In this example, the Uploader is used to send multiple images or videos to the server and monitor their upload progress with individual counters. If the Uploader is used in a browser with HTML5 support, it is progressively enhanced to enable dragging-and-dropping files into the browser window.
Please note: This example will not work when run from a local filesystem because of security restrictions in the transport protocols used. If you’d like to run this example locally, set up a local web server and launch it from there.
Also note: The uploader is not supported on iOS devices (iPhone and iPad), because they lack file upload capability. This example provides a graceful degradation message for all such systems.
Also note: The backend script used in these examples does not store any information it receives. Nevertheless, do not submit any sensitive or private data and keep your tests to a few small files to avoid overloading the system.
| File name | File size | Percent uploaded |
|---|---|---|
| No files selected. | ||
Progressive Enhancement with a Drag-and-Drop Area
The base functionality in this example is the same as in the Simple Multiple Files Uploader, but we are conditionally adding support for a drag-and-drop area for cases where the HTML5 uploader is being used:
if (Y.Uploader.TYPE == "html5") {
uploader.set("dragAndDropArea", "body");
Y.one("#ddmessage").setHTML("<strong>Drag and drop files here.</strong>");
uploader.on(["dragenter", "dragover"], function (event) {
var ddmessage = Y.one("#ddmessage");
if (ddmessage) {
ddmessage.setHTML("<strong>Files detected, drop them here!</strong>");
ddmessage.addClass("yellowBackground");
}
});
uploader.on(["dragleave", "drop"], function (event) {
var ddmessage = Y.one("#ddmessage");
if (ddmessage) {
ddmessage.setHTML("<strong>Drag and drop files here.</strong>");
ddmessage.removeClass("yellowBackground");
}
});
}
Note that we are setting the entire page <body> as the drag-and-drop area, so the user can drop the files anywhere onto the page. We also add a visual response to the files
being dragged over the page by listening to the dragenter, dragover, dragleave and drop events.
Full Source Code For this Example
<style>
#filelist {
margin-top: 15px;
}
#uploadFilesButtonContainer, #selectFilesButtonContainer, #overallProgress {
display: inline-block;
}
#overallProgress {
float: right;
}
.yellowBackground {
background: #F2E699;
}
</style>
<div id="exampleContainer">
<div id="uploaderContainer">
<div id="selectFilesButtonContainer">
</div>
<div id="uploadFilesButtonContainer">
<button type="button" id="uploadFilesButton"
class="yui3-button" style="width:250px; height:35px;">Upload Files</button>
</div>
<div id="overallProgress">
</div>
</div>
<div id="filelist">
<table id="filenames">
<thead>
<tr><th>File name</th><th>File size</th><th>Percent uploaded</th></tr>
<tr id="nofiles">
<td colspan="3" id="ddmessage">
<strong>No files selected.</strong>
</td>
</tr>
</thead>
<tbody>
</tbody>
</table>
</div>
</div>
<script>
YUI({filter:"raw"}).use("uploader", function(Y) {
Y.one("#overallProgress").set("text", "Uploader type: " + Y.Uploader.TYPE);
if (Y.Uploader.TYPE != "none" && !Y.UA.ios) {
var uploader = new Y.Uploader({width: "250px",
height: "35px",
multipleFiles: true,
swfURL: "../../build/uploader/assets/flashuploader.swf?t=" + Math.random(),
uploadURL: "http://www.yswfblog.com/upload/simpleupload.php",
simLimit: 2,
withCredentials: false
});
var uploadDone = false;
if (Y.Uploader.TYPE == "html5") {
uploader.set("dragAndDropArea", "body");
Y.one("#ddmessage").setHTML("<strong>Drag and drop files here.</strong>");
uploader.on(["dragenter", "dragover"], function (event) {
var ddmessage = Y.one("#ddmessage");
if (ddmessage) {
ddmessage.setHTML("<strong>Files detected, drop them here!</strong>");
ddmessage.addClass("yellowBackground");
}
});
uploader.on(["dragleave", "drop"], function (event) {
var ddmessage = Y.one("#ddmessage");
if (ddmessage) {
ddmessage.setHTML("<strong>Drag and drop files here.</strong>");
ddmessage.removeClass("yellowBackground");
}
});
}
uploader.render("#selectFilesButtonContainer");
uploader.after("fileselect", function (event) {
var fileList = event.fileList;
var fileTable = Y.one("#filenames tbody");
if (fileList.length > 0 && Y.one("#nofiles")) {
Y.one("#nofiles").remove();
}
if (uploadDone) {
uploadDone = false;
fileTable.setHTML("");
}
Y.each(fileList, function (fileInstance) {
fileTable.append("<tr id='" + fileInstance.get("id") + "_row" + "'>" +
"<td class='filename'>" + fileInstance.get("name") + "</td>" +
"<td class='filesize'>" + fileInstance.get("size") + "</td>" +
"<td class='percentdone'>Hasn't started yet</td>");
});
});
uploader.on("uploadprogress", function (event) {
var fileRow = Y.one("#" + event.file.get("id") + "_row");
fileRow.one(".percentdone").set("text", event.percentLoaded + "%");
});
uploader.on("uploadstart", function (event) {
uploader.set("enabled", false);
Y.one("#uploadFilesButton").addClass("yui3-button-disabled");
Y.one("#uploadFilesButton").detach("click");
});
uploader.on("uploadcomplete", function (event) {
var fileRow = Y.one("#" + event.file.get("id") + "_row");
fileRow.one(".percentdone").set("text", "Finished!");
});
uploader.on("totaluploadprogress", function (event) {
Y.one("#overallProgress").setHTML("Total uploaded: <strong>" +
event.percentLoaded + "%" +
"</strong>");
});
uploader.on("alluploadscomplete", function (event) {
uploader.set("enabled", true);
uploader.set("fileList", []);
Y.one("#uploadFilesButton").removeClass("yui3-button-disabled");
Y.one("#uploadFilesButton").on("click", function () {
if (!uploadDone && uploader.get("fileList").length > 0) {
uploader.uploadAll();
}
});
Y.one("#overallProgress").set("text", "Uploads complete!");
uploadDone = true;
});
Y.one("#uploadFilesButton").on("click", function () {
if (!uploadDone && uploader.get("fileList").length > 0) {
uploader.uploadAll();
}
});
}
else {
Y.one("#uploaderContainer").set("text", "We are sorry, but to use the uploader, you either need a browser that support HTML5 or have the Flash player installed on your computer.");
}
});
</script>