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middleware.go
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middleware.go
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package rest
import (
"encoding/json"
"log"
"net/http"
"runtime/debug"
"strings"
)
// Ping middleware response with pong to /ping. Stops chain if ping request detected
func Ping(next http.Handler) http.Handler {
fn := func(w http.ResponseWriter, r *http.Request) {
if r.Method == "GET" && strings.HasSuffix(strings.ToLower(r.URL.Path), "/ping") {
w.Header().Set("Content-Type", "text/plain")
w.WriteHeader(http.StatusOK)
_, _ = w.Write([]byte("pong"))
return
}
if r.Method == "POST" && strings.HasSuffix(strings.ToLower(r.URL.Path), "/ping") {
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(http.StatusOK)
resp := make(map[string]string)
resp["message"] = "PONG"
jsonResp, _ := json.Marshal(resp)
_, _ = w.Write(jsonResp)
return
}
next.ServeHTTP(w, r)
}
return http.HandlerFunc(fn)
}
func PanicRecovery(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
defer func() {
if err := recover(); err != nil {
http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
log.Println("An error occurred:", err)
log.Println(string(debug.Stack()))
}
}()
next.ServeHTTP(w, req)
})
}
func AppInfo(app, author, version string) func(http.Handler) http.Handler {
f := func(h http.Handler) http.Handler {
fn := func(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Author", author)
w.Header().Set("App-Name", app)
w.Header().Set("App-Version", version)
h.ServeHTTP(w, r)
}
return http.HandlerFunc(fn)
}
return f
}