by Friso Kluitenberg (2 Submissions)
Category: Internet/HTML
Compatability: Visual Basic 4.0 (32-bit)
Difficulty: Unknown Difficulty
Originally Published: Thu 9th August 2007
Date Added: Mon 8th February 2021
Rating: 
(1 Votes)
This code is an library of functions, to parse and process html. This library is good for datamining, parsing and extracting data in your
VBcoders
Public Sub GetAllTags(sHtml As String, ByRef sArray() As String)
Dim Pos1 As Long
Dim Pos2 As Long
Dim ub As Long
ReDim sArray(0)
Do
Pos1 = InStr(Pos2 + 1, sHtml, "<")
Pos2 = InStr(Pos1 + 1, sHtml, ">")
If (Pos1 < 1) Or (Pos2 < 1) Then Exit Do
ub = UBound(sArray)
sArray(ub) = Mid$(sHtml, Pos1, Pos2 - Pos1 + 1)
ReDim Preserve sArray(ub + 1)
Loop
If ub > 0 Then ReDim Preserve sArray(ub)
End Sub
Public Function GetTagType(Tag As String) As String
Dim Pos As Integer
If Tag = vbNullString Then Exit Function
Pos = InStr(1, Tag, " ")
If Pos < 1 Then Pos = Len(Tag)
GetTagType = LCase$(Mid$(Tag, 2, Pos - 2))
End Function
Public Function GetTagAttrValue(Tag, Attr As String) As String '//<a href=> href is the attr
Dim Pos As Long
Dim Pos2 As Long
Dim Sep As String
Attr = " " & Attr '//An atribute is always prefixed with a space
Pos = InStr(1, LCase$(Tag), LCase$(Attr))
If Pos < 1 Then Exit Function '// ATTR NOT FOUND___
Pos = Pos + Len(Attr) '//Move forward to the end of attr
Do
Sep = Mid$(Tag, Pos, 1)
Pos = Pos + 1
Loop While (Sep = " ") Or (Sep = "=")
Select Case Sep
Case "'"
Pos2 = InStr(Pos + 1, Tag, "'")
If Pos2 = 0 Then Exit Function
GetTagAttrValue = Mid$(Tag, Pos, Pos2 - Pos)
Case Chr(34)
Pos2 = InStr(Pos + 1, Tag, Chr(34))
If Pos2 = 0 Then Exit Function
GetTagAttrValue = Mid$(Tag, Pos, Pos2 - Pos)
Case Else 'sep is " ", or ">"
Pos2 = InStr(Pos + 1, Tag, " ")
If Pos2 < 1 Then Pos2 = Len(Tag) - 1 '//if no space is found, the end='>', thats always on the end so len is faster
GetTagAttrValue = Mid$(Tag, Pos - 1, Pos2 - Pos + 1)
End Select
End Function
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