Some minor but helpful additions, like CookieOption. Relative: https://github.com/kataras/iris/issues/1018. Simple cookies example added too. Cookie encoding (side by side with the already session's cookie id encoding) and version upgrade will come tomorrow with a new HISTORY.md entry as well, stay tuned!

Former-commit-id: d14181fac998d32d77690b1b3e42b6c7c72f1ace

_examples/README.md

@@ -395,6 +395,10 @@ iris cache library lives on its own [package](https://github.com/kataras/iris/tr
 
 > You're free to use your own favourite caching package if you'd like so.
 
+### Cookies
+
+- [Basic](cookies/basic/main.go)
+
 ### Sessions
 
 iris session manager lives on its own [package](https://github.com/kataras/iris/tree/master/sessions).

_examples/README_ZH.md

@@ -394,6 +394,10 @@ Iris 独立缓存包 [package](https://github.com/kataras/iris/tree/master/cache
 
 > 可以随意使用自定义的缓存包。
 
+### Cookies
+
+- [Basic](cookies/basic/main.go)
+
 ### Sessions
 
 Iris session 管理独立包 [package](https://github.com/kataras/iris/tree/master/sessions).

_examples/cookies/basic/main.go

@@ -0,0 +1,64 @@
+package main
+
+import "github.com/kataras/iris"
+
+func newApp() *iris.Application {
+	app := iris.New()
+
+	// Set A Cookie.
+	app.Get("/cookies/{name}/{value}", func(ctx iris.Context) {
+		name := ctx.Params().Get("name")
+		value := ctx.Params().Get("value")
+
+		ctx.SetCookieKV(name, value) // <--
+		// Alternatively: ctx.SetCookie(&http.Cookie{...})
+		//
+		// If you want to set custom the path:
+		// ctx.SetCookieKV(name, value, iris.CookiePath("/custom/path/cookie/will/be/stored"))
+		//
+		// If you want to be visible only to current request path:
+		// (note that client should be responsible for that if server sent an empty cookie's path, all browsers are compatible)
+		// ctx.SetCookieKV(name, value, iris.CookieCleanPath /* or iris.CookiePath("") */)
+		// More:
+		//                              iris.CookieExpires(time.Duration)
+		//                              iris.CookieHTTPOnly(false)
+
+		ctx.Writef("cookie added: %s = %s", name, value)
+	})
+
+	// Retrieve A Cookie.
+	app.Get("/cookies/{name}", func(ctx iris.Context) {
+		name := ctx.Params().Get("name")
+
+		value := ctx.GetCookie(name) // <--
+		// If you want more than the value then:
+		// cookie, err := ctx.Request().Cookie(name)
+		// if err != nil {
+		//  handle error.
+		// }
+
+		ctx.WriteString(value)
+	})
+
+	// Delete A Cookie.
+	app.Delete("/cookies/{name}", func(ctx iris.Context) {
+		name := ctx.Params().Get("name")
+
+		ctx.RemoveCookie(name) // <--
+		// If you want to set custom the path:
+		// ctx.SetCookieKV(name, value, iris.CookiePath("/custom/path/cookie/will/be/stored"))
+
+		ctx.Writef("cookie %s removed", name)
+	})
+
+	return app
+}
+
+func main() {
+	app := newApp()
+
+	// GET:    http://localhost:8080/cookies/my_name/my_value
+	// GET:    http://localhost:8080/cookies/my_name
+	// DELETE: http://localhost:8080/cookies/my_name
+	app.Run(iris.Addr(":8080"))
+}

_examples/cookies/basic/main_test.go

@@ -0,0 +1,32 @@
+package main
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/kataras/iris/httptest"
+)
+
+func TestCookiesBasic(t *testing.T) {
+	app := newApp()
+	e := httptest.New(t, app, httptest.URL("http://example.com"))
+
+	cookieName, cookieValue := "my_cookie_name", "my_cookie_value"
+
+	// Test Set A Cookie.
+	t1 := e.GET(fmt.Sprintf("/cookies/%s/%s", cookieName, cookieValue)).Expect().Status(httptest.StatusOK)
+	t1.Cookie(cookieName).Value().Equal(cookieValue) // validate cookie's existence, it should be there now.
+	t1.Body().Contains(cookieValue)
+
+	// Test Retrieve A Cookie.
+	t2 := e.GET(fmt.Sprintf("/cookies/%s", cookieName)).Expect().Status(httptest.StatusOK)
+	t2.Body().Equal(cookieValue)
+
+	// Test Remove A Cookie.
+	t3 := e.DELETE(fmt.Sprintf("/cookies/%s", cookieName)).Expect().Status(httptest.StatusOK)
+	t3.Body().Contains(cookieName)
+
+	t4 := e.GET(fmt.Sprintf("/cookies/%s", cookieName)).Expect().Status(httptest.StatusOK)
+	t4.Cookies().Empty()
+	t4.Body().Empty()
+}

context/context.go

@@ -854,18 +854,41 @@ type Context interface {
 	//  | Cookies                                                    |
 	//  +------------------------------------------------------------+
 
