This query function performs Base64 decoding of a field. The decoded value
is subsequently decoded as binary representation of a string according to
charset parameter, which defaults to UTF-8. To
work with actual binary data, use ISO-8859-1 character set.
|string||optional||Name of the field in which to store the decoded value.|
|string||optional|| The character set to use when transforming bytes to string. Validated type is |
|string||required||The field on which to decode Base64 values.|
The parameter name for
field can be omitted; the following forms are equivalent:
Behavior on Invalid Encoding
An input field that does not contain a valid Base64 encoding may result in the following behavior:
Characters outside the base encoding alphabet are ignored.
If the base encoding is invalid, the output field is not created.
When decoding to a code point that is invalid with respect to the selected charset, the invalid code point is replaced with a placeholder character.
Decode the Base64 value in encoded and stores it in decoded:
decoded := base64Decode(encoded)