refact: refactored proxy script builtins in separated file.

modules/http_proxy_script_builtins.go

@@ -0,0 +1,30 @@
+package modules
+
+import (
+	"io/ioutil"
+
+	"github.com/evilsocket/bettercap-ng/log"
+
+	"github.com/robertkrimen/otto"
+)
+
+// define functions available to proxy scripts
+func (s *ProxyScript) defineBuiltins() error {
+	s.VM.Set("readFile", func(call otto.FunctionCall) otto.Value {
+		filename := call.Argument(0).String()
+		raw, err := ioutil.ReadFile(filename)
+		if err != nil {
+			log.Error("Could not read %s: %s", filename, err)
+			return otto.Value{}
+		}
+
+		v, err := s.VM.ToValue(string(raw))
+		if err != nil {
+			log.Error("Could not convert to string: %s", err)
+			return otto.Value{}
+		}
+		return v
+	})
+
+	return nil
+}