| # Alt-Svc |
| |
| curl features support for the Alt-Svc: HTTP header. |
| |
| ## Enable Alt-Svc in build |
| |
| `./configure --enable-alt-svc` |
| |
| (enabled by default since 7.73.0) |
| |
| ## Standard |
| |
| [RFC 7838](https://tools.ietf.org/html/rfc7838) |
| |
| # Alt-Svc cache file format |
| |
| This a text based file with one line per entry and each line consists of nine |
| space separated fields. |
| |
| ## Example |
| |
| h2 quic.tech 8443 h3-22 quic.tech 8443 "20190808 06:18:37" 0 0 |
| |
| ## Fields |
| |
| 1. The ALPN id for the source origin |
| 2. The host name for the source origin |
| 3. The port number for the source origin |
| 4. The ALPN id for the destination host |
| 5. The host name for the destination host |
| 6. The host number for the destination host |
| 7. The expiration date and time of this entry within double quotes. The date format is "YYYYMMDD HH:MM:SS" and the time zone is GMT. |
| 8. Boolean (1 or 0) if "persist" was set for this entry |
| 9. Integer priority value (not currently used) |
| |
| # TODO |
| |
| - handle multiple response headers, when one of them says `clear` (should |
| override them all) |
| - using `Age:` value for caching age as per spec |
| - `CURLALTSVC_IMMEDIATELY` support |
