Question

此VBA脚本使用A列作为文件名，B作为图像URL，并添加“.jpg”作为扩展名。

问题是许多文件不是jpg格式，所以最好考虑它们的扩展名未知。

是否可以调整脚本以便在保存图像之前获取真实的文件扩展名并将其添加到文件名而不是用户定义的“.jpg”？

剧本

Option Explicit
'~~> This macro downloads images from urls. Column A=image title, Column B=image URL.
Private Declare Function URLDownloadToFile Lib "urlmon" _
Alias "URLDownloadToFileA" (ByVal pCaller As Long, _
ByVal szURL As String, ByVal szFileName As String, _
ByVal dwReserved As Long, ByVal lpfnCB As Long) As Long

Dim Ret As Long

'~~> This is where the images will be saved. Change as applicable
Const FolderName As String = "C:\Users\plus\Desktop\INPUT\"

Sub DOWNLOAD_image_XLS()
'~~> This is where text is divided into 2 columns right down the "|" delimiter
    Columns("A:A").Select
    Selection.TextToColumns Destination:=Range("A1") _
                      , DataType:=xlDelimited _
                      , Other:=True _
                      , OtherChar:="|"
    Dim ws As Worksheet
    Dim LastRow As Long, i As Long
    Dim strPath As String

    Set ws = ActiveSheet

    LastRow = ws.Range("A" & Rows.Count).End(xlUp).Row

    For i = 2 To LastRow '<~~ 2 because row 1 has headers
        strPath = FolderName & ws.Range("A" & i).Value & ".jpg"

        Ret = URLDownloadToFile(0, ws.Range("B" & i).Value, strPath, 0, 0)

        If Ret = 0 Then
            ws.Range("C" & i).Value = "OK"
        Else
            ws.Range("C" & i).Value = "Failed!"
        End If
    Next i
    End Sub

Answer 1

一种方法是从响应中解析Content-Type：

Sub DownloadLink()

  Const imageLink = "http://i.stack.imgur.com/9w2PY.png?s=32"
  Const filePath = "C:\Temp\myimage"

  Dim req As Object, content() As Byte, extension$

  ' send the request
  Set req = CreateObject("Msxml2.ServerXMLHTTP.6.0")
  req.Open "GET", imageLink, False
  req.Send

  ' get the extension and data
  extension = "." & Split(req.getResponseHeader("Content-Type"), "/")(1)
  content = req.responseBody

  ' write the file
  Open filePath & extension For Binary Access Write As #1
      Put #1, 1, content
  Close #1

End Sub

VBA：没有扩展名的下载文件，获取扩展名并将其添加到文件名

1 个答案: