VBA 跨多个网页抓取

Question

所以，我有以下代码来从网站上抓取数据并且它工作没有任何问题。
我的 "issue" 现在我需要运行代码遍历多个网页，因为我正在抓取的网站有一个分页脚本。
例如：单个页面有 48 条记录，但在大多数情况下该页面有 200 多条记录，但它们被细分为 3/4 页。
我的代码：

Public Sub Roupa()
    Dim data As Object, i As Long, html As HTMLDocument, r As Long, c As Long, item As Object, div As Object
    Set html = New HTMLDocument                  '<== VBE > Tools > References > Microsoft HTML Object Library
    With CreateObject("MSXML2.XMLHTTP")
        .Open "GET", "https://www.worten.pt/grandes-eletrodomesticos/maquinas-de-roupa/maquinas-de-roupa-ver-todos-marca-BALAY-e-BOSCH-e-SIEMENS?per_page=100", False
        .send
        html.body.innerHTML = .responseText
    End With
    Set data = html.getElementsByClassName("w-product__content")
    For Each item In data
        r = r + 1: c = 1
        For Each div In item.getElementsByTagName("div")
            With ThisWorkbook.Worksheets("Roupa")
                .Cells(r, c) = div.innerText
            End With
            c = c + 1
        Next
    Next
    Sheets("Roupa").Range("A:A,C:C,F:F,G:G,H:H,I:I").EntireColumn.Delete
End Sub

更新
我试过在 With 之前添加这个 For n = 1 To 2，它有效，但我需要知道确切的页数，所以这不是很有帮助..

Answer 1

用结果数除以每页的结果数，计算出有多少页。然后循环将适当的页码连接到 url

Option Explicit
Public Sub Roupa()
    Dim data As Object, i As Long, html As HTMLDocument, r As Long, c As Long, item As Object, div As Object
    Set html = New HTMLDocument                  '<== VBE > Tools > References > Microsoft HTML Object Library
    Const RESULTS_PER_PAGE As Long = 48
    Const START_URL As String = "https://www.worten.pt/grandes-eletrodomesticos/maquinas-de-roupa/maquinas-de-roupa-ver-todos-marca-BALAY-e-BOSCH-e-SIEMENS?per_page=" & RESULTS_PER_PAGE & "&page=1"

    With CreateObject("MSXML2.XMLHTTP")
        .Open "GET", START_URL, False
        .setRequestHeader "User-Agent", "Mozilla/5.0"
        .send
        html.body.innerHTML = .responseText
        Dim numPages As Long, numResults As Long, arr() As String
        arr = Split(html.querySelector(".w-filters__element").innerText, Chr$(32))
        numResults = arr(UBound(arr))
        numPages = 1
        If numResults > RESULTS_PER_PAGE Then
            numPages = Application.RoundUp(numResults / RESULTS_PER_PAGE, 0)
        End If

        For i = 1 To numPages
             If i > 1 Then
                .Open "GET", Replace$("https://www.worten.pt/grandes-eletrodomesticos/maquinas-de-roupa/maquinas-de-roupa-ver-todos-marca-BALAY-e-BOSCH-e-SIEMENS?per_page=" & RESULTS_PER_PAGE & "&page=1", "page=1", "page=" & i), False
                .setRequestHeader "User-Agent", "Mozilla/5.0"
                .send
                 html.body.innerHTML = .responseText
            End If
            Set data = html.getElementsByClassName("w-product__content")
            For Each item In data
                r = r + 1: c = 1
                For Each div In item.getElementsByTagName("div")
                    With ThisWorkbook.Worksheets("Roupa")
                        .Cells(r, c) = div.innerText
                    End With
                    c = c + 1
                Next
            Next
        Next
    End With
    Sheets("Roupa").Range("A:A,C:C,F:F,G:G,H:H,I:I").EntireColumn.Delete
End Sub

想想@AhmedAu 所说的，如果页面已正确加载，看起来也是获取页数的好方法是简单地使用：

numPages = html.querySelectorAll("[data-page]").Length

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