How to get local address after successful http connection

[micky-10]

Dear all,

 

After a successful http connection, I want to get the local address with the target connection.

But I don’t know how to get it. Any suggestion?

 

I know there is HttpRoute will be determined when a HttpClient.execute(), and HttpRoute.getLocalAddress() may be useful.

But there is no way to get it (HttpRoute) through the public interface according to my experience and my survey of the API javadoc.

 

Because I have two network cards and their subnets are different.

One is 192.168.10.x, another is 192.168.20.x

 

I want to automatically know if I connect to 192.168.30.x, which network card IP will be used?

I think I may get the local address after a successful connection. Am I right?

 

I use HttpClient 4.0.

 

Thanks in advance.

 

 

Sincerely,

Micky

[olegk]

On Thu, 2009-09-17 at 14:38 +0800, Micky wrote:

> Dear all,
>
>  
>
> After a successful http connection, I want to get the local address with the target connection.
>
> But I don’t know how to get it. Any suggestion?
>
>  
>
> I know there is HttpRoute will be determined when a HttpClient.execute(), and HttpRoute.getLocalAddress() may be useful.
>
> But there is no way to get it (HttpRoute) through the public interface according to my experience and my survey of the API javadoc.
>
>  
>
> Because I have two network cards and their subnets are different.
>
> One is 192.168.10.x, another is 192.168.20.x
>
>  
>
> I want to automatically know if I connect to 192.168.30.x, which network card IP will be used?
>
> I think I may get the local address after a successful connection. Am I right?
>
>  
>
> I use HttpClient 4.0.
>
>  
>
> Thanks in advance.
>

The best way to get access to the underlying HTTP connection is by using
a protocol interceptor. Request interceptors will get called after the
connection has been established but before the request gets executed.
Response interceptors will get called immediately after a response head
has bas been received. Choose whichever plugin point is more appropriate
for your application. Here's an example of getting HTTP connection
socket details using a request inerceptor:

------
DefaultHttpClient httpclient = new DefaultHttpClient();

httpclient.addRequestInterceptor(new HttpRequestInterceptor() {

    public void process(
            final HttpRequest request,
            final HttpContext context) throws HttpException, IOException
{
       
        HttpInetConnection conn = (HttpInetConnection) context
  .getAttribute(ExecutionContext.HTTP_CONNECTION);
        System.out.println("local address: " + conn.getLocalAddress());
        System.out.println("local port: " + conn.getLocalPort());
       
    }
   
});

HttpHost target = new HttpHost("localhost", 8080, "http");
HttpGet req = new HttpGet("/");

System.out.println("executing request to " + target);

HttpResponse rsp = httpclient.execute(target, req);
HttpEntity entity = rsp.getEntity();

System.out.println("----------------------------------------");
System.out.println(rsp.getStatusLine());
System.out.println("----------------------------------------");

if (entity != null) {
    entity.consumeContent();
}
------    

For details see:

http://hc.apache.org/httpcomponents-client/tutorial/html/

Hope this helps

Oleg
>  
>
>
>
> Sincerely,
>
> Micky
>


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[micky-10]

Dear Oleg,

It works.

Thank you very much!!

Sincerely,
Micky

-----Original Message-----
From: Oleg Kalnichevski [mailto:olegk@...]
Sent: Saturday, September 19, 2009 12:43 AM
To: HttpClient User Discussion
Subject: Re: How to get local address after successful http connection

On Thu, 2009-09-17 at 14:38 +0800, Micky wrote:

> Dear all,
>
>  
>
> After a successful http connection, I want to get the local address with the target connection.
>
> But I don’t know how to get it. Any suggestion?
>
>  
>
> I know there is HttpRoute will be determined when a HttpClient.execute(), and HttpRoute.getLocalAddress() may be useful.
>
> But there is no way to get it (HttpRoute) through the public interface according to my experience and my survey of the API javadoc.
>
>  
>
> Because I have two network cards and their subnets are different.
>
> One is 192.168.10.x, another is 192.168.20.x
>
>  
>
> I want to automatically know if I connect to 192.168.30.x, which network card IP will be used?
>
> I think I may get the local address after a successful connection. Am I right?
>
>  
>
> I use HttpClient 4.0.
>
>  
>
> Thanks in advance.
>

The best way to get access to the underlying HTTP connection is by using
a protocol interceptor. Request interceptors will get called after the
connection has been established but before the request gets executed.
Response interceptors will get called immediately after a response head
has bas been received. Choose whichever plugin point is more appropriate
for your application. Here's an example of getting HTTP connection
socket details using a request inerceptor:

------
DefaultHttpClient httpclient = new DefaultHttpClient();

httpclient.addRequestInterceptor(new HttpRequestInterceptor() {

    public void process(
            final HttpRequest request,
            final HttpContext context) throws HttpException, IOException
{
       
        HttpInetConnection conn = (HttpInetConnection) context
  .getAttribute(ExecutionContext.HTTP_CONNECTION);
        System.out.println("local address: " + conn.getLocalAddress());
        System.out.println("local port: " + conn.getLocalPort());
       
    }
   
});

HttpHost target = new HttpHost("localhost", 8080, "http");
HttpGet req = new HttpGet("/");

System.out.println("executing request to " + target);

HttpResponse rsp = httpclient.execute(target, req);
HttpEntity entity = rsp.getEntity();

System.out.println("----------------------------------------");
System.out.println(rsp.getStatusLine());
System.out.println("----------------------------------------");

if (entity != null) {
    entity.consumeContent();
}
------    

For details see:

http://hc.apache.org/httpcomponents-client/tutorial/html/

Hope this helps

Oleg
>  
>
>
>
> Sincerely,
>
> Micky
>


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