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POHow to receive php image data over copy-n-paste javascript with XMLHttpRequest
 

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  1. POHow to receive php image data over copy-n-paste javascript with XMLHttpRequest
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    <p>I try to make an image-upload functionality similar to the one GMail uses. You copy (CTRL-C) an image from your desktop and paste (CTRL-V) it onto the website. The image is then uploaded via a XMLHttpRequest to a php-script that handles the incoming file, whereby "handling" means renaming and storing on the server.</p> <p>I can already fetch the image (and -data), but I am unable to successfully submit and receive the XMLHttpRequest. My Javascript code looks like that:</p> <pre><code> document.onpaste = function(e){ var items = e.clipboardData.items; console.log(JSON.stringify(items)); if (e.clipboardData.items[1].kind === 'file') { // get the blob var imageFile = items[1].getAsFile(); console.log(imageFile); var reader = new FileReader(); reader.onload = function(event) { console.log(event.target.result); // data url! submitFileForm(event.target.result, 'paste'); }; } }; function submitFileForm(file, type) { var formData = new FormData(); formData.append('file', file); formData.append('submission-type', type); var xhr = new XMLHttpRequest(); xhr.open('POST', 'php/image-upload.php'); xhr.onload = function () { if (xhr.status == 200) { console.log('all done: '); } else { console.log('Nope'); } }; xhr.send(formData); } </code></pre> <p>The handling php (<code>php/image-upload.php</code>) looks like that:</p> <pre><code>$base64string = $_POST['file']; file_put_contents('img.png', base64_decode($base64string)); </code></pre> <p>I think the <code>$_POST['file']</code> stays empty, but I am not sure. What's more, I also encounter the "blob size" (displayed with console.log()) is way larger than the actual image size. But maybe that's no matter or caused by encodings.</p> <p>The developer console displays this.</p> <pre><code>{"0":{"type":"text/plain","kind":"string"},"1":{"type":"image/png","kind":"file"},"length":2} image-upload.js:8 Blob {type: "image/png", size: 135619, slice: function} </code></pre> <p>If I view the file-info by right-clicking the actual image file, it shows <code>5,320 bytes (8 KB on disk)</code> in size.</p> <p>I do not necessarily need to use a <code>XMLHttpRequest</code>, it was just what came to my mind first. If there's a better way of achieving realtime image-uploading to a server with javascript, please let us know.</p>
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    1. COwhat does the network tab of your developer console shows. is the file being actually submitted over the wire or an empty form is being sent.
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    2. CO@DevZer0 I added it
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    3. COyour `reader.onload = function(event) { console.log(event.target.result); // data url! submitFileForm(event.target.result, 'paste'); };` function is not firing.
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