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From "Oleg Kalnichevski (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (HTTPCLIENT-1068) Ordering HttpClient Headers does not seem possible
Date Mon, 07 Mar 2011 10:39:59 GMT

     [ https://issues.apache.org/jira/browse/HTTPCLIENT-1068?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Oleg Kalnichevski resolved HTTPCLIENT-1068.

    Resolution: Not A Problem


Please note that the HTTP spec does not require any particular ordering of HTTP message headers.

HttpCore maintains HTTP headers in their natural order. So, if you want HTTP headers arranged
in any particular order you should make sure they are added to the message in that very order.
Please note that some headers such as User-Agent can also be added to the outgoing message
automatically by a protocol interceptor. Auto-generated headers usually appear after those
added manually. You can impose a particular order for auto-generated headers by moving your
protocol logic to a custom protocol interceptor. Protocol interceptors can be introduced to
the protocol processing chain in a specific order, when desired

Hope this helps


> Ordering HttpClient Headers does not seem possible
> --------------------------------------------------
>                 Key: HTTPCLIENT-1068
>                 URL: https://issues.apache.org/jira/browse/HTTPCLIENT-1068
>             Project: HttpComponents HttpClient
>          Issue Type: Wish
>          Components: HttpClient
>    Affects Versions: 4.1 Final
>         Environment: Windows 7, Java 1.6.0_21
>            Reporter: Ted Troccola
>            Priority: Minor
>              Labels: httpclient
> It seems impossible to have the HttpClient headers sent "before" the HttpRequest headers.
> When inspecting the headers of the actual connection, these headers will appear BEFORE
the HttpClient
> headers.
> For example, note the order the header values are set in the following code:
> // Set the User-Agent value for the HttpClient 
> myHttpParams.setParameter(CoreProtocolPNames.USER_AGENT, "Mozilla/4.0 (compatible; MSIE
6.0; Windows NT 5.1; .NET CLR 1.1.4322");
> // Set the Accept-Language value for the request 
> request.addHeader(HttpHeaders.ACCEPT_LANGUAGE, "en-us,en;q=0.5");
> // Upon execution, the request will send the headers in the following order
> Accept-Language: en-us,en;q=0.5 
> User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; .NET CLR 1.1.4322)

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