ZipEntry Node.js Reference Documentation

ZipEntry

Represents a single file or directory entry within a Chilkat Zip object. A zip entry can be one of 5 types (see the description of the EntryType property below).

Object Creation

var obj = new chilkat.ZipEntry();

Properties

Comment

· string

The comment stored within the Zip for this entry.

CompressedLength

· integer, read-only

The size in bytes of this entry's file data when compression is applied

CompressedLength64

· 64-bit integer, read-only

The size in bytes of this entry's file data when compression is applied

CompressionLevel

· integer

The compression level. 0 = no compression, while 9 = maximum compression. The default is 6.

CompressionMethod

· integer

Set to 0 for no compression, or 8 for the Deflate algorithm. The Deflate algorithm is the default algorithm of the most popular Zip utility programs, such as WinZip

Crc

· integer, read-only

The CRC for the zip entry. For AES encrypted entries, the CRC value will be 0. (See http://www.winzip.com/aes_info.htm#CRC )

DebugLogFilePath

· string

If set to a file path, causes each Chilkat method or property call to automatically append it's LastErrorText to the specified log file. The information is appended such that if a hang or crash occurs, it is possible to see the context in which the problem occurred, as well as a history of all Chilkat calls up to the point of the problem. The VerboseLogging property can be set to provide more detailed information.

This property is typically used for debugging the rare cases where a Chilkat method call hangs or generates an exception that halts program execution (i.e. crashes). A hang or crash should generally never happen. The typical causes of a hang are:

  1. a timeout related property was set to 0 to explicitly indicate that an infinite timeout is desired,
  2. the hang is actually a hang within an event callback (i.e. it is a hang within the application code), or
  3. there is an internal problem (bug) in the Chilkat code that causes the hang.

EncryptionKeyLen

· integer, read-only
Introduced in version 9.5.0.69

If this entry is AES encrypted, then this property contains the AES key length (128, 192, or 256). If the entry is not AES encrypted, then the value is 0.

EntryID

· integer, read-only

The unique ID assigned by Zip.NET while the object is instantiated in memory.

EntryType

· integer, read-only

Indicates the origin of the entry. There are three possible values:

  1. Mapped Entry: An entry in an existing Zip file.
  2. File Entry: A file not yet in memory, but referenced. These entries are added by calling AppendFiles, AppendFilesEx, AppendOneFileOrDir, etc.
  3. Data Entry: An entry containing uncompressed data from memory. These entries are added by calling AppendData, AppendString, etc.
  4. Null Entry: An entry that no longer exists in the .zip.
  5. New Directory Entry: A directory entry added by calling AppendNewDir.
When the zip is written by calling WriteZip or WriteToMemory, all of the zip entries are transformed into mapped entries. They become entries that contain the compressed data within the .zip that was just created. (The WriteZip method call effectively writes the zip and then opens it, replacing all of the existing entries with mapped entries.)

FileDateTimeStr

· string

The local last-modified date/time in RFC822 string format.

FileName

· string

The file name of the Zip entry.

Set Entry Filepath (in output Zip) when Zipping

FileNameHex

· string, read-only

A string containing the hex encoded raw filename bytes found in the Zip entry.

IsAesEncrypted

· boolean, read-only
Introduced in version 9.5.0.69

true if the entry is AES encrypted. This property can only be true for entries already contained in a .zip (i.e. entries obtained from a zip archive that was opened via OpenZip, OpenBd, OpenFromMemory, etc.) The property is false if the entry contained in the zip is not AES encrypted.

IsDirectory

· boolean, read-only

True if the Zip entry is a directory, false if it is a file.

LastErrorHtml

· string, read-only

Provides information in HTML format about the last method/property called. If a method call returns a value indicating failure, or behaves unexpectedly, examine this property to get more information.

LastErrorText

· string, read-only

Provides information in plain-text format about the last method/property called. If a method call returns a value indicating failure, or behaves unexpectedly, examine this property to get more information.

Concept of LastErrorText

LastErrorText Standard Information

LastErrorXml

· string, read-only

Provides information in XML format about the last method/property called. If a method call returns a value indicating failure, or behaves unexpectedly, examine this property to get more information.

