Functions for encoding and decoding the InfoPath base64 format.

{
    name: string,           // the file's name
    bytes: string,          // the file's bytes, as a Uint8Array
}

{
    fileName: string,        // the file's name
    fileExtension: string,   // the file's extension, including the initial period
    fileSize: number,        // the actual file's size
    base64: string,          // the file's data in base64 format
    fileExtensionWithoutPeriod,  // the extension without a period
}

decodeBase64Attachment(attachmentBase64: string): AttachmentValues

Decodes the given base64 attachment value to determine its bytes and name.

If the provided base64 value is not an InfoPath attachment, returns the given base64 value's bytes and attempts to determine a placeholder filename based on the file's first new bytes.

isAttachment(base64: string): boolean

Returns true if the provided base64 value is an InfoPath attachment.

encodeBase64Attachment(fileBytes: UintArray, name: string): string

Converts the given bytes and file name to an InfoPath base64 attachment and returns the base64 value.

getAttachmentValues(attachmentBase64: string): DetailedAttachmentValues

Decodes the given base64 attachment returns an object containing a base64 string for the file's data, file name information, and size.

As with decodeBase64Attachment(), if the provided base64 value is not an InfoPath attachent, a filename will be auto-determined and used.

arrayBufferToBase64(buffer: ArrayBuffer): string

Converts the given array buffer to a base64 string.

base64Array(base64: string, blockSize?: number): Uint8Array

Converts the given base64 value to a byte array, processing with blocks of the given size. If blockSize is unspecified, a value will be auto-determined.

base64ToText(base64: string): string

Converts the given base64 data to a text string using UTF-8 encoding.

byteArrayToBase64(bytes: Uint8Array): string

Converts the given byte array to a base64 string.

stringToUtf8Bytes(text: string): Uint8Array

Converts a text string to a byte array using UTF-8 encoding.