I’m trying to use Javascript to upload a png to imgur. I’ve used the code directly from the Imgur API example, but I don’t think I am passing the png file properly as I get an error message saying file.type is undefined. I think the file is ok as I’ve tried this with a few different pngs. My code is as follows:
<html>
<head>
<script type="text/javascript">
function upload(file) {
// file is from a <input> tag or from Drag'n Drop
// Is the file an image?
if (!file || !file.type.match(/image.*/)) return;
// It is!
// Let's build a FormData object
var fd = new FormData();
fd.append("image", file); // Append the file
fd.append("key", "mykey"); // Get your own key: http://api.imgur.com/
// Create the XHR (Cross-Domain XHR FTW!!!)
var xhr = new XMLHttpRequest();
xhr.open("POST", "http://api.imgur.com/2/upload.json"); // Boooom!
xhr.onload = function() {
// Big win!
// The URL of the image is:
JSON.parse(xhr.responseText).upload.links.imgur_page;
}
// Ok, I don't handle the errors. An exercice for the reader.
// And now, we send the formdata
xhr.send(fd);
}
</script>
</head>
<body>
<button type="button" onclick="upload('test.png')">upload to imgur</button>
</body>
</html>
The png file test.png is stored in the same directory as my html file.
The example you are using expects that you use input element (type=file) to upload some image. Try this example. You can access image data using a Canvas like this.
To summarize, you’ll need to do this: