Add webmention client code to Junco

Access these tags and links:

• #webmention
• #indieweb
• IndieWebCamp principles for building the indie Web
• http://webmention.org
• http://indiewebcamp.com/webmention
• https://github.com/phpish/webmention

"The ability for one webpage to let another know the first has linked to the second is a vital indieweb building block.
The key mention technology for the indieweb is: webmention"

http://gist.github.com/adactio/6575229 - "The form I put at the end of every blog post I make so that you can ping my webmention endpoint with your response."

<form method="post" action="/webmention.php">
<p>Have you published a response to this?
<label for="webmention-source">Let me know the <abbr title="Uniform Resource Locator">URL</abbr></label>:
</p>
<input type="url" name="source" id="webmention-source">
<input type="hidden" name="target" value="http://adactio.com/journal/6495/">
<input type="submit" value="Ping!">
</form>

Sep 15, 2013 - Parsing webmentions

Understanding

I'm still trying to understand webmentions and pingbacks.

I guess that I viewed this more as a remote-commenting function.

• Blogger A creates a post
• Blogger B would like to "comment" on Blogger A's post, but A does not allow comments.
• Blogger B can create a post that is responding to A, but unless B contacts A through e-mail or some other means, A will be unaware of B's blog response.
• But if Blogger A supported some kind of remote commenting system, and maybe that could be webmention, then Blogger B could create a blog post and include the URL to Blogger A's post.
• at the bottom of Blogger A's post would be Blogger B's blog post response title, which would be a link to Blogger B's reply post.
• Blogger B can only create one blog post response for each blog post by A.

The above would work and display similar to my reply as a blog post function in my Kestrel code that was removed when I started over with the Junco codebase.

Maybe a remote comment procedure would send to the original blog post app:

• reply blog post URL
• reply blog post title
• reply blog post author name/username that links to Blogger B's home page
• reply blog post creation/published date (date sent to Blogger A)
• an optional brief description or intro to the blog post, limited to x-number words or characters (Blogger A's software could set the char or word limit or not display the description at all)

Make it a POST request from Blogger B to Blogger A, and encapsulate the above info in JSON.

Could still be abused by spammers and trolls, unless Blogger A establishes a white list of users permitted to create blog replies. Blogger B would have to seek permission from Blogger A to be on the whitelist.

#todo
#junco