feat: support ext_auth wasmplugin (#1103)

plugins/wasm-go/extensions/ext-auth/utils.go

@@ -0,0 +1,38 @@
+package main
+
+import (
+	"github.com/higress-group/proxy-wasm-go-sdk/proxywasm"
+	"net/http"
+	"sort"
+	"strings"
+)
+
+func sendResponse(statusCode uint32, statusCodeDetailData string, headers http.Header) error {
+	return proxywasm.SendHttpResponseWithDetail(statusCode, statusCodeDetailData, reconvertHeaders(headers), nil, -1)
+}
+
+func reconvertHeaders(headers http.Header) [][2]string {
+	var ret [][2]string
+	if headers == nil {
+		return ret
+	}
+	for k, vs := range headers {
+		for _, v := range vs {
+			ret = append(ret, [2]string{k, v})
+		}
+	}
+	sort.SliceStable(ret, func(i, j int) bool {
+		return ret[i][0] < ret[j][0]
+	})
+	return ret
+}
+
+func extractFromHeader(headers [][2]string, headerKey string) string {
+	for _, header := range headers {
+		key := header[0]
+		if strings.ToLower(key) == headerKey {
+			return strings.TrimSpace(header[1])
+		}
+	}
+	return ""
+}