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Posted to bugs@httpd.apache.org by bu...@apache.org on 2003/03/19 20:17:03 UTC
DO NOT REPLY [Bug 18157] New: -
Proxy Buffering Disrupts Staged Response Delivery
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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=18157
Proxy Buffering Disrupts Staged Response Delivery
Summary: Proxy Buffering Disrupts Staged Response Delivery
Product: Apache httpd-1.3
Version: 1.3.27
Platform: All
OS/Version: Other
Status: NEW
Severity: Minor
Priority: Other
Component: mod_proxy
AssignedTo: bugs@httpd.apache.org
ReportedBy: gavin@eleventeenth.com
Using mod_proxy as a reverse proxy we discovered that buffering was collecting
staged "update" messages for a long lived process and delivering several at
once. This disrupted the response as it was staged to give updates to the
browser to keep the connection alive, preventing a "Document contains no data"
type error.
The problem was tracked to the fact that mod_proxy's ProxyIOBufferSize ignores
values less than 8192 bytes, also ap_bwrite in buff.c will buffer responses when
using mod_proxy.
I have a patch to allow less than 8192 in ProxyIOBufferSize and to allow the
presence of a "X-Buffer-Output" header set to "no" to unset the B_WR flag in the
response to the browser. I will attach this patch as an update to this bug.
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