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Write here is to make a summary for easy viewing when forgetting, and if there are mistakes in the article, please spray me haha, welcome to correct. It would be nice to help others. Agreement The so-called protocol is to specify a series of rules that enable the two or more parties who want to communicate to communicate normally. If we speak C ...

RabbitMQ message queue monitoring API Request address http://ip Port number/interface name It is recommended that the monitoring data collection interval be 60 seconds. HTTP API URL HTTP request type Interface Meaning /api/connections GET Get all open connections under the current RabbitMQ cl ...

In the previous section, we learned about the sending process of Request, but in the case of bad network conditions, what can we do if there is an exception? At this time, if we do not handle these exceptions, the program is likely to report errors and terminate the operation, so exception handling is very necessary. Urllib's error module defi ...

Based on MySQL Router to achieve high availability, read-write separation, load balancing and so on, MySQL Router can be said to be a very lightweight middleware.Looking at the principle of MySQL Router, it is not complicated, and the principle is not difficult to understand. In fact, it is a proxy function similar to VIP. One MySQL Router has ...

Single user login, that is, in an application, only one user can login online, one user can login and be immediately offline on other devices. After confirmation, the login loading on the device is cleared and the login interface is returned. uni-app is currently able to package Android, IOS, WeChat, PayPal and H5 with only one set of code by ...

I just learned vue, looked at the components of elementUI, and wrote and played by myself. The basic needs are as follows Check all boxes, Pagination Like iview, the table header is customized by passing in an array of options, and the table content is controlled by passing in an array of data. It's ...

RST represents a connection reset used to close connections that no longer need to exist.Normally it means an abnormal closing of the connection, distinguishing it from a normal closing of the connection after four breakups. The three conditions for generating RST are: The SYN destined for a port arrives, but there is no server listening on th ...

Learning Catalogue: Network programming computer network It refers to connecting multiple computers with independent functions in different geographical locations and their external equipment through communication lines. Under the management and coordination of network operating system, network manage ...

socket programming is provided in Java to build client and server side TCP Steps to build the server side: (1) bind: Bind port number (2) listen: listen for client connection requests (3) accept: an instance of returning a connection to the client (4) read/write: read/write operations, i.e., interactio ...

The previous section describes one of the ways to reuse I/O, select. This paper will discuss the second way of poll ing. I. Polling 1. Functional prototype Int poll(struct pollfd *fds, int nfds, int timeout); Fds: Specify the set of events being monitored; pass the array header address, defined ...