This is due to the fact that the WebViewLink property is returned only in public folders for viewing its static web resources (HTML, CSS, JS, image files, etc.).), And not individual files inside such folders.
Support for files that cannot be edited using Google Drive is limited. Google does not offer permalinks for images. For example, if you check the source code of a page or use features such as "view information about a Firefox page," you will get a link that doesn't work. You need to replace this URL http://docs.google.com/file/d/FILEID/ with the address bar http://drive.google.com/uc?export=view&id=FILEID , where FILEID is a long sequence of numbers and letters.
It should also be noted that Google Drive will not work with browsers Chrome 23, Firefox 23, IE9, Safari 6 or earlier. You will need to update your browser in order to use Drive.
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