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lua.go
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lua.go
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package resolvers
import (
"github.com/yuin/gopher-lua"
"net/url"
"net/http"
. "github.com/nebtex/menshend/pkg/utils"
vault "github.com/hashicorp/vault/api"
"github.com/cjoudrey/gluahttp"
luajson "layeh.com/gopher-json"
"github.com/yuin/gluamapper"
"fmt"
st "layeh.com/gopher-luar"
)
type LuaResolver struct {
Content string `json:"content"`
Request map[string]string `json:"-"`
MakeBodyAvailable bool `json:"makeBodyAvailable"`
}
func (lr *LuaResolver) SetRequest(method string, body string) {
lr.Request = map[string]string{}
lr.Request["Method"] = method
lr.Request["Body"] = body
}
func (lr *LuaResolver)NeedBody() bool {
return lr.MakeBodyAvailable
}
func (lr *LuaResolver)Resolve(v *vault.Secret) (Backend) {
script := lr.Content
script += "\nreturnBackend(getBackend(TokenInfo, Request))"
l := lua.NewState()
lua.OpenBase(l)
lua.OpenString(l)
lua.OpenTable(l)
lua.OpenMath(l)
lua.OpenOs(l)
lua.OpenIo(l)
lua.OpenPackage(l)
l.PreloadModule("http", gluahttp.NewHttpModule(&http.Client{}).Loader)
luajson.Preload(l)
l.SetGlobal("TokenInfo", st.New(l, v))
l.SetGlobal("Request", st.New(l, lr.Request))
ret := &SimpleBackend{}
ret.ys = &backendValues{}
returnBackend := func(L *lua.LState) int {
table := L.ToTable(1)
err := gluamapper.Map(table, ret.ys)
HttpCheckPanic(err, InternalError)
return 0 // Notify that we pushed 0 value to the stack
}
l.SetGlobal("returnBackend", l.NewFunction(returnBackend))
err := l.DoString(script)
HttpCheckPanic(err, InternalError.WithValue("script", script))
_, parseErr := url.ParseRequestURI(ret.ys.BaseUrl)
HttpCheckPanic(parseErr, InternalError.WithValue("script", lr.Content).WithValue("backend", fmt.Sprintf("%v", ret)))
return ret
}