Logging HTTP Response Headers

[Ra Carter]

Is there any way to read HTTP response headers with Servlets? HttpServletResponse does not seem to have anything that serves this purpose.

Also I'm using a JBoss server, so if there is no way to do this with the Servlet spec, is there some JBoss specific way of reading this information before it gets served?

[Gaurav Sainii]

Hi,

Is there any way to read HTTP response headers with Servlets?

Yes you can get these values.

HttpServletResponse does not seem to have anything that serves this purpose.

Please see the specification of getHeader(java.lang.String name) method of this class HttpServletResponse.java it provides you with the value of the response header with the given name.

[Ulf Dittmer]

Please see the specification of getHeader(java.lang.String name) method of this class HttpServletResponse

HttpServletResponse has no such method; it's possible to set headers, not get them.

[Gaurav Sainii]

Please refer the API specification.

For method getHeader here is the direct link:-

getHeader(java.lang.String name)

Please correct me if I am missing anything. :-)

[Ulf Dittmer]

That assumes a Servlet 3.0 container, which are not widely used yet.

[vijin das]

getHeader

java.lang.String getHeader(java.lang.String name)
Gets the value of the response header with the given name.
If a response header with the given name exists and contains multiple values, the value that was added first will be returned.

This method considers only response headers set or added via setHeader(java.lang.String, java.lang.String), addHeader(java.lang.String, java.lang.String), setDateHeader(java.lang.String, long), addDateHeader(java.lang.String, long), setIntHeader(java.lang.String, int), or addIntHeader(java.lang.String, int), respectively.

Parameters:
name - the name of the response header whose value to return
Returns:
the value of the response header with the given name, or null if no header with the given name has been set on this response
Since:
Servlet 3.0

[Ra Carter]

Ulf Dittmer wrote:That assumes a Servlet 3.0 container, which are not widely used yet.

Yes, I'm using the 2.5 Java EE API where HttpServletResponse.getHeaders is not yet implemented.

It looks like 3.0 is still a draft specification? I don't think I am ready to adopt it yet.

Is there any other less obvious way to read the response headers?