CEF3 获取Cookie例子 CefCookieManager C++

简介

Chromium Embedded Framework (CEF)是由 Marshall Greenblatt 在2008年创办的开源项目，致力于基于Google Chromium项目开发一个Web控件。 CEF目前已支持多种编程语言和操作系统，能方便地集成到现有或者新的应用程序中，设计上，它追求高性能的同时，也追求易于使用，它的基本框架通过原生库提供C和C++的编程接口，这些接口将宿主程序与Chromium与WebKit的实现细节隔离，能让浏览器与应用程序无缝集成，并支持自定义插件、协议、Javascript对象与扩展。宿主程序还能根据需要控制资源加载、页面跳转、上下文菜单、打印等等。这些好处都是在支持Google Chrome同等效率与HTML5技术可用的基本上提供的。现在很多主流的客户端都使用了CEF来显示Web页面：网易云音乐、QQ、豌豆荚等（安装目录下可以找到libcef.dll）。

正文

首先从cef_cookie.h 源码中看到CefCookieManager 这个类：

  // 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 };

可以通过VisitAllCookies获取所有cookies；VisitUrlCookies获取域名下的所有cookies。

看到VisitUrlCookies的参数是CefCookieVisitor；所以实现一个类用于回调读取cookies；

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);
  }

回调进行读取，count为当前cookie total为总数。具体看CefCookieVisitor的注释，接下来便可以Visit读取到数据

 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 = cookie.value.str;
11     }
12     return true;
13 }

备注：CEF远程调试地址 chrome://inspect/#devices

结束！