Add headers to env for default functions

api/agent/call.go

@@ -103,12 +103,24 @@ func FromRequest(appName, path string, req *http.Request) CallOpt {
 			envVars[toEnvName("PARAM", param.Key)] = param.Value
 		}
 
+		var headerVars = make(map[string]string)
+		for k, v := range req.Header {
+			joinedHeader := strings.Join(v,",")
+			headerVars[toEnvName("HEADER",k)] = joinedHeader
+		}
+
 		// add all the env vars we build to the request headers
 		// TODO should we save req.Headers and copy OVER app.Config / route.Config ?
 		for k, v := range envVars {
 			req.Header.Add(k, v)
 		}
 
+		for k,v := range headerVars {
+			envVars[k] = v
+		}
+
+
+
 		// TODO this relies on ordering of opts, but tests make sure it works, probably re-plumb/destroy headers
 		if rw, ok := c.w.(http.ResponseWriter); ok {
 			rw.Header().Add("FN_CALL_ID", id)