60 lines
1.6 KiB
Go
60 lines
1.6 KiB
Go
package rest
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import (
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"net/http"
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"os"
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"runtime/debug"
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"strings"
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"github.com/go-pkgz/rest/logger"
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)
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// AppInfo adds custom app-info to the response header
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func AppInfo(app string, author string, version string) func(http.Handler) http.Handler {
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f := func(h http.Handler) http.Handler {
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fn := func(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("Author", author)
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w.Header().Set("App-Name", app)
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w.Header().Set("App-Version", version)
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if mhost := os.Getenv("MHOST"); mhost != "" {
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w.Header().Set("Host", mhost)
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}
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h.ServeHTTP(w, r)
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}
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return http.HandlerFunc(fn)
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}
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return f
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}
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// Ping middleware response with pong to /ping. Stops chain if ping request detected
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func Ping(next http.Handler) http.Handler {
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fn := func(w http.ResponseWriter, r *http.Request) {
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if r.Method == "GET" && strings.HasSuffix(strings.ToLower(r.URL.Path), "/ping") {
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w.Header().Set("Content-Type", "text/plain")
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w.WriteHeader(http.StatusOK)
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w.Write([]byte("pong")) //nolint
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return
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}
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next.ServeHTTP(w, r)
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}
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return http.HandlerFunc(fn)
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}
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// Recoverer is a middleware that recovers from panics, logs the panic and returns a HTTP 500 status if possible.
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func Recoverer(l logger.Backend) func(http.Handler) http.Handler {
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return func(h http.Handler) http.Handler {
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fn := func(w http.ResponseWriter, r *http.Request) {
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defer func() {
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if rvr := recover(); rvr != nil {
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l.Logf("request panic, %v", rvr)
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l.Logf(string(debug.Stack()))
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http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
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}
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}()
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h.ServeHTTP(w, r)
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}
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return http.HandlerFunc(fn)
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}
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}
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