iris/_examples/response-writer/cache/simple/main.go
2023-09-26 21:14:57 +03:00

103 lines
3.1 KiB
Go

package main
import (
"time"
"github.com/kataras/iris/v12"
"github.com/kataras/iris/v12/cache"
"github.com/kataras/iris/v12/middleware/basicauth"
)
var markdownContents = []byte(`## Hello Markdown
This is a sample of Markdown contents
Features
--------
All features of Sundown are supported, including:
* **Compatibility**. The Markdown v1.0.3 test suite passes with
the --tidy option. Without --tidy, the differences are
mostly in whitespace and entity escaping, where blackfriday is
more consistent and cleaner.
`)
// Cache should not be used on handlers that contain dynamic data.
// Cache is a good and a must-feature on static content, i.e "about page" or for a whole blog site.
func main() {
app := iris.New()
app.Logger().SetLevel("debug")
app.Get("/", cache.Handler(10*time.Second), writeMarkdown)
// To customize the cache handler:
// cache.Cache(nil).MaxAge(func(ctx iris.Context) time.Duration {
// return time.Duration(ctx.MaxAge()) * time.Second
// }).AddRule(...).Store(...)
// saves its content on the first request and serves it instead of re-calculating the content.
// After 10 seconds it will be cleared and reset.
pages := app.Party("/pages")
pages.Use(cache.Handler(10 * time.Second)) // Per Party.
pages.Get("/", pagesIndex)
pages.Post("/", pagesIndexPost)
// Note: on authenticated requests
// the cache middleare does not run at all (see iris/cache/ruleset).
auth := basicauth.Default(map[string]string{
"admin": "admin",
})
app.Get("/protected", auth, cache.Handler(5*time.Second), protected)
// Set custom cache key/identifier,
// for the sake of the example
// we will SHARE the keys on both GET and POST routes
// so the first one is executed that's the body
// for both of the routes. Please don't do that
// on production, this is just an example.
custom := app.Party("/custom")
custom.Use(cache.WithKey("shared"))
custom.Use(cache.Handler(10 * time.Second))
custom.Get("/", customIndex)
custom.Post("/", customIndexPost)
app.Listen(":8080")
}
func writeMarkdown(ctx iris.Context) {
// tap multiple times the browser's refresh button and you will
// see this println only once every 10 seconds.
println("Handler executed. Content refreshed.")
ctx.Markdown(markdownContents)
}
func pagesIndex(ctx iris.Context) {
println("Handler executed. Content refreshed.")
ctx.WriteString("GET: hello")
}
func pagesIndexPost(ctx iris.Context) {
println("Handler executed. Content refreshed.")
ctx.WriteString("POST: hello")
}
func protected(ctx iris.Context) {
username, _, _ := ctx.Request().BasicAuth()
ctx.Writef("Hello, %s!", username)
}
func customIndex(ctx iris.Context) {
ctx.WriteString("Contents from GET custom index")
}
func customIndexPost(ctx iris.Context) {
ctx.WriteString("Contents from POST custom index")
}
/* Note that `HandleDir` does use the browser's disk caching by-default
therefore, register the cache handler AFTER any HandleDir calls,
for a faster solution that server doesn't need to keep track of the response
navigate to https://github.com/kataras/iris/blob/main/_examples/cache/client-side/main.go.
The `HandleDir` has its own cache mechanism, read the 'file-server' examples. */