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Qt 4.8.4 how to check if file exists on http server

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need to check the if file exists on http server, i have the full path and when i try it via browser all works but when i try in code to do : if(QFile::exists("http://www.foo.com/hidden/Support/myapp_1.1.2_installer.exe" ))     {         qDebug("file exists");         return true;     }     else     {         qDebug("file not exists");     } as it writen here : Your text to link here… [qtcentre.org] it allways returns me false no matter what .. what im doing wrong and is it the right way to do this ?

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