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<!DOCTYPE html><!-- This page is a placeholder for generated extensions api doc. Note:
    1) The <head> information in this page is significant, should be uniform
       across api docs and should be edited only with knowledge of the
       templating mechanism.
    3) All <body>.innerHTML is genereated as an rendering step. If viewed in a
       browser, it will be re-generated from the template, json schema and
       authored overview content.
    4) The <body>.innerHTML is also generated by an offline step so that this
       page may easily be indexed by search engines.
--><html xmlns="http://www.w3.org/1999/xhtml"><head>
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  <title>Hosting - Google Chrome Extensions - Google Code</title></head>
  <body>  <div id="gc-container" class="labs">
      <div id="devModeWarning">
        You are viewing extension docs in chrome via the 'file:' scheme: are you expecting to see local changes when you refresh? You'll need run chrome with --allow-file-access-from-files.
      </div>
      <!-- SUBTEMPLATES: DO NOT MOVE FROM THIS LOCATION -->
      <!-- In particular, sub-templates that recurse, must be used by allowing
           jstemplate to make a copy of the template in this section which
           are not operated on by way of the jsskip="true" -->
      <div style="display:none">

        <!-- VALUE -->
        <div id="valueTemplate">
          <dt>
            <var>paramName</var>
              <em>

                <!-- TYPE -->
                <div style="display:inline">
                  (
                    <span class="optional">optional</span>
                    <span class="enum">enumerated</span>
                    <span id="typeTemplate">
                      <span>
                        <a> Type</a>
                      </span>
                      <span>
                        <span>
                          array of <span><span></span></span>
                        </span>
                        <span>paramType</span>
                        <span></span>
                      </span>
                    </span>
                  )
                </div>

              </em>
          </dt>
          <dd class="todo">
            Undocumented.
          </dd>
          <dd>
            Description of this parameter from the json schema.
          </dd>
          <dd>
            This parameter was added in version
            <b><span></span></b>.
            You must omit this parameter in earlier versions,
            and you may omit it in any version.  If you require this
            parameter, the manifest key
            <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
            can ensure that your extension won't be run in an earlier browser version.
          </dd>

          <!-- OBJECT PROPERTIES -->
          <dd>
            <dl>
              <div>
                <div>
                </div>
              </div>
            </dl>
          </dd>

          <!-- FUNCTION PARAMETERS -->
          <dd>
            <div></div>
          </dd>

        </div> <!-- /VALUE -->

        <div id="functionParametersTemplate">
          <h5>Parameters</h5>
          <dl>
            <div>
              <div>
              </div>
            </div>
          </dl>
        </div>
      </div> <!-- /SUBTEMPLATES -->

  <a id="top"></a>
    <div id="skipto">
      <a href="#gc-pagecontent">Skip to page content</a>
      <a href="#gc-toc">Skip to main navigation</a>
    </div>
    <!-- API HEADER -->
    <table id="header" width="100%" cellspacing="0" border="0">
      <tbody><tr>
        <td valign="middle"><a href="http://code.google.com/"><img src="images/code_labs_logo.gif" height="43" width="161" alt="Google Code Labs" style="border:0; margin:0;"></a></td>
        <td valign="middle" width="100%" style="padding-left:0.6em;">
          <form action="http://www.google.com/cse" id="cse" style="margin-top:0.5em">
            <div id="gsc-search-box">
              <input type="hidden" name="cx" value="002967670403910741006:61_cvzfqtno">
              <input type="hidden" name="ie" value="UTF-8">
              <input type="text" name="q" value="" size="55">
              <input class="gsc-search-button" type="submit" name="sa" value="Search">
              <br>
              <span class="greytext">e.g. "page action" or "tabs"</span>
            </div>
          </form>

          <script type="text/javascript" src="http://www.google.com/jsapi"></script>
          <script type="text/javascript">google.load("elements", "1", {packages: "transliteration"});</script>
          <script type="text/javascript" src="http://www.google.com/coop/cse/t13n?form=cse&amp;t13n_langs=en"></script>
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      </tr>
    </tbody></table>