-	// SetCookie adds a cookie
+	// SetCookie adds a cookie.
-	SetCookie(cookie *http.Cookie)
+	// Use of the "options" is not required, they can be used to amend the "cookie".
-	// SetCookieKV adds a cookie, receives just a name(string) and a value(string)
 	//
-	// If you use this method, it expires at 2 hours
+	// Example: https://github.com/kataras/iris/tree/master/_examples/cookies/basic
-	// use ctx.SetCookie or http.SetCookie if you want to change more fields.
+	SetCookie(cookie *http.Cookie, options ...CookieOption)
-	SetCookieKV(name, value string)
+	// SetCookieKV adds a cookie, requires the name(string) and the value(string).
+	//
+	// By default it expires at 2 hours and it's added to the root path,
+	// use the `CookieExpires` and `CookiePath` to modify them.
+	// Alternatively: ctx.SetCookie(&http.Cookie{...})
+	//
+	// If you want to set custom the path:
+	// ctx.SetCookieKV(name, value, iris.CookiePath("/custom/path/cookie/will/be/stored"))
+	//
+	// If you want to be visible only to current request path:
+	// ctx.SetCookieKV(name, value, iris.CookieCleanPath/iris.CookiePath(""))
+	// More:
+	//                              iris.CookieExpires(time.Duration)
+	//                              iris.CookieHTTPOnly(false)
+	//
+	// Example: https://github.com/kataras/iris/tree/master/_examples/cookies/basic
+	SetCookieKV(name, value string, options ...CookieOption)
 	// GetCookie returns cookie's value by it's name
 	// returns empty string if nothing was found.
-	GetCookie(name string) string
+	//
-	// RemoveCookie deletes a cookie by it's name.
+	// If you want more than the value then:
-	RemoveCookie(name string)
+	// cookie, err := ctx.Request().Cookie("name")
+	//
+	// Example: https://github.com/kataras/iris/tree/master/_examples/cookies/basic
+	GetCookie(name string, options ...CookieOption) string
+	// RemoveCookie deletes a cookie by it's name and path = "/".
+	// Tip: change the cookie's path to the current one by: RemoveCookie("name", iris.CookieCleanPath)
+	//
+	// Example: https://github.com/kataras/iris/tree/master/_examples/cookies/basic
+	RemoveCookie(name string, options ...CookieOption)
 	// VisitAllCookies takes a visitor which loops
 	// on each (request's) cookies' name and value.
 	VisitAllCookies(visitor func(name string, value string))
@@ -1233,7 +1256,7 @@ func (ctx *context) HandlerName() string {
 // It can be changed to a customized one if needed (very advanced usage).
 //
 // See `DefaultNext` for more information about this and why it's exported like this.
-var Next = DefaultNext ///TODO: add an example for this usecase, i.e describe handlers and skip only file handlers.
+var Next = DefaultNext
 
 // DefaultNext is the default function that executed on each middleware if `ctx.Next()`
 // is called.
@@ -2992,57 +3015,144 @@ func (ctx *context) SendFile(filename string, destinationName string) error {
 }
 
 //  +------------------------------------------------------------+
-//  | Cookies, Session and Flashes                               |
+//  | Cookies                                                    |
 //  +------------------------------------------------------------+
 
