fix(helpers): fix crash in formatHttpRequest

Fixes: #17

Author: trentm

helpers/CHANGELOG.md

@@ -2,6 +2,8 @@
 
 ## Unreleased
 
+- Fix possible crash in `formatHttpRequest` if `req.socket` is not available.
+  ([#17](https://github.com/elastic/ecs-logging-nodejs/issues/17))
 - Add support for the hapi request object being passed to `formatHttpRequest`
   and `formatHttpResponse`.
 - Fix the setting of the remote IP and port

helpers/lib/http-formatters.js

@@ -46,7 +46,7 @@ function formatHttpRequest (ecs, req) {
   ecs.http.request.method = method.toLowerCase()
 
   ecs.url = ecs.url || {}
-  ecs.url.full = (socket.encrypted ? 'https://' : 'http://') + headers.host + url
+  ecs.url.full = (socket && socket.encrypted ? 'https://' : 'http://') + headers.host + url
   const hasQuery = url.indexOf('?')
   const hasAnchor = url.indexOf('#')
   if (hasQuery > -1 && hasAnchor > -1) {