Hi,

I am wondering if there is a way to monitor a file's download progress.
Since MsgPlus.DownloadFile() can't do this, I am looking for other ways to download a file, perhaps even with an XMLHTTP request (but there's probably some function in the Windows API, that's unknown to me ).

So, is there any way to monitor download progresses as IE and FireFox do?

Thanks in advance.

There is a control that displays a bar in the window which is like downloading but not like displaying a progress.

Here it is:

<Control xsi:type="ProgressControl" Id="Example">
        <Position Top="5" Width="100" Left="0" Height="10"/>
                <Marquee/>
</Control>

Call the MsgPlus.DownloadFile with a OutFile parameter that you know, and then check the filesize of the OutFile, based on a timer (FSO object, GetFile method, Size property).

Okay, that's an option for a known file.. But it won;t be possible for unknown OutFile's..

EDIT::

Here's what I'd like to do:

quote:

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Originally posted by Basilis
There is a control that displays a bar in the window which is like downloading but not like displaying a progress.

Here it is:

<Control xsi:type="ProgressControl" Id="Example">
        <Position Top="5" Width="100" Left="0" Height="10"/>
                <Marquee/>
</Control>

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quote:

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Originally posted by SmokingCookie
However, Microsoft has been so nice not to write an easy function to detect progresses .

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Okay, then I'll do that.

However, one CAN make a progress bar indicating the readyState of an XMLHTTP request. Example:

Debug.Trace("> " + (25 * XMLHTTP.readyState));

This will go no further than 100%, so it's possible to indicate what the script is doing (sending request, receiving headers etc.)

quote:

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Originally posted by SmokingCookie
Okay, then I'll do that.

However, one CAN make a progress bar indicating the readyState of an XMLHTTP request. Example:

Debug.Trace("> " + (25 * XMLHTTP.readyState));

This will go no further than 100%, so it's possible to indicate what the script is doing (sending request, receiving headers etc.)

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quote:

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Originally posted by CookieRevised
(Do I smell a suggestion for the MsgPlus.DownloadFile() function here? )

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That certainly is a good idea .. But at high download speeds, this event would be triggerd.. Many times (like an infinite loop). And I'm not even talking about big files being dowloaded at high speed..

Timers can be triggered extremely quickly to though....

Then again, it could be solved a bit by adding a packet size parameter to DownloadFile() (or new downloadfile function) to tell Plus! to trigger DownloadFileProgress() each x bytes.

-------

Anyways, can't you just make something with some kind of ActiveX object or whatever. I mean, when you download a file with your browser, it usually tells you also how big the file is and thus being able to show you a progress dialog. So, find out how they do that (probably sending some kind of request first) and do the same in your script.

I've been considering this too, but I haven't seen any possibility (yet).

Anyway, I'm off now, I'll think of it tomorrow

quote:

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Originally posted by CookieRevised
when you download a file with your browser, it usually tells you also how big the file is and thus being able to show you a progress dialog. So, find out how they do that (probably sending some kind of request first) and do the same in your script.

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code:

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var url  = 'http://www.google.co.uk/intl/en_uk/images/logo.gif';
var http = new ActiveXObject('Microsoft.XMLHTTP');
http.open('HEAD', url, true);
http.onreadystatechange = function(){
   if(http.readyState == 4){
      if(http.status == 200){
         Debug.Trace(http.getResponseHeader('Content-Length'));
      }
   }
}
http.send(null);

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I just was looking around too, and found roughly the same thing. However, it should be done with readyState 3, not with 4.... (as 4 is triggered when done)?

http://www.sitepoint.com/blogs/2004/05/26/xmlhttp...vascript-closures/

code:

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86                // Called multiple while downloading in progress
87                case 3:
88                    // Notify user handler of download progress
89                    try {
90                        // Get the total content length
91                        // -useful to work out how much has been downloaded
92                        try {
93                            var contentLength = client.xmlhttp.getResponseHeader("Content-Length");
95                        } catch ( e) {
96                            var contentLength = NaN;
97                        } 
98     
99                        // Call the progress handler with what we've got
100                        client.userhandler.onProgress(
101                            client.xmlhttp.responseText,
102                            contentLength
103                        );
104     
105                    } catch ( e) { /* Handler method not defined */ }
106                break;

...

131        onProgress: function(responseText, length) {
132            echo("Downloaded "+responseText.length+" of "+length+"<br>");
133        },

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quote:

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Originally posted by CookieRevised
I just was looking around too, and found roughly the same thing. However, it should be done with readyState 3, not with 4....

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I tried it in readyState 3 just in case and it throws a very descriptive "Unspecified error" It seems the response (getResponseHeader, responseText etc.) can't be accessed until the request is complete?

quote:

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Originally posted by http://msdn.microsoft.com/en-us/library/ms534361(VS.85).aspx

3 (Receiving)     Some data has been received. responseText is not available. responseBody is not available.
4 (Loaded)    All the data has been received. responseText is available. responseBody is available.

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@ CookieRevised:

I have checked your code on the site you've linked to, and found this in the code:

// Mozilla only implementation!  (Line 6)

I don't know if this is imprtant, but I'll give it a try.

@Eljay:

Following code is based on yours:

code:

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function OnEvent_Initialize(MessengerStart) {
    if(Messenger.MyStatus > STATUS_UNKNOWN) {
        var url  = "http://tom.zegiklekkerniet.googlepages.com/DateCalculator.plsc";
        var http = new ActiveXObject("Microsoft.XMLHTTP");
        http.open("HEAD", url, true);
        http.onreadystatechange = function() {
            if(http.readyState == 4 && http.status == 200) {
                FileSize = http.getResponseHeader("Content-Length");
                Debug.Trace("> " + FileSize);
            }
        }
        http.send(null);
    }
}

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quote:

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Originally posted by SmokingCookie
@ CookieRevised:

I have checked your code on the site you've linked to, and found this in the code:

// Mozilla only implementation!  (Line 6)

I don't know if this is imprtant, but I'll give it a try.

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quote:

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Originally posted by Eljay
Edit: found this:

quote:

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Originally posted by http://msdn.microsoft.com/en-us/library/ms534361(VS.85).aspx

3 (Receiving)     Some data has been received. responseText is not available. responseBody is not available.
4 (Loaded)    All the data has been received. responseText is available. responseBody is available.

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The remarks also provide a couple of possibilities that could be used, I shall experiment further

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quote:

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Originally posted by CookieRevised

Mozilla and MSIE have the xmlhttp object implemented differently.  I thought the code was for MSIE, showing an alternative way for something you could do in Mozilla.... I guess it was the other way around.... That's what you get when you're hasty , sorry...

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quote:

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Originally posted by CookieRevised
cool... ServerXMLHTTP seems promissing a first sight. the IXMLHTTP object needs a language to be set for viewing webpages in order to work if I read it correctly.

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quote:

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De gegevens die nodig zijn voor deze bewerking zijn nog niet beschikbaar.

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quote:

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The data needed for this operation isn't available yet.

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Because other methods are not working (as experimented in this thread), I have brought in a suggestion for a MsgPlus.DownloadFile enhancement.

You can get partial downloads by using the APIs of WININET.DLL directly. I've done this a long time ago in a big Excel project, which I completely forgot about.