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    <p>If you're under MacOS or Linux, you can use the <code>unzip</code> command to unzip from <code>stdin</code>.</p> <p>In this example I'm reading the zip file from the filesystem into a <code>Buffer</code> object but it works with a downloaded file as well:</p> <pre><code>// Get a Buffer with the zip content var fs = require("fs") , zip = fs.readFileSync(__dirname + "/test.zip"); // Now the actual unzipping: var spawn = require('child_process').spawn , fileToExtract = "test.js" // -p tells unzip to extract to stdout , unzip = spawn("unzip", ["-p", "/dev/stdin", fileToExtract ]) ; // Write the Buffer to stdin unzip.stdin.write(zip); // Handle errors unzip.stderr.on('data', function (data) { console.log("There has been an error: ", data.toString("utf-8")); }); // Handle the unzipped stdout unzip.stdout.on('data', function (data) { console.log("Unzipped file: ", data.toString("utf-8")); }); unzip.stdin.end(); </code></pre> <p>Which is actually just the node version of:</p> <pre><code>cat test.zip | unzip -p /dev/stdin test.js </code></pre> <p><strong>EDIT</strong>: It's worth noting that this will not work if the input zip is too big to be read in one chunk from stdin. If you need to read bigger files, and your zip file contains only one file, you can use <a href="http://www.info-zip.org/mans/funzip.html" rel="nofollow noreferrer">funzip</a> instead of <code>unzip</code>:</p> <pre><code>var unzip = spawn("funzip"); </code></pre> <p>If your zip file contains multiple files (and the file you want isn't the first one) I'm afraid to say you're out of luck. Unzip needs to seek in the <code>.zip</code> file since zip files are just a container, and unzip may just unzip the last file in it. In that case you have to save the file temporarily (<a href="https://github.com/bruce/node-temp" rel="nofollow noreferrer">node-temp</a> comes in handy).</p>
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    1. POHow to download and unzip a zip file in memory in NodeJs?
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    1. COI'm interested in reasoning for someone down voting without leaving a comment. Seriously, what is the reason for this to not work? I'm a beginner.
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    2. COI never got the downvoting without a comment neither... I assume it's because this only works with one file or if the zip is fairly small.
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    3. CO@Doug Welcome to StackOverflow. I upvote your answer.
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