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.

Note: A few brief words on a sharing session by a teammate. App Engine frees development from the tedious deployment and configuration process and provides full-fledged automated support services. Its Controller is the brain of App Engine, coordinating and controlling the operation of the whole engine. The slides mainly cover App Engine’s design approach and evolution, and also give thought to resource scheduling and failure disaster recovery.

The platform currently includes multiple subsystems and multiple versions, and all versions use the same operations system. To make it easy for users to use multiple versions, we need to bind their QQ and WeChat accounts. In addition, to minimize the chance that a failure in some login system leaves

1. What Django Is Django is a web development framework written in Python. It was initially used by its developers to manage news-content-focused websites, was open-sourced under the BSD license in July 2005, and formally established its foundation on June 17, 2008. Other Python web frameworks alongside Django include Tornado

1. SOA Service-Oriented Architecture (SOA) holds that a complex enterprise IT system should be divided along different, reusable granularities, organizing a group of functionally related service providers together to serve consumers. Its purpose is to solve the information silo problem caused by different IT resources within an enterprise being unable to interconnect.