diff --git a/go.mod b/go.mod
index 0b51228..98b77e2 100644
--- a/go.mod
+++ b/go.mod
@@ -7,6 +7,11 @@ require (
 	github.com/wadey/go-rounding v1.1.0
 )
 
+require (
+	github.com/gabriel-vasile/mimetype v1.4.2 // indirect
+	golang.org/x/net v0.8.0 // indirect
+)
+
 require (
 	github.com/jwalton/go-supportscolor v1.1.0
 	github.com/mattn/go-colorable v0.1.13 // indirect
diff --git a/go.sum b/go.sum
index 90925f9..feabdf9 100644
--- a/go.sum
+++ b/go.sum
@@ -1,5 +1,7 @@
 github.com/fatih/color v1.14.1 h1:qfhVLaG5s+nCROl1zJsZRxFeYrHLqWroPOQ8BWiNb4w=
 github.com/fatih/color v1.14.1/go.mod h1:2oHN61fhTpgcxD3TSWCgKDiH1+x4OiDVVGH8WlgGZGg=
+github.com/gabriel-vasile/mimetype v1.4.2 h1:w5qFW6JKBz9Y393Y4q372O9A7cUSequkh1Q7OhCmWKU=
+github.com/gabriel-vasile/mimetype v1.4.2/go.mod h1:zApsH/mKG4w07erKIaJPFiX0Tsq9BFQgN3qGY5GnNgA=
 github.com/jwalton/go-supportscolor v1.1.0 h1:HsXFJdMPjRUAx8cIW6g30hVSFYaxh9yRQwEWgkAR7lQ=
 github.com/jwalton/go-supportscolor v1.1.0/go.mod h1:hFVUAZV2cWg+WFFC4v8pT2X/S2qUUBYMioBD9AINXGs=
 github.com/mattn/go-colorable v0.1.13 h1:fFA4WZxdEF4tXPZVKMLwD8oUnCTTo08duU7wxecdEvA=
diff --git a/src/file.go b/src/file.go
index ff58052..6e455bc 100644
--- a/src/file.go
+++ b/src/file.go
@@ -5,6 +5,8 @@ import (
 	"fmt"
 	"io"
 	"os"
+
+	"github.com/gabriel-vasile/mimetype"
 )
 
 var ArFile = Map(anymap{
@@ -21,6 +23,15 @@ func readtext(file *os.File) (string, error) {
 	return buf.String(), nil
 }
 
+func readbinary(file *os.File) ([]byte, error) {
+	var buf bytes.Buffer
+	_, err := io.Copy(&buf, file)
+	if err != nil {
+		return nil, err
+	}
+	return buf.Bytes(), nil
+}
+
 func ArRead(args ...any) (any, ArErr) {
 	if len(args) != 1 {
 		return ArObject{}, ArErr{TYPE: "Runtime Error", message: "read takes 1 argument, got " + fmt.Sprint(len(args)), EXISTS: true}
@@ -49,6 +60,24 @@ func ArRead(args ...any) (any, ArErr) {
 			}
 			return jsonparse(text), ArErr{}
 		}},
+		"contentType": builtinFunc{"contentType", func(...any) (any, ArErr) {
+			mimetype, err := mimetype.DetectFile(filename)
+			if err != nil {
+				return ArObject{}, ArErr{TYPE: "Runtime Error", message: err.Error(), EXISTS: true}
+			}
+			return mimetype.String(), ArErr{}
+		}},
+		"bytes": builtinFunc{"bytes", func(...any) (any, ArErr) {
+			bytes, err := readbinary(file)
+			if err != nil {
+				return ArObject{}, ArErr{TYPE: "Runtime Error", message: err.Error(), EXISTS: true}
+			}
+			ArBinary := []any{}
+			for _, b := range bytes {
+				ArBinary = append(ArBinary, newNumber().SetInt64(int64(b)))
+			}
+			return ArBinary, ArErr{}
+		}},
 	}), ArErr{}
 }
 
diff --git a/src/socket.go b/src/socket.go
index 3eedb52..cfbe6c8 100644
--- a/src/socket.go
+++ b/src/socket.go
@@ -108,6 +108,7 @@ func ArSocket(args ...any) (any, ArErr) {
 						"close",
 						func(args ...any) (any, ArErr) {
 							conn.Close()
+							conn = nil
 							return nil, ArErr{}
 						},
 					},
@@ -124,6 +125,7 @@ func ArSocket(args ...any) (any, ArErr) {
 			"close",
 			func(args ...any) (any, ArErr) {
 				ln.Close()
+				ln = nil
 				return nil, ArErr{}
 			},
 		},