http: print nice error if cert exists but key does not

diff --git a/modules/http/http.lua.in b/modules/http/http.lua.in
index ed4866234bffcb18f024eabc4ae8d30610589458..a1e8486c668734b257f514fca95aa4ec6f786080 100644 (file)
--- a/modules/http/http.lua.in
+++ b/modules/http/http.lua.in
@@ -299,6 +299,10 @@ function M.add_interface(conf)
                        -- Continue reading key file
                        if crt then
                                f = io.open(conf.key, 'r')
+                               if not f then
+                                       panic('enable to open HTTP key file %s',
+                                               conf.key)
+                               end
                                key = assert(pkey.new(f:read('*all')))
                                f:close()
                        end