diff --git a/recovery.go b/recovery.go
new file mode 100644
index 0000000..9debe98
--- /dev/null
+++ b/recovery.go
@@ -0,0 +1,69 @@
+package narco
+
+import (
+ "fmt"
+ "io"
+ "log"
+ "net/http"
+ "os"
+ "runtime"
+
+ "github.com/codemodus/chain"
+ "golang.org/x/net/context"
+)
+
+type StackResponseFormatter func(w io.Writer, err interface{}, stack []byte)
+
+func GoFormatStack(w io.Writer, err interface{}, stack []byte) {
+ fmt.Fprintf(w, "Server internal error: %s\n%s", err, stack)
+}
+
+func HtmlFormatStack(w io.Writer, err interface{}, stack []byte) {
+ fmt.Fprintf(w, `
+
+ Server internal error: %s
+ %s
+
+`, err, stack)
+}
+
+type Recoverer struct {
+ Logger *log.Logger
+ ShowStackInResponse StackResponseFormatter
+ StackOtherGoroutine bool
+}
+
+func NewRecoverer() *Recoverer {
+ return &Recoverer{
+ Logger: log.New(os.Stdout, "[narco] ", log.LstdFlags),
+ ShowStackInResponse: nil,
+ StackOtherGoroutine: false,
+ }
+}
+
+func (rec *Recoverer) Wrap() func(chain.Handler) chain.Handler {
+ return func(other chain.Handler) chain.Handler {
+ return chain.HandlerFunc(func(ctx context.Context, h http.ResponseWriter, req *http.Request) {
+ defer func() {
+ err := recover()
+ if err == nil {
+ return
+ }
+ // h.Header()["Content-Type"] = []string{"text/html; charset=utf-8"}
+ h.WriteHeader(http.StatusInternalServerError)
+
+ stack := make([]byte, 8*1024)
+ stack = stack[:runtime.Stack(stack, rec.StackOtherGoroutine)]
+ rec.Logger.Printf("PANIC: %s\n%s", err, stack)
+
+ if rec.ShowStackInResponse != nil {
+ rec.ShowStackInResponse(h, err, stack)
+ } else {
+ fmt.Fprintf(h, "%s\n", http.StatusText(http.StatusInternalServerError))
+ }
+ }()
+
+ other.ServeHTTPContext(ctx, h, req)
+ })
+ }
+}