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现在我curl -I用来检索标题。

在浏览器即将采用 HTTP/2 时，网站是否会采用不同的方式使用 HPACK 提供标头，这将使我对 curl 命令的使用无效？

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2 回答 2

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Yes, you can use curl to see and send HTTP headers with HTTP/2 just as you do with HTTP/1.

curl supports HTTP/2 and it is implemented as a sort of translation layer. It means it shows and "pretends" that headers work 1.1 style. It shows headers as text and it sends headers in callbacks like they were done with 1.1. We made it this way to make scripts and applications get a very smooth and basically invisible transition path to HTTP/2 with curl.

Internally that is of course done by decompressing received headers before showing them, and showing them before compressing them when sending them.

于 2015-03-06T21:40:55.187 回答
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我相信这取决于 curl 版本。在 curl 7.36.x IIRC 中添加了 HTTP/2 吗？不是所有发行版都有那个版本吗？

这是 curl 7.41.0 over HTTP/2 针对https://google.com

curl --http2 -I -v https://google.com
* Rebuilt URL to: https://google.com/
*   Trying 173.194.123.1...
* Connected to google.com (173.194.123.1) port 443 (#0)
* ALPN, offering h2-14, http/1.1

* ALPN, server accepted to use h2-14
* Server certificate:
*        subject: C=US; ST=California; L=Mountain View; O=Google Inc; CN=*.google.com
*        start date: 2015-03-11 16:13:43 GMT
*        expire date: 2015-06-09 00:00:00 GMT
*        subjectAltName: google.com matched
*        issuer: C=US; O=Google Inc; CN=Google Internet Authority G2
*        SSL certificate verify ok.
* Using HTTP2

编辑：更正，curl --http2 需要编译 nghttp2 才能工作https://nghttp2.org/

curl --version 
curl 7.41.0 (x86_64-unknown-linux-gnu) libcurl/7.41.0 OpenSSL/1.0.2b zlib/1.2.8 nghttp2/0.7.8-DEV
Protocols: dict file ftp ftps gopher http https imap imaps pop3 pop3s rtsp smb smbs smtp smtps telnet tftp 
Features: AsynchDNS IPv6 Largefile NTLM NTLM_WB SSL libz TLS-SRP HTTP2 UnixSockets
于 2015-03-22T10:25:33.147 回答