Copyright (c) 2015 Pedro Dal Col, Pliny Smith

Zippex (aka Zipper)

Native Apex Zip utility for the salesforce.com platform.

Table of Contents

• How to install
• Constructors
  • Zippex()
  • Zippex(fileData)
• Public Methods
  • addFile(fileName, fileData, crc32)
  • containsFile(fileName)
  • getFileNames()
  • getFile(fileName)
  • getFileInfo(fileName)
  • getZipArchive()
  • removeFile(fileName)
  • renameFile(oldName, newName)
  • removePrefix(prefix)
  • unzipAttachment(srcAttId, destObjId, fileNames, attemptAsync)

How to install

Option 1: Manually save files to SF

Copy and paste from this repository the following four classes into new classes in your Salesforce instance.

1. HexUtil.cls
2. Puff.cls
3. Zippex.cls
4. ZippexTests.cls

Option 2: Use the 'Deploy to Salesforce' button

How to use

Constructors:

Zippex()

public Zippex()

Instantiates a new empty Zippex object (empty Zip archive).

Example

Zippex sampleZip = new Zippex();

Zippex(fileData)

public Zippex(Blob fileData)

Instantiates a new Zippex object from an existing Zip file.

Parameters

Name	Type	Description
fileData	Blob	Data containing a valid Zip file

Example

Attachment sampleAttachment = [SELECT Name, Body FROM Attachment WHERE Id='<ID_OF_ATTACHMENT>'];
Zippex sampleZip = new Zippex(sampleAttachment.Body);

Public Methods:

addFile(fileName, fileData, crc32)

public void addFile(String fileName, Blob fileData, String crc32)

Adds a new file to the current Zip archive.

Parameters

Name	Type	Description
fileName	String	File name including full path
fileData	Blob	Data containing the file data
crc32	String	(optional) little endian hex value of the CRC32. Enter null for addFile to calculate the CRC32 of the fileData

Example

Zippex sampleZip = new Zippex();
Blob fileData = Blob.valueOf('Sample text.');
sampleZip.addFile('sampleFolder/test.txt', fileData, null);
Blob zipData = sampleZip.getZipArchive();

containsFile(fileName)

public Boolean containsFile(String fileName)

Returns true if the current Zip archive contains the specified file.

Parameters

Name	Type	Description
fileName	String	File name including full path
Return	Boolean	Return true if file is in Zip archive

Example

Zippex sampleZip = new Zippex();
sampleZip.addFile('sampleFolder/test.txt', Blob.valueOf('Sample text.'), null);
System.assert(sampleZip.containsFile('sampleFolder/test.txt'));

getFileNames()

public Set<String> getFileNames()

Returns a set of filenames from the current Zip archive.

Parameters

Name	Type	Description
Return	Set<String>	Returns all file names including full path in the current Zip archive

Example

Attachment sampleAttachment = [SELECT Name, Body FROM Attachment WHERE Id='<ID_OF_ATTACHMENT>'];
Zippex sampleZip = new Zippex(sampleAttachment.Body);
Set <String> fileNames = sampleZip.getFileNames();
for (String fileName : fileNames)
{
    System.debug('file: ' + fileName);
}

getFile(fileName)

public Blob getFile(String fileName)

Extracts the specified file contents from the current Zip archive. If the file does not exist, returns null.

Parameters

Name	Type	Description
fileName	String	File name including full path
Return	Blob	File data

Example

Zippex sampleZip = new Zippex();
sampleZip.addFile('sampleFolder/test.txt', Blob.valueOf('Sample text.'), null);
Blob fileData = sampleZip.getFile('sampleFolder/test.txt');
System.assertEquals ('Sample text.', fileData.toString());

getFileInfo(fileName)

public Map<String,String> getFileInfo(String fileName)

Returns file metadata (lastModDateTime, crc32, fileSize, fileName, and fileComment).

