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75 lines
3.1 KiB
Plaintext
75 lines
3.1 KiB
Plaintext
Function ValidateEmailAddress(sEmailAddr)
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Dim sDomain 'as String
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'Get domain portion of email address.
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sDomain = Mid(sEmailAddr, Instr(1, sEmailAddr, "@") + 1)
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'Create Object for Reg. Expressions matching to validate address.
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'This script will first validate that the email address is of valid format
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'It then validates the domain portion by doing a nslookup.
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Set oRegExp = new RegExp
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oRegExp.Pattern = "^\w+(\.\w+)*@\w+\.\w+(\.\w+)*$"
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oRegExp.IgnoreCase = true
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'Excute the pattern matching to return a collection.
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Set colMatches = oRegExp.Execute(sEmailaddr)
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'If colMatches = 1 then the email address is of valid format.
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Response.write "colMatch = " & colMatches.count & "<BR>"
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'Response.write "colMatch = " & colMatches(0). & "<BR>"
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If colMatches.Count = 1 then
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'If the email address is valid format then we don't
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'want to run this and create any more delay or cpu cycles
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'than are needed.
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If DomainLookup(sDomain) then ValidateEmailAddress = true
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Else
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'It wasn't Valid
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ValidateEmailAddress = false
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End If
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Set colMatches = Nothing
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Set objRegExpr = Nothing
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End Function
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Function DomainLookup(sDomain)
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Dim sReadData 'As String
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Dim fIpIsNextLine 'Ad boolean
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'Create Shell Object
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set oShell = Server.CreateObject("Wscript.Shell")
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'Run NSLookup via Command Prompt
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'Dump Results into a temp text file
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'The text file is unique and stored in the directory specified
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'using the %Tmp% environment variable. This file will be deleted
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'after validation.
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'If you can not validate against the local name server for some reason you can specify a
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'Name server by uncommenting this line and replacing the name of the server.
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'oShell.Run "%ComSpec% /c nslookup " & sDomain & " WEBTERMINATOR1.Crystaltech.com > %Tmp%" & _
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' Session.SessionID & sDomain & ".txt", 0, True
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oShell.Run "%ComSpec% /c nslookup " & sDomain & " > %Tmp%" & _
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Session.SessionID & sDomain & ".txt", 0, True
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'Open the temp Text File and Read out the Data
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Set FSO = Server.CreateObject("Scripting.FileSystemObject")
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Set oText = Fso.OpenTextFile("%Tmp%" & Session.SessionID & sDomain & ".txt")
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Do While Not oText.AtEndOfStream
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'Read In the Text Dump
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sReadData = Trim(oText.Readline)
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'If the domain name was found in the previous line read then this should be the IP.
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If fIpIsNextLine then DomainLookup = True
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'If the domain name was found in the Read line then the tell it the
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'next line is the Ip. If an IP address was not found then it should not
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'return the domain we are looking for in the txt file.
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Response.write sReadData & "<BR>"
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If Instr(1, sReadData, sDomain) then fIpIsNextLine = true
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Loop
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'Close it
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oText.Close
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'Delete It
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FSO.DeleteFile "%Tmp%" & Session.SessionID & sDomain & ".txt"
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Set FSO = Nothing
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End Function
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