BinData Node.js Reference Documentation
BinData
Current Version: 11.0.0
Container for binary data. Provides methods for getting, setting, appending, etc. in binary and string encoded formats.
Object Creation
var obj = new chilkat.BinData();
Properties
DebugLogFilePath
· string
If set to a file path, this property logs the LastErrorText of each Chilkat method or property call to the specified file. This logging helps identify the context and history of Chilkat calls leading up to any crash or hang, aiding in debugging.
Enabling the VerboseLogging property provides more detailed information. This property is mainly used for debugging rare instances where a Chilkat method call causes a hang or crash, which should generally not happen.
Possible causes of hangs include:
- A timeout property set to 0, indicating an infinite timeout.
- A hang occurring within an event callback in the application code.
- An internal bug in the Chilkat code causing the hang.
LastErrorHtml
· string, read-only
Provides HTML-formatted information about the last called method or property. If a method call fails or behaves unexpectedly, check this property for details. Note that information is available regardless of the method call's success.
topLastErrorText
· string, read-only
Provides plain text information about the last called method or property. If a method call fails or behaves unexpectedly, check this property for details. Note that information is available regardless of the method call's success.
LastErrorXml
· string, read-only
Provides XML-formatted information about the last called method or property. If a method call fails or behaves unexpectedly, check this property for details. Note that information is available regardless of the method call's success.
topLastMethodSuccess
· boolean
Indicates the success or failure of the most recent method call: true
means success, false
means failure. This property remains unchanged by property setters or getters. This method is present to address challenges in checking for null or Nothing returns in certain programming languages.
NumBytes
· integer, read-only
The number of bytes contained within the object.
topVerboseLogging
· boolean
If set to true
, then the contents of LastErrorText (or LastErrorXml, or LastErrorHtml) may contain more verbose information. The default value is false
. Verbose logging should only be used for debugging. The potentially large quantity of logged information may adversely affect peformance.
Version
· string, read-only
Methods
AppendBd
· Returns Boolean (true for success, false for failure).
· binData BinData
Appends the contents of another BinData to this object.
Returns true for success, false for failure.
topAppendBinary
· Returns Boolean (true for success, false for failure).
· data Buffer
Appends binary data to the current contents, if any.
Returns true for success, false for failure.
topAppendBom
· Returns Boolean (true for success, false for failure).
· charset String
Appends the appropriate BOM (byte order mark), also known as a "preamble", for the given charset. If the charset has no defined BOM, then nothing is appended. An application would typically call this to append the utf-8, utf-16, or utf-32 BOM.
Returns true for success, false for failure.
topAppendByte
· Returns Boolean (true for success, false for failure).
· byteValue Number
Appends a single byte. The byteValue should be a value from 0 to 255.
Returns true for success, false for failure.
topAppendCountedString
· Returns Boolean (true for success, false for failure).
· numCountBytes Number
· bigEndian Boolean
· str String
· charset String
Appends a byte count followed by the string in the desired character encoding, such as "utf-8". The numCountBytes is the size in bytes of the integer to represent the byte count. If 0, then a minimal number of bytes is used. If bigEndian is true
, the byte count is appended in big endian byte ordering, otherwise little-ending byte ordering. The str is the string to be appended. The charset is the character encoding, such as "utf-8", "utf-16", "windows-1252", etc.
Returns true for success, false for failure.
topAppendData
· Returns Boolean (true for success, false for failure).
· data Buffer
· numBytes Number
AppendEncoded
· Returns Boolean (true for success, false for failure).
· encData String
· encoding String
Appends encoded binary data to the current data. The encoding may be "Base64", "modBase64", "base64Url", "Base32", "Base58", "QP" (for quoted-printable), "URL" (for url-encoding), "Hex", or any of the encodings found at Chilkat Binary Encodings List.
Returns true for success, false for failure.
AppendEncodedSb
· Returns Boolean (true for success, false for failure).
