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add example for simple http.Handler wrapper
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kataras
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@ -13,7 +13,7 @@
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# Iris Web Framework <a href="README_GR.md"><img width="20px" src="https://iris-go.com/images/flag-greece.svg" /></a> <a href="README_FR.md"><img width="20px" src="https://iris-go.com/images/flag-france.svg" /></a> <a href="README_ZH.md"><img width="20px" src="https://iris-go.com/images/flag-china.svg" /></a> <a href="README_ES.md"><img width="20px" src="https://iris-go.com/images/flag-spain.png" /></a> <a href="README_FA.md"><img width="20px" src="https://iris-go.com/images/flag-iran.svg" /></a> <a href="README_RU.md"><img width="20px" src="https://iris-go.com/images/flag-russia.svg" /></a> <a href="README_KO.md"><img width="20px" src="https://iris-go.com/images/flag-south-korea.svg?v=12" /></a>
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[](https://github.com/kataras/iris/actions) [](https://github.com/kataras/iris/tree/master/_examples) [](https://gitter.im/iris_go/community) <!--[](https://app.fossa.io/projects/git%2Bgithub.com%2Fkataras%2Firis?ref=badge_shield)--> [](https://iris-go.com/donate) <!--[](https://goreportcard.com/report/github.com/kataras/iris)--><!--[](https://pkg.go.dev/github.com/kataras/iris/v12@v12.2.0)--> <!-- [](https://github.com/kataras/iris/releases) -->
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[](https://github.com/kataras/iris/actions) [](https://github.com/kataras/iris/tree/master/_examples) [](https://gitter.im/iris_go/community) <!--[](https://app.fossa.io/projects/git%2Bgithub.com%2Fkataras%2Firis?ref=badge_shield)--> [](https://iris-go.com/donate) <!--[](https://goreportcard.com/report/github.com/kataras/iris)--><!--[](https://pkg.go.dev/github.com/kataras/iris/v12@v12.2.0)--> <!-- [](https://github.com/kataras/iris/releases) -->
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<!-- <a href="https://iris-go.com"> <img align="right" src="https://iris-go.com/images/logo-w169.png"></a> -->
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@ -70,7 +70,8 @@
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* Convert net/http Handlers
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* [From func(w http.ResponseWriter, r *http.Request, next http.HandlerFunc)](convert-handlers/negroni-like/main.go)
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* [From http.Handler or http.HandlerFunc](convert-handlers/nethttp/main.go)
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* [From func(http.HandlerFunc) http.HandlerFunc](convert-handlers/real-usecase-raven/writing-middleware/main.go)
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* [From func(http.Handler) http.Handler](convert-handlers/wrapper/main.go)
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* [Convert by your own: sentry/raven middleware](convert-handlers/real-usecase-raven/writing-middleware/main.go)
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* [Rewrite Middleware](routing/rewrite/main.go)
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* [Route State](routing/route-state/main.go)
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* [Remove Route](routing/remove-route/main.go)
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50
_examples/convert-handlers/nethttp/wrapper/main.go
Normal file
50
_examples/convert-handlers/nethttp/wrapper/main.go
Normal file
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@ -0,0 +1,50 @@
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package main
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import (
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"context"
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"net/http"
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"github.com/kataras/iris/v12"
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)
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func main() {
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app := iris.New()
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httpThirdPartyWrapper := StandardWrapper(Options{
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Message: "test_value",
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})
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// This case
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app.WrapRouter(func(w http.ResponseWriter, r *http.Request, router http.HandlerFunc) {
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httpThirdPartyWrapper(router).ServeHTTP(w, r)
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// If was func(http.HandlerFunc) http.HandlerFunc:
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// httpThirdPartyWrapper(router.ServeHTTP).ServeHTTP(w, r)
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})
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app.Get("/", index)
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app.Listen(":8080")
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}
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func index(ctx iris.Context) {
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ctx.Writef("Message: %s\n", ctx.Value(msgContextKey))
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}
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type Options struct {
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Message string
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}
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type contextKey uint8
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var (
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msgContextKey contextKey = 1
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)
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func StandardWrapper(opts Options) func(http.Handler) http.Handler {
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return func(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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// ...
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req := r.WithContext(context.WithValue(r.Context(), msgContextKey, opts.Message))
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next.ServeHTTP(w, req)
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})
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}
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}
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@ -32,6 +32,17 @@ func FromStd(handler interface{}) context.Handler {
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// handlerFunc(w,r, http.HandlerFunc)
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//
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return FromStdWithNext(h)
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case func(http.Handler) http.Handler:
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panic(fmt.Errorf(`
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Passed handler cannot be converted directly:
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- http.Handler(http.Handler)
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---------------------------------------------------------------------
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Please use the Application.WrapRouter method instead, example code:
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app := iris.New()
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// ...
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app.WrapRouter(func(w http.ResponseWriter, r *http.Request, router http.HandlerFunc) {
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httpThirdPartyHandler(router).ServeHTTP(w, r)
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})`))
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default:
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// No valid handler passed
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panic(fmt.Errorf(`
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