django-protocolify A Django app that provides template tag to change the protocol of URLs
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Django template tag template tag URL protocol

django-protocolify Description

A Django app that provides template tag to change the protocol of URLs django-protocolify is a template tag for Django that allows the protocol/scheme used in links within a block of template code to be changed.A use-case for this is when a section of your Web site uses HTTPS (e.g. a payment page) and you want the user to return to using HTTP if they leave the page. Typically you'll be using the {% url %} template tag to generate URLs, however this will result in URLs like:/products/rather than:http://example.com/products/This means that once a user enters a HTTPS page, they will be stuck using HTTPS unless they manually modify the URL in their browser's address bar.This is where django-protocolify shines.Usage{% protocolify to < new > %}Example (assuming request was to http://example.com/blah/):{% load protocolify %}{% protocolify to "https" %}< a href="/abcd/" >< /a >< a href="abcd/" >< /a >< a href="./abcd/" >< /a >< a href="../abcd/" >< /a >< a href="http://example.com/abcd/" >< /a >< a href="http://example.com" >< /a >< a href="ftp://example.com/abcd/" >< /a >< a href="ftp://example.com" >< /a >< a href="ftp://example.com/" > < a href="" >< /a >{% endprotocolify %}renders to:< a href="https://example.com/abcd/" >< /a >< a href="https://example.com/blah/abcd/" >< /a >< a href="https://example.com/blah/abcd/" >< /a >< a href="https://example.com/abcd/" >< /a >< a href="https://example.com/abcd/" >< /a >< a href="https://example.com" >< /a >< a href="https://example.com/abcd/" >< /a >< a href="https://example.com" >< /a >< a href="https://example.com/" >< /a >< a href="https://example.com/blah/" >< /a >This is currently implemented using a couple of simplistic regular expressions and urlparse.urljoin() (Note: old defaults to +):# e.g. href="http://google.com"re.sub(r' (src|href)="%s://' % old, r' \1="%s://' % new, ...)# e.g. href="../products"re.findall(r""" (src|href)=("|')(?!*:)(.*?)\2""")When a relative path is replaced (e.g. ../products) it's joined to the request.path. For this to work, the template context must contain the HttpRequest in a request variable. This can be achieved by using a RequestContext and adding "django.core.context_processors.request" to the TEMPLATE_CONTEXT_PROCESSORS setting.Domain ambiguitity is introduced when a relative path (e.g. /products/) is protocolified (because the domain must be specified). Domain guesses are performed in the following order:1. request.META -- when the context contains request2. Site.objects.get_current().domainInstallation1. Download and install: pip install django-protocolify2. Add "protocolify" to the INSTALLED_APPS setting in your project. Requirements: · Python · Django

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