· sb StringBuilder
· encoding String
Decodes the contents of sb and appends the decoded bytes to this object. The encoding may be "Base64", "modBase64", "base64Url", "Base32", "Base58", "QP" (for quoted-printable), "URL" (for url-encoding), "Hex", or any of the encodings found at Chilkat Binary Encodings List.
Returns true for success, false for failure.
AppendInt2
· Returns Boolean (true for success, false for failure).
· value Number
· littleEndian Boolean
Appends a 16-bit integer (2 bytes). If littleEndian is true
, then the integer bytes are appended in little-endian byte order, otherwise big-endian byte order is used.
Returns true for success, false for failure.
AppendInt4
· Returns Boolean (true for success, false for failure).
· value Number
· littleEndian Boolean
Appends a 32-bit integer (4 bytes). If littleEndian is true
, then the integer bytes are appended in little-endian byte order, otherwise big-endian byte order is used.
Returns true for success, false for failure.
AppendPadded
· Returns Boolean (true for success, false for failure).
· str String
· charset String
· padWithSpace Boolean
· fieldLen Number
Appends a string to this object, padded to the fieldLen with NULL or SPACE chars. If padWithSpace is true
, then SPACE chars are used and the string is not null-terminated. If fieldLen is false
, then null bytes are used. The charset controls the byte representation to use, such as "utf-8".
Note: This call will always append a total number of bytes equal to fieldLen. If the str is longer than fieldLen, the method returns false
to indicate failure and nothing is appended.
Returns true for success, false for failure.
AppendSb
· Returns Boolean (true for success, false for failure).
· sb StringBuilder
· charset String
Appends the contents of a StringBuilder to this object.
Returns true for success, false for failure.
topAppendString
· Returns Boolean (true for success, false for failure).
· str String
· charset String
Appends a string to this object. (This does not append the BOM. If a BOM is required, the AppendBom method can be called to append the appropriate BOM.)
Returns true for success, false for failure.
ByteSwap
· Does not return anything (returns Undefined).
· size Number
Does either 16-bit or 32-bit byte swapping of the entire contents. If size equals 16, then swaps in 2 bytes (e.g., 0x1234 → 0x3412). If size equals 32, then swaps 4 bytes (e.g., 0x12345678 → 0x78563412)
Returns true for success, false for failure.
topCharsetConvert
· Returns Boolean (true for success, false for failure).
· fromCharset String
· toCharset String
· allOrNone Boolean
This method converts the character encoding of an object's contents from one format to another, such as from Windows-1252 to UTF-8. The allOrNone parameter determines error handling for unrepresentable bytes. If allOrNone is true
, the object's contents remain unchanged when errors occur. If false
, error bytes are discarded. The method returns true
if successful and false
if errors occur.
Returns true for success, false for failure.
topClear
· Returns Boolean (true for success, false for failure).
ContentsEqual
· Returns a Boolean.
· binData BinData
Return true
if the contents of this object equals the contents of binData.
FindString
· Returns a Number.
· str String
· startIdx Number
· charset String
Return the index where the first occurrence of str is found. Return -1 if not found. The startIdx indicates the byte index where the search begins. The charset specifies the byte representation of str that is to be searched. For example, it can be "utf-8", "windows-1252", "ansi", "utf-16", etc.
topGetBinary
· Returns a Buffer.
GetBinaryChunk
· Returns a Buffer.
GetByte
· Returns a Number.
· index Number
Returns the value of the byte at the given index. The returned value is an integer from 0 to 255.
Returns true for success, false for failure.
topGetData
· Returns a Buffer.
GetDataChunk
· Returns a Buffer.
GetEncoded
· Returns a String.
· encoding String
Retrieves the binary data as an encoded string. The encoding may be "Base64", "modBase64", "base64Url", "Base32", "Base58", "QP" (for quoted-printable), "URL" (for url-encoding), "Hex", or any of the encodings found at Chilkat Binary Encodings List.
Returns null
on failure
GetEncodedChunk
· Returns a String.
