问题描述
谁能告诉我如何在经典的 ASP 中解码 base64 编码的图像?图像由 Java org.apache base64 类编码.Java 使用 RFC 2045 进行 base64 解码.
Can any one tell me how to decode a base64 encoded image in classic ASP? The image is encoded by Java org.apache base64 class. The Java uses RFC 2045 for base64 decoding.
推荐答案
您可以使用 Capicom COM 对象.我一直在使用它来反转(base64 编码).这就是我要做的(如果你有一个大循环，你最好让 CreateObject 在循环之外完成，但在简单的情况下应该这样做):
You can use the Capicom COM object. I've been using it to to the reverse (base64 encoding). This is what I would do (if you've got a big loop, you'd better have the CreateObject done outside the loop, but in simple cases this should do it):
Function Base64Decode(encodedString)
Dim caputil : Set caputil = CreateObject("CAPICOM.Utilities")
If len(encodedString) > 0 Then
Base64Decode = caputil.Base64Decode(encodedString)
Else
Base64Decode = ""
End If
Set caputil = Nothing
End Property
参考:http://msdn.microsoft.com/en-us/library/aa388176(v=vs.85).aspx
顺便说一句，capicom.dll 可以从 MS 站点下载:http://www.microsoft.com/downloads/en/details.aspx?FamilyID=860ee43a-a843-462f-abb5-ff88ea5896f6
By the way, capicom.dll can be downloaded from MS site : http://www.microsoft.com/downloads/en/details.aspx?FamilyID=860ee43a-a843-462f-abb5-ff88ea5896f6
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