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Catalog     Basic concepts Code and examples   Basic concepts Look at the signal before putting in the code: [signal] void QAbstractSocket::stateChanged(QAbstractSocket::SocketState socketState) This information is triggered when the so ...

What is it? ss is the abbreviation of Socket Statistics. As the name implies, the ss command can be used to obtain socket statistics, which can display content similar to netstat. But the advantage of ss is that it can display more detailed info ...

A in AIO is Asynchronous, AIO is asynchronous IO. It is asynchronous and non-blocking. The client's I/O requests are processed by the OS and then the server application is notified to start the thread. Generally, our business processing logic will become a callback function, waiting for the IO operation to be completed and triggered automatic ...

What is a WebSocket? WebSocket is a protocol for full duplex communication over a single TCP connection.Here we find an interesting word:'Full duplex', so let's get a simple idea of how to communicate! Single Work In both sides of communication, one party is fixed as the sender and the other as the receiver.Information can only be transmitted i ...

Direct exchange of two digits Python provides an intuitive way to assign and exchange (variable values) in a line of code. As follows: x, y = 10, 20 print(x, y) x, y = y, x print(x, y) #1 (10, 20) #2 (20, 10) In the above code, a new tuple is fo ...

Starting with Java 1.4, in order to replace Java IO and network-related APIs and improve the running speed of programs, Java has provided a new non-blocking API for IO operations, namely Java NIO. There are three core components in NIO: Buffer, Channel and Selector. NIO operates on Channel (channel) and Buffer (buffer). Data is always read fr ...

Concurrent optimization of nginx single machine for 1wCatalogab toolIntegral Optimizing ThoughtSpecific optimization ideasWrite scripts to optimize concurrent configurationPerformance statistics toolstipssummary ab toolab -c 10000 -n 200000 http://localhost/index.html [root@study02 ~]# ab -c 10000 -n 100000 http://192.168.0.217/index.htmlThis i ...

1. Project Background I need to receive the location information of the GPS device through UDP. The data package structure defined by the manufacturer is roughly as follows: Packet header: describe Number of bytes Command flag 2 version num ...

Integrate Memcached and Redis access Reference resources Integrating Memcached and Redis access source code used by flea-frame-cache rely on No more, see my blog entry below: Memcached access used by flea-frame-cache Redis access used by flea-f ...

These two days watching RPC is really a bit of a mystery, some things to see forgotten, forgotten to see! Plus there are some messy things, I feel that these two days need to sort out ideas, and then according to the principle, to achieve a RPC frame ...