Thermal renewal and its principle

Hot update ： yes app Common update methods , Just download the code to install the update

working principle ： Develop code dynamically , Enable developers to repair without releasing a new version bug And publishing functions , Bypass Apple's audit mechanism , Avoid the cost of long-term review and repeated rejection .

advantage ：(1) Fast , You can bypass Apple's audit , Fast update ;

           (2) Update resource package small , Generally in 1M about , The user is not connected wifi You can also download at will

Safe hidden trouble ： Because the software hot update bypassed Apple's audit , Hackers can submit the normal version , Lead to safety hazards through hot update .

Principle of thermal renewal ：(1) How to load update files ( Patch pack ) (2) How to replace the old class with the repaired class

Hot renewal plan ：(1) Bottom layer replacement scheme (2) Class load substitution scheme (3)Instant Run

Reference resources ：  Principle of thermal renewal Up to now, I have guessed the principle of antipyretic update. There are three underlying replacement schemes, class loading schemes Instant Run This article is mainly about Class loading and Instant Run The hot update class loading scheme in two ways needs to be understood first Android Class loading , You can see that what is used here is Android Medium DexClassLoader Class loader is briefly introduced below Android Class loading BootClassLoaderDexClass...https://blog.csdn.net/hjiangshujing/article/details/103941599
Software hot update principle List of articles Instant Run summary Gradle TransformInstant Run Principle of repair ClassLoader Fix code Instant Run summary Instant Run yes Android Studio2.0 After that, a new operating mechanism is added , It can reduce the second and subsequent construction time of developers . In the absence of Instant run Before , The process of compiling and deploying the application is shown in the following figure ： Traditional compilation deployment , Need to be reinstalled APP And restart A...https://blog.csdn.net/CodeFarmer__/article/details/102990603

Front end hot renewal principle -  One 、websocket brief introduction -  Two 、 Heat and new principles -  3、 ... and 、 Instance analysis -  Four 、 summary websocket The introduction is in h5 Prior to the launch , The only mechanism for browser applications to communicate with the server is http agreement ,http Is a stateless network protocol , The front end sends a request to the server , The server gives an answer , The server cannot actively initiate communication with the client , This design is mainly to save bandwidth resources , There is no need to maintain a long connection between the client and the server. In the early stage, a browser is needed, even if communication https://blog.csdn.net/yusirxiaer/article/details/73182262