26 lines
554 B
Go
26 lines
554 B
Go
// ## Middleware
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package main
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import "net/http"
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import "fmt"
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func hello(res http.ResponseWriter, req *http.Request) {
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res.Header().Set("Content-Type", "text/plain")
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fmt.Fprintln(res, "Hello wrapped world")
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}
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func wrapMiddleware(f http.HandlerFunc) http.HandlerFunc {
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return func(res http.ResponseWriter, req *http.Request) {
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fmt.Println("before")
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f(res, req)
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fmt.Println("after")
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}
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}
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func main() {
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handler := wrapMiddleware(hello)
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http.HandleFunc("/", handler)
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http.ListenAndServe(":5000", nil)
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}
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