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  • blog-category-djagno
  • blog-category-python
  • blog-category-mongodb
  • blog-categorya-ws

Amazon SES - Handling Bounces and Complaints

In general while sending emails, we will prepare some recipient addresses as our mailing list, which are valid and our recipients want and expect our mail. But some times, some emails which are invalid will bounce, and if valid recipients do not want your mail, they may mark your email as spam in their email client. High bounce and complaint rates put your account at risk of being shut down. So in order to avoid such problem we'll handle the bounces and complaints


Hosting Django Application with Nginx and UWSGI

Django is a python based web- application development framework. Setting up a sample app and running it as easy as pie. Nginx is a webserver and like every other webserver it has it Pro's and Con's. Nginx was an answer to concurrency issue(handling thousands of concurrent connections) faced in apache and raised to fame.


Amazon AWS IAM Roles and Policies

When You want to Provide access to Amazon Web Services Console or if you're planning to provide REST API Keys to your Developers of a Third Party Person, Using Providing access to Root Account Console or API Keys is not advisable since they basically will have full level access. Instead we can rely on IAM(Identity and Access Management).


CORS with Amazon S3 and CloudFront

We struggle to load fonts from CloudFront because of CORS.

CORS - Cross Origin Resource Sharing is a security measure to block macious scripts or resources loading from foreign domain origins. This security will become hurdle when want to load resources from Amazon CloudFront. this is often encounter when we want to load fonts from CloudFront. Here is simple yet detailed steps to enable CORS on CloudFront.


Python Web Scraping with Beautiful soup

Download all One Piece animation series episodes by scraping site using BeautifulSoup python library.


group() vs aggregation framework vs MapReduce in mongodb

The group() command, Aggregation Framework and MapReduce are collectively aggregation features of MongoDB. group(): Group Performs simple aggregation operations on a collection documents. Group is similar to GROUP_BY in mysql. Output format : Returns result set inline. Sharding: Its not support in shared environment. Limitations:


Django Generic many to many field implementation

Django application has a GM2MField that combines the features of the standard Django "ManyToManyField" and "GenericForeignKey".

Installation:
pip install django-gm2m


Daemonizing any command with SUPERVISOR

Daemonizing a command means to make it run as a background process.

so when we have a command that we want to daemonize there are many ways to do it, most common methods are:

1. using upstart
2. adding it to /etc/rc.local
3. creating a script in /etc/init.d and adding them to runlevel folders manually (i.e. incase you want to start, stop a command)


Django Subdomains to do advanced things

We always struggle to give users customization's even before they login to the system like abc.micropyramid.com and django don't know how to handle that out of the box.

We can do it by writing simple middle ware. Django Middle ware have access to request and responses, so, we can get hold on to request and pass it on to django views for further process. Here we will add new property to request and can render pages by seeing at the subdomain property.


Using Django's built in signals and writing custom signals.

Django has a beautiful feature of signals which will record all the actions performed on particular model. In the current blog post we’ll learn how to use django’s built in signals and how to create custom signal.

Django has lot of built in signals like pre_save, post_save, pre_delete and post_delete and etc. Now we’ll learn how to use django’s pre_delete signal with a simple example. In the way we use pre_delete in the present blog post we can use other signals also in the same way.


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