Learn more about the HTTP protocol

● Hypertext Transfer Protocol -- HTTP/1.1



Complete information about HTTP 1.1 specifications. This is an English document. If you want to learn or understand the HTTP protocol, this is an essential document.

● HTTP status code



Although the document above contains all the information about the HTTP protocol, you generally only need to know the status code returned by the HTTP protocol, and analyze and solve the problem based on the status code information. The HTTP Status Code provided by the logging script provides the information.

● HTTP status code [msdn]

The HTTP status code on Microsoft msdn provides some suggestions for using HTTP protocol for error handling.