OperationMode::SIMULATE_STRICT and zero-byte files

[tomwelch]

ZipStream-PHP version

3.1.0

PHP version

8.3.3

Constraints for Bug Report

• I'm using a version of ZipStream that is currently supported:
  https://github.com/maennchen/ZipStream-PHP#version-support

• I'm using a version of PHP that has active support:
  https://www.php.net/supported-versions.php

• I'm using a version of PHP that is compatible with your used
  ZipStream version.

• I'm using the latest release of the used ZipStream major version.

Summary

I'm using the SIMULATE_STRICT Operation Mode to add the Content-Length header as documented here but I'm running into an error with zero-byte files (think .gitkeep etc)

Current behavior

A SimulationFileUnknownException is thrown when calling addFileFromCallback() and the exactSize is 0.

How to reproduce

Set the Operation Mode to SIMULATE_STRICT and add a file that has a size of zero bytes.

$files = [
    'hello-world.txt', // content: "hello world"
    'empty-file.txt',  // content: ""
];

$zip = new ZipStream(
    operationMode: OperationMode::SIMULATE_STRICT,
    defaultCompressionMethod: CompressionMethod::STORE,
    outputName: 'archive.zip',
);

foreach ($files as $path) {
    $zip->addFileFromCallback(
        fileName: basename($path),
        callback: fn () => fopen($path, 'r'),
        exactSize: filesize($path),
    );
}

$zip->finish();

Expected behavior

(Hopefully) it is possible to use the SIMULATE_STRICT Operation Mode with empty files.

[maennchen]

@tomwelch Can you try if #302 fixes your issue?

[maennchen]

Closing in favor of PR

[tomwelch]

Good morning @maennchen. That looks great, thank you for the fix!