    <div id="codesiteContent" class="">

      <a id="gc-topnav-anchor"></a>
      <div id="gc-topnav">
        <h1>Google Chrome Extensions (<a href="http://code.google.com/labs/">Labs</a>)</h1>
        <ul id="home" class="gc-topnav-tabs">
          <li id="home_link">
            <a href="index.html" title="Google Chrome Extensions home page">Home</a>
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            <a href="docs.html" title="Official Google Chrome Extensions documentation">Docs</a>
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            <a href="samples.html" title="Sample extensions (with source code)">Samples</a>
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              </li>
              <li>Browser Interaction
                <ul>
                  <li><a href="bookmarks.html">Bookmarks</a></li>
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                  <li><a href="management.html">Management</a></li>
                  <li><a href="tabs.html">Tabs</a></li>
                  <li><a href="windows.html">Windows</a></li>
                </ul>
              </li>
              <li>Implementation
                <ul>
                  <li><a href="a11y.html">Accessibility</a></li>
                  <li><a href="background_pages.html">Background Pages</a></li>
                  <li><a href="content_scripts.html">Content Scripts</a></li>
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                  <li><a href="idle.html">Idle</a></li>
                  <li><a href="i18n.html">Internationalization</a></li>
                  <li><a href="messaging.html">Message Passing</a></li>
                  <li><a href="npapi.html">NPAPI Plugins</a></li>
                </ul>
              </li>
              <li>Finishing
                <ul>
                  <li class="leftNavSelected">Hosting</li>
                  <li><a href="external_extensions.html">Other Deployment Options</a></li>
                </ul>
              </li>
            </ul>
          </li>
          <li><h2><a href="tutorials.html">Tutorials</a></h2>
            <ul>
              <li><a href="tut_debugging.html">Debugging</a></li>
              <li><a href="tut_analytics.html">Google Analytics</a></li>
              <li><a href="tut_oauth.html">OAuth</a></li>
            </ul>
          </li>
          <li><h2>Reference</h2>
            <ul>
              <li>Formats
                <ul>
                  <li><a href="manifest.html">Manifest Files</a></li>
                  <li><a href="match_patterns.html">Match Patterns</a></li>
                  <!-- <li>Packages (.crx)</li> -->
                </ul>
              </li>
              <li><a href="api_index.html">chrome.* APIs</a></li>
              <li><a href="api_other.html">Other APIs</a></li>
            </ul>
          </li>
         <li><h2><a href="samples.html">Samples</a></h2></li>
        </ul>
      </div>
      <script>
        initToggles();
      </script>

    <div class="g-unit" id="gc-pagecontent">
      <div id="pageTitle">
        <h1 class="page_title">Hosting</h1>
      </div>
        <!-- TABLE OF CONTENTS -->
        <div id="toc">
          <h2>Contents</h2>
          <ol>
            <li>
              <a href="#gallery">Publishing to the Extensions Gallery</a>
              <ol>
                <li style="display: none; ">
                  <a>h3Name</a>
                </li>
              </ol>
            </li><li>
              <a href="#server">Hosting on your own server</a>
              <ol>
                <li style="display: none; ">
                  <a>h3Name</a>
                </li>
              </ol>
            </li>
              <li style="display: none; ">
                <a href="#apiReference">API reference</a>
                <ol>
                  <li>
                    <a href="#properties">Properties</a>
                    <ol>
                      <li>
                        <a href="#property-anchor">propertyName</a>
                      </li>
                    </ol>
                  </li>
                  <li>
                    <a href="#methods">Methods</a>
                    <ol>
                      <li>
                        <a href="#method-anchor">methodName</a>
                      </li>
                    </ol>
                  </li>
                  <li>
                    <a href="#events">Events</a>
                    <ol>
                      <li>
                        <a href="#event-anchor">eventName</a>
                      </li>
                    </ol>
                  </li>
                  <li>
                    <a href="#types">Types</a>
                    <ol>
                      <li>
                        <a href="#id-anchor">id</a>
                      </li>
                    </ol>
                  </li>
                </ol>
              </li>
          </ol>
        </div>
        <!-- /TABLE OF CONTENTS -->

        <!-- Standard content lead-in for experimental API pages -->
        <p id="classSummary" style="display: none; ">
          For information on how to use experimental APIs, see the <a href="experimental.html">chrome.experimental.* APIs</a> page.
        </p>

