[wp-trac] [WordPress Trac] #24598: Allow custom headers in XML-RPC request

[WordPress Trac]

#24598: Allow custom headers in XML-RPC request
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 Reporter:  ericmann     |      Owner:
     Type:  enhancement  |     Status:  new
 Priority:  normal       |  Milestone:  Awaiting Review
Component:  XML-RPC      |    Version:  3.5.1
 Severity:  normal       |   Keywords:  has-patch
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 WordPress avails an override to the default `IXR_Client` object that uses
 its own `WP_Http` wrapper for making the request.  The wrapper itself is
 pluggable, but there are no filters before the call to `wp_remote_post`
 that allow developers to intercept and modify the request.

 As a result, sending custom headers with the request (like cookies)
 requires developers in turn override `IXR_Client` with their own
 implementation in order to add the custom data.  One example, which
 specifically addresses sending cookies with the request, is
 https://gist.github.com/ericmann/5808805.

 Instead, the built-in `WP_HTTP_IXR_Client` object should pass its header
 array through a WordPress filter before building the remote request.
 Developers can hook in to this filter to add their own custom headers - be
 they cookies, authentication, language, or whatever.

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Ticket URL: <http://core.trac.wordpress.org/ticket/24598>
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