// Visit all cookies on the IO thread. The returned cookies are ordered by
  // longest path, then by earliest creation date. Returns false if cookies
  // cannot be accessed.
  ///
  /*--cef()--*/
  virtual bool VisitAllCookies(CefRefPtr<CefCookieVisitor> visitor) =0;

  ///
  // Visit a subset of cookies on the IO thread. The results are filtered by the
  // given url scheme, host, domain and path. If |includeHttpOnly| is true
  // HTTP-only cookies will also be included in the results. The returned
  // cookies are ordered by longest path, then by earliest creation date.
  // Returns false if cookies cannot be accessed.
  ///
  /*--cef()--*/
  virtual bool VisitUrlCookies(const CefString& url,
                               bool includeHttpOnly,
                               CefRefPtr<CefCookieVisitor> visitor) =0;

 1 class CefCookieVisitor : public virtual CefBase {
 2  public:
 3   ///
 4   // Method that will be called once for each cookie. |count| is the 0-based
 5   // index for the current cookie. |total| is the total number of cookies.
 6   // Set |deleteCookie| to true to delete the cookie currently being visited.
 7   // Return false to stop visiting cookies. This method may never be called if
 8   // no cookies are found.
 9   ///
10   /*--cef()--*/
11   virtual bool Visit(const CefCookie& cookie, int count, int total,
12                      bool& deleteCookie) =0;
13 };

class CCookieVisitor : public CefCookieVisitor
{
public:
    CCookieVisitor() {};
    ~CCookieVisitor() {};

    bool Visit(const CefCookie& cookie, int count, int total,
        bool& deleteCookie);
    //这是一个宏 
    //所有的框架类从CefBase继承，实例指针由CefRefPtr管理，CefRefPtr通过调用AddRef()和Release()方法自动管理引用计数。
    IMPLEMENT_REFCOUNTING(CookieVisitor);
};        

//作为类的成员变量
CefRefPtr<CCookieVisitor> m_CookieVisitor;
m_CookieVisitor(new CCookieVisitor());

　//以下代码执行 即回调Visit

　CefRefPtr<CefCookieManager> cefCookieManager = CefCookieManager::GetGlobalManager(nullptr);

  if (cefCookieManager)
  {
  　　cefCookieManager->VisitUrlCookies(url ,true , m_visitor);
  }

 1 bool CookieVisitor::Visit(const CefCookie & cookie, int count, int total, bool & deleteCookie)
 2 {
 3     if (count == total)
 4     {
 5         return false;
 6     }
 7     if (cookie.name.str && cookie.value.str)
 8     {
 9         string strName = cookie.name.str;
10         string strValue =http://www.mamicode.com/ cookie.value.str;
11     }
12     return true;
13 }