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WordPress "Expect" header fix
<?php
/**
* By default, cURL sends the "Expect" header all the time which severely impacts
* performance. Instead, we'll send it if the body is larger than 1 mb like
* Guzzle does.
*/
function add_expect_header(array $arguments)
{
$arguments['headers']['expect'] = !empty($arguments['body']) && strlen($arguments['body']) > 1048576 ? '100-Continue' : '';
return $arguments;
}
add_filter('http_request_args', 'add_expect_header');
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