base64 (stdlib v3.15.2)
Provides base64 encode and decode, see RFC 2045.
Link to this section Summary
Types
Base 64 Encoding alphabet, see RFC 4648.
Base 64 encoded binary.
Base 64 encoded string.
Arbitrary sequences of octets.
Functions
Encodes a plain ASCII string into base64. The result is 33% larger than the data.
Link to this section Types
Link to this type
-type base64_alphabet() :: term().
Specs
base64_alphabet() :: $A..$Z | $a..$z | $0..$9 | $+ | $/ | $=.
Base 64 Encoding alphabet, see RFC 4648.
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-type base64_binary() :: term().
Specs
base64_binary() :: binary().
Base 64 encoded binary.
Link to this type
-type base64_string() :: term().
Specs
base64_string() :: [base64_alphabet()].
Base 64 encoded string.
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-type byte_string() :: term().
Specs
byte_string() :: [byte()].
Arbitrary sequences of octets.
Link to this section Functions
Link to this function
decode/1
Specs
decode(Base64) -> Data when Base64 :: base64_string() | base64_binary(), Data :: binary().
Decodes a base64-encoded string to plain ASCII. See RFC 4648.
mime_decode/1 and mime_decode_to_string/1 strip away illegal characters, while decode/1 and decode_to_string/1 only strip away whitespace characters.
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decode_to_string/1
Specs
decode_to_string(Base64) -> DataString
when Base64 :: base64_string() | base64_binary(), DataString :: byte_string().
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encode/1
Specs
encode(Data) -> Base64 when Data :: byte_string() | binary(), Base64 :: base64_binary().
Encodes a plain ASCII string into base64. The result is 33% larger than the data.
Link to this function
encode_to_string/1
Specs
encode_to_string(Data) -> Base64String
when Data :: byte_string() | binary(), Base64String :: base64_string().
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mime_decode/1
Specs
mime_decode(Base64) -> Data when Base64 :: base64_string() | base64_binary(), Data :: binary().
Link to this function
mime_decode_to_string/1
Specs
mime_decode_to_string(Base64) -> DataString
when
Base64 :: base64_string() | base64_binary(),
DataString :: byte_string().