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  <li class="parent " data-id="github.com/pablotron/zip-crystal/Zip" data-name="zip">
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<div id="main-content">
<h1>zip-crystal</h1>

<p>Read and write zip archives natively from
<a href="http://crystal-lang.org/" target="_blank">Crystal</a>.</p>

<p><em>Features</em></p>

<ul><li>Read and write zip files</li><li>Native Crystal, no dependencies other than zlib</li><li>Stream writing (e.g. write zip to socket, pipe, or other arbitrary, non-seekable IO)</li><li>ZIP64 support</li><li>Store and DEFLATE compression</li><li>UTF-8 filename and comment support (EFS)</li></ul>

<p><em>TODO</em></p>

<ul><li>LZMA and BZip2 compression</li><li>Encryption (Legacy and Strong Encryption)</li><li>Split archives (e.g. multi-disk archives)</li><li>Legacy Unicode support</li></ul>

<h2>Installation</h2>

<p>Add this to your application's <code>shard.yml</code>:</p>

<pre><code class='language-yaml'>dependencies:
  zip-crystal:
    github: pablotron/zip-crystal</code></pre>

<h2>Usage</h2>

<pre><code class='language-crystal'><span class="k">require</span> <span class="s">&quot;zip-crystal/zip&quot;</span>

<span class="c"># write to &quot;foo.zip&quot;</span>
<span class="t">Zip</span>.write(<span class="s">&quot;foo.zip&quot;</span>) <span class="k">do</span> <span class="o">|</span>zip<span class="o">|</span>
  <span class="c"># add &quot;bar.txt&quot; with contents &quot;hello&#33;&quot;</span>
  zip.add(<span class="s">&quot;bar.txt&quot;</span>, <span class="s">&quot;hello&#33;&quot;</span>)

  <span class="c"># add local file &quot;/path/to/image.png&quot; as &quot;image.png&quot;</span>
  zip.add_file(<span class="s">&quot;image.png&quot;</span>, <span class="s">&quot;/path/to/image.png&quot;</span>)
<span class="k">end</span>

<span class="c"># create memory io</span>
mem_io <span class="o">=</span> <span class="t">MemoryIO</span>.<span class="k">new</span>

<span class="c"># read from &quot;foo.zip&quot;</span>
<span class="t">Zip</span>.read(<span class="s">&quot;foo.zip&quot;</span>) <span class="k">do</span> <span class="o">|</span>zip<span class="o">|</span>
  <span class="c"># extract &quot;bar.txt&quot; to mem_io</span>
  zip[<span class="s">&quot;bar.txt&quot;</span>].write(mem_io)

  <span class="c"># extract &quot;image.png&quot; to &quot;output-image.png&quot;</span>
  zip[<span class="s">&quot;image.png&quot;</span>].write(<span class="s">&quot;output-image.png&quot;</span>)
<span class="k">end</span></code></pre>

<p>See the <a href="https://pablotron.github.com/zip-crystal/" target="_blank">API documentation</a>
for additional information.</p>

<h2>Contributing</h2>

<ol><li>Fork it ( https://github.com/pablotron/zip-crystal/fork )</li><li>Create your feature branch (git checkout -b my-new-feature)</li><li>Commit your changes (git commit -am 'Add some feature')</li><li>Push to the branch (git push origin my-new-feature)</li><li>Create a new Pull Request</li></ol>

<h2>Contributors</h2>

<ul><li><a href="https://github.com/pablotron" target="_blank">pablotron</a> Paul Duncan - creator, maintainer</li></ul>
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