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PODownload file from Dropbox with JavaScript
 

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    <h2>I have</h2> <p>I have a web site were try to provide a service to a client to be abel to download from Dropbox a file. For simplicity of development I use <a href="https://www.dropbox.com/developers/chooser" rel="nofollow noreferrer">Dropbox chooser</a>. For this I enable domains I expect to download from and include <code>&lt;script&gt;</code> tag suggested by Dropbox itself (with corresponding <code>data-app-key</code>) into my HTML page. Everything works sweet. </p> <h2>Problem</h2> <p>Now I need to download a file selected by the user. <a href="https://www.dropbox.com/developers/chooser" rel="nofollow noreferrer">Dropbox chooser</a> doesn't seem to provide any functionality for this, what it does, is just retrieve an information about file. In my case this is a <code>direct link</code>, to download the file.</p> <p>To download the file, seems to me, I need to use <code>Dropbox.Client</code> which is defined in another Dropbox javascript library at <a href="http://cdnjs.cloudflare.com/ajax/libs/dropbox.js/0.9.1/dropbox.min.js" rel="nofollow noreferrer">//cdnjs.cloudflare.com/ajax/libs/dropbox.js/0.9.1/dropbox.min.js</a></p> <p>So using that libarry I run the code like this: </p> <pre><code>//OPTIONS FOR DROPBOX CHOOSER var options = { linkType: "direct", // THIS FUNCITON RUNS WHEN USER SELECTS SOMETHING // FROM DOPBOX_CHOOSER success: function (files) { // DEFINE APP KET FOR DROPBOX_CLIENT (KEY, SECRET...), WHICH I GET // BY CREATING NEW "CORE API" TYPE:Full Dropbox APPLICATION ON // DROPBOX APP CONSOLE var appKey = { key: 'APP KEY', secret: 'CLIENT SECRET', sandbox: true }; //INIT CLIENT var client = new Dropbox.Client(appKey); //TRY TO AUTHENTICATE IT client.authenticate(function (error, client) { if (error) { console.log(error); } if (client.isAuthenticated()) { //READ FILES for (var i = 0; i &lt; files.length; i++) { var file = files[i]; client.readFile(file.link, function (error, data) { if (error) { return console.log(error); // Something went wrong. } alert(data); // data has the file's contents }); } } else { console.log("Error on authentication"); } }); }, cancel: function () { } }; //OPEN DROPBOX_CHOOSER Dropbox.choose(options); </code></pre> <p>But all this fails reporting me: </p> <p><img src="https://i.stack.imgur.com/RbA5Z.png" alt="enter image description here"></p> <p>If I <em>don't call</em> <code>client.authenticate</code> I'm not able to download file as get "Not Authorized error" notification. </p> <h2>Question</h2> <p>How can I resolve this issue. ?</p>
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