LastMethodSuccess

· boolean
Introduced in version 9.5.0.52

Indicate whether the last method call succeeded or failed. A value of true indicates success, a value of false indicates failure. This property is automatically set for method calls. It is not modified by property accesses. The property is automatically set to indicate success for the following types of method calls:

  • Any method that returns a string.
  • Any method returning a Chilkat object, binary bytes, or a date/time.
  • Any method returning a standard boolean status value where success = true and failure = false.
  • Any method returning an integer where failure is defined by a return value less than zero.

Note: Methods that do not fit the above requirements will always set this property equal to true. For example, a method that returns no value (such as a "void" in C++) will technically always succeed.

TextFlag

· boolean

Controls whether the "text flag" of the internal file attributes for this entry within the zip is set. This is a bit flag that indicates whether the file contents are text or binary. It is for informational use and it is not imperative that this bit flag is accurately set. The ability to set this bit flag is only provided to satisfy certain cases where another application might be sensitive to the flag.

UncompressedLength

· integer, read-only

The size in bytes of this entry's file data when uncompressed.

UncompressedLength64

· 64-bit integer, read-only

The size in bytes of this entry's file data when uncompressed.

VerboseLogging

· 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

Version of the component/library, such as "9.5.0.63"

Methods

var status = AppendData(inData);

· Returns Boolean (true for success, false for failure).
· inData Buffer

Appends binary data to the zip entry's file contents.

Returns true for success, false for failure.

var ret_task = AppendDataAsync(inData);

· Returns a Task
· inData Buffer

Creates an asynchronous task to call the AppendData method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Returns null on failure

How to Run a Node.js Asynchronous Task

var status = AppendString(strContent, charset);

· Returns Boolean (true for success, false for failure).
· strContent String
· charset String

Appends text data to the zip entry's file contents. The text is appended using the character encoding specified by the charset, which can be "utf-8", "ansi", etc.

Returns true for success, false for failure.

var ret_task = AppendStringAsync(strContent, charset);

· Returns a Task
· strContent String
· charset String

Creates an asynchronous task to call the AppendString method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Returns null on failure

How to Run a Node.js Asynchronous Task

var retBuf = Copy();

· Returns a Buffer.

Returns the compressed data as a byte array.

Note: The Copy method can only be called if the zip entry already contains compressed data (i.e. it is a "mapped entry"). This is the case when an existing .zip is opened (from memory or from a file), or after the .zip has been written (by calling WriteZip or WriteToMemory). If a zip entry is created via AppendData, AppendFiles, etc., then it does not yet contain compressed data. When the zip is written, each entry becomes a "mapped entry" (The value of the EntryType property becomes 0.)

Returns null on failure

var retStr = CopyToBase64();

· Returns a String.

Returns the compressed data as a Base64-encoded string. It is only possible to retrieve the compressed data from a pre-existing .zip that has been opened or after writing the .zip but not closing it.

Note: The CopyToBase64 method can only be called if the zip entry already contains compressed data (i.e. it is a "mapped entry").

Returns null on failure

var retStr = CopyToHex();

· Returns a String.

Returns the compressed data as a hexidecimal encoded string. It is only possible to retrieve the compressed data from a pre-existing .zip that has been opened or after writing the .zip but not closing it.

Note: The CopyToBase64 method can only be called if the zip entry already contains compressed data (i.e. it is a "mapped entry").

Returns null on failure

var status = Extract(dirPath);

· Returns Boolean (true for success, false for failure).
· dirPath String

Unzips this entry into the specified base directory. The file is unzipped to the subdirectory according to the relative path stored with the entry in the Zip. Use ExtractInto to unzip into a specific directory regardless of the path information stored in the Zip.

Returns true for success, false for failure.

var ret_task = ExtractAsync(dirPath);

· Returns a Task
· dirPath String

Creates an asynchronous task to call the Extract method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Returns null on failure

How to Run a Node.js Asynchronous Task

var status = ExtractInto(dirPath);

· Returns Boolean (true for success, false for failure).
· dirPath String

Unzip a file into a specific directory

Returns true for success, false for failure.

var ret_task = ExtractIntoAsync(dirPath);

· Returns a Task
· dirPath String

Creates an asynchronous task to call the ExtractInto method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Returns null on failure

How to Run a Node.js Asynchronous Task

var ret_ckDateTime = GetDt();

· Returns a CkDateTime

Returns the last-modified date/time of this zip entry.

Returns null on failure

var retBuf = Inflate();

· Returns a Buffer.

Inflate a file within a Zip directly into memory.

