javascript - 如何将二进制字符串转换为base64

Question

我有以下格式的二进制字符串:

%PDF-1.3
%âãÏÓ
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hÞbbd``b`² ±H0§ 6G ñå#Ã4,#¹ÄÆ_L¤ð
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%%EOF

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hÞb```a``üÏÜ6¨¬$ËѬ,ÆÅ
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<</Metadata 1 0 R/Pages 5 0 R/Type/Catalog>>
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<</Contents 11 0 R/CropBox[0 0 595 842]/MediaBox[0 0 595 842]/Parent 5 0 R/Resources 14 0 R/Rotate 0/Type/Page>>
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<x:xmpmeta xmlns:x="adobe:ns:meta/" x:xmptk="Adobe XMP Core 4.2.1-c043 52.372728, 2009/01/18-15:08:04        ">
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         <dc:creator>
            <rdf:Seq>
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            </rdf:Seq>
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         <dc:title>
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      <rdf:Description rdf:about=""
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         <xmp:CreateDate>2000-06-29T10:21:08+11:00</xmp:CreateDate>
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hÞbb```bä=ÂÄÀ?"0¡!0&0ñ±$Í`*Y
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%%EOF

我想将其转换为base64。但是我无法使用 btoa(BINARYSTRING) 进行转换，不知道为什么。有什么办法可以转换它吗？我尝试了许多不同的方法，包括 btoa(unescape(BINARYSTRING)) 和 btoa(unescape(encodeURIComponent(BINARYSTRING)))。两者似乎都没有返回编码的 Base64 结果。

Answer 1

However i am not able to use btoa(BINARYSTRING) to convert, not sure why. Is there any way i could convert it

是的，这是正确的编码方式。确保typeof BINARSTRING === 'string'。如果没有调用toString就可以了。