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Tip of the Day
Language: VB4,VB5,VB6,VBS
Expertise: Intermediate
Jan 27, 2001



Application Security Testing: An Integral Part of DevOps

URLEncode - Convert a string for using on a URL query string

' convert a string so that it can be used on a URL query string
' Same effect as the Server.URLEncode method in ASP

Function URLEncode(ByVal Text As String) As String
    Dim i As Integer
    Dim acode As Integer
    Dim char As String
    URLEncode = Text
    For i = Len(URLEncode) To 1 Step -1
        acode = Asc(Mid$(URLEncode, i, 1))
        Select Case acode
            Case 48 To 57, 65 To 90, 97 To 122
                ' don't touch alphanumeric chars
            Case 32
                ' replace space with "+"
                Mid$(URLEncode, i, 1) = "+"
            Case Else
                ' replace punctuation chars with "%hex"
                URLEncode = Left$(URLEncode, i - 1) & "%" & Hex$(acode) & Mid$ _
                    (URLEncode, i + 1)
        End Select
End Function

Francesco Balena
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