Use node. js + socket. io + redis to implement basic chat room scenarios
This article introduces the basic operations of Redis and Redis-cli in the redis database and its basic operations. among them, the publish-subscribe mechani
Use Socket. io to push messages in real time, and socket. io to push messages in real time.
Project Background
There is a social network module in a recently written project. You need to implement this function: when a user is liked, commented, or followed, the server needs to push a message to the user in real time. T
Basic Application of socket. io tutorial (2) socket. io tutorial
Preface
Socket. IO supports timely, bidirectional, and event-based communication. It can work on every platform, every browser, and every device, with the same relia
Introduction Java NiO, introduced from JDK1.4, provides a completely different way of working with standard IO. The NIO package (java.nio.*) introduces four key abstract data types that work together to address some of the problems in traditional I/O classes. 1, Buffer: It is a linear table structure that contains data and is used for reading and writing. It also provides a special class for I/O operations for memory-mapped files. 2, Charset: I
The Socket. IO instance in node. js, node. jssocket. io
1. Introduction
First Socket. IO Official Website: http://socket.io
The official website is very concise, and there is no API documentation. There is only one simple "How to use" for reference. Because
Node. js uses the socket. io method, node. jssocket. io
You can use socket. io to create a socket. io server. However, this server depends on a created http server.
After the http serve
Node. js and Socket. IO extend Django's real-time processing functions
This article mainly introduces the use of Node. js and Socket. i/O extends Django's real-time processing function. The real-time asynchronous processing function is quite powerful. The example given in this article is to create a real-time chat room. For more information, see
Today, our goal i
Multi-room chat and socket. ioexpress Based on socket. io + express
Socket. io Introduction
Socket. IO is an open-source WebSocket library that implements the WebSocket server through N
just appends to the buffer. */}Based on the functions defined above, we can create a buffer Rio object:/* 根据上面的方法定义的流为内存时使用的buffer rio对象 */staticconst rio rioBufferIO = { rioBufferRead, rioBufferWrite, rioBufferTell, rioBufferFlush, NULL, /* update_checksum */ 0, /* current checksum */ 0, /* bytes read or written */ 0, /* read/write chunk size */ NULL0/* union for io-specific
, directly submit the command + user buffer to the kernel driver, and then return immediately. At this time, the user thread can continue to run and do other things.
When you want to know the command completion status, you can use getqueuedcompletionstatus to obtain the completed request and data.
Therefore, you can submit a large number of IO requests first, and then process and return them slowly.
The reason why iocp is more efficient than epoll is
Node socket. io event Usage Details, nodesocket. io
The socket. io class library can not only send messages to each other, but also send events to each other through the emit method of the socket port object.
In the previous event
'); // open the Socket socket. onopen = function (event) {// send an initialization message socket. send ('I am the client and I \' m listening! '); // Listen to the message socket. onmessage = function (event) {console. log ('client received ed a message', event) ;}; // listen to the
Broadcast messages of socket. io in node. js, node. jssocket. io
After multiple clients establish a connection with the server. the io () server has a sockets attribute. The attribute value is all socket objects connected to the client. you can use the send method or emit me
This article mainly introduces the use of Node. js and Socket. i/O extends Django's real-time processing function. asynchronous real-time processing is quite powerful. the example in this article is to create a real-time chat room. if you need it, refer to the following example, our goal is to use Django, Redis, and Socket. I
Use socket. io and node. js to build a timely communication system, socket. ionode. jsSocket. IO is a websocket library, including the client js and the server nodejs. Official Address: http://socket.ioUse socket. io and nodejs to
Android-Socket causes the Socket to close and cannot send and receive data after the IO stream is closed. androidio
Use Socket to send data as an example:
When sending data, declare: DataOutputStream OS = new DataOutputStream (socket. getOutputStream ());
Recently, I encount
1.I/O Basic Knowledge 1.1What is a file descriptor? In a network, a socket object is a 1 file descriptor, and in a file, 1 file handles (that is, the files object) are 1 file descriptors. In fact, it can be understood as a "pointer" or "handle", pointing to 1 socket or file object, when the file or socket changes, the object corresponding to the document descript
This article introduces socket in depth. i/O related information, which has previously been introduced to socket. i/O basic tutorials and applications. This article provides a more in-depth introduction to socket. i/O usage. For more information, see. This article introduces socket in depth. i/O related information, wh
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