Lots of code cleanup, better error handling, etc...

cmd/warewulfd/runtime.go

@@ -0,0 +1,46 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"net/http"
+	"strconv"
+	"strings"
+)
+
+func runtime(w http.ResponseWriter, req *http.Request) {
+
+	node, err := getSanity(req)
+	if err != nil {
+		w.WriteHeader(404)
+		log.Panicln(err)
+		return
+	}
+
+	remote := strings.Split(req.RemoteAddr, ":")
+	port, err := strconv.Atoi(remote[1])
+	if err != nil {
+		w.WriteHeader(404)
+		log.Printf("Could not convert port to integer: %s\n", remote[1])
+		return
+	}
+
+	if port >= 1024 {
+		log.Panicf("DENIED: Connection coming from non-privledged port: %s\n", req.RemoteAddr)
+		return
+	}
+
+	if node.Overlay!= "" {
+		fileName := fmt.Sprintf("%s/provision/runtime/%s.img", LocalStateDir, node.Fqdn)
+
+		err := sendFile(w, fileName, node.Fqdn)
+		if err != nil {
+			log.Println(err)
+		}
+	} else {
+		w.WriteHeader(503)
+		log.Printf("No Overlay set for node %s\n", node.Fqdn)
+	}
+
+	return
+}