Rough implementation of auto HTTP->HTTPS redirects

Also added GracePeriod for server shutdowns

modules/caddyhttp/staticresp.go

@@ -0,0 +1,57 @@
+package caddyhttp
+
+import (
+	"fmt"
+	"net/http"
+
+	"bitbucket.org/lightcodelabs/caddy2"
+)
+
+func init() {
+	caddy2.RegisterModule(caddy2.Module{
+		Name: "http.responders.static",
+		New:  func() (interface{}, error) { return new(Static), nil },
+	})
+}
+
+// Static implements a simple responder for static responses.
+// It is Caddy's default responder. TODO: Or is it?
+type Static struct {
+	StatusCode int         `json:"status_code"`
+	Headers    http.Header `json:"headers"`
+	Body       string      `json:"body"`
+	Close      bool        `json:"close"`
+}
+
+func (s Static) ServeHTTP(w http.ResponseWriter, r *http.Request) error {
+	repl := r.Context().Value(ReplacerCtxKey).(*Replacer)
+
+	// close the connection
+	r.Close = s.Close
+
+	// set all headers, with replacements
+	for field, vals := range s.Headers {
+		field = repl.Replace(field, "")
+		for i := range vals {
+			vals[i] = repl.Replace(vals[i], "")
+		}
+		w.Header()[field] = vals
+	}
+
+	// write the headers with a status code
+	statusCode := s.StatusCode
+	if statusCode == 0 {
+		statusCode = http.StatusOK
+	}
+	w.WriteHeader(statusCode)
+
+	// write the response body, with replacements
+	if s.Body != "" {
+		fmt.Fprint(w, repl.Replace(s.Body, ""))
+	}
+
+	return nil
+}
+
+// Interface guard
+var _ Handler = (*Static)(nil)