download a file with URLDownloadToFile

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sberk

16

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Joined: 6th Jun 2010

Location: next to a cup of coffee

Posted: 31st May 2011 12:27

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Hi,
I'm using URLDownloadToFile to download a file. The point that this downloading happens in the background, while the main loop runs unaffected, is a point I really enjoy about this function.
However, I have some problems to determine wether the download is finished. The return code obviousluy only indicates whether the download is started.
Can anybody give me clue what\'s the best way to determine whether the download is finished?
yours
sberK

+ Code Snippet

function download(from$,to$)
   if file exist(to$) then delete file to$
   load dll "urlmon",1
   LOAD DLL "wininet",2
   failed_delete_cache = CALL DLL(2,"DeleteUrlCacheEntryA", from$)
   failed=CALL DLL(1,"URLDownloadToFileA",0,from$,to$,0,0)
   delete dll 2
   delete dll 1
endfunction faile

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Hodgey

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Joined: 10th Oct 2009

Location: Australia

Posted: 31st May 2011 12:38

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I don't know much about this sort of thing but it appears that you have a typo in your function. You have "endfunction faile", is it supposed to be endfunction failed?

A clever person solves a problem, a wise person avoids it - Albert Einstein

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sberk

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Posted: 31st May 2011 13:13

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Thanks,
yes this is a typo. I just c&p it from my source code and missed the last bit. Thank you very much.
sberK

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Neuro Fuzzy

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Posted: 2nd Jun 2011 04:48 Edited at: 2nd Jun 2011 04:48

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I took a look at this, and I can't be of much help, but I'll leave the windows docs here, in case they help.

Tell me if there's a broken link to images in a thread I post, and I'll fix 'em.

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SH4773R

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Joined: 18th Jan 2010

Location: AMERICA!!!

Posted: 2nd Jun 2011 06:43 Edited at: 2nd Jun 2011 06:45

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Quote: "It should be noted that this function requires you have already called CoInitializeEx() in your program or it will fail to operate. In my case, it didn't return any error codes it just hung up the program indefinitely until I included this explicit COM initalization step."

Does this mean anything to you guys?
It seems the .dll is dependant on other commands.

Also whats wrong with FTP?

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Wyldhunt

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Joined: 27th Sep 2009

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Posted: 5th Jun 2011 11:36 Edited at: 5th Jun 2011 11:40

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You may be able to run the following function in your main loop after you run your download function. Assuming that it doesn't create a file with the proper name immediately upon the start of the download (If it downloads to a temp directory/file in the background), then this would work. I don't know enough about the specific functions to help more than basic brainstorming though. Sorry.

+ Code Snippet

function download(to$)
   complete = file exist(to$)
endfunction complete

EDIT:
For FTP stuff, you may also want to look at this DLL:
http://forum.thegamecreators.com/?m=forum_view&t=185283&b=1

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Rudolpho

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Joined: 28th Dec 2005

Location: Sweden

Posted: 5th Jun 2011 20:08

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@Wyldhunt: the file will probably be created at the beginning of the download and then appended until the transfer is complete.

If you don't mind using a plugin, I threw together this which should solve the problem (it also allows you to query the current download progress, with which you could update a bar or something to show the player / user that your application hasn't frozen