php/test/misc/upload/upload.xml

<?xml version="1.0" encoding="UTF-8"?>
<!--
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 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
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 *   http://www.apache.org/licenses/LICENSE-2.0
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 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
-->
<Module>
  <ModulePrefs title="Content upload">
    <Require feature="dynamic-height"/>
  </ModulePrefs>
  <Content type="html">
    <![CDATA[
    <script type="text/javascript">

function initData() {
  var jsonInput = document.getElementById("json-input");
  jsonInput.value = ' [ { "method":"mediaitems.create", "params": {"albumId":"1", "mediaItem": { "id" : "11223344", "thumbnailUrl" : "http://www.libpng.org/pub/png/img_png/pngnow.png", "mimeType" : "image/png", "type" : "image", "url" : "@field:1.jpg", "albumId" : "1" } } } ]';
  gadgets.window.adjustHeight();
}


function restDelete() {
  var restUrl = document.getElementById("rest-delete-url");
  var xhr = new window.XMLHttpRequest();
  xhr.open("DELETE", restUrl.value, true);
  xhr.setRequestHeader("Content-type", "application/json");
  xhr.send(null);
}

function restGet() {
  var restUrl = document.getElementById("rest-get-url");
  var xhr = new window.XMLHttpRequest();
  xhr.open("GET", restUrl.value, true);
  xhr.setRequestHeader("Content-type", "application/json");
  xhr.send(null);
}

gadgets.util.registerOnLoadHandler(initData);
    </script>

    please use firebug to see the requests and the responses and copy the created url to browser address bar to fetch the created image.
    <p>The JSON RPC method.</p>
    The JSON data that will be posted.
    <form enctype="multipart/form-data"
      action="http://shindig/social/rpc?st=1:1:1:partuza:test.com:1:0" method="POST">
      <textarea id="json-input" cols=100 rows=4 name="request" ></textarea><br/>
      The image file to upload:
      <input name="uploadedfile" type="file" /><br />
      <input type="submit" value="JsonRpc create media item." />
    </form>
    <br/>
    <p> The REST method.</p>
    <form enctype="multipart/form-data" action="http://shindig/social/rest/mediaitems/@me/@self/1?st=1:1:1:partuza:test.com:1:0&mediaType=IMAGE&title=mobile&description=g1" method="POST">
      Choose an image file to upload:
      <input type="file" name="uploadedfile" />
      <input type="submit" value="Rest create media item." />
    </form>
    <p> REST delete </p>
    The url: <input id="rest-delete-url" size=60 type="text" value="http://shindig/social/rest/mediaitems/@me/@self/1/64?st=1:1:1:partuza:test.com:1:0" />
    <input type="button" onclick="restDelete()" value="delete"/>

    <p> REST get </p>
    The url: <input id="rest-get-url" size=60 type="text" value="http://shindig/social/rest/mediaitems/@me/@self/1/64?st=1:1:1:partuza:test.com:1:0" />
    <input type="button" onclick="restGet()" value="get"/>

    ]]>
  </Content>
</Module>