WEBSOCKET Test Online
The websocket online test tool can be used as a websocket client to connect to the websocket server of the intranet or public network, and supports receiving and sending text messages in real time. Websocket is a new protocol under HTML5. It realizes the full duplex communication between browser and server, which can better save server resources and bandwidth, and achieve the purpose of real-time communication. Like HTTP, it transmits data through the established TCP connection, but its biggest difference from HTTP is that websocket is a two-way communication protocol. After the connection is established, the websocket server and client can actively send or receive data to each other, just like socket; Like TCP, websocket needs to establish a connection first. Only after the connection is successful can they communicate with each other.
IP Number Converter
IP and numbers are converted to each other, and the converted number is a 32-bit unsigned integer number. IPv4 address is a 32-bit binary number, which is usually divided into 4 "8-bit binary numbers" (that is, 4 bytes). IP addresses are usually expressed in the form of (a.b.c.d) by "dotted decimal", where a, B, C and D are decimal integers between 0 and 255. For example, the dotted decimal IP address (18.104.22.168) is actually a 32-bit binary number (01100100.00000100.00000101.00000110).
DNS Lookup Online
The DNS record query tool provides DNS A-type, CNAME type, MX type and TXT type record query functions. Domain name system (English: domain name system, abbreviation: DNS) is a service of the Internet. As a distributed database that maps domain names and IP addresses to each other, it can make it easier for people to access the Internet. DNS uses TCP and UDP ports 53. At present, the length limit for each level of domain name is 63 characters, and the total length of domain name cannot exceed 253 characters.
User Agent Analysis Online
User agent online analysis. The Chinese name of user agent is user agent, abbreviated as UA. It is a special string header that enables the server to identify the operating system and version used by the customer, CPU type, browser and version, browser rendering engine, browser language, browser plug-in, etc.
HTTP Response Status Code Full List
Online HTTP response status code query. The HTTP status code indicates the processing status of HTTP requests. It is generally divided into five categories: information, success, redirection, client error, and service error. Common examples include 200 indicating successful response, 404 not found, 500 server internal error, etc.