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[公告2019/01/08] 請注意:我再次重申,部落格文章的程式碼,是要提供各位參考與學習,一旦網頁改版請自行修改,別要求東要求西要我主動修改,你們用我寫東西賺錢了、交差了,請問有分我一杯羹嗎?既然賺錢沒分我,請問有什麼理由要求我修改,如果沒能力改,就花錢來找我上課。

2017年8月27日 星期日

Excel VBA 與 Python 爬「公開資訊觀測站的重大訊息公告」

兩周8小時上完Excel VBA爬蟲入門班課程,在課程最後同學問到如何爬公開資訊觀測站的重大訊息公告,當時誤判用錯 Internet Explorer 方法,造成抓取中文變成亂碼,經過轉碼依舊無法有效(或許還有別的方法,後續再研究),後面改以XMLHttp處理即可順利完成。
Excel VBA雖然可以用不同方法去取得網頁資訊,不過在特定網頁上不是每種方法都可行,需要花時間去試驗,這點與Python只要寫幾行程式碼就能達成相同功能是不同,驗證一句常聽過的話,「方法多不見得有用,有用的方法一種就好」,至於那一種方法好用,在 Excel 中筆者無法給一個標準答案。

請注意:我再次重申,部落格文章的程式碼,是要提供為參考與學習,一旦網頁改版請自行修改,別要求東要求西要我主動修改,你們用我寫東西程式賺錢了、交差了,請問有分我一杯羹嗎?既然賺錢沒分我,請問有什麼理由要求我修改,如果沒能力改,就花錢來找我上課。

以下就來看看相關的Excel VBA與Python程式碼。
公開資訊觀測站的重大訊息公告


Postman畫面。


Excel VBA 抓取網頁資料的程式碼。

Option Explicit

Sub 公開資訊觀測站公告()
    Dim tmp As String
    Dim html As Object, html2 As Object
    Dim htable As Object, htable2 As Object
    Dim i As Integer, j As Integer, year As Integer, month As Integer
    Dim Row As Integer
    Dim url As String
    Dim url2 As String
    Dim stockid As String
    
    stockid = Sheets(1).Range("A2")
    year = Sheets(1).Range("B2")
    
    url = "http://mops.twse.com.tw/mops/web/ajax_t05st01?firstin=1&TYPEK=sii&co_id=" & stockid & "&year=" & year & "&month=&b_date=&e_date="

    Set html = CreateObject("htmlFile")
    Set html2 = CreateObject("htmlFile")
    
    html.body.innerHTML = encodeData(downloadData(url))
    Set htable = html.getElementsByTagName("table")(1)
    
    With ActiveSheet
        Row = .Range("A65536").End(xlUp).Row
        If Row < 5 Then
            Row = 5
        End If
        .Range("A5:F" & Row).Clear
        
        For i = 0 To htable.Rows.Length - 1
            For j = 0 To htable.Rows(i).Cells.Length - 1
                If (htable.Rows(i).Cells.Length - 2) >= j Then
                    .Cells(i + 1 + 3, j + 1) = Trim(htable.Rows(i).Cells(j).innerText)
                End If
            Next
            
            If (htable.Rows.Length - 2) >= i Then
                html2.body.innerHTML = encodeData(downloadData(recombineURL(html.getElementsByTagName("input")(14).onclick)))
                Set htable2 = html2.getElementsByTagName("pre")(1)
                .Cells(i + 2 + 3, j) = Trim(htable2.innerHTML)
            End If
        Next
    End With
    
    Set html = Nothing
    Set htable = Nothing
    Set html2 = Nothing
    Set htable2 = Nothing
End Sub

Function downloadData(url As String)
    Dim oXMLHTTP As Object
    Set oXMLHTTP = CreateObject("Msxml2.XMLHTTP")
    With oXMLHTTP
        .Open "GET", url, False
        .send
        If .Status = 200 Then
            downloadData = oXMLHTTP.ResponseBody
        Else
            MsgBox "無法取得資料"
        End If
    End With
    Set oXMLHTTP = Nothing
End Function

Function encodeData(str As String)
    Dim objStream As Object
    Set objStream = CreateObject("ADODB.Stream")
    With objStream
        .Open
        .WriteText str
        .Position = 0
        .Type = 2
        .Charset = "UTF-8"
        encodeData = .ReadText
        .Close
    End With
    Set objStream = Nothing
End Function

Function recombineURL(str As String)
    Dim tmp As String
    tmp = Replace(Split(Split(str, "{")(1), "}")(0), Chr(10), "")
    tmp = Replace(tmp, "'", "")
    tmp = Replace(tmp, "document.t05st01_fm.seq_no.value", "seq_no")
    tmp = Replace(tmp, ";document.t05st01_fm.spoke_time.value", "&spoke_time")
    tmp = Replace(tmp, ";document.t05st01_fm.spoke_date.value", "&spoke_date")
    tmp = Replace(tmp, ";document.t05st01_fm.co_id.value", "&co_id")
    tmp = Replace(tmp, ";document.t05st01_fm.TYPEK.value", "&TYPEK")
    tmp = "http://mops.twse.com.tw/mops/web/ajax_t05st01?firstin=1&" & Split(tmp, ";")(0) & "&step=2"
    recombineURL = Trim(tmp)
End Function

