如何从网站的搜索栏中删除所有可能的结果
问题描述 投票：0回答：1
这是我的第一个网络抓取任务。我的任务是抓this网站
这是一个包含丹麦律师姓名的网站。我的困难是我只能根据我在搜索栏中输入的特定名称查询来检索名称。是否有一个在线网络工具，我可以用来刮取网站包含的所有名称？我使用像Import.io这样的工具到目前为止没有成功。我对这一切的运作方式感到非常困惑。
1个回答
1
投票
投票
请向下滚动到更新2
该网站强制您输入至少一个搜索参数，因此您可以遍历Arbejdsområde列表的所有项目，为每个项目发出请求。下面是一个示例，展示了如何在Excel VBA中完成（打开VBE，创建标准模块，粘贴代码并运行Test()）：
Option Explicit
Sub Test()
Dim sResponse As String
Dim oItems As Object
Dim vItem
Dim aData
Dim sContent As String
Dim lPage As Long
Dim i As Long
Dim j As Long
' Retrieve search page HTML content
XmlHttpRequest "GET", "http://www.advokatnoeglen.dk/", "", "", "", sResponse
' Extract work areas items
ExtractOptions sResponse, "ctl00$ContentPlaceHolder$Search$AreaSelect", oItems
oItems.Remove oItems.Keys()(0)
sContent = ""
' Process each work area item
For Each vItem In oItems.Items()
Debug.Print "Item [" & vItem & "]"
lPage = 0
' Process each results page
Do
Debug.Print vbTab & "Page [" & lPage & "]"
' Retrieve result page HTML content
XmlHttpRequest "GET", "http://www.advokatnoeglen.dk/sog.aspx?s=1&t=0&a=" & vItem & "&p=" & lPage, "", "", "", sResponse
' Extract result table
ParseResponse _
"<table\b[^>]*?id=""ctl00_ContentPlaceHolder_Grid""[^>]*>([\s\S]*?)</table>", _
sResponse, _
aData, _
False
' Store parsed table
sContent = sContent & aData(0)
Debug.Print vbTab & "Parsed " & Len(sContent)
lPage = lPage + 1
DoEvents
Loop Until InStr(sResponse, "<a class=""next""") = 0
Next
' Extract data from the whole content
ParseResponse _
"<tr.*?onclick=""location.href='([^']*)'"">\s*" & _
"<td[^>]*>\s*([\s\S]*?)\s*</td>\s*" & _
"<td[^>]*>\s*([\s\S]*?)\s*</td>\s*" & _
"<td[^>]*>\s*([\s\S]*?)\s*</td>\s*" & _
"</tr>", _
sContent, _
aData, _
False
' Rebuild nested arrays to 2d array for output
aData = Denestify(aData)
' Decode HTML
For i = 1 To UBound(aData, 1)
For j = 2 To 4
aData(i, j) = GetInnerText((aData(i, j)))
Next
Next
' Output
With ThisWorkbook.Sheets(1)
.Cells.Delete
Output2DArray .Cells(1, 1), aData
.Columns.AutoFit
.Rows.AutoFit
End With
MsgBox "Completed"
End Sub
Sub XmlHttpRequest(sMethod, sUrl, aSetHeaders, sFormData, sRespHeaders, sRespText)
Dim aHeader
'With CreateObject("MSXML2.ServerXMLHTTP")
'.SetOption 2, 13056 ' SXH_SERVER_CERT_IGNORE_ALL_SERVER_ERRORS
With CreateObject("MSXML2.XMLHTTP")
.Open sMethod, sUrl, False ' , "u051772", "fy17janr"
If IsArray(aSetHeaders) Then
For Each aHeader In aSetHeaders
.SetRequestHeader aHeader(0), aHeader(1)
Next
End If
.Send (sFormData)
sRespHeaders = .GetAllResponseHeaders
sRespText = .ResponseText
End With
End Sub
Sub ExtractOptions(sContent As String, ByVal sName As String, oOptions As Object)
Dim aTmp0
Dim vItem
' Escape RegEx special characters
For Each vItem In Array("\", "*", "+", "?", "^", "$", ".", "[", "]", "{", "}", "(", ")", "|", "/")
sName = Replace(sName, vItem, "\" & vItem)
Next
' Extract the whole <select> for parameter
ParseResponse "<select[^>]* name=""?" & sName & """?[^>]*>[^<]*((?:<option[^>]*>[^<]*</option>[^<]*)+)[^<]*</[^>]*>", sContent, aTmp0, False
' Extract each parameter <option>
