AnZipES6

Create an uncompressed zip file.

• This is ES6 version of @gitcobra/anzip
• Improvement to memory usage by using Blob instead of ArrayBuffer
• Some additional methods such as "get", "remove", etc

Installation

npm install @gitcobra/anzip-es6

Usage

import AnZip from '@gitcobra/anzip-es6'


// sample data
var bin = new Uint8Array([0, 1, 2, 3, 127, 255]);
var txt = 'text data';

// 1: create a new AnZip object
var azip = new AnZip;

// 2: add the data to an arbitrary path
azip.add('dir1/dir1_1/file1.bin', bin); // binary data
azip.add('dir2/text.txt', txt); // text data
azip.add('dir3/dir4/dir5'); // empty directories

// 3: output the zip as a blob
var blob = azip.zip();

Methods

add(path [, data])

• path: string
  • Path to directory or file in the zip. Forward slash('/') and backslash('\') are both allowed for directory separators.
• data (optional): TypedArray | Array | string | ArrayBuffer | Buffer | Blob
  • Data you want to store. If omitted, it just constructs directories.
• Return Value: void | Promise<boolean>
  • NOTE: When the data parameter is a Blob, this method calculates CRC asynchronously and returns a Promise that resolves a boolean value of success or failure for the adding process.
• Construct directories in the zip then add a data if specified. Throw an Error when you try to add any data to a file path already exists.

zip()

• Return Value: Blob
• Close the zip data and output as a Blob.

get(path [,blobType])

• path: string | number
• blobType: string
• Return Value: Blob | Uint8Array | Buffer | null
• Get a stored file data indicated by the path string or index number. The return type is always Blob after zip() method is executed or blobType argument is specified. If it does not have a file in the path, returns null.

has(path)

• path: string
• Return Value: boolean
• Check whether the path already exists.

remove(path)

• path: string | number
• Remove a file from the zip data. *It cannot remove directories.

isZipped()

• Return Value: boolean
• Return whether it was already zipped.

list(includeDirFlag)

• Returl Value: string[]
• List up all zipped file paths. When includeDirFlag is true, include directories themselves.

count([includeDir])

• includeDir(optional): boolean
• Return Value: number
• Get stored file count.

size()

• Return Value: number
• Get total size of added files

clear()

• Return Value: void
• Clear all data.

buffer()

• Return Value: Promise<ArrayBuffer | Buffer>
• Output the zip as a Promise that resolves to an ArrayBuffer or a Buffer.

blob()

• Return Value: Blob
• Output the zip binary as a Blob.

url()

• Return Value: string
• Output as an object URL.