There's an example of how to tunnel with 4.1, somewhat hidden away at
http://hc.apache.org/httpcomponents-client-ga/httpclient/examples/org/apache/http/examples/conn/ManagerConnectProxy.java.
At lines 106-107 a CONNECT-request is build and a header is added to it.
HttpRequest connect = new BasicHttpRequest("CONNECT", authority,
HttpVersion.HTTP_1_1);
connect.addHeader("Host", authority);
I believe this allows you to add your own headers to the connect method.
Note that 4.x is quite different from 3.x; the set of ...Method-classes no
longer exist, and has been replaced by HttpGet, HttpPost, ... The 3.x
ConnectMethod has no counterpart in 4.x - but you can easily build it
yourself as the example shows.
On Sun, Jun 19, 2011 at 9:27 AM, Wangbo126 <[email protected]> wrote:
>
> Thank you, Bart. I am using httpclient 3.0. I ran debugger to trace into
> HttpMethodDirector class. The proxy tunnel is created in executeConnect()
> method. At the beginning of the method (line 475 in
> HttpMethodDirector.java), an instance of ConnectMethod class is created to
> build the tunnel. The headers of get method to the target host are not
> copied to the instance of ConnectMethod. So during the creationg of the
> tunnel, the proxy cannot see the request headers. After the tunnel is set
> up, the headers of get method to the target host is sent to the proxy as
> general data.
>
> The header I need to pass to the proxy is used to create the tunnel. From
> the source code, it seems 3.0 does not have such a capability. There are
> lots of changes in 4.0. Do you know httpclient4.x has this capability to
> pass a header to proxy to create the tunnel?
>
> Thanks,
> Bo
>
>
> Bart Robeyns wrote:
> >
> > The proxy also sees all request-headers, in the same manner the target
> > host
> > would; there's no "proxy-specific header"-type in HTTP.
> > Simply add your specific header it in the same way you would add a normal
> > request header, and the proxy will pick it up.
> >
> >
> > On Sat, Jun 18, 2011 at 7:49 AM, Wangbo126 <[email protected]>
> wrote:
> >
> >>
> >> Hello,
> >>
> >> I am trying to use httpclient 3.x or 4.x to communicate to a target host
> >> through a proxy. The proxy requires a specific header to establish the
> >> tunnel. How could I pass the required header to the proxy through
> >> httpclient? I know we can set headers to post/get method to the target
> >> host.
> >> But I am not sure we can set headers for proxy. I went through the
> >> internet
> >> and cannot find any document on this.
> >>
> >> Thank you very much for any suggestion.
> >> Bo
> >>
> >>
> >>
> >> --
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> >>
> >>
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> >
> >
>
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