2019-03-03 05:17:52 -05:00
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# Alt-Svc
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curl features **EXPERIMENTAL** support for the Alt-Svc: HTTP header.
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## Enable Alt-Svc in build
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`./configure --enable-alt-svc`
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## Standard
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[RFC 7838](https://tools.ietf.org/html/rfc7838)
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2019-08-07 08:18:42 -04:00
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# Alt-Svc cache file format
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This a text based file with one line per entry and each line consists of nine
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space separated fields.
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## Example
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h2 quic.tech 8443 h3-22 quic.tech 8443 "20190808 06:18:37" 0 0
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## Fields
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1. The ALPN id for the source origin
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2. The host name for the source origin
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3. The port number for the source origin
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4. The ALPN id for the destination host
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5. The host name for the destination host
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6. The host number for the destination host
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2019-11-28 06:57:58 -05:00
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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.
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2019-08-07 08:18:42 -04:00
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8. Boolean (1 or 0) if "persist" was set for this entry
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9. Integer priority value (not currently used)
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2019-08-07 08:52:28 -04:00
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# TODO
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- handle multiple response headers, when one of them says `clear` (should
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override them all)
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- using `Age:` value for caching age as per spec
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- `CURLALTSVC_IMMEDIATELY` support
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