-// SetCookie adds a cookie
+// CookieOption is the type of function that is accepted on
-func (ctx *context) SetCookie(cookie *http.Cookie) {
+// context's methods like `SetCookieKV`, `RemoveCookie` and `SetCookie`
+// as their (last) variadic input argument to amend the end cookie's form.
+//
+// Any custom or built'n `CookieOption` is valid,
+// see `CookiePath`, `CookieCleanPath`, `CookieExpires` and `CookieHTTPOnly` for more.
+type CookieOption func(*http.Cookie)
+
+// CookiePath is a `CookieOption`.
+// Use it to change the cookie's Path field.
+func CookiePath(path string) CookieOption {
+	return func(c *http.Cookie) {
+		c.Path = path
+	}
+}
+
+// CookieCleanPath is a `CookieOption`.
+// Use it to clear the cookie's Path field, exactly the same as `CookiePath("")`.
+func CookieCleanPath(c *http.Cookie) {
+	c.Path = ""
+}
+
+// CookieExpires is a `CookieOption`.
+// Use it to change the cookie's Expires and MaxAge fields by passing the lifetime of the cookie.
+func CookieExpires(durFromNow time.Duration) CookieOption {
+	return func(c *http.Cookie) {
+		c.Expires = time.Now().Add(durFromNow)
+		c.MaxAge = int(durFromNow.Seconds())
+	}
+}
+
+// CookieHTTPOnly is a `CookieOption`.
+// Use it to set the cookie's HttpOnly field to false or true.
+// HttpOnly field defaults to true for `RemoveCookie` and `SetCookieKV`.
+func CookieHTTPOnly(httpOnly bool) CookieOption {
+	return func(c *http.Cookie) {
+		c.HttpOnly = httpOnly
+	}
+}
+
+// SetCookie adds a cookie.
+// Use of the "options" is not required, they can be used to amend the "cookie".
+//
+// Example: https://github.com/kataras/iris/tree/master/_examples/cookies/basic
+func (ctx *context) SetCookie(cookie *http.Cookie, options ...CookieOption) {
+	for _, opt := range options {
+		opt(cookie)
+	}
+
 	http.SetCookie(ctx.writer, cookie)
 }
 
-var (
+// SetCookieKV adds a cookie, requires the name(string) and the value(string).
-	// SetCookieKVExpiration is 2 hours by-default
-	// you can change it or simple, use the SetCookie for more control.
-	SetCookieKVExpiration = time.Duration(120) * time.Minute
-)
-
-// SetCookieKV adds a cookie, receives just a name(string) and a value(string)
 //
-// If you use this method, it expires at 2 hours
+// By default it expires at 2 hours and it's added to the root path,
-// use ctx.SetCookie or http.SetCookie if you want to change more fields.
+// use the `CookieExpires` and `CookiePath` to modify them.
-func (ctx *context) SetCookieKV(name, value string) {
+// Alternatively: ctx.SetCookie(&http.Cookie{...})
+//
+// If you want to set custom the path:
+// ctx.SetCookieKV(name, value, iris.CookiePath("/custom/path/cookie/will/be/stored"))
+//
+// If you want to be visible only to current request path:
+// (note that client should be responsible for that if server sent an empty cookie's path, all browsers are compatible)
+// ctx.SetCookieKV(name, value, iris.CookieCleanPath/iris.CookiePath(""))
+// More:
+//                              iris.CookieExpires(time.Duration)
+//                              iris.CookieHTTPOnly(false)
+//
+// Examples: https://github.com/kataras/iris/tree/master/_examples/cookies/basic
+func (ctx *context) SetCookieKV(name, value string, options ...CookieOption) {
 	c := &http.Cookie{}
+	c.Path = "/"
 	c.Name = name
 	c.Value = url.QueryEscape(value)
 	c.HttpOnly = true
 	c.Expires = time.Now().Add(SetCookieKVExpiration)
 	c.MaxAge = int(SetCookieKVExpiration.Seconds())
-	ctx.SetCookie(c)
+	ctx.SetCookie(c, options...)
 }
 
 // GetCookie returns cookie's value by it's name
 // returns empty string if nothing was found.
-func (ctx *context) GetCookie(name string) string {
+//
+// If you want more than the value then:
+// cookie, err := ctx.Request().Cookie("name")
+//
+// Example: https://github.com/kataras/iris/tree/master/_examples/cookies/basic
+func (ctx *context) GetCookie(name string, options ...CookieOption) string {
 	cookie, err := ctx.request.Cookie(name)
 	if err != nil {
 		return ""
 	}
+
+	// TODO:
+	// Q: Why named as `CookieOption` and not like `CookieInterceptor`?
+	// A: Because an interceptor would be able to modify the cookie AND stop the 'x' operation, but we don't want to cancel anything.
+	//
+	// Q: Why "Cookie Options" here?
+	// A: Because of the future suport of cookie encoding like I did with sessions.
+	//    Two impl ideas:
+	//     - Do it so each caller of `GetCookie/SetCookieKV/SetCookie` can have each own encoding or share one, no limit.
+	//     - Do it so every of the above three methods will use the same encoding, therefore to the Application's level, limit per Iris app.
+	//    We'll see...
+	//
+	// Finally, I should not forget to add links for the new translated READMEs(2) and push a new version with the minor changes so far,
+	// API is stable, so relax and do it on the next commit tomorrow, need sleep.
+	for _, opt := range options {
+		opt(cookie)
+	}
+
 	value, _ := url.QueryUnescape(cookie.Value)
 	return value
 }
 
