| Re: Download files from the web [message #86945 is a reply to message #86942] |
Mon, 16 December 2013 06:14   |
Mats Löfdahl
Messages: 263
Registered: January 2012
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Senior Member |
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Den måndagen den 16:e december 2013 kl. 14:41:08 UTC+1 skrev Helder:
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>>> if it helps, i used the IDLnetUrl object and then use the getProperty method to get the Response_code value. Not sure if it helps, but I have been downloading files successfully with https. I also use the callback_function to make a progress bar.
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>>> Not sure if it helps, but it might be a place to start...
Thanks. But it seems it has the same problem as the webget function, in that it can't tell the difference between a proper download and a 404 error web page.
I simplified your code a bit (because I don't need the progress bar) and came up with this:
function downloadurl, url, file
url_scheme = (strsplit(url, ':',/extract))[0]
url_hostname = strjoin((strsplit(url,'/',/extract))[1:*],'/')
oUrl = OBJ_NEW('IDLnetUrl', URL_SCHEME = url_scheme, URL_HOSTNAME = url_hostname)
retrievedFilePath = oUrl->Get(FILENAME=file)
oUrl->GetProperty, RESPONSE_CODE=RespCode ; 200 = OK
oUrl->CloseConnections
OBJ_DESTROY, oUrl
return, RespCode eq 200 ; True if OK
end
I tried it both with a url pointing to an existing web page and to a non-existing page. In both cases I get RespCode eq 200. With the non-existing page I again had downloaded a 404 error page.
I got the value 200 for OK from the list at http://www.exelisvis.com/docs/IDLnetURL.html#objects_network _1009015_1417867
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