Sub ClearData()
    Dim Row As Integer
    With Sheets(1)
        Row = .Range("A65536").End(xlUp).Row
        If Row < 5 Then Row = 5
        .Range("A5:F" & Row).Clear
    End With
End Sub
或第二種寫法

Option Explicit

Sub 公開資訊觀測站公告()
    Dim tmp As String
    Dim html As Object, html2 As Object
    Dim htable As Object, htable2 As Object
    Dim i As Integer, j As Integer, year As Integer, month As Integer
    Dim Row As Integer
    Dim url As String
    Dim url2 As String
    Dim stockid As String
    
    stockid = Sheets(1).Range("A2")
    year = Sheets(1).Range("B2")
    
    url = "http://mops.twse.com.tw/mops/web/ajax_t05st01?firstin=1&TYPEK=sii&co_id=" & stockid & "&year=" & year & "&month=&b_date=&e_date="

    Set html = CreateObject("htmlFile")
    Set html2 = CreateObject("htmlFile")
    
    html.body.innerHTML = downloadData(url)
    Set htable = html.getElementsByTagName("table")(1)
    
    With ActiveSheet
        Row = .Range("A65536").End(xlUp).Row
        If Row < 5 Then
            Row = 5
        End If
        .Range("A5:F" & Row).Clear
        
        For i = 0 To htable.Rows.Length - 1
            For j = 0 To htable.Rows(i).Cells.Length - 1
                If (htable.Rows(i).Cells.Length - 2) >= j Then
                    .Cells(i + 1 + 3, j + 1) = Trim(htable.Rows(i).Cells(j).innerText)
                End If
            Next
            
            If (htable.Rows.Length - 2) >= i Then
                html2.body.innerHTML = downloadData(recombineURL(html.getElementsByTagName("input")(14).onclick))
                Set htable2 = html2.getElementsByTagName("pre")(1)
                .Cells(i + 2 + 3, j) = Trim(htable2.innerHTML)
            End If
        Next
    End With
    
    Set html = Nothing
    Set htable = Nothing
    Set html2 = Nothing
    Set htable2 = Nothing
End Sub

Function downloadData(url As String)
    Dim oXMLHTTP As Object
    Set oXMLHTTP = CreateObject("Msxml2.XMLHTTP")
    With oXMLHTTP
        .Open "GET", url, False
        .send
        If .Status = 200 Then
            downloadData = .ResponseText
        Else
            MsgBox "無法取得資料"
        End If
    End With
    Set oXMLHTTP = Nothing
End Function

Function recombineURL(str As String)
    Dim tmp As String
    tmp = Replace(Split(Split(str, "{")(1), "}")(0), Chr(10), "")
    tmp = Replace(tmp, "'", "")
    tmp = Replace(tmp, "document.t05st01_fm.seq_no.value", "seq_no")
    tmp = Replace(tmp, ";document.t05st01_fm.spoke_time.value", "&spoke_time")
    tmp = Replace(tmp, ";document.t05st01_fm.spoke_date.value", "&spoke_date")
    tmp = Replace(tmp, ";document.t05st01_fm.co_id.value", "&co_id")
    tmp = Replace(tmp, ";document.t05st01_fm.TYPEK.value", "&TYPEK")
    tmp = "http://mops.twse.com.tw/mops/web/ajax_t05st01?firstin=1&" & Split(tmp, ";")(0) & "&step=2"
    recombineURL = Trim(tmp)
End Function

Sub ClearData()
    Dim Row As Integer
    With Sheets(1)
        Row = .Range("A65536").End(xlUp).Row
        If Row < 5 Then Row = 5
        .Range("A5:F" & Row).Clear
    End With
End Sub
Excel 檔案畫面。


Python 抓取網頁資料的程式碼。

import requests
from bs4 import BeautifulSoup as bs
import pandas as pd
stock = 2330
year = 106
url= "http://mops.twse.com.tw/mops/web/ajax_t05st01?firstin=1&TYPEK=sii&co_id="+ str(stock) + "&year=" + str(year) + "&month=&b_date=&e_date="
res = requests.get(url)
res.encoding='utf-8'
soup = bs(res.text,"lxml")
tb = soup.select('table')[1]
df = pd.read_html(tb.prettify('utf-8'), encoding= 'utf-8')  
df[0]


兩種語言程式碼的比較。


有興趣Python或Excel VBA,可以參考比較,或隨時注意部落格最新消息公布的Exccl VBA爬蟲入門班開課時間。