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https://issues.apache.org/jira/browse/HTTPCLIENT-2362?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17927288#comment-17927288
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Oleg Kalnichevski commented on HTTPCLIENT-2362:
-----------------------------------------------
[~pavlov112]
# The latest revision of the HTTP/1.1 specification mandates endpoints to
always signal the highest protocol version with the same major version they are
capable of supporting. HttpClient supports HTTP/1.1 and therefore always
signals that in the request line of request messages it generates.
# HttpClient always tries to respect the protocol version set at the request
level as a hint. When executing requests with HTTP/1.0 hint HttpClient will use
HTTP/1.0 compatible semantic only though the protocol version in the request
line will still be signaled as HTTP/1.1
# One can still force HttpClient into a HTTP/1.0 only mode by doing this
{code:java}
HttpClientBuilder.create()
.setConnectionManager(PoolingHttpClientConnectionManagerBuilder.create()
.setConnectionFactory(ManagedHttpClientConnectionFactory.builder()
.http1Config(Http1Config.custom()
.setVersion(HttpVersion.HTTP_1_0)
.build())
.build())
.build());
{code}
Oleg
> Regression: Versions after 5.3.1 silently ignore attempts to perform HTTP/1.0
> requests
> --------------------------------------------------------------------------------------
>
> Key: HTTPCLIENT-2362
> URL: https://issues.apache.org/jira/browse/HTTPCLIENT-2362
> Project: HttpComponents HttpClient
> Issue Type: Bug
> Affects Versions: 5.4-alpha1, 5.4-alpha2, 5.4, 5.4.1, 5.4.2
> Reporter: Matthew E. Dawson
> Priority: Major
>
> Every attempt I've made to use the classic API to invoke an HTTP/1.0 request
> is silently converted into HTTP/1.1:
> {code:java}
> final var request = new HttpGet(uri);
> request.setVersion(HttpVersion.HTTP_1_0);
> client.execute(host, request, responseHandler);
> {code}
> There's no error on the client side, but everything that I see on the server
> side shows HTTP/1.1, whether I use the classic or async interfaces. I've
> drilled down into the source and I think that it's because
> DefaultHttpRequestWriter entirely ignores the request's version in favor of
> that returned by its internal config object (which always points back at
> HttpVersion.HTTP_1_1), which would more properly make this a core defect
> rather than client, but I have no idea if the problem is confined to the core
> library.
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