1 files changed, 91 insertions, 0 deletions
diff --git a/pkg/api/handlers/decoder.go b/pkg/api/handlers/decoder.go
new file mode 100644
index 000000000..890d77ecc
--- /dev/null
+++ b/pkg/api/handlers/decoder.go
@@ -0,0 +1,91 @@
+package handlers
+
+import (
+	"encoding/json"
+	"reflect"
+	"time"
+
+	"github.com/gorilla/schema"
+	"github.com/sirupsen/logrus"
+)
+
+// NewAPIDecoder returns a configured schema.Decoder
+func NewAPIDecoder() *schema.Decoder {
+	_ = ParseDateTime
+
+	d := schema.NewDecoder()
+	d.IgnoreUnknownKeys(true)
+	d.RegisterConverter(map[string][]string{}, convertUrlValuesString)
+	d.RegisterConverter(time.Time{}, convertTimeString)
+	return d
+}
+
+// On client:
+// 	v := map[string][]string{
+//		"dangling": {"true"},
+//	}
+//
+//	payload, err := jsoniter.MarshalToString(v)
+//	if err != nil {
+//		panic(err)
+//	}
+//	payload = url.QueryEscape(payload)
+func convertUrlValuesString(query string) reflect.Value {
+	f := map[string][]string{}
+
+	err := json.Unmarshal([]byte(query), &f)
+	if err != nil {
+		logrus.Infof("convertUrlValuesString: Failed to Unmarshal %s: %s", query, err.Error())
+	}
+
+	return reflect.ValueOf(f)
+}
+
+// isZero() can be used to determine if parsing failed.
+func convertTimeString(query string) reflect.Value {
+	var (
+		err error
+		t   time.Time
+	)
+
+	for _, f := range []string{
+		time.UnixDate,
+		time.ANSIC,
+		time.RFC1123,
+		time.RFC1123Z,
+		time.RFC3339,
+		time.RFC3339Nano,
+		time.RFC822,
+		time.RFC822Z,
+		time.RFC850,
+		time.RubyDate,
+		time.Stamp,
+		time.StampMicro,
+		time.StampMilli,
+		time.StampNano,
+	} {
+		t, err = time.Parse(f, query)
+		if err == nil {
+			return reflect.ValueOf(t)
+		}
+
+		if _, isParseError := err.(*time.ParseError); isParseError {
+			// Try next format
+			continue
+		} else {
+			break
+		}
+	}
+
+	// We've exhausted all formats, or something bad happened
+	if err != nil {
+		logrus.Infof("convertTimeString: Failed to parse %s: %s", query, err.Error())
+	}
+	return reflect.ValueOf(time.Time{})
+}
+
+// ParseDateTime is a helper function to aid in parsing different Time/Date formats
+// isZero() can be used to determine if parsing failed.
+func ParseDateTime(query string) time.Time {
+	return convertTimeString(query).Interface().(time.Time)
+}