ParseResponse "<option[^>]*value=(""[^""]*""|[^\s>]*)[^>]*>([^<]*)</option>", (aTmp0(0)), aTmp0, False
' Put each parameter and value into dictionary
Set oOptions = CreateObject("Scripting.Dictionary")
For Each vItem In aTmp0
oOptions(GetInnerText((vItem(1)))) = GetInnerText(Replace(vItem(0), """", ""))
Next
End Sub
Sub ParseResponse(sPattern, sResponse, aData, Optional bAppend As Boolean = True, Optional bGlobal = True, Optional bMultiLine = True, Optional bIgnoreCase = True)
Dim oMatch
Dim aTmp0()
Dim sSubMatch
If Not (IsArray(aData) And bAppend) Then aData = Array()
With CreateObject("VBScript.RegExp")
.Global = bGlobal
.MultiLine = bMultiLine
.IgnoreCase = bIgnoreCase
.Pattern = sPattern
For Each oMatch In .Execute(sResponse)
If oMatch.SubMatches.Count = 1 Then
PushItem aData, oMatch.SubMatches(0)
Else
aTmp0 = Array()
For Each sSubMatch In oMatch.SubMatches
PushItem aTmp0, sSubMatch
Next
PushItem aData, aTmp0
End If
Next
End With
End Sub
Sub PushItem(aData, vItem, Optional bAppend As Boolean = True)
If Not (IsArray(aData) And bAppend) Then aData = Array()
ReDim Preserve aData(UBound(aData) + 1)
aData(UBound(aData)) = vItem
End Sub
Function GetInnerText(sText As String) As String
Static oHtmlfile As Object
Static oDiv As Object
If oHtmlfile Is Nothing Then
Set oHtmlfile = CreateObject("htmlfile")
oHtmlfile.Open
Set oDiv = oHtmlfile.createElement("div")
End If
oDiv.innerHTML = sText
GetInnerText = oDiv.innerText
End Function
Function Denestify(aRows)
Dim aData()
Dim aItems()
Dim i As Long
Dim j As Long
If UBound(aRows) = -1 Then Exit Function
ReDim aData(1 To UBound(aRows) + 1, 1 To 1)
For j = 0 To UBound(aRows)
If IsArray(aRows(j)) Then
aItems = aRows(j)
For i = 0 To UBound(aItems)
If i + 1 > UBound(aData, 2) Then ReDim Preserve aData(1 To UBound(aRows) + 1, 1 To i + 1)
aData(j + 1, i + 1) = aItems(i)
Next
Else
aData(j + 1, 1) = aRows(j)
End If
Next
Denestify = aData
End Function
Sub Output2DArray(oDstRng As Range, aCells As Variant)
With oDstRng
.Parent.Select
With .Resize( _
UBound(aCells, 1) - LBound(aCells, 1) + 1, _
UBound(aCells, 2) - LBound(aCells, 2) + 1)
.NumberFormat = "@"
.Value = aCells
End With
End With
End Sub
第一次检索所有数据需要几分钟（之后再次启动时，所有请求都从缓存中加载，使流程速度明显加快，从服务器获取最新数据需要to clean up the cache in IE settings）。我的输出如下：
通常不推荐使用RegEx进行HTML解析，因此there is disclaimer。在这种情况下处理的数据非常简单，这就是使用RegEx解析的原因。关于RegEx：introduction（特别是syntax），introduction JS，VB flavor。
UPDATE
上面建议的抓取是基于解析由Arbejdsområde参数过滤的搜索结果，结果是，实际返回的结果是不准确的。那些有Arbejdsområder倍数的律师在结果中存在多次，而且Arbejdsområder空的根本没有结果。
可以用于这种刮擦的另一个参数而不是Arbejdsområde是Retskreds。所有律师记录都包含地址，只有一个地址，因此结果是完整的，不包含重复。请注意，一位律师可以与多个办事处联系，因此这将是结果中的几个记录。
有一些代码可以为循环中的每个条目抓取详细信息：
Option Explicit
Sub Test()
Dim sResponse As String
Dim oItems As Object
Dim vKey
Dim sItem As String
Dim aTmp
Dim aData
Dim lPage As Long
Dim i As Long
Dim j As Long
' Retrieve search page HTML content
XmlHttpRequest "GET", "http://www.advokatnoeglen.dk/", "", "", "", sResponse
' Extract Retskreds items
