const elements = token.split('.') Ĭonst payload = JSON. Then, I decode the JWT payload and then parse it into JSON object. To use this function to decode the Base64URL string, I use JWT token as an example. The return value is in the form of a string containing only characters in the range from U+0000 to U+00FF, each representing a binary byte with values 0x00 to 0xFF. ![]() If (len > L + 2 & ((s.charAt(L+2) != PADCHAR) || !padding)) code(input) This function takes a base64-encoded string (the input parameter) and decodes it. This needs to be converted into a textual string. The result of el.nodeTypedValue will be an array of bytes containing the decoded base-64 data. Many browsers already have base64 encoding/decoding functionality, but it is for text data, not all-. You have to carry out some additional steps to get the textual representation of the decoded base-64. I wrote a function that can decode both Base64 and Base64URL directly without any other dependency. base64-js does basic base64 encoding/decoding in pure JS. ![]() I think the most efficient way of doing Base64/Base64URL decoding is to decode directly in a function instead of changing Base64URL into Base64 and then decoding it.
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