        <!-- STATIC CONTENT PLACEHOLDER -->
        <div id="static"><div id="pageData-name" class="pageData">Hosting</div>
<div id="pageData-showTOC" class="pageData">true</div>

<p>
Until the
<a href="http://code.google.com/chrome/webstore/">Chrome Web Store</a>
is available to the public,
you can host your extension
using the <a href="https://chrome.google.com/extensions">Extensions Gallery</a>.
Once the store is public,
the gallery's contents will be merged into the store.
Another option
is hosting your extension on other servers.
</p>

<p>
This page gives tips for using the gallery,
as well as details on how to host extensions on your own server.
</p>

<h2 id="gallery">Publishing to the Extensions Gallery</h2>

<p>
To publish extensions,
you first need to pay a one-time
<a href="http://blog.chromium.org/2010/08/security-improvements-and-registration.html">$5 developer registration fee</a>.
</p>

<p class="note">
<b>Note:</b>
If you used the Chrome Developer Dashboard before
the first developer preview release of the Chrome Web Store —
to publish an extension, for example —
you don't need to pay the fee.
</p>

<p>
Publishing to the gallery is easy,
but your extension might be more popular
if you take a little time to prepare:
</p>

<ul>
  <li> Visit the
    <a href="https://chrome.google.com/extensions">gallery</a>
    and look at similar extensions' pages.
    Your extension's page should look at least as good as theirs. </li>
  <li> Consider creating a support site for your extension,
    maybe a <a href="http://groups.google.com">Google Group</a>.
    If your extension's page has a link to your support site,
    people will be less likely to
    complain in the user comments. </li>
  <li> Consider creating a custom Gmail account
    for this extension or for all of your extensions.
    Only one account can upload, publish, and update your extension. </li>
  <li> Create some great text (titles and descriptions)
    and images (maybe even video) for your extension.
    See the
    <a href="http://www.google.com/support/chrome/bin/answer.py?answer=113909">gallery help</a>
    for details on screenshot and text requirements. </li>
</ul>

<p>
To upload your extension,
just zip up your extension's directory,
go to the
<a href="https://chrome.google.com/extensions/developer/dashboard">Developer Dashboard</a>,
and add your extension.
This creates a page for your extension,
viewable only by you.
Now you can edit your extension's page —
uploading images, specifying text, and so on.
</p>

<p>
Once you verify that your extension's page looks good
and all links are valid,
publish your extension.
</p>

<p>
When you want to update your extension,
use the dashboard to upload and publish the new version.
Your users will automatically get the new version
over the next few hours.
</p>


<h2 id="server">Hosting on your own server</h2>

<p>
By convention, extensions are served —
whether by the gallery or by a custom server —
as <code>.crx</code> files.
When you upload an extension to the gallery,
the gallery creates the <code>.crx</code> file for you.
If you aren't using the gallery,
you need to create the <code>.crx</code> file yourself,
as described in <a href="packaging.html">Packaging</a>.
</p>

<p class="note">
<b>Note:</b>
If you do your own hosting,
don't forget to set up
<a href="autoupdate.html">autoupdate</a>,
so you can be sure that
your extension's users have the latest version.
</p>

<p>
A server that hosts extensions
must use appropriate HTTP headers,
so that users can install your extension
by clicking a link to it.
</p>

<p>
Google Chrome considers a file to be an extension
if <b>either</b> of the following is true:
</p>

<ul>
  <li>
    The file has the content type
    <code>application/x-chrome-extension</code>
  </li>
  <li>
    The file suffix is <code>.crx</code>
    and <b>both</b> of the following are true:
    <ul>
      <li>
        The file <b>is not</b> served with
        the HTTP header <code>X-Content-Type-Options: nosniff</code>
      </li>
      <li>
        The file <b>is</b> served
        with one of the following content types:
        <ul>
          <li> empty string </li>
          <li> "text/plain" </li>
          <li> "application/octet-stream" </li>
          <li> "unknown/unknown" </li>
          <li> "application/unknown" </li>
          <li> "*/*" </li>
        </ul>
      </li>
    </ul>
  </li>
</ul>

