Extract string from web page

I'm trying to extract the MD5 sum from a web page into a var. I'm
close! So far I have:

# Piping the output directly into select-string didn't work for some
reason... so use temp file
(new-object System.Net.WebClient).DownloadString
"http://www.symantec.com/avcenter/download/pages/US-SAVCE.html" >
out.txt

# Note that the regex [0-9A-F]{32} didn't take, so PSH must not handle
extended regex?
get-content P:\bin\out.txt | select-string -quiet -List -pattern
[0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F]

This gets you down to the line I want, but I only want the MD5. If I
put the get-content line into a var $a, then I can do a $a.pattern --
but that returns my regex and not the MD5 sum. I know this is a stupid
question, but I can't figure out how to break out the MD5 sum out of
the line!

Thanks for your time,

bh

"Brian Hoort" <brian.hoort@gmail.com> wrote in message news:1168465846.594914.288390@p59g2000hsd.googlegroups.com...
> I'm trying to extract the MD5 sum from a web page into a var. I'm
> close! So far I have:
>
> # Piping the output directly into select-string didn't work for some
> reason... so use temp file
> (new-object System.Net.WebClient).DownloadString
> "http://www.symantec.com/avcenter/download/pages/US-SAVCE.html" >
> out.txt
>
> # Note that the regex [0-9A-F]{32} didn't take, so PSH must not handle
> extended regex?
> get-content P:\bin\out.txt | select-string -quiet -List -pattern
> [0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F]
>
> This gets you down to the line I want, but I only want the MD5. If I
> put the get-content line into a var $a, then I can do a $a.pattern --
> but that returns my regex and not the MD5 sum. I know this is a stupid
> question, but I can't figure out how to break out the MD5 sum out of
> the line!

This will get you closer:

169> (new-object Net.WebClient).DownloadString("http://www.symantec.com/avcenter/download/pages/US-SAVCE.html") -match "(?<md5hash>[0-9a-fA-F]{32})"
True
170> $matches

Name Value
---- -----
md5hash DAE22DC8610A895DCF81BEBAC3F2EEDF
0 DAE22DC8610A895DCF81BEBAC3F2EEDF

Unfortunately that only matches the first hash. So what's the regex trick to get this to match all instances of hashes on this page?

--
Keith

Try this:

$md5_regex =[regex] "(?<md5hash>[0-9a-fA-F]{32})+"
$page = (new-object
Net.WebClient).DownloadString("http://www.symantec.com/avcenter/download/pages/US-SAVCE.html")

$md5 = $md5_regex.match($page)

while ($md5.success)
{
$md5.value
$md5 = $md5.nextmatch()
}




"Keith Hill [MVP]" wrote:

> "Brian Hoort" <brian.hoort@gmail.com> wrote in message news:1168465846.594914.288390@p59g2000hsd.googlegroups.com...
> > I'm trying to extract the MD5 sum from a web page into a var. I'm
> > close! So far I have:
> >
> > # Piping the output directly into select-string didn't work for some
> > reason... so use temp file
> > (new-object System.Net.WebClient).DownloadString
> > "http://www.symantec.com/avcenter/download/pages/US-SAVCE.html" >
> > out.txt
> >
> > # Note that the regex [0-9A-F]{32} didn't take, so PSH must not handle
> > extended regex?
> > get-content P:\bin\out.txt | select-string -quiet -List -pattern
> > [0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F]
> >
> > This gets you down to the line I want, but I only want the MD5. If I
> > put the get-content line into a var $a, then I can do a $a.pattern --
> > but that returns my regex and not the MD5 sum. I know this is a stupid
> > question, but I can't figure out how to break out the MD5 sum out of
> > the line!
>
> This will get you closer:
>
> 169> (new-object Net.WebClient).DownloadString("http://www.symantec.com/avcenter/download/pages/US-SAVCE.html") -match "(?<md5hash>[0-9a-fA-F]{32})"
> True
> 170> $matches
>
> Name Value
> ---- -----
> md5hash DAE22DC8610A895DCF81BEBAC3F2EEDF
> 0 DAE22DC8610A895DCF81BEBAC3F2EEDF
>
> Unfortunately that only matches the first hash. So what's the regex trick to get this to match all instances of hashes on this page?
>
> --
> Keith

Or, as a one-line:

([regex]"(?<md5hash>[0-9a-fA-F]{32})").Matches((new-object
System.Net.WebClient).DownloadString("http://www.symantec.com/avcenter/download/pages
/US-SAVCE.html")) |% { $_.Value }

Nick



Rob Campbell wrote:
> Try this:
>
> $md5_regex =[regex] "(?<md5hash>[0-9a-fA-F]{32})+"
> $page = (new-object
> Net.WebClient).DownloadString("http://www.symantec.com/avcenter/download/pages/US-SAVCE.html")
>
> $md5 = $md5_regex.match($page)
>
> while ($md5.success)
> {
> $md5.value
> $md5 = $md5.nextmatch()
> }
>
>
>
>
> "Keith Hill [MVP]" wrote:
>
>> "Brian Hoort" <brian.hoort@gmail.com> wrote in message news:1168465846.594914.288390@p59g2000hsd.googlegroups.com...
>>> I'm trying to extract the MD5 sum from a web page into a var. I'm
>>> close! So far I have:
>>>
>>> # Piping the output directly into select-string didn't work for some
>>> reason... so use temp file
>>> (new-object System.Net.WebClient).DownloadString
>>> "http://www.symantec.com/avcenter/download/pages/US-SAVCE.html" >
>>> out.txt
>>>
>>> # Note that the regex [0-9A-F]{32} didn't take, so PSH must not handle
>>> extended regex?
>>> get-content P:\bin\out.txt | select-string -quiet -List -pattern
>>> [0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F][0-9A-F]
>>>
>>> This gets you down to the line I want, but I only want the MD5. If I
>>> put the get-content line into a var $a, then I can do a $a.pattern --
>>> but that returns my regex and not the MD5 sum. I know this is a stupid
>>> question, but I can't figure out how to break out the MD5 sum out of
>>> the line!
>> This will get you closer:
>>
>> 169> (new-object Net.WebClient).DownloadString("http://www.symantec.com/avcenter/download/pages/US-SAVCE.html") -match "(?<md5hash>[0-9a-fA-F]{32})"
>> True
>> 170> $matches
>>
>> Name Value
>> ---- -----
>> md5hash DAE22DC8610A895DCF81BEBAC3F2EEDF
>> 0 DAE22DC8610A895DCF81BEBAC3F2EEDF
>>
>> Unfortunately that only matches the first hash. So what's the regex trick to get this to match all instances of hashes on this page?
>>
>> --
>> Keith