Public Function GetImage(ByVal ImageURL As String, ByVal pb As PictureBox) As Boolean
Dim objImage As MemoryStream
Dim objwebClient As WebClient
Dim sURL As String = Trim(ImageURL)
Dim bAns As Boolean
Try
If Not sURL.ToLower().StartsWith("http://") _
Then sURL = "http://" & sURL
objwebClient = New WebClient()
objImage = New _
MemoryStream(objwebClient.DownloadData(sURL))
pb.Image = Image.FromStream(objImage)
bAns = True
Catch ex As Exception
bAns = False
End Try
Return bAns
End Function
[VB.net] How to grab the Neopets Main shop captcha
Started by Backslash, Oct 24 2009 08:10 AM
7 replies to this topic
#1
Backslash
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Posted 24 October 2009 - 08:10 AM
#2
((_Blade_))
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Posted 24 October 2009 - 09:36 AM
Just tried it...it works fine. Whats the error you're getting?
'Example Usage
GetImage("http://images.neopets.com/items/mall_aotaticket_challenge.gif", PictureBox1)
#3
Backslash
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Posted 24 October 2009 - 09:39 AM
Yes it works, but not for:
http://www.neopets.c...tcha_show.phtml
which is the image for the captcha.
Not sure what the problem is, i think it has something to do with the headers, making it corrupted image.
http://www.neopets.c...tcha_show.phtml
which is the image for the captcha.
Not sure what the problem is, i think it has something to do with the headers, making it corrupted image.
#4
((_Blade_))
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Posted 24 October 2009 - 10:14 AM
Yes it works, but not for:
http://www.neopets.c...tcha_show.phtml
which is the image for the captcha.
Not sure what the problem is, i think it has something to do with the headers, making it corrupted image.
You need to be logged in in-order to view that image
Just tried
Dim html As String = objwebClient.DownloadString("http://www.neopets.com/captcha_show.phtml")which returned
DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <!-- host - neopets-web-87.811.mtvi.com //--> <html> <head> <meta name="description" content="Neopets.Com - Virtual Pet Community! Join up for free games, shops, auctions, chat and more!"> .... <a href="/loginpage.phtml"><b>Login to Neopets!</b></a> </td> ....
Try using the net.sockets class to send the cookies + retrieve data. There should be a few .Net HTTPWrappers floating around that already do this for you (Google's your friend
)
Edited by ((_Blade_)), 24 October 2009 - 10:15 AM.
#5
Backslash
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Posted 24 October 2009 - 10:24 AM
Thanks for the help! I tried googling, but all I got was the wrapper I have. I will look some more.
#6
((_Blade_))
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Posted 24 October 2009 - 10:39 AM
http://lmgtfy.com/?q=httpwrapper+vb.netThanks for the help! I tried googling, but all I got was the wrapper I have. I will look some more.
(Always wanted to try that xD )
Check the first link. It looks complete (never tried it so I don't know if it has bugs in it)
Once you've logged in + retrived the source, make sure you strip the headers from it (if there is any...you usually never have to do this)...
Dim i As Integer = html.IndexOf("\r\n\r\n") + 4
html = html.Substring(i, html.Length - i)then set the picturebox to the image
pb.Image = Image.FromStream(New MemoryStream(Encoding.Default.GetBytes(html)))
Otherwise you're going to get "invaild paramater" errors
Edit...added references you might need
Imports System.IO Imports System.Net Imports System.Text
Edited by ((_Blade_)), 24 October 2009 - 11:11 AM.
#7
Backslash
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Posted 24 October 2009 - 11:28 AM
Okay i edited my whole form with the new wrapper, and now it doesnt log in, its giving me an error, but with the other wrapper it works fine
Edit: I found a variation of the TCPWrapper and currently trying..
Great... It didnt work. It has a Grabpic function that atuomatically strips the headers, but my form freezes. This is gonna take ages ;-;
Edit: I found a variation of the TCPWrapper and currently trying..
Great... It didnt work. It has a Grabpic function that atuomatically strips the headers, but my form freezes. This is gonna take ages ;-;
Edited by Backslash, 24 October 2009 - 11:21 AM.
#8
((_Blade_))
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Posted 24 October 2009 - 05:26 PM
Okay i edited my whole form with the new wrapper, and now it doesnt log in, its giving me an error, but with the other wrapper it works fine
Edit: I found a variation of the TCPWrapper and currently trying..
Great... It didnt work. It has a Grabpic function that automatically strips the headers, but my form freezes. This is gonna take ages ;-;
Does the form freeze temporarily while downloading the source or indefinitely?
If its the temporary...then everything's GOOD. The wrapper's just preoccupied for a bit so the forms not being repainted.
Look up tutorials on multithreading for .Net and run the wrapper on a different thread to keep the gui responsive.
(I'm searching my backups for my old AB written in C#. Once I find it, its source code will probably be uploaded publicly so people can learn from it
)
Edited by ((_Blade_)), 24 October 2009 - 05:37 PM.
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