Django’s standard library lives in the django.contrib package. Each subpackage is a standalone add-on feature package. These subpackages are generally independent of one another, though some django.contrib subpackages depend on other subpackages. There is no hard requirement on the kinds of functions in django.contrib. Some of these packages ship with models (and therefore require you to install the corresponding database tables), while others consist of standalone middleware and template tags.

The team I work on is responsible for SaaS development and carries almost all of the center’s SaaS needs. Among these there are long-term maintenance projects and short-term crunch demo projects, and everyone wears several hats. Of course, the development platform is also open to other people to use, and the whole platform has hundreds if not thousands of SaaS applications.

Subtitle: Core Principles and Case Studies Author: Li Zhihui Publisher: Publishing House of Electronics Industry Year: 2013-9-1 ISBN: 9787121212000 Notes: Without business demand for technology, you cannot cultivate an outstanding architect. The author grew up alongside Taobao’s business growth. The book explains the key technical points of website architecture mainly from several aspects: system performance, availability, scalability, extensibility, and security.

The session mechanism for login: HTTP is a stateless protocol, and every request a browser makes is independent of the others. But not every HTTP request is unrelated to state, so the browser and the server have to jointly maintain a state — this is the session mechanism. One approach: the first time the browser sends a request to the server, the server returns a sessionID to the browser, and every subsequent request from the browser carries that sessionID to verify the same user.

Subtitle: A Revolution That Will Transform How We Live, Work, and Think Author: [UK] Viktor Mayer-Schönberger Publisher: Zhejiang People’s Publishing House Publication Year: 2012-12 ISBN: 9787213052545