The http query tool can simply query the head request header information of the specified webpage and the title, keywords, description and content of the webpage, so as to more intuitively understand the basic status of the webpage.
The head requests to obtain the basic logo and certification information of the webpage, and can check whether the status of the webpage has been modified by some programs, and the validity of resources or links
Common status codes are:
200: Successfully processed the request 301: Permanent web page redirection 302: Temporary redirection 400: Request statement error 403: Server rejected the request 404: Page not found 500: Server error
Common basic parameters are:
Server represents the software name of the website server
Content-Type document MIME type
Content-Length The number of bytes actually transmitted by the web page connection
Date current time
Last-Modified The last modification time of the webpage file
Connection type of connection
Status code returned by HTTP/2