<p>
The most common reason for failing to recognize an extension
is that the server sends the header
<code>X-Content-Type-Options: no sniff</code>.
The second most common reason
is that the server sends an unknown content type —
one that isn't in the previous list.
To fix an HTTP header issue,
either change the configuration of the server
or try hosting the extension at another server.
</p>
</div>

        <!-- API PAGE -->
        <div class="apiPage" style="display: none; ">
        <a name="apiReference"></a>
        <h2>API reference: chrome.apiname </h2>

          <!-- PROPERTIES -->
          <div class="apiGroup">
            <a name="properties"></a>
            <h3 id="properties">Properties</h3>

            <div>
              <a></a>
              <h4>getLastError</h4>
              <div class="summary">
                <!-- Note: intentionally longer 80 columns -->
                <span>chrome.extension</span><span>lastError</span>
              </div>
              <div>
              </div>
            </div>

          </div> <!-- /apiGroup -->

          <!-- METHODS -->
          <div class="apiGroup" id="methods">
            <a name="methods"></a>
            <h3>Methods</h3>

            <!-- iterates over all functions -->
            <div class="apiItem">
              <a></a> <!-- method-anchor -->
              <h4>method name</h4>

              <div class="summary"><span>void</span>
                  <!-- Note: intentionally longer 80 columns -->
                  <span>chrome.module.methodName</span>(<span><span>, </span><span></span>
                      <var><span></span></var></span>)</div>

              <div class="description">
                <p class="todo">Undocumented.</p>
                <p>
                  A description from the json schema def of the function goes here.
                </p>

                <!-- PARAMETERS -->
                <h4>Parameters</h4>
                <dl>
                  <div>
                    <div>
                    </div>
                  </div>
                </dl>

                <!-- RETURNS -->
                <h4>Returns</h4>
                <dl>
                  <div>
                    <div>
                    </div>
                  </div>
                </dl>

                <!-- CALLBACK -->
                <div>
                  <div>
                  <h4>Callback function</h4>
                  <p>
                    The callback <em>parameter</em> should specify a function
                    that looks like this:
                  </p>
                  <p>
                    If you specify the <em>callback</em> parameter, it should
                    specify a function that looks like this:
                  </p>

                  <!-- Note: intentionally longer 80 columns -->
                  <pre>function(<span>Type param1, Type param2</span>) <span class="subdued">{...}</span>;</pre>
                  <dl>
                    <div>
                      <div>
                      </div>
                    </div>
                  </dl>
                  </div>
                </div>

                <!-- MIN_VERSION -->
                <p>
                  This function was added in version <b><span></span></b>.
                  If you require this function, the manifest key
                  <a href="manifest.html#minimum_chrome_version">minimum_chrome_version</a>
                  can ensure that your extension won't be run in an earlier browser version.
                </p>
              </div> <!-- /description -->

            </div>  <!-- /apiItem -->

          </div>  <!-- /apiGroup -->

          <!-- EVENTS -->
          <div class="apiGroup">
            <a name="events"></a>
            <h3 id="events">Events</h3>

            <!-- iterates over all events -->
            <div class="apiItem">
              <a></a>
              <h4>event name</h4>

              <div class="summary">
                <!-- Note: intentionally longer 80 columns -->
                <span class="subdued">chrome.bookmarks</span><span>onEvent</span><span class="subdued">.addListener</span>(function(<span>Type param1, Type param2</span>) <span class="subdued">{...}</span>);
              </div>

              <div class="description">
                <p class="todo">Undocumented.</p>
                <p>
                  A description from the json schema def of the event goes here.
                </p>

                <!-- PARAMETERS -->
                <h4>Parameters</h4>
                <dl>
                  <div>
                    <div>
                    </div>
                  </div>
                </dl>

              </div> <!-- /decription -->

            </div> <!-- /apiItem -->

          </div> <!-- /apiGroup -->

          <!-- TYPES -->
          <div class="apiGroup">
            <a name="types"></a>
            <h3 id="types">Types</h3>

            <!-- iterates over all types -->
            <div class="apiItem">
              <a></a>
              <h4>type name</h4>

              <div>
              </div>

            </div> <!-- /apiItem -->

          </div> <!-- /apiGroup -->

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