In the Readme of this project, it is proposed to make some kind of http/0.9 request, what does this mean?

2 Answers

HTTP/0.9 is a one-line protocol. Its main points are:

• Initial version of HTTP - a simple client-server, request-response, telenet-friendly protocol
• Request nature: single-line (method + path for requested document)
• Methods supported: GET only
• Response type: hypertext only
• Connection nature: terminated immediately after the response
• No HTTP headers (cannot transfer other content type files), No status/error codes, No URLs, No versioning

For details see the article
Evolution of HTTP — HTTP/0.9, HTTP/1.0, HTTP/1.1, Keep-Alive, Upgrade, and HTTPS.

An example of a HTTP/0.9 request:

From this w3.org source entitled The Original HTTP as defined in 1991:

This document defines the Hypertext Transfer protocol (HTTP) as originally implemented by the World Wide Web initaitive software in the prototype released. This is a subset of the full HTTP protocol, and is known as HTTP 0.9.

Futhermore:

This restricted protocol is very simple and may always be used when you do not need the capabilities of the full protocol which is backwards compatible.

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