base64Decode
base64Decode ( toEncode : blob, string , encoded : blob, string {, *} )
| Parameter | Type | Description | |
|---|---|---|---|
| toEncode | blob, string | → | Value to encode |
| ← | Encoded value (if encoded parameter omitted) | ||
| encoded | blob, string | ← | Encoded value |
| * | → | Encode in Base64URL format |
Description
The base64Decode command decodes the string or blob value coded in Base64 or Base64URL format passed in the toDecode parameter. For more information on Base64 and Base64URL formats, please refer to the base64Encode command description.
Pass in toDecode the Base64 or Base64URL encoded string or blob value to decode.
If you pass the decoded parameter, the command decodes the contents of toDecode in the decoded parameter -- the toDecode parameter is left untouched. If you omit the decoded parameter, the command directly modifies the contents of the toDecode parameter.
If a string variable is passed to receive what is decoded by the command, it receives the decoded bytes interpreted as utf-8.
By default if the * parameter is omitted, the command uses a Base64 decoding. If you pass the * parameter, the command uses a Base64URL decoding.
If toDecode contains an invalid base64 contents, an empty string or blob value is returned.
Example
This example lets you transfer a picture via a blob:
var sourceBlob, targetBlob : blob
var mypicture : picture
var base64Text : string
mypicture = ds.People.get(1).photo
pictureToBlob(mypicture,sourceBlob,".JPG")
base64Decode(sourceBlob,base64Text) //Encoding of string
// the binary is now available as character strings in base64Text
base64Decode(base64Text,targetBlob) //Decoding of string
// the binary encoded in base 64 is now available as a blob in blobTarget