download picture from web

[GerdW]

Hello everybody,

I want to load a picture from the internet and used normal TCP-commands (TCPOpen, 'Get', TCPRead). Last week I found the following article (with vi):
http://digital.ni.com/public.nsf/3efedde4322fef19862567740067f3cc/b92648089952cdd386256d0f00792187?OpenDocument

But now I'm stucked:
When the internet address starts with "http://www."  then LabView gets the picture. When the internet address starts with a different name (i.e. not "www") LabView cannot find the picture even when the address uses the http-protocol ("http://images.chron.com/apps/comics/images/2005/12/5/Dilbert.133.g.gif" :-)

What to do?

[tst]

The downloading works fine for me - LV does get the file data and displays it in the string. The problem then is that it can't open a GIF file, because LV doesn't support GIF inherently (although there is a Write GIF VI which is shipped with LV). I think George Zou has VIs which read GIF. Try looking at his site.

[becktho]

Hi GerdW, tst

I just tried the vi which is available in the thread mentioned by GerdW. Passing the url of the gif-file, I also don't get a picture, but not because of the file format. There is no data read.

Thomas

[GerdW]

Hello Thomas,

yes there is no data read. But in IE (or FireFox or whatever) this url gives me the picture...
Actually I did 'copy & paste' the url from explorer to LabView. Normally I load the webpage ('http://www.chron.com/apps/comics/showComic.mpl?date=2005/12/5&name=Dilbert'), parse the html to get the url of the pic and save the pic. This is broken since 'www.chron.com' changed their picture server to 'images.chron.com'.
So I wonder why LabView can't find the url when IE can?

Update: Now LabView finds the picture data (as tst also said). In the morning I got an error 1184... Interesting ;-|

[Dynamik]

Hi All,

      JPG_to_picture didn't like this URL

http://images.chron.com/apps/comics/images/2005/12/5/Dilbert.133.g.gif

(Datasocket Read produces an error - nothing returned), but data was returned with the following URL

http://images.chron.com/apps/comics/images/2005/12/5/Dilbert.133.g.gif[text]

.. of course one would still have to deal with the GIF.text (like tst already said)

Message Edited by Dynamik on 12-06-2005 03:19 AM