1xx Informational (Request received, continuing process.)
100 Continue
This means that the server has received the request headers, and that the client should proceed to send the request body (in the
case of a request for which a body needs to be sent; for example, a POST request). If the request body is large, sending it to a
server when a request has already been rejected based upon inappropriate headers is inefficient. To have a server check if the
request could be accepted based on the request's headers alone, a client must send Expect: 100-continue as a header in its initial
request and check if a 100 Continue status code is received in response before continuing (or receive 417 Expectation Failed and not
continue)
101 Switching Protocols
102 Processing (WebDAV)
WebDAV was an Internet Engineering Task Force Working Group. The abbreviation stands for Web-based Distributed
Authoring and Versioning. The term also refers to the set of extensions to the HTTP protocol that the group defined which
allows users to collaboratively edit and manage files on remote web servers. The WebDAV protocol's aim was to make the
World Wide Web a readable and writable medium