現在位置救う(PHP)

geolocation関数を使用して位置を求め、もし関連の権限とサポートしていないブラウザである場合、ネイバーが提供するAPIを介してアイピーでの位置を求める。

使用前に下記のアドレスにネイバーのAPIキーを受ける。
(https://www.ncloud.com/product/applicationService/geoLocation)

<? 
	function makeSignature($secretKey, $method, $baseString, $timestamp, $accessKey)
	{
		$space = ' ';
		$newLine = "\n";
		$hmac = $method.$space.$baseString.$newLine.$timestamp.$newLine.$accessKey;
		$signautue = base64_encode(hash_hmac('sha256', $hmac, $secretKey,true));
		return $signautue;
	}

	if($_POST['order'] == 'geolocation')
	{
		$hostNameUrl = 'https://geolocation.apigw.ntruss.com';
		$requestUrl= '/geolocation/v2/geoLocation';
		$accessKey = 'accessKey를 입력해주세요.';
		$secretKey = 'secretKey를 입력해주세요.';

		$ip = $_SERVER['REMOTE_ADDR'];
		$timestamp = round(microtime(true) * 1000);

		$baseString = $requestUrl.'?ip='.$ip.'&amp;ext=t&amp;responseFormatType=json';

		$signautue = makeSignature($secretKey, 'GET', $baseString, $timestamp, $accessKey);
		$url = $hostNameUrl.$baseString;

		$is_post = false;
		$ch = curl_init();
		curl_setopt($ch, CURLOPT_URL, $url);
		curl_setopt($ch, CURLOPT_POST, $is_post);
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
		$headers = array();
		$headers[] = 'X-NCP-APIGW-TIMESTAMP: '.$timestamp;
		$headers[] = 'X-NCP-IAM-ACCESS-KEY: '.$accessKey;
		$headers[] = 'X-NCP-APIGW-SIGNATURE-V2: '.$signautue;

		curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
		$response = json_decode(curl_exec ($ch), true);

		if($response['geoLocation'])
		{
			$lat = $response['geoLocation']['lat'];
			$lng = $response['geoLocation']['long'];
		}else{
			$lat = 37.535053;
			$lng = 127.147263;
		}

		echo json_encode(array('latitude'=>$lat, 'longitude'=>$lng));
		exit;
	}

?>
<html lang="ko">
<head>
	<meta charset="UTF-8">
	<title>位置 계산중...</title>
</head>
<body>
<div style="width: 100%; text-align: center; display: inline-block; ">
	<p>원활한 이용을 위해 사용자의 位置를 계산 중입니다.</p>
	<p>位置 확인 권한을 <font color="RED"><strong>허용</strong></font>해주시길 바랍니다.</p>
</div>

<script>
	function setPositionByGeo(pos)
	{
		document.cookie = "latitude=" + pos.coords.latitude;
		document.cookie = "longitude=" + pos.coords.longitude;

		location.href = "<?=$_GET['url'] ? $_GET['url'] : '/'?>";
	}

	function setPositionByIP()
	{
		var xhr = new XMLHttpRequest();
		var dat = new FormData();

		dat.append("order", "geolocation");

		xhr.open("POST", window.location.pathname);
		xhr.send(dat);

		xhr.onload = function()
		{
			if(xhr.status === 200 || xhr.status === 201)
			{
				var res = JSON.parse(xhr.responseText);

				if(res.latitude&amp;&amp;res.longitude)
				{
					document.cookie = "latitude=" + res.latitude;
					document.cookie = "longitude=" + res.longitude;


					location.href = "<?=$_GET['url'] ? $_GET['url'] : '/'?>";
				}
			}
		};
	}

	window.onload = function() {
		if (navigator.geolocation)
			navigator.geolocation.getCurrentPosition(setPositionByGeo, setPositionByIP);
		else
			setPositionByIP();
	}
</script>
</body>
</html>
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