laravel6でqrコードを生成して、safariからiphoneカメラ経由でURLを読み取って、リダイレクトしてみた。

1, url文字列をQRコードにして表示する

参考URL
https://qiita.com/nobuhiro-kobayashi/items/7d6d74df4ceb344f1647

# コマンドラインからインストール
composer require simplesoftwareio/simple-qrcode

1 2	# コマンドラインからインストール composer require simplesoftwareio/simple-qrcode

config/app.phpに追加

'providers' => [
    ...
    /*
     * Package Service Providers...
     */
     // 追加!!!
    SimpleSoftwareIO\QrCode\QrCodeServiceProvider::class,
],

'aliases' => [
    ...
    // 追加!!!
    'QrCode' => SimpleSoftwareIO\QrCode\Facades\QrCode::class,
],

'providers' => [

...

* Package Service Providers...

// 追加!!!

SimpleSoftwareIO\QrCode\QrCodeServiceProvider::class,

'aliases' => [

...

// 追加!!!

'QrCode' => SimpleSoftwareIO\QrCode\Facades\QrCode::class,

routes/web.phpに記述して、http://localhost/laravel6/public/qr でQRコードが表示された。簡単！

Route::get('qr', function() {
    $url = "https://www.google.co.jp";
    $src = base64_encode(QrCode::format('png')->size(200)->generate($url));
    return response('<img src="data:image/png;base64, ' . $src . '">');
});

Route::get('qr', function() {

$url = "https://www.google.co.jp";

$src = base64_encode(QrCode::format('png')->size(200)->generate($url));

return response('<img src="data:image/png;base64, ' . $src . '">');

});

2, safariブラウザからiphoneカメラを使って、QRコードを読み込んでリダイレクトする。
jsライブラリはjsqr.jsを使う。demoサイト( https://cozmo.github.io/jsQR/ )のHTMLに１行だけ追加して使う。なぜかchrome/firefoxだと動作しない(safariだけ動作した)
window.location.href = code.data; // 読み込んだURLへリダイレクト

<html>
<head>
  <meta charset="utf-8">
  <title>jsQR Demo</title>
  <script src="./jsQR.js"></script>
  <link href="https://fonts.googleapis.com/css?family=Ropa+Sans" rel="stylesheet">
  <style>
    body {
      font-family: 'Ropa Sans', sans-serif;
      color: #333;
      max-width: 640px;
      margin: 0 auto;
      position: relative;
    }

    #githubLink {
      position: absolute;
      right: 0;
      top: 12px;
      color: #2D99FF;
    }

    h1 {
      margin: 10px 0;
      font-size: 40px;
    }

    #loadingMessage {
      text-align: center;
      padding: 40px;
      background-color: #eee;
    }

    #canvas {
      width: 100%;
    }

    #output {
      margin-top: 20px;
      background: #eee;
      padding: 10px;
      padding-bottom: 0;
    }

    #output div {
      padding-bottom: 10px;
      word-wrap: break-word;
    }

    #noQRFound {
      text-align: center;
    }
  </style>
</head>
<body>
  <h1>jsQR Demo</h1>
  <a id="githubLink" href="https://github.com/cozmo/jsQR">View documentation on Github</a>
  <p>Pure JavaScript QR code decoding library.</p>
  <div id="loadingMessage">&#x1f3a5; Unable to access video stream (please make sure you have a webcam enabled)</div>
  <canvas id="canvas" hidden></canvas>
  <div id="output" hidden>
    <div id="outputMessage">No QR code detected.</div>
    <div hidden><b>Data:</b> <span id="outputData"></span></div>
  </div>
  <script>
    var video = document.createElement("video");
    var canvasElement = document.getElementById("canvas");
    var canvas = canvasElement.getContext("2d");
    var loadingMessage = document.getElementById("loadingMessage");
    var outputContainer = document.getElementById("output");
    var outputMessage = document.getElementById("outputMessage");
    var outputData = document.getElementById("outputData");

    function drawLine(begin, end, color) {
      canvas.beginPath();
      canvas.moveTo(begin.x, begin.y);
      canvas.lineTo(end.x, end.y);
      canvas.lineWidth = 4;
      canvas.strokeStyle = color;
      canvas.stroke();
    }