ExtractOptions sResponse, "ctl00$ContentPlaceHolder$Search$CourtSelect", oItems
oItems.Remove oItems.Keys()(0)
i = 0
' Process each Retskreds item
For Each vKey In oItems
sItem = oItems(vKey)
Debug.Print "Area " & sItem & " " & vKey
lPage = 0
' Process each results page
Do
Debug.Print vbTab & "Page " & lPage
' Retrieve results page
XmlHttpRequest "GET", "http://www.advokatnoeglen.dk/sog.aspx?s=1&t=0&c=" & sItem & "&p=" & lPage, "", "", "", sResponse
' Extract table
ParseResponse _
"<table\b[^>]*?id=""ctl00_ContentPlaceHolder_Grid""[^>]*>([\s\S]*?)</table>", _
sResponse, _
aTmp, _
False
' Extract data from the table
ParseResponse _
"<tr.*?onclick=""location.href='([^']*)'"">\s*" & _
"<td[^>]*>\s*([\s\S]*?)\s*</td>\s*" & _
"<td[^>]*>\s*([\s\S]*?)\s*</td>\s*" & _
"<td[^>]*>\s*([\s\S]*?)\s*</td>\s*" & _
"</tr>", _
aTmp(0), _
aData, _
True
' Add Retskreds name
For i = i To UBound(aData)
aTmp = aData(i)
PushItem aTmp, vKey
aData(i) = aTmp
Next
Debug.Print vbTab & "Parsed " & UBound(aData)
lPage = lPage + 1
DoEvents
Loop Until InStr(sResponse, "<a class=""next""") = 0
Next
' Retrieve detailed info for each entry
For i = 0 To UBound(aData)
aTmp = aData(i)
' Retrieve details page
aTmp(0) = "http://www.advokatnoeglen.dk" & aTmp(0)
' Extract details
XmlHttpRequest "GET", aTmp(0), "", "", "", sResponse
ParseResponse _
DecodeUriComponent( _
"Arbejdsomr%C3%A5der\: [\s\S]*?</h2>[\s\S]*?" & _
"Beskikkelses%C3%A5r\: ([^<]*)[\s\S]*?" & _
"F%C3%B8dsels%C3%A5r\: ([^<]*)[\s\S]*?" & _
"M%C3%B8deret for landsret\: ([^<]*)[\s\S]*?" & _
"M%C3%B8deret for h%C3%B8jesteret\: ([^<]*)[\s\S]*?" & _
"E-mail\: [\s\S]*?href='\/email\.aspx\?e\=(.*?)'[\s\S]*?" & _
"Mobiltlf\.\: ([\d\(\)\-+ ]*?)\s*<"), _
sResponse, _
aTmp, _
True, _
False
aTmp(9) = StrReverse(aTmp(9))
aData(i) = aTmp
Debug.Print vbTab & "Details " & i
DoEvents
Next
' Rebuild nested arrays to 2d array for output
aData = Denestify(aData)
' Decode HTML
For i = 1 To UBound(aData, 1)
For j = 2 To 4
aData(i, j) = Trim(Replace(GetInnerText((aData(i, j))), vbCrLf, ""))
Next
Next
' Output
With ThisWorkbook.Sheets(1)
.Cells.Delete
OutputArray .Cells(1, 1), _
Array("URL", _
"Navn", _
"Firma", _
DecodeUriComponent("Arbejdsomr%C3%A5der"), _
DecodeUriComponent("Retskreds"), _
DecodeUriComponent("Beskikkelses%C3%A5r"), _
DecodeUriComponent("F%C3%B8dsels%C3%A5r"), _
DecodeUriComponent("M%C3%B8deret for landsret"), _
DecodeUriComponent("M%C3%B8deret for h%C3%B8jesteret"), _
"E-mail", _
"Mobiltlf." _
)
Output2DArray .Cells(2, 1), aData
.Columns.AutoFit
.Rows.AutoFit
End With
MsgBox "Completed"
End Sub
Sub XmlHttpRequest(sMethod, sUrl, aSetHeaders, sFormData, sRespHeaders, sRespText)
Dim aHeader
'With CreateObject("MSXML2.ServerXMLHTTP")
'.SetOption 2, 13056 ' SXH_SERVER_CERT_IGNORE_ALL_SERVER_ERRORS
With CreateObject("MSXML2.XMLHTTP")
.Open sMethod, sUrl, False
If IsArray(aSetHeaders) Then
For Each aHeader In aSetHeaders
.SetRequestHeader aHeader(0), aHeader(1)
Next
End If
.Send (sFormData)
sRespHeaders = .GetAllResponseHeaders
sRespText = .ResponseText
End With
End Sub
