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ICAP respmod problem

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Hi, folks.

I am using Squid 3.1.19 as a client-side cache server which is
compiled with --enable-icap-client option.

I have a problem, Squid can not finish HTTP request from browser under
specific conditions: as follow.

  - Squid is configured to forward response body to an ICAP respmod server,
    AND
  - When a Web server answers content length equals 1 byte.


The following is the curl's output.

  $ curl -o /dev/null -v -x 192.168.1.1:8080
http://radiant-water-7466.herokuapp.com/1
  * About to connect() to proxy 192.168.1.1 port 8080
  *   Trying 192.168.1.1... connected
  * Connected to 192.168.1.1 (192.168.1.1) port 8080
  > GET http://radiant-water-7466.herokuapp.com/1 HTTP/1.1
  > User-Agent: curl/7.15.5 (i686-redhat-linux-gnu) libcurl/7.15.5
OpenSSL/0.9.8b zlib/1.2.3 libidn/0.6.5
  > Host: radiant-water-7466.herokuapp.com
  > Proxy-Connection: Keep-Alive
  >
  < HTTP/1.0 200 OK
  < Date: Mon, 21 May 2012 13:24:54 GMT
  < Content-Type: text/html;charset=utf-8
  < Server: thin 1.3.1 codename Triple Espresso
  < Content-Length: 1
  * HTTP/1.0 connection set to keep alive!
  < Connection: keep-alive
    % Total    % Received % Xferd  Average Speed   Time    Time
Time  Current
                                   Dload  Upload   Total   Spent    Left  Speed
    0     1    0     0    0     0      0      0 --:--:--  0:00:20
--:--:--     0
                                                                    ~~~~~
http://radiant-water-7466.herokuapp.com/1 return single char with
Content-Length: 1.
In this case, the connection should be closed by Squid, but Squid was
keeping connection.

no problem if content-lengh is more than 1 or if icap repomod is disabled.


If you test this case, use the following url  which responses
specified content body.
http://radiant-water-7466.herokuapp.com/[number]  => responses
[number] bytes content.


Thanks.

--
Nobuhiro Nikushi
deneb.ge@xxxxxxxxx


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