实现WAF

internal/waf/checkpoints/request_json_arg.go

@@ -0,0 +1,44 @@
+package checkpoints
+
+import (
+	"encoding/json"
+	"github.com/TeaOSLab/EdgeNode/internal/utils"
+	"github.com/TeaOSLab/EdgeNode/internal/waf/requests"
+	"strings"
+)
+
+// ${requestJSON.arg}
+type RequestJSONArgCheckpoint struct {
+	Checkpoint
+}
+
+func (this *RequestJSONArgCheckpoint) RequestValue(req *requests.Request, param string, options map[string]interface{}) (value interface{}, sysErr error, userErr error) {
+	if len(req.BodyData) == 0 {
+		data, err := req.ReadBody(int64(32 * 1024 * 1024)) // read 32m bytes
+		if err != nil {
+			return "", err, nil
+		}
+		req.BodyData = data
+		defer req.RestoreBody(data)
+	}
+
+	// TODO improve performance
+	var m interface{} = nil
+	err := json.Unmarshal(req.BodyData, &m)
+	if err != nil || m == nil {
+		return "", nil, err
+	}
+
+	value = utils.Get(m, strings.Split(param, "."))
+	if value != nil {
+		return value, nil, err
+	}
+	return "", nil, nil
+}
+
+func (this *RequestJSONArgCheckpoint) ResponseValue(req *requests.Request, resp *requests.Response, param string, options map[string]interface{}) (value interface{}, sysErr error, userErr error) {
+	if this.IsRequest() {
+		return this.RequestValue(req, param, options)
+	}
+	return
+}