Programmer Group

Mapping operation The mapping in the index library is similar to the table structure in the database. To create a database table, you need to set the field name, type, length, constraint, etc; The same is true for the index library. You need to know what fields are under this type and what constraint information each field has. This is ...

We are most familiar with HTTP when learning network programming. Well, let's start with HTTP. First of all, we must understand the basic principles and actions of HTTP. Mastering the working principle of HTTP to a certain extent is very helpful for our following learning.1: Working mode    ① : establish a reliable TCP connection be ...

Understanding of content type of POST submitted data;     Content type refers to the content encoding type when http/https sends information to the server. contentType is used to indicate the type of data stream sent. The server uses a specific parsing method to obtain the data in the data stream according to the encoding type. In ne ...

catalogue 1. Send request     data parameter   timeout parameter Other parameters     Comparison between urlopen and Request Use Request for flexible configuration Advanced Usage Password verification Use of agents Cookie processing In Python 2, there are urllib and urllib libraries to send requests. In ...

scene The template uses conditional judgment to control the style of the page, which is the most common application. Vue provides two basic methods, one is the ternary operator we have talked about, and the other is v-if. Ternary operators control template styles Let's first look at the use of ternary operators to control the style of te ...

Today's article tells you a story and process of tracking down bugs. I have always believed that if something goes wrong, there must be demons, and so is the Bug in the program. I hope that through this Bug troubleshooting story, we can not only learn a series of knowledge points, but also learn how to solve problems and how to do things more ...

  Cause: HTTP API usage of EMQ X Basic authentication (opens new window) Using the HTTP API of EMQ X Basic authentication (opens new window) Method, id and password must be filled in AppID and AppSecret respectively. The default AppID and AppSecret are admin/public. You can modify and add AppID/AppSecret by selecting "management&quot ...

00. Preface Recently, when I was writing a web page, I needed the back-end websocket service. Because I didn't need too complex functions, the back-end chose to use the nodejs websocket module of nodejs. During the development process, it was found that http service was needed, but nodejs websocket could not implement http service, so it began ...

Use of Android retro fit 1, Overview 1. What is retrofit Retrofit is a popular network request framework. It can be understood as an enhanced version of okhttp. Okhttp is encapsulated at the bottom. To be exact, retrofit is the encapsulation of a RESTful http network request framework. Because the network request is essentially completed ...

Earlier, we introduced the handshake of WebSocket: C # implements WebSocket server: (01) handshake After the handshake is completed, both the client and the server can send and receive messages. WebSocket messages are sent and received in frames. 0. WebSocket frame Frame type Op There are six common frame types: valuetypeexplain0x00Continua ...