At one point of time, `http://to` resolved to a "It works!" page [1]. I've always thought it would be cool to have a URL shortener with links such as `https://to/library` or something similar. Oh, how much fun running your own TLD would be...
Shortest URLs on the Internet
11–20 of 208 posts
Re: Shortest URLs on the Internet
#12Close second: http://1.1
Why does 1.1 resolve to 1.0.0.1? I don't recall this being in any of the documents about CIDRs. Are browsers implicitly mapping IPv4 addresses temporarily into IPv6 addresses during parsing, such that "1.1" becomes "1::1", and then gets IPv6 abbreviated-form expansion applied to it?
I'm also curious. Especially since curl 7.64.1 (Release-Date: 2019-03-27, on macOS) says:
% curl 'http://1.1/'
error code: 1003
% curl 'http://1.1/'
301 Moved Permanently
301 Moved Permanently
cloudflare
Re: Shortest URLs on the Internet
#13Close second: http://1.1
Why does 1.1 resolve to 1.0.0.1? I don't recall this being in any of the documents about CIDRs. Are browsers implicitly mapping IPv4 addresses temporarily into IPv6 addresses during parsing, such that "1.1" becomes "1::1", and then gets IPv6 abbreviated-form expansion applied to it?
There's some weird legacy parsing for IPv4 addresses with less than four components. 1.2.3.4 can be represented equivalently as 1.2.772, 1.131844, or 16909060. (Note that 772 = 0x0304, 131844 = 0x020304, and 16909060 = 0x01020304.)
TL;DR: the second "1" in "1.1" is treated as a 24-bit integer.
Longer explanation: https://blog.dave.tf/post/ip-addr-parsing/
Re: Shortest URLs on the Internet
#14Close second: http://1.1
Why does 1.1 resolve to 1.0.0.1? I don't recall this being in any of the documents about CIDRs. Are browsers implicitly mapping IPv4 addresses temporarily into IPv6 addresses during parsing, such that "1.1" becomes "1::1", and then gets IPv6 abbreviated-form expansion applied to it?
https://en.m.wikipedia.org/wiki/IPv4#Addressing
> IPv4 addresses may be represented in any notation expressing a 32-bit integer value.
I remember reading a man page that explained this really succinctly but I cannot remember which one it was. A tool like ping I believe.
Re: Shortest URLs on the Internet
#15Close second: http://1.1
Why does 1.1 resolve to 1.0.0.1? I don't recall this being in any of the documents about CIDRs. Are browsers implicitly mapping IPv4 addresses temporarily into IPv6 addresses during parsing, such that "1.1" becomes "1::1", and then gets IPv6 abbreviated-form expansion applied to it?
I suspect it gets mapped to 1.0.0.1 because no other resolution is possible. Any other locations for the two zeros results in an invalid IP (either starting or ending in 0).
Re: Shortest URLs on the Internet
#16Any FTP urls? I'm sure there are protocols with shorter schemes, but FTP is still semi-supported.
Re: Shortest URLs on the Internet
#17Earlier quoted context omitted.
Why does 1.1 resolve to 1.0.0.1? I don't recall this being in any of the documents about CIDRs. Are browsers implicitly mapping IPv4 addresses temporarily into IPv6 addresses during parsing, such that "1.1" becomes "1::1", and then gets IPv6 abbreviated-form expansion applied to it?
I suspect it gets mapped to 1.0.0.1 because no other resolution is possible. Any other locations for the two zeros results in an invalid IP (either starting or ending in 0).
Ending in 0 is valid; you can have 1.0.1.0/23 as an IP.
Re: Shortest URLs on the Internet
#18Earlier quoted context omitted.
Why does 1.1 resolve to 1.0.0.1? I don't recall this being in any of the documents about CIDRs. Are browsers implicitly mapping IPv4 addresses temporarily into IPv6 addresses during parsing, such that "1.1" becomes "1::1", and then gets IPv6 abbreviated-form expansion applied to it?
I'm also curious. Especially since curl 7.64.1 (Release-Date: 2019-03-27, on macOS) says: % curl 'http://1.1/' error code: 1003 while curl 7.85.0 (Release-Date: 2022-08-31, on FreeBSD) says: % curl 'http://1.1/' 301 Moved Permanently 301 Moved Permanently cloudflare
That is because their http:// site redirects to https://
Re: Shortest URLs on the Internet
#19[deleted]
Re: Shortest URLs on the Internet
#20You don't need the http:// for pn. (At least in firefox on my laptop) pn./ suffices.