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Script function


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Takes a base-64 encoded string and decodes it.


VARIANT Base64Decode(BSTR Text);

View list of data type meanings


Takes a base-64 encoded string (eg. "TmljayBHYW1tb24=") and decodes it. The string may contain space characters (including carriage-return/newline) which will be removed.

The string to be decoded must contain valid base-64 characters, and must be a multiple of 4 characters long (once spaces are removed), or a NULL variant will be returned.

The valid base-64 characters are:


Also, '=' is used as a padding character if the original text to be encoded was not exactly a multiple of 3 characters long.

Because of the way strings are stored this will not work with strings which have nulls in them (hex 00), however see below for a work-around for Lua.

Available in MUSHclient version 3.22 onwards.

VBscript example

world.note world.Base64Decode ("TmljayBHYW1tb24=")

Jscript example

world.note (world.Base64Decode ("TmljayBHYW1tb24="));

PerlScript example

$world->note ($world->Base64Decode ("TmljayBHYW1tb24="));

Python example

world.note (world.Base64Decode ("TmljayBHYW1tb24="))

Lua example

Note (Base64Decode ("TmljayBHYW1tb24="))

-- or, as described in the notes:

Note (utils.base64decode ("TmljayBHYW1tb24="))

Lua notes

In MUSHclient version 3.57 onwards you can also use 

decoded_string = utils.base64decode (s)

This works the same as described above, however it will correctly handle strings with the null (hex 00) character in them.

This function works a bit differently if it encounters "bad" data:

* Characters not in the set shown above are silently ignored

* If the source string is not a multiple of four characters, the string is still processed, however up to the last 3 bytes will not be returned.

Return value

The decoded string, or a NULL variant if the input string was not a multiple of 4 characters in length, once spaces were removed, or did not contain the valid base-64 characters listed above.

Note that due to the way strings are represented internally, it is not possible for the decoded string to contain the NULL character (hex 0x00) and be returned correctly.

See Also ...




(AddFont) Adds a custom font for use by MUSHclient
(Base64Encode) Encodes a string using base-64 encoding.
(BlendPixel) Blends a single pixel with another, using a specified blending mode
(ChangeDir) Changes the MUSHclient working directory
(CreateGUID) Creates a GUID - Global Unique Identifier
(EditDistance) Returns the Levenshtein Edit Distance between two words
(ErrorDesc) Converts a MUSHclient script error code into an human-readable description
(ExportXML) Exports a world item in XML format
(FilterPixel) Performs a filtering operation on one pixel
(FixupEscapeSequences) Converts "escape sequences" like \t to their equivalent codes.
(FixupHTML) Fixes up text for writing as HTML
(FlashIcon) Flashes the MUSHclient icon on the Windows taskbar
(GenerateName) Generates a random character name
(GetClipboard) Gets the clipboard contents
(GetScriptTime) Returns the amount of time spent in script routines
(GetSoundStatus) Gets the status of a sound started by PlaySound
(GetUniqueID) Creates a unique ID for general use, or for making Plugin IDs
(GetUniqueNumber) Returns a unique number
(Hash) Produces a hash (checksum) of a specified piece of text
(Help) Shows help for a script function, or a list of functions
(ImportXML) Imports configuration data in XML format
(Menu) Creates a pop-up menu inside the command window
(Metaphone) Returns the metaphone code for the supplied word
(MoveMainWindow) Move and resize the main MUSHclient window
(MoveWorldWindow) Move and resize a world window
(MoveWorldWindowX) Move and resize a specific world window
(MtRand) Returns pseudo-random number using the Mersenne Twister algorithm
(MtSrand) Seed the Mersenne Twister pseudo-random number generator
(PlaySound) Plays a sound using DirectSound
(ReadNamesFile) Loads in a file for generating character names
(Replace) Replaces one substring with another
(SetBackgroundColour) Sets a background colour for the output window
(SetBackgroundImage) Sets a background image for the output window
(SetClipboard) Sets the clipboard contents
(SetForegroundImage) Sets a foreground image for the output window
(SetMainTitle) Sets the main output window title
(SetSelection) Sets a selection range in the output window
(SetStatus) Sets the status line text
(SetTitle) Sets the world window title
(SetToolBarPosition) Sets the position of the game toolbars on the screen.
(SetUnseenLines) Sets the number of "unseen lines" for this world
(ShiftTabCompleteItem) Adds an item to the list shown for Shift+Tab completion
(Simulate) Simulate input from the MUD, for debugging purposes
(Sound) Plays a sound
(StopSound) Stop playing a sound started by PlaySound
(StripANSI) Strips ANSI colour sequences from a string
(Trace) Trace mode property
(TraceOut) Outputs the supplied message to the world Trace
(TranslateDebug) Sends a debugging message to the localizing translator script
(TranslateGerman) Translate German umluat sequences
(Transparency) Sets the transparency of the main MUSHclient window under Windows XP
(Trim) Trims leading and trailing spaces from a string

(Help topic: function=Base64Decode)

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