From c7fd41469995d9bcf8fd90913a2f941ee5d7ab8e Mon Sep 17 00:00:00 2001
From: Patrick Peng Sun <patrick@lawipac.com>
Date: Sun, 16 Jul 2017 03:56:11 +1000
Subject: [PATCH] adding common handlers.

---
 server.go | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/server.go b/server.go
index ae04502..a980df2 100644
--- a/server.go
+++ b/server.go
@@ -339,6 +339,16 @@ func getCrmFileID(urlPath string) string {
 	return strings.TrimPrefix(urlPath, "/crmfiles/")
 }
 
+func response400Handler(w http.ResponseWriter) {
+	w.WriteHeader(http.StatusBadRequest)
+	str, err := ioutil.ReadFile(GlobalPath.SinglePageEdit + "400.html")
+	if err == nil {
+		fmt.Fprintf(w, "%s", str)
+		return
+	}
+	fmt.Fprintf(w, "bad request")
+}
+
 func response404Handler(w http.ResponseWriter) {
 	w.WriteHeader(http.StatusNotFound)
 	str, err := ioutil.ReadFile(GlobalPath.SinglePageEdit + "404.html")
@@ -349,6 +359,25 @@ func response404Handler(w http.ResponseWriter) {
 	fmt.Fprintf(w, "not found")
 }
 
+func response403Handler(w http.ResponseWriter) {
+	w.WriteHeader(http.StatusUnauthorized)
+	str, err := ioutil.ReadFile(GlobalPath.SinglePageEdit + "403.html")
+	if err == nil {
+		fmt.Fprintf(w, "%s", str)
+		return
+	}
+	fmt.Fprintf(w, "not authorized")
+}
+
+func response500Handler(w http.ResponseWriter) {
+	w.WriteHeader(http.StatusInternalServerError)
+	str, err := ioutil.ReadFile(GlobalPath.SinglePageEdit + "500.html")
+	if err == nil {
+		fmt.Fprintf(w, "%s", str)
+		return
+	}
+	fmt.Fprintf(w, "server internal error")
+}
 func getHTTPRequestQuery(r *http.Request, name string) (value string) {
 	rq := r.URL.RawQuery
 	m, _ := url.ParseQuery(rq)