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−-*- mode: outline; coding: utf-8 -*-
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−
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−* Web server in Cygwin.
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−
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−  $ setup -p apache2,lighttpd,dhttp
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−
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−* Encoding HTTP data.
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−
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−Starting with HTTP/1.1, web clients can indicate support for compression:
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−
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−  Accept-Encoding: gzip, deflate
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−
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−Web server notifies the web client of this via the Content-Encoding header in the response:
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−
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−  Content-Encoding: gzip
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−
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−* ETags.
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−
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−Server respond:
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−
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−  HTTP/1.1 200 OK
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−  Last-Modified: Tue, 12 Dec 2006 03:03:59 GMT
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−  ETag: "10c24bc-4ab-457e1c1f"
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−  Content-Length: 12195
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−
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−Lately client send:
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−
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−  GET /i/yahoo.gif HTTP/1.1
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−  Host: us.yimg.com
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−  If-Modified-Since: Tue, 12 Dec 2006 03:03:59 GMT
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−  If-None-Match: "10c24bc-4ab-457e1c1f"
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−
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−and get respond:
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−
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−  HTTP/1.1 304 Not Modified
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−