minor version 11.2.2 - register sessions as middleware and Context.HTML/Text like Context.Writef

Former-commit-id: 6f5f1c502fb06d739c350c3ecc891f495dc03a6e

_examples/README.md

@@ -308,7 +308,7 @@ iris cache library lives on its own [package](https://github.com/kataras/iris/tr
 iris session manager lives on its own [package](https://github.com/kataras/iris/tree/master/sessions).
 
 - [Overview](sessions/overview/main.go)
-- [Standalone](sessions/standalone/main.go)
+- [Middleware](sessions/middleware/main.go)
 - [Secure Cookie](sessions/securecookie/main.go)
 - [Flash Messages](sessions/flash-messages/main.go)
 - [Databases](sessions/database)

_examples/README_ZH.md

@@ -416,7 +416,7 @@ Iris 独立缓存包 [package](https://github.com/kataras/iris/tree/master/cache
 Iris session 管理独立包 [package](https://github.com/kataras/iris/tree/master/sessions).
 
 - [概览](sessions/overview/main.go)
-- [独立使用](sessions/standalone/main.go)
+- [中间件](sessions/middleware/main.go)
 - [安全cookie](sessions/securecookie/main.go)
 - [临时消息](sessions/flash-messages/main.go)
 - [数据库](sessions/database)

_examples/routing/custom-context/method-overriding/main.go

@@ -37,11 +37,11 @@ func (ctx *MyContext) Next() {
 // Override any context's method you want...
 // [...]
 
-func (ctx *MyContext) HTML(htmlContents string) (int, error) {
+func (ctx *MyContext) HTML(format string, args ...interface{}) (int, error) {
 	ctx.Application().Logger().Infof("Executing .HTML function from MyContext")
 
 	ctx.ContentType("text/html")
-	return ctx.WriteString(htmlContents)
+	return ctx.Writef(format, args...)
 }
 
 func main() {

_examples/routing/route-state/main.go

@@ -28,6 +28,12 @@ func main() {
 	})
 
 	app.Get("/execute", func(ctx iris.Context) {
+		if !none.IsOnline() {
+			ctx.Values().Set("from", "/execute with offline access")
+			ctx.Exec("NONE", "/invisible/iris")
+			return
+		}
+
 		// same as navigating to "http://localhost:8080/invisible/iris" when /change has being invoked and route state changed
 		// from "offline" to "online"
 		ctx.Values().Set("from", "/execute") // values and session can be shared when calling Exec from a "foreign" context.

_examples/sessions/middleware/main.go

@@ -26,26 +26,33 @@ func main() {
 		// if you want to invalid cookies on different subdomains
 		// of the same host, then enable it.
 		// Defaults to false.
-		DisableSubdomainPersistence: true,
+		DisableSubdomainPersistence: false,
-		// AllowReclaim will allow to
-		// Destroy and Start a session in the same request handler.
-		// All it does is that it removes the cookie for both `Request` and `ResponseWriter` while `Destroy`
-		// or add a new cookie to `Request` while `Start`.
-		//
-		// Defaults to false.
-		AllowReclaim: true,
 	})
 
+	app.Use(sess.Handler()) // session is always non-nil inside handlers now.
+
 	app.Get("/", func(ctx iris.Context) {
-		ctx.Writef("You should navigate to the /set, /get, /delete, /clear,/destroy instead")
+		session := sessions.Get(ctx) // same as sess.Start(ctx, cookieOptions...)
+		if session.Len() == 0 {
+			ctx.HTML(`no session values stored yet. Navigate to: <a href="/set">set page</a>`)
+			return
+		}
+
+		ctx.HTML("<ul>")
+		session.Visit(func(key string, value interface{}) {
+			ctx.HTML("<li> %s = %v </li>", key, value)
+		})
+
+		ctx.HTML("</ul>")
 	})
+
+	//set session values.
 	app.Get("/set", func(ctx iris.Context) {
-		//set session values.
+		session := sessions.Get(ctx)
-		s := sess.Start(ctx)
+		session.Set("name", "iris")
-		s.Set("name", "iris")
 