· offset Number
· numBytes Number
· encoding String
Retrieves a chunk of the binary data and returns it in encoded form. The encoding may be "Base64", "modBase64", "base64Url", "Base32", "Base58", "QP" (for quoted-printable), "URL" (for url-encoding), "Hex", or any of the encodings found at Chilkat Binary Encodings List.
Returns null
on failure
GetEncodedSb
· Returns Boolean (true for success, false for failure).
· encoding String
· sb StringBuilder
Writes the encoded data to a StringBuilder. The encoding may be "Base64", "modBase64", "base64Url", "Base32", "Base58", "QP" (for quoted-printable), "URL" (for url-encoding), "Hex", or any of the encodings found at Chilkat Binary Encodings List.
Returns true for success, false for failure.
GetHash
· Returns a String.
· algorithm String
· encoding String
Returns the hash of the contents of this object. The algorithm is the hash algorithm, and can be "sha1", "sha256", "sha384", "sha512", "sha3-224", "sha3-256", "sha3-384", "sha3-512", "md2", "md5", "ripemd128", "ripemd160","ripemd256", or "ripemd320". The encoding can be "base64", "modBase64", "base64Url", "base32", "base58", "qp" (for quoted-printable), "url" (for url-encoding), "hex", "hexLower", or any of the encodings found at Chilkat Binary Encodings List.
Returns null
on failure
GetInt2
· Returns a Number.
· index Number
· littleEndian Boolean
Returns the value of the 16-bit signed integer stored in big-endian or little-endian byte ordering at the given index.
topGetInt4
· Returns a Number.
· index Number
· littleEndian Boolean
Returns the value of the 32-bit signed integer stored in big-endian or little-endian byte ordering at the given index.
topGetString
· Returns a String.
· charset String
Interprets the bytes according to charset and returns the string. The charset can be "utf-8", "utf-16", "ansi", "iso-8859-*", "windows-125*", or any of the supported character encodings listed in the link below.
Returns null
on failure
GetTextChunk
· Returns a String.
· startIdx Number
· numBytes Number
· charset String
Returns numBytes bytes starting at startIdx. The bytes are interpreted according to charset (for example, "utf-8", "ansi", "utf-16", "windows-1252", etc.)
Returns null
on failure
GetUInt2
· index Number
· littleEndian Boolean
Returns the value of the 16-bit unsigned integer stored in big-endian or little-endian byte ordering at the given index.
topGetUInt4
· index Number
· littleEndian Boolean
Returns the value of the 32-bit unsigned integer stored in big-endian or little-endian byte ordering at the given index.
topIsValidUtf8
· Returns Boolean (true for success, false for failure).
Returns true
if this object contains valid utf-8 byte sequences. Any invalid byte sequence that is not valid utf-8 will cause this function to return false
.
Returns true for success, false for failure.
topLoadBinary
· Returns Boolean (true for success, false for failure).
· data Buffer
Loads binary data and replaces the current contents, if any.
Returns true for success, false for failure.
topLoadEncoded
· Returns Boolean (true for success, false for failure).
· encData String
· encoding String
Loads binary data from an encoded string, replacing the current contents, if any. The encoding may be "Base64", "modBase64", "base64Url", "Base32", "Base58", "QP" (for quoted-printable), "URL" (for url-encoding), "Hex", or any of the encodings found at Chilkat Binary Encodings List.
Returns true for success, false for failure.
topLoadFile
· Returns Boolean (true for success, false for failure).
· path String
RemoveByteVal
· Does not return anything (returns Undefined).
· value Number
Removes bytes having a specified value (0-255). For example, to remove all null bytes, pass 0 in value.
topRemoveChunk
· Returns a Boolean.
· offset Number
· numBytes Number
SecureClear
· Returns Boolean (true for success, false for failure).
Securely clears the contents by writing 0 bytes to the memory prior to deallocating the internal memory.
Returns true for success, false for failure.
topWriteAppendFile
· Returns Boolean (true for success, false for failure).
· path String
WriteFile
· Returns Boolean (true for success, false for failure).
· path String