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https://issues.apache.org/jira/browse/HTTPCLIENT-1119?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13770705#comment-13770705
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Bruno Harbulot commented on HTTPCLIENT-1119:
--------------------------------------------
@Oleg:
Indeed, in principle, it could work using the host from {{InetAddress}}, but it
doesn't. I guess it's there to capture the intent.
{{InetAddress.getHostName()}} does retain the host name, but it also does a
reverse lookup if it came from an IP address, which may not have been the
intent.
Try the two snippets of code above and look at the {{Client Hello}} message
with Wireshark, you'll see only the first one has the {{server_name}} extension.
If you look at the [{{SSLSocketImpl}} source
code|http://grepcode.com/file/repository.grepcode.com/java/root/jdk/openjdk/7-b147/sun/security/ssl/SSLSocketImpl.java],
only the methods that have {{String host}} parameters set the internal
{{host}} name used for SNI.
(Similarly, for {{SSLEngine}}, you need to create it with
{{SSLContext.createSSLEngine(String peerHost, int peerPort)}} instead of
{{SSLContext.createSSLEngine()}}: the host name and port are just used as an
indication and are not necessarily linked to what's actually used for the
connection by the channels.)
> Server Name Indication (SNI) Support
> ------------------------------------
>
> Key: HTTPCLIENT-1119
> URL: https://issues.apache.org/jira/browse/HTTPCLIENT-1119
> Project: HttpComponents HttpClient
> Issue Type: Improvement
> Components: HttpClient
> Reporter: Gus Power
> Labels: sni, ssl, tls, vhost
> Fix For: Future
>
> Attachments:
> HTTPCLIENT-1119-support-SNI-on-Java-7-via-setHost-of.patch
>
>
> Provide support for Server Name Indication (SNI) support as per RFC 3546
> (section 3.1).
> Currently attempting to connect to SNI enabled host 'expectedhost' over SSL
> using http client results in an SSLException similar to:
> javax.net.ssl.SSLException: hostname in certificate didn't match:
> <expectedhost> != <defaulthost>
> at
> org.apache.http.conn.ssl.AbstractVerifier.verify(AbstractVerifier.java:220)
> We use SNI on some of our environments and were trying to use httpclient to
> automatically test host access and availability.
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