add ParseJson method

go.mod

@@ -5,6 +5,8 @@ go 1.12
 require (
 	github.com/PuerkitoBio/goquery v1.5.1
 	github.com/go-resty/resty/v2 v2.2.0
+	github.com/tidwall/gjson v1.6.0
+	github.com/tidwall/pretty v1.0.1 // indirect
 	github.com/yuin/gopher-lua v0.0.0-20191220021717-ab39c6098bdb
 	golang.org/x/crypto v0.0.0-20200302210943-78000ba7a073 // indirect
 	golang.org/x/net v0.0.0-20200301022130-244492dfa37a // indirect

go.sum

@@ -7,6 +7,14 @@ github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5P
 github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU=
 github.com/go-resty/resty/v2 v2.2.0 h1:vgZ1cdblp8Aw4jZj3ZsKh6yKAlMg3CHMrqFSFFd+jgY=
 github.com/go-resty/resty/v2 v2.2.0/go.mod h1:nYW/8rxqQCmI3bPz9Fsmjbr2FBjGuR2Mzt6kDh3zZ7w=
+github.com/tidwall/gjson v1.6.0 h1:9VEQWz6LLMUsUl6PueE49ir4Ka6CzLymOAZDxpFsTDc=
+github.com/tidwall/gjson v1.6.0/go.mod h1:P256ACg0Mn+j1RXIDXoss50DeIABTYK1PULOJHhxOls=
+github.com/tidwall/match v1.0.1 h1:PnKP62LPNxHKTwvHHZZzdOAOCtsJTjo6dZLCwpKm5xc=
+github.com/tidwall/match v1.0.1/go.mod h1:LujAq0jyVjBy028G1WhWfIzbpQfMO8bBZ6Tyb0+pL9E=
+github.com/tidwall/pretty v1.0.0 h1:HsD+QiTn7sK6flMKIvNmpqz1qrpP3Ps6jOKIKMooyg4=
+github.com/tidwall/pretty v1.0.0/go.mod h1:XNkn88O1ChpSDQmQeStsy+sBenx6DDtFZJxhVysOjyk=
+github.com/tidwall/pretty v1.0.1 h1:WE4RBSZ1x6McVVC8S/Md+Qse8YUv6HRObAx6ke00NY8=
+github.com/tidwall/pretty v1.0.1/go.mod h1:XNkn88O1ChpSDQmQeStsy+sBenx6DDtFZJxhVysOjyk=
 github.com/yuin/gopher-lua v0.0.0-20190206043414-8bfc7677f583/go.mod h1:gqRgreBUhTSL0GeU64rtZ3Uq3wtjOa/TB2YfrtkCbVQ=
 github.com/yuin/gopher-lua v0.0.0-20191220021717-ab39c6098bdb h1:ZkM6LRnq40pR1Ox0hTHlnpkcOTuFIDQpZ1IN8rKKhX0=
 github.com/yuin/gopher-lua v0.0.0-20191220021717-ab39c6098bdb/go.mod h1:gqRgreBUhTSL0GeU64rtZ3Uq3wtjOa/TB2YfrtkCbVQ=

spider.go

@@ -6,6 +6,7 @@ import (
 
 	"github.com/PuerkitoBio/goquery"
 	"github.com/go-resty/resty/v2"
+	"github.com/tidwall/gjson"
 	"github.com/yuin/gopher-lua"
 	"layeh.com/gopher-luar"
 )
@@ -89,6 +90,15 @@ func (s *Spider) Regexp(l *lua.LState) int {
 	return 1
 }
 
+// ParseJson
+func (s *Spider) ParseJson(l *lua.LState) int {
+	r := gjson.Parse(l.CheckString(1))
+
+	l.Push(luar.New(l, r))
+
+	return 1
+}
+
 // Loader Loader
 func (s *Spider) Loader(l *lua.LState) int {
 	// register functions to the table
@@ -97,6 +107,7 @@ func (s *Spider) Loader(l *lua.LState) int {
 		"NewDocumentFromString": s.NewDocumentFromString,
 		"Get":                   s.Get,
 		"Regexp":                s.Regexp,
+		"ParseJson":             s.ParseJson,
 	})
 
 	// returns the module