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      <base href="https://bugs.webkit.org/" />
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    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - WKWebView needs feature to allow file:// subresources"
   href="https://bugs.webkit.org/show_bug.cgi?id=154916">154916</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>WKWebView needs feature to allow file:// subresources
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>WebKit
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>WebKit Nightly Build
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>iOS
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>iOS 9.2
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>Normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P2
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>WebKit API
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>webkit-unassigned&#64;lists.webkit.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>ashley&#64;scirra.com
          </td>
        </tr></table>
      <p>
        <div>
        <pre>WKWebView can load an index page from a file, as is typically done by Cordova applications. However applications using this approach immediately run in to some serious problems:

- XMLHttpRequest to local files fails
- images count as cross-origin, so cannot be uploaded as WebGL textures
- &lt;audio&gt; and &lt;video&gt; cannot load resources from file://
- scripts count as cross-origin, so all errors turn in to &quot;Script error&quot; on line 0, making debugging difficult

These problems make it virtually impossible to port a lot of Cordova apps to WKWebView, where they previously worked in UIWebView.

I suggest that either these restrictions are lifted and restored to how UIWebView treats them, or perhaps a new flag added to WKWebView to allow such subresource loads from local files to count as same-origin.</pre>
        </div>
      </p>
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