Add exception catching

Author: bor3ham

servers/detail.go

@@ -8,6 +8,9 @@ import (
 
 func DetailHandler(s schema.Server, m *schema.Model, w http.ResponseWriter, r *http.Request) {
 	rc := NewRequestContext(s, w, r)
+
+	defer catchExceptions(rc, w)()
+
 	err := rc.Authenticate()
 	if err != nil {
 		return

servers/exceptions.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"github.com/bor3ham/reja/schema"
 	"net/http"
+	"log"
 )
 
 type Error struct {
@@ -55,3 +56,25 @@ func MethodNotAllowed(c schema.Context, w http.ResponseWriter) {
 	w.WriteHeader(http.StatusForbidden)
 	c.WriteToResponse(errorBlob)
 }
+
+func InternalServerError(c schema.Context, w http.ResponseWriter) {
+	errorBlob := Error{
+		Exceptions: []Exception{
+			Exception{
+				Title: "Internal Server Error",
+				Detail: "Something went wrong. Please try again later.",
+			},
+		},
+	}
+	w.WriteHeader(http.StatusInternalServerError)
+	c.WriteToResponse(errorBlob)
+}
+
+func catchExceptions(c schema.Context, w http.ResponseWriter) func() {
+	return func() {
+		if err := recover(); err != nil {
+			InternalServerError(c, w)
+			log.Printf("Runtime panic: %v", err)
+		}
+	}
+}

servers/list.go

@@ -7,6 +7,9 @@ import (
 
 func ListHandler(s schema.Server, m *schema.Model, w http.ResponseWriter, r *http.Request) {
 	rc := NewRequestContext(s, w, r)
+
+	defer catchExceptions(rc, w)()
+
 	err := rc.Authenticate()
 	if err != nil {
 		return