Dart Requires Chilkat v11.0.0+

Set Entry Filepath (in output Zip) when Zipping

Demonstrates how to set the path for the file entry within the .zip to something different than the path in the filesystem. Dart

import 'package:chilkat/chilkat.dart';

void main() {
  var success = false;

  // This requires the Chilkat Zip API to have been previously unlocked.
  // See Unlock Chilkat Zip for sample code.

  final zip = CkZip();

  success = true;
  try {
    zip.newZip('qa_output/zipA.zip');
  } on ChilkatException {
    success = false;
  }

  // When an absolute filepath is passed to AddFile, the path within the .zip
  // will be one of two values:  (1) just the filename part if saveExtraPath is false,
  // or (2) the full absolute path, but made relative, if saveExtraPath is true.
  // (For example, "c:/ck2000/appData/UnitTest/qa_data/hamlet.xml" made relative is 
  // "ck2000/appData/UnitTest/qa_data/hamlet.xml")
  final saveExtraPath = false;
  try {
    zip.addFile('c:/ck2000/appData/UnitTest/qa_data/hamlet.xml', saveExtraPath);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // When a relative path is passed to AddFile, then saveExtraPath does not apply.
  // For example, assume our current working directory is "c:/ck2000/appData/UnitTest".  The following
  // call to AddFile creates an entry with the filepath "qa_data/hamlet.xml".
  try {
    zip.addFile('qa_data/hamlet.xml', saveExtraPath);
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
    return;
  }

  // Examine the entries
  final entry = CkZipEntry();
  final numEntries = zip.numEntries;
  var i = 0;
  while (i < numEntries) {
    zip.entryAt(i, entry);
    print('$i: ${entry.fileName}');
    i++;
  }

  // The output so far is:

  // 	0: hamlet.xml
  // 	1: qa_data/hamlet.xml

  // If we write the .zip as-is, then the zip will have two entries
  // with the filepaths as shown above.

  // This writes "qa_output/zipA.zip"
  zip.writeZip();

  // Now change the entry filepaths to whatever is desired.
  success = zip.entryOf('hamlet.xml', entry);
  if (!success) {
    print('entry not found');
    return;
  }

  entry.fileName = 'Shakespeare/Claudius1.xml';

  success = zip.entryOf('qa_data/hamlet.xml', entry);
  if (!success) {
    print('entry not found');
    return;
  }

  entry.fileName = 'Shakespeare/Claudius2.xml';

  // Change the name of the .zip to be written and write again:
  zip.fileName = 'qa_output/zipB.zip';
  try {
    zip.writeZipAndClose();
    print('Zip created!');
  } on ChilkatException catch (e) {
    print(e.lastErrorText);
  }

  // Examine both zipA.zip and zipB.zip using 7zip (or another tool) to see the differences.
}