Go实战--也许最快的Go语言Web框架kataras/iris初识二(TOML、Cache、Cookie)

生命不止，继续 go go go!!!

昨天介绍了iris框架，介绍了如何使用basic认证、Markdown、YAML、Json等：
Go实战–也许最快的Go语言Web框架kataras/iris初识(basic认证、Markdown、YAML、Json)

继续跟大家一起学习iris框架.

TOML

什么是toml?
toml也是一种配置文件，关于golang中配置文件的使用之前也有介绍过：
Go实战–go语言中使用YAML配置文件(与json、xml、ini对比)

toml是Tom’s Obvious, Minimal Language.的缩写！

配置文件的使用由来已久，从.ini、XML、JSON、YAML再到TOML，语言的表达能力越来越强，同时书写便捷性也在不断提升。 TOML是前GitHub CEO， Tom Preston-Werner，于2013年创建的语言，其目标是成为一个小规模的易于使用的语义化配置文件格式。TOML被设计为可以无二义性的转换为一个哈希表(Hash table)。

github地址：
https://github.com/toml-lang/toml

Star: 6478

例子

# This is a TOML document.title = "TOML Example"[owner]name = "Tom Preston-Werner"dob = 1979-05-27T07:32:00-08:00 # First class dates[database]server = "192.168.1.1"ports = [ 8001, 8001, 8002 ]connection_max = 5000enabled = true[servers]  # Indentation (tabs and/or spaces) is allowed but not required  [servers.alpha]  ip = "10.0.0.1"  dc = "eqdc10"  [servers.beta]  ip = "10.0.0.2"  dc = "eqdc10"[clients]data = [ ["gamma", "delta"], [1, 2] ]# Line breaks are OK when inside arrayshosts = [  "alpha",  "omega"]

看到了吧，不关心空格和缩进。

规范
大小写敏感
必须是UTF-8编码
不关心空格、缩进
使用#进行注释

Go中操作TOML的优秀开源库
https://github.com/BurntSushi/toml
https://github.com/pelletier/go-toml
具体的之后会专业写博客介绍

iris读取toml
新建iris.tml文件：

DisablePathCorrection = falseEnablePathEscape = falseFireMethodNotAllowed = trueDisableBodyConsumptionOnUnmarshal = falseTimeFormat = "Mon, 01 Jan 2006 15:04:05 GMT"Charset = "UTF-8"[Other]    MyServerName = "iris"

main.go:

package mainimport (    "github.com/kataras/iris"    "github.com/kataras/iris/context")func main() {    app := iris.New()    app.Get("/", func(ctx context.Context) {        ctx.HTML("<b>Hello Iris TOML!</b>")    })    app.Run(iris.Addr(":8080"), iris.WithConfiguration(iris.TOML("iris.tml")))}

Cache

关于缓存，一直没有跟大家介绍，github上也有很多关于golang的优秀的Cache库：
patrickmn/go-cache
An in-memory key:value store/cache (similar to Memcached) library for Go, suitable for single-machine applications.

golang/groupcache
groupcache is a caching and cache-filling library, intended as a replacement for memcached in many cases.
同样，我们以后再进行详细介绍，这里我们看看iris中使用Cache：

package mainimport (    "time"    "github.com/kataras/iris"    "github.com/kataras/iris/cache"    "github.com/kataras/iris/context")func main() {    app := iris.Default()    cachedHandler := cache.WrapHandler(h, 2*time.Minute)    app.Get("/hello", cachedHandler)    app.Run(iris.Addr(":8080"))}func h(ctx context.Context) {    ctx.HTML("<h1> Hello, this should be cached. Every 2 minutes it will be refreshed, check your browser's inspector</h1>")}

cookie

关于cookie，之前也有些文章分享过：
Go实战–go中使用cookie(The way to go)

iris当然不会缺少cookie的功能了。

package mainimport (    "github.com/kataras/iris"    "github.com/kataras/iris/context"    "github.com/kataras/iris/sessions"    "github.com/gorilla/securecookie")func newApp() *iris.Application {    app := iris.New()    cookieName := "mycustomsessionid"    // AES only supports key sizes of 16, 24 or 32 bytes.    // You either need to provide exactly that amount or you derive the key from what you type in.    hashKey := []byte("the-big-and-secret-fash-key-here")    blockKey := []byte("lot-secret-of-characters-big-too")    secureCookie := securecookie.New(hashKey, blockKey)    mySessions := sessions.New(sessions.Config{        Cookie: cookieName,        Encode: secureCookie.Encode,        Decode: secureCookie.Decode,    })    app.Get("/", func(ctx context.Context) {        ctx.Writef("You should navigate to the /set, /get, /delete, /clear,/destroy instead")    })    app.Get("/set", func(ctx context.Context) {        //set session values        s := mySessions.Start(ctx)        s.Set("name", "iris")        //test if setted here        ctx.Writef("All ok session setted to: %s", s.GetString("name"))    })    app.Get("/get", func(ctx context.Context) {        // get a specific key, as string, if no found returns just an empty string        s := mySessions.Start(ctx)        name := s.GetString("name")        ctx.Writef("The name on the /set was: %s", name)    })    app.Get("/delete", func(ctx context.Context) {        // delete a specific key        s := mySessions.Start(ctx)        s.Delete("name")    })    app.Get("/clear", func(ctx context.Context) {        // removes all entries        mySessions.Start(ctx).Clear()    })    app.Get("/update", func(ctx context.Context) {        // updates expire date with a new date        mySessions.ShiftExpiration(ctx)    })    app.Get("/destroy", func(ctx context.Context) {        //destroy, removes the entire session data and cookie        mySessions.Destroy(ctx)    })    return app}func main() {    app := newApp()    app.Run(iris.Addr(":8080"))}

浏览器访问：http://localhost:8080/set
http://localhost:8080/get