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    <p>It sounds like they are using a web form, so you should strictly use POST. There is no getting round using a script somewhere if you want the client to send you a string (but why would you have them do this?). </p> <p>If they are POST'ing a form, use the POST method, then have a server side script use PUT to write to a backend API server, which will return a JSON page with the link to the latest image.</p> <p>If they are writing directly to the API, follow the same convention, except your user will use PUT directly (PUT isn't available in web forms, just POST and GET).</p> <p>EDIT: I have a possible solution for you for the client-side using HTML5. You could put the image into an html5 canvas and convert the data into a string. Then just grab that string and POST it via the form. See <a href="https://stackoverflow.com/questions/12950465/how-to-get-image-bytes-string-base64-in-html5-jquery-javascript">this answer</a> for more info on how to do this. </p> <pre><code>&lt;label&gt;Image File:&lt;/label&gt;&lt;br/&gt; &lt;input type="file" id="imageLoader" name="imageLoader"/&gt; &lt;canvas id="imageCanvas"&gt;&lt;/canvas&gt; &lt;script&gt; var imageLoader = document.getElementById('imageLoader'); imageLoader.addEventListener('change', handleImage, false); var canvas = document.getElementById('imageCanvas'); var ctx = canvas.getContext('2d'); function handleImage(e){ var reader = new FileReader(); reader.onload = function(event){ var img = new Image(); img.onload = function(){ canvas.width = img.width; canvas.height = img.height; ctx.drawImage(img,0,0); } img.src = event.target.result; } reader.readAsDataURL(e.target.files[0]); /** replace readAsDataURL() with something that will read it to a string. Reference: https://developer.mozilla.org/en-US/docs/DOM/FileReader **/ } &lt;/script&gt; </code></pre> <p>To summarize: put the image into the canvas DOM element, then convert the canvas data to a string.</p>
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