Solved

Waiting for entire file to appear before execution

Posted on 2011-03-02
3
304 Views
Last Modified: 2012-05-11
Hello,
I'm trying to wait until an application is downloaded before executing it. Unfortunately, I'm having problems because it will execute the file before the application is fully downloaded.

here's my current code:

char cpath[MAX_PATH];
	GetCurrentDirectory(MAX_PATH, cpath);
	HANDLE  m_hDir = FindFirstChangeNotification(cpath, FALSE, FILE_NOTIFY_CHANGE_FILE_NAME);
WaitForSingleObject(m_hDir, INFINITE);

			Sleep(4000);

			WinExec("app.exe", SW_SHOW);
			

Open in new window


As you can see, I'm forced to use Sleep() to give it enough time to fully download, but I'd like a more reliable way of doing this. I thought of checking for the full size of the desired file before execution, but the file being downloaded may vary in size a great deal, so that wouldn't be sensible either.

Any input would be helpful


Thanks.
0
Comment
Question by:JoeD77
3 Comments
 
LVL 86

Accepted Solution

by:
jkr earned 500 total points
ID: 35020384
How are you downloading the file? Waiting for that operation to finish seems to be the better way to approach this issue, e.g.
URLDownloadToFile(NULL,"http://www.example.org/path/app.exe","app.exe",0,NULL);

WinExec("app.exe", SW_SHOW);

Open in new window

0
 
LVL 33

Expert Comment

by:sarabande
ID: 35026510
you could try to open the exe file exclusively. if that works the file is closed.

another idea is to download the file using a different name  (or extension) if you have control of the download process. then wait on change file name notification.

Sara
0
 
LVL 11

Expert Comment

by:DeepuAbrahamK
ID: 35029482
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Many modern programming languages support the concept of a property -- a class member that combines characteristics of both a data member and a method.  These are sometimes called "smart fields" because you can add logic that is applied automaticall…
Basic understanding on "OO- Object Orientation" is needed for designing a logical solution to solve a problem. Basic OOAD is a prerequisite for a coder to ensure that they follow the basic design of OO. This would help developers to understand the b…
The viewer will learn additional member functions of the vector class. Specifically, the capacity and swap member functions will be introduced.
The viewer will learn how to clear a vector as well as how to detect empty vectors in C++.

911 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

16 Experts available now in Live!

Get 1:1 Help Now