Disable redirections in HTTP based drivers

adminer/drivers/elastic.inc.php

@@ -18,9 +18,11 @@ if (isset($_GET["elastic"])) {
 				@ini_set('track_errors', 1); // @ - may be disabled
 				$file = @file_get_contents("$this->_url/" . ltrim($path, '/'), false, stream_context_create(array('http' => array(
 					'method' => $method,
-					'content' => $content === null ? $content : json_encode($content),
-					'header' => 'Content-Type: application/json',
-					'ignore_errors' => 1, // available since PHP 5.2.10
+					'content' => $content !== null ? json_encode($content) : null,
+					'header' => $content !== null ? 'Content-Type: application/json' : [],
+					'ignore_errors' => 1,
+					'follow_location' => 0,
+					'max_redirects' => 0,
 				))));
 				if (!$file) {
 					$this->error = error_get_last()['message'];

plugins/drivers/clickhouse.php

@@ -14,7 +14,9 @@ if (isset($_GET["clickhouse"])) {
 				'method' => 'POST',
 				'content' => $this->isQuerySelectLike($query) ? "$query FORMAT JSONCompact" : $query,
 				'header' => 'Content-type: application/x-www-form-urlencoded',
-				'ignore_errors' => 1, // available since PHP 5.2.10
+				'ignore_errors' => 1,
+				'follow_location' => 0,
+				'max_redirects' => 0,
 			))));
 
 			if ($file === false) {

plugins/drivers/simpledb.php

@@ -425,7 +425,9 @@ if (isset($_GET["simpledb"])) {
 		$file = @file_get_contents((preg_match('~^https?://~', $host) ? $host : "http://$host"), false, stream_context_create(array('http' => array(
 			'method' => 'POST', // may not fit in URL with GET
 			'content' => $query,
-			'ignore_errors' => 1, // available since PHP 5.2.10
+			'ignore_errors' => 1,
+			'follow_location' => 0,
+			'max_redirects' => 0,
 		))));
 		if (!$file) {
 			$connection->error = $php_errormsg;