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In binary, we have 2 distinct symbols. Well, in base-64, we have 64 distinct symbols. So, it really is just the number system, in exactly the same way as those other number systems. Now, WHICH 64 symbols to use is a completely different matter, and in some cases, you need to use a different set of 64 symbols than in other cases. –
Ask yourself do you really need to do this? Remember base64 is primarily intended for representing binary data in ASCII, for storing in a char field in a database or sending via email (where new lines could be injected).
It looks like it's essential to call the decode() function to make use of actual string data even after calling base64.b64decode over the base64 encoded string.
Isn't encoding taking the text TO base64 and decoding taking base64 BACK to text? You seem be mixing them up here. When I decode using this online decoder I get:
I have found numerous ways to base64 encode whole files using the command-line on Windows, but I can't seem to find a simple way to batch encode just a "string" using a command-line utility.
Encoding "Mary had" to Base 64. In this example we are using a simple text string ("Mary had") but the principle holds no matter what the data is (e.g. graphics file). To convert each 24 bits of input data to 32 bits of output, Base 64 encoding splits the 24 bits into 4 chunks of 6 bits.
This answer is wrong because given stringToBeChecked="some plain text" then it sets boolean isBase64=true even though it's not a Base64 encoded value. Read the source for commons-codec-1.4 Base64.isArrayByteBase64() it only checks that each character in the string is valid to be considered for Base64 encoding and allows white space.
the usual windows way to generate a base 64 string is. Make any file (here simple text but can be PDF, docX or whatever.) echo Hello World!>input.ext Convert to base64. certutil -encodehex -f "input.ext" "output.txt" 0x40000001 1>nul to see the result use. type output.txt SGVsbG8gV29ybGQhDQo=
By using nvarchar, the binary representation of the text which is encoded in BASE64 uses UTF-16. Similarly, when decoding the BASE64, it assumes that the binary data decoded from the BASE64 is in UTF-16 format, which won't be the default for most things created in the web world.
The accepted answer previously contained new Buffer(), which is considered a security issue in Node.js versions greater than 6 (although it seems likely for this use case that the input can always be coerced to a string).