refactor: migrate MCP SDK to main repo (#3516)

plugins/wasm-go/pkg/mcp/utils/session.go

@@ -0,0 +1,51 @@
+// Copyright (c) 2022 Alibaba Group Holding Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package utils
+
+import (
+	"net/url"
+
+	"github.com/higress-group/proxy-wasm-go-sdk/proxywasm"
+
+	"github.com/higress-group/wasm-go/pkg/log"
+	"github.com/higress-group/wasm-go/pkg/wrapper"
+)
+
+func IsStatefulSession(ctx wrapper.HttpContext) bool {
+	parse, err := url.Parse(ctx.Path())
+	if err != nil {
+		log.Errorf("failed to parse request path: %v", err)
+		return false
+	}
+	query, err := url.ParseQuery(parse.RawQuery)
+	if err != nil {
+		log.Errorf("failed to parse query params: %v", err)
+		return false
+	}
+	// Protocol version: 2024-11-05
+	if query.Get("sessionId") != "" {
+		return true
+	}
+	// Protocol version: 2025-03-26
+	sessionHeader, err := proxywasm.GetHttpRequestHeader("mcp-session-id")
+	if err != nil {
+		log.Errorf("failed to get request header: %v", err)
+		return false
+	}
+	if sessionHeader != "" {
+		return true
+	}
+	return false
+}