friendica/include/probe.php

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<?php
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use Friendica\Network\Probe;
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/**
*
* Probe a network address to discover what kind of protocols we need to communicate with it.
*
* Warning: this function is a bit touchy and there are some subtle dependencies within the logic flow.
* Edit with care.
*
*/
/**
*
* PROBE_DIASPORA has a bias towards returning Diaspora information
* while PROBE_NORMAL has a bias towards dfrn/zot - in the case where
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* an address (such as a Friendica address) supports more than one type
* of network.
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*
*/
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define('PROBE_NORMAL', 0);
define('PROBE_DIASPORA', 1);
function probe_url($url, $mode = PROBE_NORMAL, $level = 1) {
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if ($mode == PROBE_DIASPORA)
$network = NETWORK_DIASPORA;
else
$network = "";
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$data = Probe::uri($url, $network);
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return $data;
}