Both schemes use an HTTP upgrade mechanism to upgrade to the WebSocket protocol.
From the en.wikipedia.org
The servlet specification defines a set of APIs to service mainly HTTP requests.
From the en.wikipedia.org
It includes classes that implement FTP and HTTP clients and support DNS lookups.
From the en.wikipedia.org
To send an HTTP request, the send method of the XMLHttpRequest must be invoked.
From the en.wikipedia.org
The first part of an HTTP URL consists of the DNS host name plus the domain name.
From the en.wikipedia.org
For example, every time I visit a web page I intentionally use the HTTP protocol.
From the techcrunch.com
The Mozilla name was also used as the User-Agent in HTTP requests by the browser.
From the en.wikipedia.org
Sometimes people prefer hosting their files on a publicly accessible HTTP server.
From the en.wikipedia.org
More importantly, Art.sy is serving an HTTP 301 response redirecting to Artsy.net.
From the techcrunch.com
More examples
Hypertext transfer protocol: a protocol (utilizing TCP) to transfer hypertext requests and information between servers and browsers
The Hypertext Transfer Protocol (HTTP) is a networking protocol for distributed, collaborative, hypermedia information systems. HTTP is the foundation of data communication for the World Wide Web.
HTTP(P2P) is a protocol based on HTTP. It is intended to improve page and object retrieval performance when web servers suffer server-side congestion. Examples of server-side congestion include the Slashdot and Flash crowd effects. ...
(HTTPD) A web server is a computer program that delivers (serves) content, such as web pages, using the Hypertext Transfer Protocol (HTTP), over the World Wide Web. The term web server can also refer to the computer or virtual machine running the program.
(HTTPS) When used in the first part of a URL (the part that precedes the colon and specifies an access scheme or protocol), this term specifies the use of HTTP enhanced by a security mechanism, which is usually SSL.
(HTTPS) A secure, SSL-enabled version of HTTP.
(HTTPS) Hypertext Transport Protocol Secure. A variant of HTTP used for accessing secure Web servers. See also "SSL."
(HTTPS) Hypertext Transfer Protocol Secure. Often used in intra company internet sites. Passwords are required to gain access.
(HTTPS) This is the secure version of the HTTP protocol, where data transmission between your computer and the server takes place in an encrypted 'tunnel'. ...