feat(miniapp): 小程序订阅消息

1. 用户订阅消息服务端回调处理
2. 用户订阅消息订阅通知事件推送

miniprogram/server/util.go

@@ -0,0 +1,29 @@
+package server
+
+import "net/http"
+
+var textContentType = []string{"text/plain; charset=utf-8"}
+
+//Set http response Content-Type
+func setContentType(w http.ResponseWriter, value []string) {
+	header := w.Header()
+	if val := header["Content-Type"]; len(val) == 0 {
+		header["Content-Type"] = value
+	}
+}
+
+// Query 查询 URL query string
+func (srv *Server) Query(key string) string {
+	req := srv.Request
+	return req.URL.Query().Get(key)
+}
+
+// SetResponseWrite 设置回调返回值
+func (srv *Server) SetResponseWrite(str string) {
+	setContentType(srv.Write, textContentType)
+	srv.Write.WriteHeader(http.StatusOK)
+	_, err := srv.Write.Write([]byte(str))
+	if err != nil {
+		panic(err)
+	}
+}