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From Jeff Trawick <trawi...@bellsouth.net>
Subject Re: Piplined requests in HTTP/1.1
Date Wed, 21 Mar 2001 22:05:47 GMT
"Bill Stoddard" <bill@wstoddard.com> writes:

> Are pipelined requests really used?   The requirement that responses be sent
> back in the order the request was received -really- sucks wind.

In one of the problems Greg and I were debugging, there were pipelined
requests.  Here are the four buffers we read from the network before
we bit the big one.  In a couple of cases it is clear that we received
request n+1 from the client before responding to request n.

# network buffers received for core.39
#
"GET /resources/right.gif HTTP/1.1\r\nUser-Agent: Mozilla/4.0 (compatible; MSIE 5.0; Windows
98) Opera 5.01  [en]\r\nHost: xml.apache.org\r\nAccept: text/html, image/png, image/jpeg,
image/gif, image/x-xbitmap, */*\r\nAccept-Language: en\r\nAccept-Encoding: deflate, gzip,
x-gzip, identity, *;q=0\r\nReferer: http://xml.apache.org/\r\nConnection: Keep-Alive, TE\r\nTE:
deflate, gzip, chunked, identity, trailers\r\n\r\n"
#--------------------------------
"GET /resources/button-asf-lo.gif HTTP/1.1\r\nUser-Agent: Mozilla/4.0 (compatible; MSIE 5.0;
Windows 98) Opera 5.01  [en]\r\nHost: xml.apache.org\r\nAccept: text/html, image/png, image/jpeg,
image/gif, image/x-xbitmap, */*\r\nAccept-Language: en\r\nAccept-Encoding: deflate, gzip,
x-gzip, identity, *;q=0\r\nReferer: http://xml.apache.org/\r\nConnection: Keep-Alive, TE\r\nTE:
deflate, gzip, chunked, identity, trailers\r\n\r\nGET /graphics/news-label-3.jpg HTTP/1.1\r\nUser-Agent:
Mozilla/4.0 (compatible; MSIE 5.0; Windows 98) Opera 5.01  [en]\r\nHost: xml.ap"
#--------------------------------
"ache.org\r\nAccept: text/html, image/png, image/jpeg, image/gif, image/x-xbitmap, */*\r\nAccept-Language:
en\r\nAccept-Encoding: deflate, gzip, x-gzip, identity, *;q=0\r\nReferer: http://xml.apache.org/\r\nConnection:
Keep-Alive, TE\r\nTE: deflate, gzip, chunked, identity, trailers\r\n\r\nGET /graphics/ext-22-label-3.jpg
HTTP/1.1\r\nUser-Agent: Mozilla/4.0 (compatible; MSIE 5.0; Windows 98) Opera 5.01  [en]\r\nHost:
xml.apache.org\r\nAccept: text/html, image/png, image/jpeg, image/gif, image/x-xbitmap, */*\r\nAccept-Language:
en\r\nAccept-Encoding: deflate"
#----------------------------------
", gzip, x-gzip, identity, *;q=0\r\nReferer: http://xml.apache.org/\r\nConnection: Keep-Alive,
TE\r\nTE: deflate, gzip, chunked, identity, trailers\r\n\r\nGET /graphics/ext-30-label-3.jpg
HTTP/1.1\r\nUser-Agent: Mozilla/4.0 (compatible; MSIE 5.0; Windows 98) Opera 5.01  [en]\r\nHost:
xml.apache.org\r\nAccept: text/html, image/png, image/jpeg, image/gif, image/x-xbitmap, */*\r\nAccept-Language:
en\r\nAccept-Encoding: deflate, gzip, x-gzip, identity, *;q=0\r\nReferer: http://xml.apache.org/\r\nConnection:
Keep-Alive, TE\r\nTE: deflate, gzip, chunked, identity"

-- 
Jeff Trawick | trawickj@bellsouth.net | PGP public key at web site:
       http://www.geocities.com/SiliconValley/Park/9289/
             Born in Roswell... married an alien...

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