让 curl 支持 HTTP2 我们需要安装 nghttp2（http2 的 C 语言库）

源码安装

安装 nghttp2

git clone https://github.com/tatsuhiro-t/nghttp2.git
cd nghttp2
autoreconf -i
automake
autoconf
./configure
make
sudo make install

编译 curl

wget http://curl.haxx.se/download/curl-7.46.0.tar.bz2
tar -xvjf curl-7.46.0.tar.bz2
cd curl-7.46.0
./configure --with-nghttp2=/usr/local --with-ssl
sudo make && make install

编译时注意观察
HTTP2 support: enabled (nghttp2)

echo '/usr/local/lib' > /etc/ld.so.conf.d/local.conf
ldconfig

验证

curl --version
curl 7.64.1 (x86_64-pc-linux-gnu) libcurl/7.64.1 OpenSSL/1.0.2k zlib/1.2.7 nghttp2/1.38.0-DEV
Release-Date: 2019-03-27
Protocols: dict file ftp ftps gopher http https imap imaps pop3 pop3s rtsp smb smbs smtp smtps telnet tftp 
Features: AsynchDNS HTTP2 HTTPS-proxy IPv6 Largefile libz NTLM NTLM_WB SSL UnixSockets

测试

curl --http2 -I https://nghttp2.org

HTTP/2 200 
date: Mon, 15 Apr 2019 12:53:49 GMT
content-type: text/html
last-modified: Fri, 08 Mar 2019 12:33:02 GMT
etag: "5c8260fe-19d8"
accept-ranges: bytes
content-length: 6616
x-backend-header-rtt: 0.011655
strict-transport-security: max-age=31536000
server: nghttpx
via: 2 nghttpx
x-frame-options: SAMEORIGIN
x-xss-protection: 1; mode=block
x-content-type-options: nosniff

附注

 -I, --head     (HTTP/FTP/FILE) Fetch the HTTP-header only!

yum 安装

安装 yum 源

rpm -ivh http://mirror.city-fan.org/ftp/contrib/yum-repo/city-fan.org-release-2-1.rhel7.noarch.rpm

新建 yum 源(功能与 安装 yum 源 相同)

vim /etc/yum.repos.d/city-fan.repo

[cityfan]  
name=cityfan 
baseurl=http://www.city-fan.org/ftp/contrib/yum-repo/rhel7/x86_64/
enabled=1  
gpgcheck=0

更新curl

yum update curl

curl 支持 http2

原文：https://www.cnblogs.com/brookin/p/10713166.html