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curl

    1: # Alt-Svc
    2: 
    3: curl features **EXPERIMENTAL** support for the Alt-Svc: HTTP header.
    4: 
    5: ## Enable Alt-Svc in build
    6: 
    7: `./configure --enable-alt-svc`
    8: 
    9: ## Standard
   10: 
   11: [RFC 7838](https://tools.ietf.org/html/rfc7838)
   12: 
   13: # Alt-Svc cache file format
   14: 
   15: This a text based file with one line per entry and each line consists of nine
   16: space separated fields.
   17: 
   18: ## Example
   19: 
   20:     h2 quic.tech 8443 h3-22 quic.tech 8443 "20190808 06:18:37" 0 0
   21: 
   22: ## Fields
   23: 
   24: 1. The ALPN id for the source origin
   25: 2. The host name for the source origin
   26: 3. The port number for the source origin
   27: 4. The ALPN id for the destination host
   28: 5. The host name for the destination host
   29: 6. The host number for the destination host
   30: 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.
   31: 8. Boolean (1 or 0) if "persist" was set for this entry
   32: 9. Integer priority value (not currently used)
   33: 
   34: # TODO
   35: 
   36: - handle multiple response headers, when one of them says `clear` (should
   37:   override them all)
   38: - using `Age:` value for caching age as per spec
   39: - `CURLALTSVC_IMMEDIATELY` support