Poco

<p>This plugin searches your blog posts for images that are hosted on Blogger (blogger.com or blogspot.com),<br />
downloads them to your server, and updates your posts to refer to the downloaded versions.</p>


Blogger Image Import

A plugin that copies blogger hosted images to your local server and updates the links within the posts.

WordPress.org

Sergey Biryukov

Samuel Wood (Otto)

Ryan McCue

Workshopshed

<p>The Blogger Importer imports your blog data from a Google Blogger site into a WordPress.org installation.</p>
<h4>Items imported</h4>
<ul>
<li>Categories</li>
<li>Posts (published, scheduled and draft)</li>
<li>Comments (not spam)</li>
<li>Images</li>
</ul>
<h4>Items not imported</h4>
<ul>
<li>Pages</li>
<li>Widgets/Widget Data</li>
<li>Templates/Theme</li>
<li>Comment and author Avatars</li>
</ul>
<h3>Reference</h3>
<ul>
<li>https://www.simplepie.org/</li>
</ul>
<p>The following were referenced for implementing the images and links</p>
<ul>
<li>https://wordpress.org/plugins/remote-images-grabber/</li>
<li>http://notions.okuda.ca/wordpress-plugins/blogger-image-import/</li>
<li>https://wordpress.org/plugins/cache-images/</li>
<li>https://wordpress.org/plugins/tumblr-importer/</li>
<li>https://core.trac.wordpress.org/ticket/14525</li>
<li>https://wpengineer.com/1735/easier-better-solutions-to-get-pictures-on-your-posts/</li>
<li>https://web.archive.org/web/20211121020918/http://www.velvetblues.com/web-development-blog/wordpress-plugin-update-urls/</li>
<li>http://wordpress.stackexchange.com/questions//media-sideload-image-file-name (not working)</li>
<li>https://code.tutsplus.com/a-guide-to-the-wordpress-http-api-the-basics–wp-25125t</li>
</ul>
<h3>Known Issues</h3>
<ul>
<li>Some users have reported that their IFrames are stripped out of the post content.</li>
<li>Requests for better performance of larger transfers and tranfers of images</li>
<li>Review of behavior when it re-imports, partiularly are the counts correct</li>
<li>Review using get_posts or get_comments with the appropriate parameters to get the counts and exists instead of using SQL</li>
<li>Incorrect notice, PHP Notice: The data could not be converted to UTF-8. You MUST have either the iconv or mbstring extension installed. This occurs even when Iconv is installed, could be related to Blogger reporting 0 comments</li>
<li>When the importer is running it’s not possible to stop it using the stop button</li>
<li>Blogger’s count of comments include those not linked to a post e.g. the post has been deleted.</li>
</ul>
<h3>Filters and Actions</h3>
<p>These actions and filters have been added so that you can extend the functionality of the importer without needing to modify the code.</p>
<p>Action – import_start – This is run when the import starts processing the records for a new blog</p>
<p>Action – import_done – This is run when the import finishes processing the records for a blog.</p>
<p>Filter – blogger_importer_congrats – Passes the list of options shown to the user when the blog is complete, options can be added or removed.</p>


Blogger Importer

Running the Blogger Importer in PHP 7 throws the following warning:

Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; Blogger_Importer has a deprecated constructor in /xxxxxx/wp-content/plugins/blogger-importer/blogger-importer.php on line 44

Another user reported this months ago, but it's not fixed yet.

Deprecated constructor warning

Imports posts, images, comments, and categories (blogger tags) from a Blogger blog then migrates authors to WordPress users.

Blogger Image Import vs Blogger Importer