 		//test if set here.
-		ctx.Writef("All ok session set to: %s", s.GetString("name"))
+		ctx.Writef("All ok session set to: %s", session.GetString("name"))
 
 		// Set will set the value as-it-is,
 		// if it's a slice or map
@@ -56,22 +63,32 @@ func main() {
 		// Read more about muttable and immutable go types: https://stackoverflow.com/a/8021081
 	})
 
+	app.Get("/set/{key}/{value}", func(ctx iris.Context) {
+		key, value := ctx.Params().Get("key"), ctx.Params().Get("value")
+
+		session := sessions.Get(ctx)
+		session.Set(key, value)
+
+		// test if set here
+		ctx.Writef("All ok session value of the '%s' is: %s", key, session.GetString(key))
+	})
+
 	app.Get("/get", func(ctx iris.Context) {
 		// get a specific value, as string,
 		// if not found then it returns just an empty string.
-		name := sess.Start(ctx).GetString("name")
+		name := sessions.Get(ctx).GetString("name")
 
 		ctx.Writef("The name on the /set was: %s", name)
 	})
 
 	app.Get("/delete", func(ctx iris.Context) {
 		// delete a specific key
-		sess.Start(ctx).Delete("name")
+		sessions.Get(ctx).Delete("name")
 	})
 
 	app.Get("/clear", func(ctx iris.Context) {
 		// removes all entries.
-		sess.Start(ctx).Clear()
+		sessions.Get(ctx).Clear()
 	})
 
 	app.Get("/update", func(ctx iris.Context) {
@@ -81,13 +98,15 @@ func main() {
 
 	app.Get("/destroy", func(ctx iris.Context) {
 		//destroy, removes the entire session data and cookie
-		sess.Destroy(ctx)
+		// sess.Destroy(ctx)
+		// or
+		sessions.Get(ctx).Destroy()
 	})
 	// Note about Destroy:
 	//
 	// You can destroy a session outside of a handler too, using the:
-	// mySessions.DestroyByID
+	// sess.DestroyByID
-	// mySessions.DestroyAll
+	// sess.DestroyAll
 
 	// remember: slices and maps are muttable by-design
 	// The `SetImmutable` makes sure that they will be stored and received
@@ -97,9 +116,9 @@ func main() {
 	// Read more about muttable and immutable go types: https://stackoverflow.com/a/8021081
 	app.Get("/set_immutable", func(ctx iris.Context) {
 		business := []businessModel{{Name: "Edward"}, {Name: "value 2"}}
-		s := sess.Start(ctx)
+		session := sessions.Get(ctx)
-		s.SetImmutable("businessEdit", business)
+		session.SetImmutable("businessEdit", business)
-		businessGet := s.Get("businessEdit").([]businessModel)
+		businessGet := session.Get("businessEdit").([]businessModel)
 
 		// try to change it, if we used `Set` instead of `SetImmutable` this
 		// change will affect the underline array of the session's value "businessEdit", but now it will not.
@@ -108,7 +127,7 @@ func main() {
 	})
 
 	app.Get("/get_immutable", func(ctx iris.Context) {
-		valSlice := sess.Start(ctx).Get("businessEdit")
+		valSlice := sessions.Get(ctx).Get("businessEdit")
 		if valSlice == nil {
 			ctx.HTML("please navigate to the <a href='/set_immutable'>/set_immutable</a> first")
 			return

context/context.go

@@ -768,9 +768,9 @@ type Context interface {
 	// Binary writes out the raw bytes as binary data.
 	Binary(data []byte) (int, error)
 	// Text writes out a string as plain text.
-	Text(text string) (int, error)
+	Text(format string, args ...interface{}) (int, error)
 	// HTML writes out a string as text/html.
-	HTML(htmlContents string) (int, error)
+	HTML(format string, args ...interface{}) (int, error)
 	// JSON marshals the given interface object and writes the JSON response.
 	JSON(v interface{}, options ...JSON) (int, error)
 	// JSONP marshals the given interface object and writes the JSON response.
@@ -2876,15 +2876,15 @@ func (ctx *context) Binary(data []byte) (int, error) {
 }
 
