/**
* Fetch an URL's content. Follows redirects up until the defined
* constant REDIRECT_LIMIT times.
*
* @param peer.http.HttpConnection connection
* @param array params default array()
* @param array headers default array()
* @return string
* @throws peer.http.UnexpectedResponseException
*/
public static function get($connection, $params = array(), $headers = array())
{
$redirected = 0;
do {
try {
$response = $connection->get($params, $headers);
} catch (Throwable $e) {
throw new UnexpectedResponseException($e->getMessage(), -1);
}
// Check return code
switch ($sc = $response->getStatusCode()) {
case 200:
// 200 OK - fetch data
$content = '';
while (FALSE !== ($buf = $response->readData())) {
$content .= $buf;
}
return $content;
case 301:
// 301 Moved permanently or
// 301 Moved permanently or
case 302:
// 302 Moved temporarily - redirect
if (!($loc = $response->getHeader('Location'))) {
throw new UnexpectedResponseException('Redirect status ' . $sc . ', but no location header in ' . $response->toString(), $sc);
}
if ($redirected >= REDIRECT_LIMIT) {
throw new UnexpectedResponseException('Redirection limit (' . REDIRECT_LIMIT . ') reached @ ' . $loc, $sc);
}
$redirected++;
$connection->request = HttpRequestFactory::factory(new URL($loc));
break;
default:
// Any other code
throw new UnexpectedResponseException('Unexpected answer ' . $response->toString(), $sc);
}
} while ($redirected < REDIRECT_LIMIT + 1);
}
