第一步，谷歌有文章说CHtmlView部分api使用BSTR没释放：
解决方法是重写一下接口：
CString GetFullName() const; CString GetFullName() const; CString GetType() const; CString GetLocationName() const; CString GetLocationURL() const; void Navigate(LPCTSTR URL, DWORD dwFlags = 0, LPCTSTR lpszTargetFrameName = NULL, LPCTSTR lpszHeaders = NULL, LPVOID lpvPostData = NULL, DWORD dwPostDataLen = 0); BOOL LoadFromResource(LPCTSTR lpszResource); BOOL LoadFromResource(UINT nRes);
CString CHtmlViewEx::GetFullName() const
{
ASSERT(m_pBrowserApp != NULL);
BSTR bstr;
m_pBrowserApp->get_FullName(&bstr);
CString retVal(bstr);
SysFreeString(bstr); // Added this line to prevent leak.
return retVal;
}
CString CHtmlViewEx::GetType() const
{
ASSERT(m_pBrowserApp != NULL);
BSTR bstr;
m_pBrowserApp->get_Type(&bstr);
CString retVal(bstr);
SysFreeString(bstr); // Added this line to prevent leak.
return retVal;
}
CString CHtmlViewEx::GetLocationName() const
{
ASSERT(m_pBrowserApp != NULL);
BSTR bstr;
m_pBrowserApp->get_LocationName(&bstr);
CString retVal(bstr);
SysFreeString(bstr); // Added this line to prevent leak.
return retVal;
}
CString CHtmlViewEx::GetLocationURL() const
{
ASSERT(m_pBrowserApp != NULL);
BSTR bstr;
m_pBrowserApp->get_LocationURL(&bstr);
CString retVal(bstr);
SysFreeString(bstr); // Added this line to prevent leak.
return retVal;
}
void CHtmlViewEx::Navigate(LPCTSTR lpszURL, DWORD dwFlags /*= 0*/, LPCTSTR lpszTargetFrameName /*= NULL*/, LPCTSTR lpszHeaders /*= NULL*/, LPVOID lpvPostData /*= NULL*/, DWORD dwPostDataLen /*= 0*/)
{
CString strURL(lpszURL);
BSTR bstrURL = strURL.AllocSysString();
COleSafeArray vPostData;
if (lpvPostData != NULL)
{
if (dwPostDataLen == 0)
dwPostDataLen = lstrlen((LPCTSTR)lpvPostData);
vPostData.CreateOneDim(VT_UI1, dwPostDataLen, lpvPostData);
}
m_pBrowserApp->Navigate(bstrURL, COleVariant((long)dwFlags, VT_I4), COleVariant(lpszTargetFrameName, VT_BSTR),
vPostData, COleVariant(lpszHeaders, VT_BSTR));
SysFreeString(bstrURL); // Added this line to prevent leak.
}
BOOL CHtmlViewEx::LoadFromResource(LPCTSTR lpszResource)
{
HINSTANCE hInstance = AfxGetResourceHandle();
ASSERT(hInstance != NULL);
CString strResourceURL;
BOOL bRetVal = TRUE;
LPTSTR lpszModule = new TCHAR[_MAX_PATH];
if (GetModuleFileName(hInstance, lpszModule, _MAX_PATH))
{
strResourceURL.Format(_T("res://%s/%s"), lpszModule, lpszResource);
Navigate(strResourceURL, 0, 0, 0);
}
else
bRetVal = FALSE;
delete[] lpszModule;
return bRetVal;
}
BOOL CHtmlViewEx::LoadFromResource(UINT nRes)
{
HINSTANCE hInstance = AfxGetResourceHandle();
ASSERT(hInstance != NULL);
CString strResourceURL;
BOOL bRetVal = TRUE;
LPTSTR lpszModule = new TCHAR[_MAX_PATH];
if (GetModuleFileName(hInstance, lpszModule, _MAX_PATH))
{
strResourceURL.Format(_T("res://%s/%d"), lpszModule, nRes);
Navigate(strResourceURL, 0, 0, 0);
}
else
bRetVal = FALSE;
delete[] lpszModule;
return bRetVal;
}
第二步，由于加载页面js脚本并没有释放js变量所分配的内存，有两种解决方法：第一种，调用本地html文件，调用CollectGarbage()接口回收变量的内存，html文件代码如下：
<!DOCTYPE html>
<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body>
<script type="text/javascript">
if (typeof window.CollectGarbage === ‘function‘) {
CollectGarbage()
}
</script>
</body>
</html>
第二种：如果不需要调用html页面的js代码，可以直接关闭IE浏览器的js脚本功能：https://jingyan.baidu.com/article/48206aead44e53216ad6b397.html
转载请注明出处，from博客园hemjohn
原文地址：https://www.cnblogs.com/HemJohn/p/10901681.html
时间： 2024-07-30 20:51:29