 // Text writes out a string as plain text.
-func (ctx *context) Text(text string) (int, error) {
+func (ctx *context) Text(format string, args ...interface{}) (int, error) {
 	ctx.ContentType(ContentTextHeaderValue)
-	return ctx.writer.WriteString(text)
+	return ctx.Writef(format, args...)
 }
 
 // HTML writes out a string as text/html.
-func (ctx *context) HTML(htmlContents string) (int, error) {
+func (ctx *context) HTML(format string, args ...interface{}) (int, error) {
 	ctx.ContentType(ContentHTMLHeaderValue)
-	return ctx.writer.WriteString(htmlContents)
+	return ctx.Writef(format, args...)
 }
 
 // JSON contains the options for the JSON (Context's) Renderer.

doc.go

@@ -38,13 +38,13 @@ Source code and other details for the project are available at GitHub:
 
 Current Version
 
-11.2.1
+11.2.2
 
 Installation
 
 The only requirement is the Go Programming Language, at least version 1.12.
 
-    $ go get github.com/kataras/iris@v11.2.1
+    $ go get github.com/kataras/iris@v11.2.2
 
 Wiki:
 

iris.go

@@ -37,7 +37,7 @@ import (
 
 var (
 	// Version is the current version number of the Iris Web Framework.
-	Version = "11.2.1"
+	Version = "11.2.2"
 )
 
 // HTTP status codes as registered with IANA.

sessions/session.go

@@ -411,6 +411,11 @@ func (s *Session) Visit(cb func(k string, v interface{})) {
 	s.provider.db.Visit(s.sid, cb)
 }
 
+// Len returns the total number of stored values in this session.
+func (s *Session) Len() int {
+	return s.provider.db.Len(s.sid)
+}
+
 func (s *Session) set(key string, value interface{}, immutable bool) {
 	s.provider.db.Set(s.sid, s.Lifetime, key, value, immutable)
 

sessions/sessions.go

@@ -77,7 +77,7 @@ func (s *Sessions) updateCookie(ctx context.Context, sid string, expires time.Du
 func (s *Sessions) Start(ctx context.Context, cookieOptions ...context.CookieOption) *Session {
 	cookieValue := s.decodeCookieValue(GetCookie(ctx, s.config.Cookie))
 
-	if cookieValue == "" { // cookie doesn't exists, let's generate a session and add set a cookie
+	if cookieValue == "" { // cookie doesn't exist, let's generate a session and set a cookie.
 		sid := s.config.SessionIDGenerator(ctx)
 
 		sess := s.provider.Init(sid, s.config.Expires)
@@ -88,9 +88,35 @@ func (s *Sessions) Start(ctx context.Context, cookieOptions ...context.CookieOpt
 		return sess
 	}
 
-	sess := s.provider.Read(cookieValue, s.config.Expires)
+	return s.provider.Read(cookieValue, s.config.Expires)
+}
 
-	return sess
+const contextSessionKey = "_iris_session"
+
+// Handler returns a sessions middleware to register on application routes.
+func (s *Sessions) Handler(cookieOptions ...context.CookieOption) context.Handler {
+	return func(ctx context.Context) {
+		session := s.Start(ctx, cookieOptions...)
+		ctx.Values().Set(contextSessionKey, session)
+		ctx.Next()
+	}
+}
+
+// Get returns a *Session from the same request life cycle,
+// can be used inside a chain of handlers of a route.
+//
+// The `Sessions.Start` should be called previously,
+// e.g. register the `Sessions.Handler` as middleware.
+// Then call `Get` package-level function as many times as you want.
+// The `Sessions.Start` can be called more than one time in the same request life cycle as well.
+func Get(ctx context.Context) *Session {
+	if v := ctx.Values().Get(contextSessionKey); v != nil {
+		if sess, ok := v.(*Session); ok {
+			return sess
+		}
+	}
+
+	return nil
 }
 
 // StartWithPath same as `Start` but it explicitly accepts the cookie path option.