CookieOpt
 	cookieValue := s.decodeCookieValue(GetCookie(ctx, s.config.Cookie))
 
 	if cookieValue == "" { // cookie doesn't exists, let's generate a session and add set a cookie
-		sid := s.config.SessionIDGenerator()
+		sid := s.config.SessionIDGenerator(ctx)
 
 		sess := s.provider.Init(sid, s.config.Expires)
 		sess.isNew = s.provider.db.Len(sid) == 0