Sub ExtractOptions(sContent As String, ByVal sName As String, oOptions As Object)
Dim aTmp0
Dim vItem
' Escape RegEx special characters
For Each vItem In Array("\", "*", "+", "?", "^", "$", ".", "[", "]", "{", "}", "(", ")", "|", "/")
sName = Replace(sName, vItem, "\" & vItem)
Next
' Extract the whole <select> for parameter
ParseResponse "<select[^>]* name=""?" & sName & """?[^>]*>[^<]*((?:<option[^>]*>[^<]*</option>[^<]*)+)[^<]*</[^>]*>", sContent, aTmp0, False
' Extract each parameter <option>
ParseResponse "<option[^>]*value=(""[^""]*""|[^\s>]*)[^>]*>([^<]*)</option>", (aTmp0(0)), aTmp0, False
' Put each parameter and value into dictionary
Set oOptions = CreateObject("Scripting.Dictionary")
For Each vItem In aTmp0
oOptions(GetInnerText((vItem(1)))) = GetInnerText(Replace(vItem(0), """", ""))
Next
End Sub
Sub ParseResponse(sPattern, sResponse, aData, Optional bAppend As Boolean = True, Optional bNestSubMatches = True, Optional bGlobal = True, Optional bMultiLine = True, Optional bIgnoreCase = True)
Dim oMatch
Dim aTmp0()
Dim sSubMatch
If Not (IsArray(aData) And bAppend) Then aData = Array()
With CreateObject("VBScript.RegExp")
.Global = bGlobal
.MultiLine = bMultiLine
.IgnoreCase = bIgnoreCase
.Pattern = sPattern
For Each oMatch In .Execute(sResponse)
If oMatch.SubMatches.Count = 1 Then
PushItem aData, oMatch.SubMatches(0)
Else
If bNestSubMatches Then
aTmp0 = Array()
For Each sSubMatch In oMatch.SubMatches
PushItem aTmp0, sSubMatch
Next
PushItem aData, aTmp0
Else
For Each sSubMatch In oMatch.SubMatches
PushItem aData, sSubMatch
Next
End If
End If
Next
End With
End Sub
Sub PushItem(aData, vItem, Optional bAppend As Boolean = True)
If Not (IsArray(aData) And bAppend) Then aData = Array()
ReDim Preserve aData(UBound(aData) + 1)
aData(UBound(aData)) = vItem
End Sub
Function DecodeUriComponent(sEncoded As String) As String
Static objHtmlfile As Object
If objHtmlfile Is Nothing Then
Set objHtmlfile = CreateObject("htmlfile")
objHtmlfile.parentWindow.execScript "function decode(s) {return decodeURIComponent(s)}", "jscript"
End If
DecodeUriComponent = objHtmlfile.parentWindow.decode(sEncoded)
End Function
Function GetInnerText(sText As String) As String
Static oHtmlfile As Object
Static oDiv As Object
If oHtmlfile Is Nothing Then
Set oHtmlfile = CreateObject("htmlfile")
oHtmlfile.Open
Set oDiv = oHtmlfile.createElement("div")
End If
oDiv.innerHTML = sText
GetInnerText = oDiv.innerText
End Function
Function Denestify(aRows)
Dim aData()
Dim aItems()
Dim i As Long
Dim j As Long
If UBound(aRows) = -1 Then Exit Function
ReDim aData(1 To UBound(aRows) + 1, 1 To 1)
For j = 0 To UBound(aRows)
If IsArray(aRows(j)) Then
aItems = aRows(j)
For i = 0 To UBound(aItems)
If i + 1 > UBound(aData, 2) Then ReDim Preserve aData(1 To UBound(aRows) + 1, 1 To i + 1)
aData(j + 1, i + 1) = aItems(i)
Next
Else
aData(j + 1, 1) = aRows(j)
End If
Next
Denestify = aData
End Function
Sub OutputArray(oDstRng As Range, aCells As Variant, Optional sFormat As String = "@")
With oDstRng
.Parent.Select
With .Resize(1, UBound(aCells) - LBound(aCells) + 1)
.NumberFormat = sFormat
.Value = aCells
End With
End With
End Sub
Sub Output2DArray(oDstRng As Range, aCells As Variant, Optional sFormat As String = "@")
With oDstRng
.Parent.Select
With .Resize( _
UBound(aCells, 1) - LBound(aCells, 1) + 1, _
UBound(aCells, 2) - LBound(aCells, 2) + 1)
.NumberFormat = sFormat
.Value = aCells
End With
End With
End Sub
4689名律师共有4896个参赛作品：
更新2
似乎得到完整的列表你可以用（空格）作为Firma参数进行搜索：http://www.advokatnoeglen.dk/sog.aspx?s=1&t=0&firm=%20，目前有6511个条目。应该更改结果解析的Sub Test()代码，如下所示：
Option Explicit
Sub Test()
Dim sResponse As String
Dim aTmp
Dim aData
Dim lPage As Long
Dim i As Long
Dim j As Long
lPage = 0
' Process each results page
Do
Debug.Print vbTab & "Page " & lPage
' Retrieve results page
XmlHttpRequest "GET", "http://www.advokatnoeglen.dk/sog.aspx?s=1&t=0&firm=%20&p=" & lPage, "", "", "", sResponse
' Extract table
ParseResponse _
"<table\b[^>]*?id=""ContentPlaceHolder_Grid""[^>]*>([\s\S]*?)</table>", _
sResponse, _
aTmp, _
False
' Extract data from the table
ParseResponse _
"<tr.*?onclick=""location.href='(.*?)'"">\s*" & _
"<td[^>]*>\s*([\s\S]*?)\s*</td>\s*" & _
"<td[^>]*>\s*([\s\S]*?)\s*</td>\s*" & _
"<td[^>]*>\s*([\s\S]*?)\s*</td>\s*" & _
"</tr>", _
aTmp(0), _
aData, _
True
Debug.Print vbTab & "Parsed " & (UBound(aData) + 1)
lPage = lPage + 1
DoEvents
Loop Until InStr(sResponse, "<a class=""next""") = 0
' Retrieve detailed info for each entry
For i = 0 To UBound(aData)
aTmp = aData(i)
' Retrieve details page
aTmp(0) = "http://www.advokatnoeglen.dk" & aTmp(0)
' Extract details
Do
XmlHttpRequest "GET", aTmp(0), "", "", "", sResponse
If InStr(sResponse, "<title>Runtime Error</title>") = 0 Then Exit Do
DoEvents
Loop
ParseResponse _
DecodeUriComponent( _
"Arbejdsomr%C3%A5der\: [\s\S]*?</h2>[\s\S]*?" & _
"Beskikkelses%C3%A5r\: ([^<]*)[\s\S]*?" & _
"(:?F%C3%B8dsels%C3%A5r\: ([^<]*)[\s\S]*?)?" & _
"M%C3%B8deret for landsret\: ([^<]*)[\s\S]*?" & _
"M%C3%B8deret for h%C3%B8jesteret\: ([^<]*)[\s\S]*?" & _
"(:?E-mail [\s\S]*?href='\/email\.aspx\?e\=(.*?)'[\s\S]*?)?" & _
"Mobiltlf\.\: ([\d\(\)\-+ ]*?)\s*<"), _
sResponse, _
aTmp, _
True, _
False
aTmp(8) = StrReverse(aTmp(8))
aData(i) = aTmp
Debug.Print vbTab & "Details " & i
DoEvents
Next
' Rebuild nested arrays to 2d array for output
aData = Denestify(aData)
' Decode HTML
For i = 1 To UBound(aData, 1)
For j = 2 To 4
aData(i, j) = Trim(Replace(GetInnerText((aData(i, j))), vbCrLf, ""))
Next
Next
' Output
With ThisWorkbook.Sheets(1)
.Cells.Delete
OutputArray .Cells(1, 1), _
Array("URL", _
"Navn", _
"Firma", _
DecodeUriComponent("Arbejdsomr%C3%A5der"), _
DecodeUriComponent("Beskikkelses%C3%A5r"), _
DecodeUriComponent("F%C3%B8dsels%C3%A5r"), _
DecodeUriComponent("M%C3%B8deret for landsret"), _
DecodeUriComponent("M%C3%B8deret for h%C3%B8jesteret"), _
"E-mail", _
"Mobiltlf." _
)
Output2DArray .Cells(2, 1), aData
.Columns.AutoFit
.Rows.AutoFit
End With
MsgBox "Completed"
End Sub
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