feat: Add traffic-editor plugin (#2825)

plugins/wasm-go/extensions/traffic-editor/http.go

@@ -0,0 +1,22 @@
+package main
+
+import "strings"
+
+func headerSlice2Map(headerSlice [][2]string) map[string][]string {
+	headerMap := make(map[string][]string)
+	for _, header := range headerSlice {
+		k, v := strings.ToLower(header[0]), header[1]
+		headerMap[k] = append(headerMap[k], v)
+	}
+	return headerMap
+}
+
+func headerMap2Slice(headerMap map[string][]string) [][2]string {
+	headerSlice := make([][2]string, 0, len(headerMap))
+	for k, vs := range headerMap {
+		for _, v := range vs {
+			headerSlice = append(headerSlice, [2]string{k, v})
+		}
+	}
+	return headerSlice
+}