Cors错误..跨域请求被阻止

Question

我正在基于python-flask的API上尝试XHR GET请求，并收到此错误：

Sub copyNonBlankData()
Dim erow As Long, lastrow As Long, i As Long
Dim ws As Worksheet
Set ws = ActiveWorkbook.Worksheets("Sheet1") 'Sheet name
Dim ws2 As Worksheet
Set ws2 = ActiveWorkbook.Worksheets("Sheet2") 'Sheet name

lastrow = ws.Cells(Rows.Count, 1).End(xlUp).Row
erow = ws2.Cells(Rows.Count, 1).End(xlUp).Offset(1, 0).Row

For i = 4 To lastrow
    If ws.Cells(i, 1) <> "" Then
        ws.Range(ws.Cells(i, 1), ws.Cells(i, 1)).Copy 'Copy Serial number
        ws2.Range(ws2.Cells(erow, 1), ws2.Cells(erow, 1)).PasteSpecial xlPasteAll 'Paste serial
        ws.Range(ws.Cells(i, 2), ws.Cells(i, 2)).Copy 'Copy date
        ws2.Range(ws2.Cells(erow, 3), ws2.Cells(erow, 3)).PasteSpecial xlPasteAll 'Paste serial
        ws.Range(ws.Cells(i, 3), ws.Cells(i, 4)).Copy 'Copy values
        ws2.Range(ws2.Cells(erow, 5), ws2.Cells(erow, 6)).PasteSpecial xlPasteAll 'Paste values
        ws2.Range(ws2.Cells(erow, 4), ws2.Cells(erow, 4)).Interior.Color = RGB(255, 242, 204) 'Fill Colour in 3rd column
        ws2.Range(ws2.Cells(erow, 2), ws2.Cells(erow, 2)).Borders(xlEdgeBottom).LineStyle = xlContinuous 'Add borders to 2nd column
        ws2.Range(ws2.Cells(erow, 4), ws2.Cells(erow, 4)).Borders(xlEdgeBottom).LineStyle = xlContinuous 'Add borders to 4th column
        erow = erow + 1
    End If
Next i
Application.CutCopyMode = False
End Sub

服务器代码：

Sub copyNonBlankData()
Dim erow As Long, lastrow As Long, i As Long
Dim ws As Worksheet
Set ws = ActiveWorkbook.Worksheets("Sheet1") 'Sheet name
Dim ws2 As Worksheet
Set ws2 = ActiveWorkbook.Worksheets("Sheet2") 'Sheet name

Application.ScreenUpdating = False
Application.Calculation = xlCalculationManual
Application.DisplayAlerts = False

lastrow = ws.Cells(Rows.Count, 1).End(xlUp).Row
erow = ws2.Cells(Rows.Count, 1).End(xlUp).Offset(1, 0).Row

For i = 4 To lastrow
    If ws.Cells(i, 1) <> "" Then
        With ws.Range(ws.Cells(i, 1), ws.Cells(i, 1))
            ws2.Range(ws2.Cells(erow, 1), ws2.Cells(erow, 1)).Value = .Value
        End With
        With ws.Range(ws.Cells(i, 2), ws.Cells(i, 2))
            ws2.Range(ws2.Cells(erow, 3), ws2.Cells(erow, 3)).Value = .Value
        End With
        With ws.Range(ws.Cells(i, 3), ws.Cells(i, 4))
            ws2.Range(ws2.Cells(erow, 5), ws2.Cells(erow, 6)).Value = .Value
            ws2.Range(ws2.Cells(erow, 3), ws2.Cells(erow, 7)).Interior.Color = RGB(255, 242, 204) 'Fill Colour in 3rd column
            ws2.Range(ws2.Cells(erow, 1), ws2.Cells(erow, 7)).Borders.LineStyle = xlContinuous 'Add borders to 2nd column
        End With
        erow = erow + 1
    End If
Next i
Application.CutCopyMode = False

Application.ScreenUpdating = True
Application.Calculation = xlCalculationAutomatic
Application.DisplayAlerts = True

End Sub

响应头仍然没有获得所需的头。

Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at http://..... (Reason: CORS header ‘Access-Control-Allow-Origin’ missing).

我在这里想念什么...