[WAF]增加若干个编解码方法

pkg/serverconfigs/filterconfigs/filter_html_escape.go

@@ -0,0 +1,20 @@
+package filterconfigs
+
+import (
+	"github.com/iwind/TeaGo/types"
+	"html"
+)
+
+type HTMLEscapeFilter struct {
+}
+
+// 初始化
+func (this *HTMLEscapeFilter) Init() error {
+	return nil
+}
+
+// 执行过滤
+func (this *HTMLEscapeFilter) Do(input interface{}, options interface{}) (output interface{}, goNext bool, err error) {
+	s := types.String(input)
+	return html.EscapeString(s), true, nil
+}

pkg/serverconfigs/filterconfigs/filter_html_escape_test.go

@@ -0,0 +1,9 @@
+package filterconfigs
+
+import "testing"
+
+func TestHTMLEscapeFilter_Do(t *testing.T) {
+	filter := &HTMLEscapeFilter{}
+	t.Log(filter.Do("Hello", nil))
+	t.Log(filter.Do("<script></script>", nil))
+}

pkg/serverconfigs/filterconfigs/filter_html_unescape.go

@@ -0,0 +1,20 @@
+package filterconfigs
+
+import (
+	"github.com/iwind/TeaGo/types"
+	"html"
+)
+
+type HTMLUnescapeFilter struct {
+}
+
+// 初始化
+func (this *HTMLUnescapeFilter) Init() error {
+	return nil
+}
+
+// 执行过滤
+func (this *HTMLUnescapeFilter) Do(input interface{}, options interface{}) (output interface{}, goNext bool, err error) {
+	s := types.String(input)
+	return html.UnescapeString(s), true, nil
+}

pkg/serverconfigs/filterconfigs/filter_html_unescape_test.go

@@ -0,0 +1,10 @@
+package filterconfigs
+
+import "testing"
+
+func TestHTMLUnescapeFilter_Do(t *testing.T) {
+	filter := &HTMLUnescapeFilter{}
+	t.Log(filter.Do("Hello", nil))
+	t.Log(filter.Do("<script>", nil))
+	t.Log(filter.Do("<script>", nil))
+}

pkg/serverconfigs/filterconfigs/filter_unicode_decode.go

@@ -0,0 +1,25 @@
+package filterconfigs
+
+import (
+	"github.com/iwind/TeaGo/types"
+	"strconv"
+	"strings"
+)
+
+type UnicodeDecodeFilter struct {
+}
+
+// 初始化
+func (this *UnicodeDecodeFilter) Init() error {
+	return nil
+}
+
+// 执行过滤
+func (this *UnicodeDecodeFilter) Do(input interface{}, options interface{}) (output interface{}, goNext bool, err error) {
+	s := types.String(input)
+	result, err := strconv.Unquote("\"" + strings.ReplaceAll(s, "\"", "\\\"") + "\"")
+	if err != nil {
+		return input, true, nil
+	}
+	return result, true, nil
+}

pkg/serverconfigs/filterconfigs/filter_unicode_decode_test.go

@@ -0,0 +1,10 @@
+package filterconfigs
+
+import "testing"
+
+func TestUnicodeDecodeFilter_Do(t *testing.T) {
+	filter := &UnicodeDecodeFilter{}
+	t.Log(filter.Do(`"\u5947\u5c4f`, nil))
+	t.Log(filter.Do(`"Hello`, nil))
+	t.Log(filter.Do(`真实的存在`, nil))
+}

pkg/serverconfigs/filterconfigs/filter_unicode_encode.go

@@ -0,0 +1,29 @@
+package filterconfigs
+
+import (
+	"github.com/iwind/TeaGo/types"
+	"strconv"
+	"strings"
+)
+
+type UnicodeEncodeFilter struct {
+}
+
+// 初始化
+func (this *UnicodeEncodeFilter) Init() error {
+	return nil
+}
+
+// 执行过滤
+func (this *UnicodeEncodeFilter) Do(input interface{}, options interface{}) (output interface{}, goNext bool, err error) {
+	s := []rune(types.String(input))
+	result := strings.Builder{}
+	for _, r := range s {
+		if r < 128 {
+			result.WriteRune(r)
+		} else {
+			result.WriteString("\\u" + strconv.FormatInt(int64(r), 16))
+		}
+	}
+	return result.String(), true, nil
+}

pkg/serverconfigs/filterconfigs/filter_unicode_encode_test.go

@@ -0,0 +1,11 @@
+package filterconfigs
+
+import "testing"
+
+func TestUnicodeEncodeFilter_Do(t *testing.T) {
+	filter := &UnicodeEncodeFilter{}
+	t.Log(filter.Do("Hello", nil))
+	t.Log(filter.Do("我是中文", nil))
+	t.Log(filter.Do("我是中文和英文Mixed", nil))
+	t.Log(filter.Do("我有特殊字符|'\"", nil))
+}

pkg/serverconfigs/filterconfigs/filters.go

@@ -18,6 +18,10 @@ var allFilters = map[string]FilterInterface{
 	"urlDecode":     new(URLDecodeFilter),
 	"base64Encode":  new(Base64EncodeFilter),
 	"base64Decode":  new(Base64DecodeFilter),
+	"unicodeEncode": new(UnicodeEncodeFilter),
+	"unicodeDecode": new(UnicodeDecodeFilter),
+	"htmlEscape":    new(HTMLEscapeFilter),
+	"htmlUnescape":  new(HTMLUnescapeFilter),
 	"length":        new(LengthFilter),
 	"hex2dec":       new(Hex2DecFilter),
 	"dec2hex":       new(Dec2HexFilter),