AFAICT http2 support is currently intentionally dropped from curl
because the dependency nghttp2-dev is not in the 'main' archive, but in
the community supported 'universe' archive.
Quoting the curl package changelog:
curl (7.52.1-4ubuntu1) zesty; urgency=low
* Merge from Debian unstable. Remaining changes:
- Drop dependencies not in main:
+ Build-Depends: Drop libssh2-1-dev, and libnghttp2-dev.
+ Drop libssh2-1-dev from binary package Depends.
+ debian/control: drop --with-nghttp2
-- Gianfranco Costamagna <locutusofb...@debian.org> Sun, 09 Apr 2017
13:07:51 +0200
https://launchpad.net/ubuntu/+source/curl/+changelog#detail_curl_7.52.1-4ubuntu1
So, to resolve this issue it would seem that Canonical first must be
convinced to take on official support for the nghttp2 package. Not sure
how we're supposed to do that?
Cheering from the sideline has obviously not worked very well for this
issue so far. :)
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https://bugs.launchpad.net/bugs/1567697
Title:
libcurl is missing http2 support
Status in curl package in Ubuntu:
Confirmed
Bug description:
libcurl supports HTTP/2.0 through libnghttp2, but the package on
Ubuntu is not compiled with it.
Alternatively, a libcurl4-(gnutls|openssl)-nghttp2 might be a good
idea.
See also: https://curl.haxx.se/docs/http2.html
curl CLI tool should not need an update, as it already has the
commandline switches, but when you use them it comes back with
unsupported protocol.
drwilco@eris:~$ curl --http2 www.google.com
curl: (1) Unsupported protocol
drwilco@eris:~$ lsb_release -rd
Description: Ubuntu Xenial Xerus (development branch)
Release: 16.04
root@eris:~# apt-cache policy libcurl3
libcurl3:
Installed: 7.47.0-1ubuntu2
Candidate: 7.47.0-1ubuntu2
Version table:
*** 7.47.0-1ubuntu2 500
500 http://us.archive.ubuntu.com/ubuntu xenial/main amd64 Packages
100 /var/lib/dpkg/status
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