Programmer Group

1. zlib GNUzlib compression Zlib module provides the underlying interface for many functions in the zlib compression library of GNU Project. 1.1 processing data in memory The simplest way to use zlib requires that all data to be compressed or decompressed be stored in memory. import zlib import binascii original_data = b'This is the original ...

What I wrote last time Introduction and use of ZeroMQ (1) Pipeline pattern PipeLine mode is used for task allocation, usually in multi-level PipeLine, one or several nodes push the work to many workers, and then push the results to one or several collectors in turn. This pattern is reliable in most cases, because it does not drop messages un ...

The previous article introduced the logical backup tool mysqldump. This article will demonstrate the second part of data backup and recovery by using xtrabackup, a more popular physical backup tool. 1. Installation of xtrabackup tool 1.1 installation dependency package /* xtrabackup You need to install the related dependency package to use th ...

 Infi-chu: http://www.cnblogs.com/Infi-chu/ 1, Set up proxy 1.urllib #HTTP proxy type from urllib.error import URLError from urllib.requests import ProxyHandler,build_opener proxy='127.0.0.1:9743' # proxy='username:password@127.0.0.1:9743 'username and password are placed at the beginning proxy_handler=ProxyHandler({ 'http':'http://'+proxy, ...

[overview] Implement a group chat tool. The client messages participating in the chat are broadcast through the server. It mainly consists of two parts: chat server and chat client. Chat server function overview: 1. Monitor the access and disconnection of all clients 2. When client A accesses the chat room, send the access message to other clie ...

error handling dynamic link In Lua, dynamic links are considered the parent of all other mechanisms So you can use it to dynamically load any other mechanism not in Lua Two parameters required for package.loadlib Full path to the library Correct function name The loadlib function loads the specified library and link ...

Netty programming NIO programming 1. Solve the thread resource limitation 2. Low efficiency of thread switching 3. Resolve that IO read and write are in bytes Netty programming 1. Introduction to netty 2. Use of netty Netty package sticking and unpacking: 1. Sticking problem: 2. unpack Specific ...

0. Preface It's been a while since I left my job. The epidemic hasn't passed yet. If I can't go out, I still don't go out. I feel like I've been living a long time every day. I haven't found a job yet. I'm just looking for LDD3 recently. I transplanted the AR8031 driver from my previous job. I just to ...

This article records an example of using socket to communicate on windows. The code comes from the Internet. As time goes by for a long time, I didn't bookmark at that time, and now it's not easy to find a source. Some key code fragments are given in this paper. On the one hand, they are used to cons ...

1, Brief introduction of socket protocol What is WebSocket and what are its advantages WebSocket is a persistent protocol, which is relative to http non persistent. Application layer protocol For example, the life cycle of http1.0 is defined by request, that is, a request and a response. For HTTP, this session between client and server ends ...