Mercurial > hg > nginx-quic
annotate docs/html/50x.html @ 6428:545b5e4d83b2
Upstream: avoid closing client connection in edge case.
If proxy_cache is enabled, and proxy_no_cache tests true, it was previously
possible for the client connection to be closed after a 304. The fix is to
recheck r->header_only after the final cacheability is determined, and end the
request if no longer cacheable.
Example configuration:
proxy_cache foo;
proxy_cache_bypass 1;
proxy_no_cache 1;
If a client sends If-None-Match, and the upstream server returns 200 with a
matching ETag, no body should be returned to the client. At the start of
ngx_http_upstream_send_response proxy_no_cache is not yet tested, thus cacheable
is still 1 and downstream_error is set.
However, by the time the downstream_error check is done in process_request,
proxy_no_cache has been tested and cacheable is set to 0. The client connection
is then closed, regardless of keepalive.
author | Justin Li <jli.justinli@gmail.com> |
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date | Tue, 08 Mar 2016 22:31:55 -0500 |
parents | b5ba6f22a0fc |
children | 1cd63ae46243 |
rev | line source |
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4840
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Valentin Bartenev <vbart@nginx.com>
parents:
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1 <!DOCTYPE html> |
657 | 2 <html> |
3 <head> | |
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parents:
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4 <title>Error</title> |
657 | 5 <style> |
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Valentin Bartenev <vbart@nginx.com>
parents:
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6 body { |
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Valentin Bartenev <vbart@nginx.com>
parents:
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7 width: 35em; |
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Valentin Bartenev <vbart@nginx.com>
parents:
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8 margin: 0 auto; |
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Valentin Bartenev <vbart@nginx.com>
parents:
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9 font-family: Tahoma, Verdana, Arial, sans-serif; |
b5ba6f22a0fc
Improved 50x error page.
Valentin Bartenev <vbart@nginx.com>
parents:
663
diff
changeset
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10 } |
657 | 11 </style> |
12 </head> | |
4840
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Improved 50x error page.
Valentin Bartenev <vbart@nginx.com>
parents:
663
diff
changeset
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13 <body> |
b5ba6f22a0fc
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Valentin Bartenev <vbart@nginx.com>
parents:
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14 <h1>An error occurred.</h1> |
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Valentin Bartenev <vbart@nginx.com>
parents:
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15 <p>Sorry, the page you are looking for is currently unavailable.<br/> |
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Valentin Bartenev <vbart@nginx.com>
parents:
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16 Please try again later.</p> |
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Valentin Bartenev <vbart@nginx.com>
parents:
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17 <p>If you are the system administrator of this resource then you should check |
b5ba6f22a0fc
Improved 50x error page.
Valentin Bartenev <vbart@nginx.com>
parents:
663
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18 the <a href="http://nginx.org/r/error_log">error log</a> for details.</p> |
b5ba6f22a0fc
Improved 50x error page.
Valentin Bartenev <vbart@nginx.com>
parents:
663
diff
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19 <p><em>Faithfully yours, nginx.</em></p> |
657 | 20 </body> |
21 </html> |