Inetget background limitation?

[hawky358]

Maybe this has been mentioned somewhere, I've tried looking but couldn't find anything.

Using Inetget with background = 1 allows you to have multiple downloads at once, but it seems that you can only have 2 actively downloading at a time.

Is this a limitation or a bug?

I've included some example script just to illustrate my point

global $dls[11], $ol

$dls[1] = InetGet("http://www.stevenharrington.com/youandI/assetts/arkitip.gif","1.gif",1,1)
$dls[2] = InetGet("http://www.stevenharrington.com/youandI/assetts/peacock.gif","2.gif",1,1)
$dls[3] = InetGet("http://www.stevenharrington.com/youandI/assetts/Quilt.gif","3.gif",1,1)
$dls[4] = InetGet("http://www.stevenharrington.com/youandI/assetts/smokin_hot.gif","4.gif",1,1)
$dls[5] = InetGet("http://www.stevenharrington.com/youandI/assetts/Music.gif","5.gif",1,1)
$dls[6] = InetGet("http://www.stevenharrington.com/youandI/assetts/incase.gif","6.gif",1,1)
$dls[7] = InetGet("http://www.stevenharrington.com/youandI/assetts/somehow.gif","7.gif",1,1)
$dls[8] = InetGet("http://www.stevenharrington.com/youandI/assetts/book.jpg","8.jpg",1,1)
$dls[9] = InetGet("http://www.stevenharrington.com/youandI/assetts/un_royaume.jpg","9.jpg",1,1)
$dls[10] = InetGet("http://www.stevenharrington.com/youandI/assetts/thank_you.jpg","10.jpg",1,1)

while 1
    $line = ""
    
    for $i = 1 to 10
        $kb = round(InetGetInfo($dls[$i],0)/1000,0)
        if InetGetInfo($dls[$i],2) = TRUE Then
            $kb = "Done"
        EndIf
        
        $line &= $i & ": " & $kb & "  "

    Next
    if $ol <> $line Then
        $ol = $line
        ToolTip($line,300,300)
    EndIf
    
WEnd

You can see only 2 of the downloads are moving at a time

Note:

- The site is just a random site with images I chose

- I just chose images so one can see the download taking place

- This is not the server limiting 2 connections (Running the program multiple times or using a dl manager allows much more than 2 connections)

edit: Code brackets were incorrect

Edited April 29, 2010 by hawky358

[PsaltyDS]

Calls are being made to iexplore, and there are probably limits in IE for how many simultaneous downloads are running (or number of connections to one server, etc.). In Firefox, you could check in about:config for things like network.http.pipelining and related settings.

But I'm not sure how you check such things in IE, or if it even supports it.

[hawky358]

Calls are being made to iexplore, and there are probably limits in IE for how many simultaneous downloads are running (or number of connections to one server, etc.). In Firefox, you could check in about:config for things like network.http.pipelining and related settings.

But I'm not sure how you check such things in IE, or if it even supports it.

Thanks man!

I haven't used IE in such a long time I forgot it had that limitation (Which was always and still is fixed with a simple registry fix)

This is the key in case you are wondering (Autoit uses the IE7 & earlier settings)

Inside

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings

Add Dword Values

MaxConnectionsPer1_0Server
MaxConnectionsPerServer

both these values should be set to decimal 10 (or whichever limit you want)

[PsaltyDS]

Did you test that changing those settings changed the behavior of your InetGet() script?

[hawky358]

Yup it works fine now.

I've tried it with up to 20 connections using InetGet() in a single script. No problem

[jchd]

Nice problem resolution and best knowing.

FYI, there is another (dumb) limitation on TCP connections with XP, which you can raise using this. I don't endorse that thing, but I use it and it works without problems.

[hawky358]

Oh yea, the Halfopen limit.

I used the 4226 patcher

I don't think during normal Autoit scripting you'll have more than 10 Half open connections, but for other purposes maybe

Anyway that's it for this topic

[Zedna]

Please make BugTrac ticket for this

MaxConnectionsPerServer registry hack.

I think this should be mentioned in Autoit's helpfile for InetGet() in Remarks section.

[Valik]

Zedna, should we also mention that if the server limits the number of connections? Should we mention that maybe your router has limitations? Or the modem? Or the ISP? Where do we stop mentioning limitations?

[Zedna]

Zedna, should we also mention that if the server limits the number of connections? Should we mention that maybe your router has limitations? Or the modem? Or the ISP? Where do we stop mentioning limitations?

Valik use only rellevant examples please.

Have you ever heard about ISP using such limit (with such small number)? The same apply for default modem/router limitation.

If the default in Windows XP is such small (2 connections per server) then this should be mentioned by my opinion.

Of course server limits are well known to all I think but these "local" limits aren't.

Edited May 1, 2010 by Zedna

[Valik]

Zedna, how do you know the examples aren't relevant? The connection limit on a router running default dd-wrt could hit the maximum TCP/UDP connections if a P2P client is running. That's also possible with a modem. As for the ISP? One word: Comcast. They throttled P2P traffic, what makes you think they or some other company wouldn't try to throttle downloads?

Edited May 2, 2010 by Valik

[Zedna]

@Valik

Sorry then. Here in the Czech Republic there are no such ISPs as far as I know.

Anyway some notice in remarks could be good.