Programmer Think

When the browser accesses the server, it will encapsulate the parameter data, protocol version and request header information submitted by the user into a request message (i.e. request packet) and send it to the server. The Request message received by the server (such as Tomcat) will be encapsulated in the Request object. Programmers can ge ...

3, Nine built-in objects of JSP What are built-in objects? The built-in objects of JSP refer to the built-in Java objects in the JSP page system by default. These objects can be used without explicit declaration by developers. In JSP pages, you can access each other with JSP pages and Servlet environment by accessing JSP built-in objects. Each ...

Recently, I encountered a process suspension problem when using Python's multiprocessing module. Let's record it here. First, the minimum code of a multi process application is given. import multiprocessing as mp def produce(q): """producer""" for i in [1, 2, 3, 4, 5, 6, 7, 8, 9]: q.put(i) print(f"Producer quit.") def c ...

Foreword Share a case of using some crawler technology to simply crawl articles from media web pages as needed and save them to the local designated folder for reference only. In the learning process, do not visit the website frequently and cause web page paralysis. Do what you can!!! Crawling demand Crawl address: Construction Archives - c ...

Request forwarding Request forwarding: after a request from the client arrives, it is found that other servlets are needed to realize the function. The client browser sends a request to servlet a to realize some functions with the help of servlet a, but servlet a cannot complete this function. At this time, it finds that servlet B can real ...