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POPOSTing base64 data JavaScript/jQuery
 

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    <p>I am working on a website that allows users to edit photos (in-browser) and then upload them. To edit the images in-browser, I use some JavaScript libraries that work with images in base64. As a result, to POST the image to my server, a simple form with a file input cannot be used. The value of a hidden input is set to a base64 string of the edited image, and that is POSTed. Please see the following, short example.</p> <p><a href="http://pastebin.com/PrfWaS3D" rel="noreferrer">http://pastebin.com/PrfWaS3D</a></p> <p>Obviously, this is very much stripped down, but it does contain the problem I'm running into. In POSTing a 3MB animated GIF, it took 6.5 minutes. During which, my computer was almost completely frozen/unresponsive. (Note: This works <em>perfectly</em> for small images, though)</p> <p>It might be an OS/browser issue, (latest Google Chrome on Ubuntu) but I doubt it. If I put that file input inside the form, and remove base64-ing of data, (i.e. - a standard POSTing of a file) it goes in about one second.</p> <p>Compare 6.5 minutes to 1 second. I have to be doing something wrong. What am I doing wrong here? What should I be doing instead? I'm fairly new to web development, so I'm a little bit in the dark. I am aware that base64 does incur something like a 1.3x size increase, but obviously the upload time here is not scaling with 1.3x. I have done a little bit of console.logging, and </p> <pre><code>var base64 = reader.result; </code></pre> <p>takes about a second. So I do not think that the bottleneck is there. The bottleneck has to be in the uploading. But why? Why is a form file input <em>so</em> much faster than a form hidden input with base64?</p> <p>I apologize for my long winded post, but again, I am new to web development, and don't <em>really</em> understand my problem, so it's hard to be concise while getting all the information across.</p> <p>Thanks</p>
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    1. COWhat is your backend server?
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    2. CO-A data url is not the same as base64... These days data URLs are mostly UUIDs, not the full base64 body + meta data. Uploading that UUID is useless.- If you really mean to base64 in JS, use [`btoa()`](https://developer.mozilla.org/en-US/docs/Web/API/window.btoa).
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    3. COMy backend server? It's PHP. (Is that what you're asking?)
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