Returns null on failure

var ret_task = InflateAsync();

· Returns a Task

Creates an asynchronous task to call the Inflate method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Returns null on failure

How to Run a Node.js Asynchronous Task

var ret_zipEntry = NextEntry();

· Returns a ZipEntry

Return the next entry (file or directory) within the Zip

Returns null on failure

var status = NextMatchingEntry(matchStr);

· Returns Boolean (true for success, false for failure).
· matchStr String
Introduced in version 9.5.0.50

Returns the next entry having a filename matching the matchStr. The "*" characters matches 0 or more of any character. The full filename, including path, is used when matching against the pattern.

Returns null on failure

Iterate over Matching Filenames

var status = ReplaceData(inData);

· Returns Boolean (true for success, false for failure).
· inData Buffer

Replaces the zip entry's existing contents with new data.

Returns true for success, false for failure.

var status = ReplaceString(strContent, charset);

· Returns Boolean (true for success, false for failure).
· strContent String
· charset String

Replaces the zip entry's existing contents with new text data. The text will be stored using the character encoding as specified by charset, which can be "utf-8", "ansi", etc.

Returns true for success, false for failure.

Replace/Update a FIle in a .zip

var status = SaveLastError(path);

· Returns Boolean (true for success, false for failure).
· path String

Saves the last-error information (the contents of LastErrorXml) to an XML formatted file.

Returns true for success, false for failure.

SetDt(dt);

· Does not return anything (returns Undefined).
· dtvoid

Sets the last-modified date/time for this zip entry.

var status = UnzipToBd(binData);

· Returns Boolean (true for success, false for failure).
· binDatabool
Introduced in version 9.5.0.67

Unzips the entry contents into the binData.

Returns true for success, false for failure.

var ret_task = UnzipToBdAsync(binData);

· Returns a Task
· binDataTask
Introduced in version 9.5.0.67

Creates an asynchronous task to call the UnzipToBd method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Returns null on failure

How to Run a Node.js Asynchronous Task

var status = UnzipToSb(lineEndingBehavior, srcCharset, sb);

· Returns Boolean (true for success, false for failure).
· lineEndingBehavior Number
· srcCharset String
· sbbool
Introduced in version 9.5.0.67

Unzips a text file to the sb. The contents of sb are appended with the unzipped file. The lineEndingBehavior is as follows:

0 = leave unchanged.
1 = convert all to bare LF's
2 = convert all to CRLF's

The srcCharset tells the component how to interpret the bytes of the uncompressed file -- i.e. as utf-8, utf-16, windows-1252, etc.

Returns true for success, false for failure.

var ret_task = UnzipToSbAsync(lineEndingBehavior, srcCharset, sb);

· Returns a Task
· lineEndingBehavior Number
· srcCharset String
· sbTask
Introduced in version 9.5.0.67

Creates an asynchronous task to call the UnzipToSb method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Returns null on failure

How to Run a Node.js Asynchronous Task

var status = UnzipToStream(toStream);

· Returns Boolean (true for success, false for failure).
· toStreambool
Introduced in version 9.5.0.67

Unzips a file within a Zip to a stream. If called synchronously, the toStream must have a sink, such as a file or another stream object. If called asynchronously, then the foreground thread can read the stream.

Returns true for success, false for failure.

Unzip Binary File to Stream

var ret_task = UnzipToStreamAsync(toStream);

· Returns a Task
· toStreamTask
Introduced in version 9.5.0.67

Creates an asynchronous task to call the UnzipToStream method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Returns null on failure

Unzip One File to a Stream

var retStr = UnzipToString(lineEndingBehavior, srcCharset);

· Returns a String.
· lineEndingBehavior Number
· srcCharset String

Inflate and return the uncompressed data as a string The lineEndingBehavior is as follows:

0 = leave unchanged.
1 = convert all to bare LF's
2 = convert all to CRLF's

The srcCharset tells the component how to interpret the bytes of the uncompressed file -- i.e. as utf-8, utf-16, windows-1252, etc.

Returns null on failure

Iterate over Matching Filenames

Download a Zip from a URL and OpenFromMemory. (No .zip fie is created)

var ret_task = UnzipToStringAsync(lineEndingBehavior, srcCharset);

· Returns a Task
· lineEndingBehavior Number
· srcCharset String

Creates an asynchronous task to call the UnzipToString method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Returns null on failure

How to Run a Node.js Asynchronous Task