-// RemoveCookie deletes a cookie by it's name.
+// SetCookieKVExpiration is 2 hours by-default
-func (ctx *context) RemoveCookie(name string) {
+// you can change it or simple, use the SetCookie for more control.
+//
+// See `SetCookieKVExpiration` and `CookieExpires` for more.
+var SetCookieKVExpiration = time.Duration(120) * time.Minute
+
+// RemoveCookie deletes a cookie by it's name and path = "/".
+// Tip: change the cookie's path to the current one by: RemoveCookie("name", iris.CookieCleanPath)
+//
+// Example: https://github.com/kataras/iris/tree/master/_examples/cookies/basic
+func (ctx *context) RemoveCookie(name string, options ...CookieOption) {
 	c := &http.Cookie{}
 	c.Name = name
 	c.Value = ""
-	c.Path = "/"
+	c.Path = "/" // if user wants to change it, use of the CookieOption `CookiePath` is required if not `ctx.SetCookie`.
 	c.HttpOnly = true
-	// RFC says 1 second, but let's do it 1 minute to make sure is working
+	// RFC says 1 second, but let's do it 1  to make sure is working
 	exp := time.Now().Add(-time.Duration(1) * time.Minute)
 	c.Expires = exp
 	c.MaxAge = -1
-	ctx.SetCookie(c)
+	ctx.SetCookie(c, options...)
 	// delete request's cookie also, which is temporary available.
 	ctx.request.Header.Set("Cookie", "")
 }

go19.go

@@ -71,4 +71,14 @@ type (
 	//
 	// See `ExecutionRules` and `core/router/Party#SetExecutionRules` for more.
 	ExecutionOptions = router.ExecutionOptions
+
+	// CookieOption is the type of function that is accepted on
+	// context's methods like `SetCookieKV`, `RemoveCookie` and `SetCookie`
+	// as their (last) variadic input argument to amend the end cookie's form.
+	//
+	// Any custom or built'n `CookieOption` is valid,
+	// see `CookiePath`, `CookieCleanPath`, `CookieExpires` and `CookieHTTPOnly` for more.
+	//
+	// An alias for the `context/Context#CookieOption`.
+	CookieOption = context.CookieOption
 )

httptest/httptest.go

@@ -87,6 +87,7 @@ func New(t *testing.T, app *iris.Application, setters ...OptionSetter) *httpexpe
 	// set the logger or disable it (default) and disable the updater (for any case).
 	app.Configure(iris.WithoutVersionChecker)
 	app.Logger().SetLevel(conf.LogLevel)
+
 	if err := app.Build(); err != nil {
 		if conf.Debug && (conf.LogLevel == "disable" || conf.LogLevel == "disabled") {
 			app.Logger().Println(err.Error())

iris.go

@@ -422,6 +422,28 @@ var (
 	//
 	// A shortcut of the `cache#Cache304`.
 	Cache304 = cache.Cache304
+
+	// CookiePath is a `CookieOption`.
+	// Use it to change the cookie's Path field.
+	//
+	// A shortcut for the `context#CookiePath`.
+	CookiePath = context.CookiePath
+	// CookieCleanPath is a `CookieOption`.
+	// Use it to clear the cookie's Path field, exactly the same as `CookiePath("")`.
+	//
+	// A shortcut for the `context#CookieCleanPath`.
+	CookieCleanPath = context.CookieCleanPath
+	// CookieExpires is a `CookieOption`.
+	// Use it to change the cookie's Expires and MaxAge fields by passing the lifetime of the cookie.
+	//
+	// A shortcut for the `context#CookieExpires`.
+	CookieExpires = context.CookieExpires
+	// CookieHTTPOnly is a `CookieOption`.
+	// Use it to set the cookie's HttpOnly field to false or true.
+	// HttpOnly field defaults to true for `RemoveCookie` and `SetCookieKV`.
+	//
+	// A shortcut for the `context#CookieHTTPOnly`.
+	CookieHTTPOnly = context.CookieHTTPOnly
 )
 
 // SPA  accepts an "assetHandler" which can be the result of an