s3 minio, cos, oss support

pkg/common/db/s3/oss/sort.go

@@ -0,0 +1,47 @@
+package oss
+
+import (
+	"bytes"
+	"sort"
+)
+
+// headerSorter defines the key-value structure for storing the sorted data in signHeader.
+type headerSorter struct {
+	Keys []string
+	Vals []string
+}
+
+// newHeaderSorter is an additional function for function SignHeader.
+func newHeaderSorter(m map[string]string) *headerSorter {
+	hs := &headerSorter{
+		Keys: make([]string, 0, len(m)),
+		Vals: make([]string, 0, len(m)),
+	}
+
+	for k, v := range m {
+		hs.Keys = append(hs.Keys, k)
+		hs.Vals = append(hs.Vals, v)
+	}
+	return hs
+}
+
+// Sort is an additional function for function SignHeader.
+func (hs *headerSorter) Sort() {
+	sort.Sort(hs)
+}
+
+// Len is an additional function for function SignHeader.
+func (hs *headerSorter) Len() int {
+	return len(hs.Vals)
+}
+
+// Less is an additional function for function SignHeader.
+func (hs *headerSorter) Less(i, j int) bool {
+	return bytes.Compare([]byte(hs.Keys[i]), []byte(hs.Keys[j])) < 0
+}
+
+// Swap is an additional function for function SignHeader.
+func (hs *headerSorter) Swap(i, j int) {
+	hs.Vals[i], hs.Vals[j] = hs.Vals[j], hs.Vals[i]
+	hs.Keys[i], hs.Keys[j] = hs.Keys[j], hs.Keys[i]
+}