Ok, I already told you how to ping other sites via django (pingback). Now it’s time for a description how to receive pings from the other bloggers.

Notice: that would be quite easy example. I tested it on pings sending by wordpress, so it should works for them. However… I’m not sure about the rest of blog engines.

I think that it’s an easiest possible implementation of this functionality.

Let’s start.

Add new URL to urls.py

cd /path_to_our_project
vim urls.py

add there:

(r'^xml-rpc/$', 'my_project.main.views.receive_pingback', {}),

New table in database

vim main/models.py

add there:

class Trackback(models.Model):
	news = models.ForeignKey('main.News', related_name='news2Trackback')
	target_url = models.CharField('Target url', max_length=255)
	source_url = models.CharField('Source url', max_length=255)
	title = models.CharField('Title', max_length=255)
	content = models.CharField('Content', max_length=255)
	remote_ip = models.CharField('Remote IP', max_length=127)
	dateCreated = models.DateTimeField('Date created', 'date created')

	class Meta:
		verbose_name = 'Trackback'
		verbose_name_plural = 'Trackbacks'

	def __unicode__(self):
		return self.news

save the file and run script in command line:

python manage.py syncdb

Receiving pingbacks

now… implement method receive_pingback():

cd main/views.py

and add there:

from django.http import HttpResponse
from django.core.mail import send_mail
from datetime import datetime as datetime2now

def receive_pingback(request):
	if request.method == 'POST' and len(request.POST):
		my_req = request.POST['.*)\(?P.*)\<\/string")

		inc = 0
		source_url = None
		target_url = None
		for ea in line_splitted:
			match = param_re.match(ea)
			if match:
				line_data = match.group('data')

				if inc == 0:
					source_url = line_data
				else:
					target_url = line_data

				inc += 1

		if source_url and target_url:
			is_tb = Trackback.objects.filter(source_url = source_url, target_url = target_url)
			if is_tb:
				return HttpResponse('OK')

			splitted_target = target_url.split('/')
			if len(splitted_target) < 2:
				return HttpResponse('Bad params!')

			news_slug = splitted_target[-1]
			if not news_slug:
				news_slug = splitted_target[-2]		

			news = News.objects.get(slug = news_slug)

			if not news:
				return HttpResponse('Unknown news!')

			splitted_source = source_url.split('/')
			if len(splitted_source) < 2:
				return HttpResponse('Bad params!')

			title = splitted_source[2]

			t = Trackback(
				news = news,
				target_url = target_url,
				source_url = source_url,
				title = title,
				content = '',
				remote_ip = request.META['REMOTE_ADDR'],
				dateCreated = datetime2now.now()
			)
			t.save()

			emailMessage = 'Trackback to your article: ' + str(target_url)

			mailFrom = 'my_project.com '
			send_mail('New trackback on your website',
				emailMessage,
				mailFrom,
				['your_email_address']
			)

			return HttpResponse('OK')
		else:
			return HttpResponse('Bad params!')

	else:
		status = 'I can handle only POST requests.'

		return HttpResponse(status)

A bit of description:

1. source_url – website, which pings your site
2. target_url – pinged URL
3. all pingbacks has been saved in database via Trackback model
4. mail about new pingback to your article has been sent to you

That’s all.

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Hello, I'm Karol Zielinski, internet evangelist, an entrepreneur, project manager and a web developer from Gdynia, Poland. I like creative design, good advertisement, social media and all kind of stuff around the web.

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