Introduction to Python Crawler [4]: Unlogged Picture Crawling on American Airlines

Unlogged Pictures on American Airlines Network--Brief Introduction The last article has been written for a long time. Next, I will continue to finish the crawler of American Airlines. The crawler in this set of tutorials may not add much valuable technical points to your actual work, because it is onl ...

Posted on Sat, 20 Jul 2019 07:16:26 -0700 by yum-jelly

python's Network Programming Package

I. Sticking Pack Sticking phenomenon # Server import socket import subprocess phone = socket.socket() phone.bind(('127.0.0.1',8888)) phone.listen(5) while 1: conn,addr = phone.accept() while 1: cmd = conn.recv(1024) ret = subprocess.Popen(cmd.decode('utf-8'), shell=True, ...

Posted on Sat, 20 Jul 2019 00:42:58 -0700 by nashsaint

Generation and cleanup of linux c zombie processes

Generation and cleanup of linuxc zombie processes What is a zombie process A zombie process is one in which the parent process has exited (the parent process has not waited (call wait/waitpid) and becomes a zombie process without process acceptance after dead. How does the zombie process come about When a process calls the exit command to end i ...

Posted on Wed, 17 Jul 2019 09:27:49 -0700 by zippers24

Distributed File Management System _FastDFS Cluster

Brief introduction 1. The relationship between client storage tracker First, a graph is used to explain how users access a file managed by DFS.   Generally speaking, a server has only one storage server, and multiple storage servers can form a group. The data of storage servers can be synchronized automatically between the same group (backup a ...

Posted on Tue, 16 Jul 2019 11:37:15 -0700 by KirstyBurgoine

Spring MVC uses Alipay interface to complete online payment.

The online payment function should be used in the project. The commonly used online payment methods are Alipay and WeChat. Here I use Alipay payment, Alipay has the advantage that he has a sandbox mode, even if there is no qualification to apply for channels, you can also experience an online payment. Step 1: Improve Sandbox Information ...

Posted on Mon, 15 Jul 2019 13:06:38 -0700 by PigsHidePies

POLL System Call for I/O Multiplexing

The poll function is similar to the select function and can also realize I/O multiplexing. The declaration of the poll function is as follows: #include <poll.h> int poll(struct pollfd *fdarray, unsigned long nfds, int timeout); The first parameter is a pointer to the first element of a structured array. Each array element is a pollfd s ...

Posted on Mon, 15 Jul 2019 12:12:56 -0700 by Dustin013

EventBus Communication Skiller

1. Introduction to EventBus EventBus is a lightweight framework for Android event publishing/subscribing developed by Green Robot. It has the following characteristics: concise code and is a publishing and subscribing design pattern (observer design pattern). EventBus can replace Android's traditional Intent, Handler, Broadcast or interface fun ...

Posted on Sun, 14 Jul 2019 16:47:55 -0700 by sunnyk

Talk MVVM Design Mode

Talk MVVM Design Mode MVC design mode is the oldest one we are familiar with and the most common design mode for mobile development. Compared to MVC, in MVVM, M and V are the same as M and V in MVC. VM is the ViewModel. In MVC, in C, we process control addition, data logic (sending network requests, dictionary conversion model) and business l ...

Posted on Sat, 13 Jul 2019 10:19:03 -0700 by ovisopa

Solutions to overlap in Android using Fragment

Reprinted from: http://blog.csdn.net/jiangxuqaz/article/details/51707031 Reference resources: http://stackoverflow.com/questions/16189088/overlapping-hidden-fragments-after-application-gets-killed-and-restored http://stackoverflow.com/questions/18274732/android-fragments-overlapping-issue?answertab=active#tab-top Fragment ov ...

Posted on Fri, 12 Jul 2019 16:51:51 -0700 by soul

Summary of Java Learning in the 2018-2019 School Year

First: Introduction to Java Introduction to Java Language: Java It's a door. Object-oriented Programming languages, not only absorb C++ The various advantages of language, but also discarded the difficult to understand in C++. Multiple Inheritance,Pointer As a result, the Java language has two characteristics: powerful and easy to use. The ch ...

Posted on Fri, 12 Jul 2019 15:48:44 -0700 by Elizabeth