Parameters

Name	Type	Description
fileName	String	File name including full path
Return	Map<String,String>	Contains values for lastModDateTime, crc32, fileSize, fileName, and fileComment

Example

Zippex sampleZip = new Zippex();
sampleZip.addFile('sampleFolder/test.txt', Blob.valueOf('Sample text.'), null);
Map <String, String> fileInfoMap = sampleZip.getFileInfo('sampleFolder/test.txt');
System.assertEquals ('12', fileInfoMap.get('fileSize'));
System.assertEquals ('sampleFolder/test.txt', fileInfoMap.get('fileName'));

getZipArchive()

public Blob getZipArchive()

Returns a Blob that contains the entire Zip archive.

Parameters

Name	Type	Description
Return	Blob	Full Zip archive data

Example

Zippex sampleZip = new Zippex();
sampleZip.addFile('sampleFolder/test.txt', Blob.valueOf('Sample text.'), null);
Blob zipData = sampleZip.getZipArchive();

removeFile(fileName)

public void removeFile(String fileName)

Removes a file from the current Zip archive.

Parameters

Name	Type	Description
fileName	String	File name to remove from Zip archive including full path

Example

Zippex sampleZip = new Zippex();
sampleZip.addFile('sampleFolder/file1.txt', Blob.valueOf('Sample text1.'), null);
sampleZip.addFile('sampleFolder/file2.txt', Blob.valueOf('Sample text2.'), null);
System.assert(sampleZip.getFileNames().contains('sampleFolder/file1.txt'));
System.assert(sampleZip.getFileNames().contains('sampleFolder/file2.txt'));
sampleZip.removeFile('sampleFolder/file1.txt');
System.assert(sampleZip.getFileNames().contains('sampleFolder/file1.txt') == false);
System.assert(sampleZip.getFileNames().contains('sampleFolder/file2.txt'));

renameFile(oldName, newName)

public void renameFile(String oldName, String newName)

Renames a file in the current Zip archive.

Parameters

Name	Type	Description
oldName	String	The current file name to be modified
newName	String	The new name that replaces the current file name

Example

Zippex sampleZip = new Zippex();
sampleZip.addFile('sampleFolder/file.txt', Blob.valueOf('Sample text1.'), null);
System.assert(sampleZip.getFileNames().contains('sampleFolder/file.txt'));
sampleZip.renameFile('sampleFolder/file.txt', 'sampleFolder/changedName.txt');
System.assert(sampleZip.getFileNames().contains('sampleFolder/file.txt') == false);
System.assert(sampleZip.getFileNames().contains('sampleFolder/changedName.txt'));

removePrefix(prefix)

public void removePrefix(String prefix)

Removes the specified prefix from all file names in the current Zip archive only if it occurs at the beginning of the file name.

Parameters

Name	Type	Description
prefix	String	The prefix to remove from file names

Example

Zippex sampleZip = new Zippex();
sampleZip.addFile('sampleFolder/file.txt', Blob.valueOf('Sample text1.'), null);
System.assert(sampleZip.getFileNames().contains('sampleFolder/file.txt'));
sampleZip.removePrefix('sample');
System.assert(sampleZip.getFileNames().contains('sampleFolder/file.txt') == false);
System.assert(sampleZip.getFileNames().contains('Folder/file.txt'));

unzipAttachment(srcAttId, destObjId, fileNames, attemptAsync)

public static void unzipAttachment(Id srcAttId, Id destObjId, String[] fileNames, Boolean attemptAsync){

Parameters

Name	Type	Description
srcAttId	Id	ID of the attachment to unzip
destObjId	Id	ID of the object to which unzipped files should be attached. If null the ParentId of the Zip archive will be used
fileNames	String[]	List containing file names to uncompress. If null, all files will be uncompressed
attemptAsync	Boolean	If true, it attempts to unzip files in a future call

Example

Zippex.unzipAttachment('<ID_OF_ATTACHMENT>', null, null, false);