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From "Carl D'Halluin (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HTTPCLIENT-1376) HttpClient incorrectly reuses HTTP/1.1 connection - the response body of the first request is considered as the response for the second request
Date Wed, 19 Jun 2013 16:23:20 GMT
Carl D'Halluin created HTTPCLIENT-1376:
------------------------------------------

             Summary: HttpClient incorrectly reuses HTTP/1.1 connection - the response body
of the first request is considered as the response for the second request
                 Key: HTTPCLIENT-1376
                 URL: https://issues.apache.org/jira/browse/HTTPCLIENT-1376
             Project: HttpComponents HttpClient
          Issue Type: Bug
    Affects Versions: 4.2.4
            Reporter: Carl D'Halluin


In the following scenario, the HttpClient incorrectly reuses the HTTP/1.1 stream, and actually
considers the response body of the first request, to be the HTTP response to a second request.

Details:

1. Client does a simple HTTP/1.1 GET request
2. Server responds with a 401 and a WWW-Authenticate header
3. Client repeats the GET request but now with an Authorization header
4. Server responds with a HTTP/1.1 200 OK but there is no content length. The server sends
a response body
5. HttpClient ignores the response body by closing the entity content InputStream (or call
EntityUtils.consume)
6. Client sends a new HTTP/1.1 GET request (totally unrelated to the previous one)
7. Client erroneously considers the response body received in step 5 as the response to step
6

Step 2 marks the HTTP connection as reusable. Step 4 should explicitly mark the connection
as non-reusable since the only thing the client can do to such an ugly reponse (no content-length)
is read until EOF. However, that does not happen in step 4. Hence in step 5 the code sees
that the connection is reusable, and doesnt bother consuming the response content at all.
The body is reused in step 7

Here we see 4 times 2 subsequent request
- first 2 are no authentication no streaming: HttpClient correctly does not reuse connection
(see port number)
- next 2 are no authentication with streaming: HttpClient correctly does not reuse connection
- next 2 are with authentication with streaming: HttpClient correctly does not reuse connection
- final 2 are with authentication no streaming: Bug - HttpClient tries to reuse connection
given error. Closing the HttpResponse InputStream does not correctly close the underlying
Socket

{code}
REQUEST: GET http://127.0.0.1:8777/non-authenticated.html
RESPONSE STATUS: HTTP/1.1 200 OK - client is 127.0.0.1:49603
RESPONSE BODY - SKIPPED

REQUEST: GET http://127.0.0.1:8777/non-authenticated.html
RESPONSE STATUS: HTTP/1.1 200 OK - client is 127.0.0.1:49604
RESPONSE BODY - SKIPPED

=======================

REQUEST: GET http://127.0.0.1:8777/non-authenticated.html
RESPONSE STATUS: HTTP/1.1 200 OK - client is 127.0.0.1:49605
RESPONSE BODY:   HTTP/1.1 400 This is a request body - client is 127.0.0.1:49605
RESPONSE BODY:   

REQUEST: GET http://127.0.0.1:8777/non-authenticated.html
RESPONSE STATUS: HTTP/1.1 200 OK - client is 127.0.0.1:49606
RESPONSE BODY:   HTTP/1.1 400 This is a request body - client is 127.0.0.1:49606
RESPONSE BODY:   

=======================

REQUEST: GET http://127.0.0.1:8777/authenticated.html
RESPONSE STATUS: HTTP/1.1 200 OK - client is 127.0.0.1:49607
RESPONSE BODY:   HTTP/1.1 400 This is a request body - client is 127.0.0.1:49607
RESPONSE BODY:   

REQUEST: GET http://127.0.0.1:8777/authenticated.html
RESPONSE STATUS: HTTP/1.1 200 OK - client is 127.0.0.1:49608
RESPONSE BODY:   HTTP/1.1 400 This is a request body - client is 127.0.0.1:49608
RESPONSE BODY:   

=======================

REQUEST: GET http://127.0.0.1:8777/authenticated.html
RESPONSE STATUS: HTTP/1.1 200 OK - client is 127.0.0.1:49609
RESPONSE BODY - SKIPPED

REQUEST: GET http://127.0.0.1:8777/authenticated.html
RESPONSE STATUS: HTTP/1.1 400 This is a request body - client is 127.0.0.1:49609
--> BUG! Response status 400
RESPONSE BODY - SKIPPED
{code}



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