lua: Preload gluahttp module (#328)

go.mod

@@ -18,6 +18,7 @@ require (
 require (
 	github.com/aymerick/douceur v0.2.0 // indirect
 	github.com/cention-sany/utf7 v0.0.0-20170124080048-26cad61bd60a // indirect
+	github.com/cjoudrey/gluahttp v0.0.0-20201111170219-25003d9adfa9 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/go-test/deep v1.1.0 // indirect
 	github.com/gogs/chardet v0.0.0-20211120154057-b7413eaefb8f // indirect

go.sum

@@ -2,6 +2,8 @@ github.com/aymerick/douceur v0.2.0 h1:Mv+mAeH1Q+n9Fr+oyamOlAkUNPWPlA8PPGR0QAaYuP
 github.com/aymerick/douceur v0.2.0/go.mod h1:wlT5vV2O3h55X9m7iVYN0TBM0NH/MmbLnd30/FjWUq4=
 github.com/cention-sany/utf7 v0.0.0-20170124080048-26cad61bd60a h1:MISbI8sU/PSK/ztvmWKFcI7UGb5/HQT7B+i3a2myKgI=
 github.com/cention-sany/utf7 v0.0.0-20170124080048-26cad61bd60a/go.mod h1:2GxOXOlEPAMFPfp014mK1SWq8G8BN8o7/dfYqJrVGn8=
+github.com/cjoudrey/gluahttp v0.0.0-20201111170219-25003d9adfa9 h1:rdWOzitWlNYeUsXmz+IQfa9NkGEq3gA/qQ3mOEqBU6o=
+github.com/cjoudrey/gluahttp v0.0.0-20201111170219-25003d9adfa9/go.mod h1:X97UjDTXp+7bayQSFZk2hPvCTmTZIicUjZQRtkwgAKY=
 github.com/coreos/go-systemd/v22 v22.3.3-0.20220203105225-a9a7ef127534/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc=
 github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=

pkg/extension/luahost/pool.go

@@ -1,8 +1,10 @@
 package luahost
 
 import (
+	"net/http"
 	"sync"
 
+	"github.com/cjoudrey/gluahttp"
 	lua "github.com/yuin/gopher-lua"
 )
 
@@ -24,6 +26,9 @@ func newStatePool(funcProto *lua.FunctionProto) *statePool {
 func (lp *statePool) newState() (*lua.LState, error) {
 	ls := lua.NewState()
 
+	// Load supplemental native modules.
+	ls.PreloadModule("http", gluahttp.NewHttpModule(&http.Client{}).Loader)
+
 	// Setup channels.
 	for name, ch := range lp.channels {
 		ls.SetGlobal(name, lua.LChannel(ch))