    // Use facingMode: environment to attemt to get the front camera on phones
    navigator.mediaDevices.getUserMedia({ video: { facingMode: "environment" } }).then(function(stream) {
      video.srcObject = stream;
      video.setAttribute("playsinline", true); // required to tell iOS safari we don't want fullscreen
      video.play();
      requestAnimationFrame(tick);
    });

    function tick() {
      loadingMessage.innerText = "&#x231b; Loading video..."
      if (video.readyState === video.HAVE_ENOUGH_DATA) {
        loadingMessage.hidden = true;
        canvasElement.hidden = false;
        outputContainer.hidden = false;

        canvasElement.height = video.videoHeight;
        canvasElement.width = video.videoWidth;
        canvas.drawImage(video, 0, 0, canvasElement.width, canvasElement.height);
        var imageData = canvas.getImageData(0, 0, canvasElement.width, canvasElement.height);
        var code = jsQR(imageData.data, imageData.width, imageData.height, {
          inversionAttempts: "dontInvert",
        });
        if (code) {
          drawLine(code.location.topLeftCorner, code.location.topRightCorner, "#FF3B58");
          drawLine(code.location.topRightCorner, code.location.bottomRightCorner, "#FF3B58");
          drawLine(code.location.bottomRightCorner, code.location.bottomLeftCorner, "#FF3B58");
          drawLine(code.location.bottomLeftCorner, code.location.topLeftCorner, "#FF3B58");
          outputMessage.hidden = true;
          outputData.parentElement.hidden = false;
          outputData.innerText = code.data;

		  // 読み込んだURLへリダイレクト
		  window.location.href = code.data;
        } else {
          outputMessage.hidden = false;
          outputData.parentElement.hidden = true;
        }
      }
      requestAnimationFrame(tick);
    }
  </script>
</body>
</html>

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<html>

<head>

<style>

body {

font-family: 'Ropa Sans', sans-serif;

color: #333;

max-width: 640px;

margin: 0 auto;

position: relative;

}

#githubLink {

position: absolute;

right: 0;

top: 12px;

color: #2D99FF;

}

h1 {

margin: 10px 0;

font-size: 40px;

}

#loadingMessage {

text-align: center;

padding: 40px;

background-color: #eee;

}

#canvas {

width: 100%;

}

#output {

margin-top: 20px;

background: #eee;

padding: 10px;

padding-bottom: 0;

}

#output div {

padding-bottom: 10px;

word-wrap: break-word;

}

#noQRFound {

text-align: center;

}

</style>

</head>

<body>

<a id="githubLink" href="https://github.com/cozmo/jsQR">View documentation on Github</a>

<p>Pure JavaScript QR code decoding library.</p>

<div id="loadingMessage">🎥 Unable to access video stream (please make sure you have a webcam enabled)</div>

<div id="outputMessage">No QR code detected.</div>

</div>

var video = document.createElement("video");

var canvasElement = document.getElementById("canvas");

var canvas = canvasElement.getContext("2d");

var loadingMessage = document.getElementById("loadingMessage");

var outputContainer = document.getElementById("output");

var outputMessage = document.getElementById("outputMessage");

var outputData = document.getElementById("outputData");

function drawLine(begin, end, color) {

canvas.beginPath();

canvas.moveTo(begin.x, begin.y);

canvas.lineTo(end.x, end.y);

canvas.lineWidth = 4;

canvas.strokeStyle = color;

canvas.stroke();

}

// Use facingMode: environment to attemt to get the front camera on phones

navigator.mediaDevices.getUserMedia({ video: { facingMode: "environment" } }).then(function(stream) {

video.srcObject = stream;

video.setAttribute("playsinline", true); // required to tell iOS safari we don't want fullscreen

video.play();

requestAnimationFrame(tick);

});

function tick() {

loadingMessage.innerText = "⌛ Loading video..."

if (video.readyState === video.HAVE_ENOUGH_DATA) {

loadingMessage.hidden = true;

canvasElement.hidden = false;

outputContainer.hidden = false;

canvasElement.height = video.videoHeight;

canvasElement.width = video.videoWidth;

canvas.drawImage(video, 0, 0, canvasElement.width, canvasElement.height);

var imageData = canvas.getImageData(0, 0, canvasElement.width, canvasElement.height);

var code = jsQR(imageData.data, imageData.width, imageData.height, {

inversionAttempts: "dontInvert",

});

if (code) {

drawLine(code.location.topLeftCorner, code.location.topRightCorner, "#FF3B58");

drawLine(code.location.topRightCorner, code.location.bottomRightCorner, "#FF3B58");

drawLine(code.location.bottomRightCorner, code.location.bottomLeftCorner, "#FF3B58");

drawLine(code.location.bottomLeftCorner, code.location.topLeftCorner, "#FF3B58");

outputMessage.hidden = true;

outputData.parentElement.hidden = false;

outputData.innerText = code.data;

// 読み込んだURLへリダイレクト

window.location.href = code.data;

} else {

outputMessage.hidden = false;

outputData.parentElement.hidden = true;

}

requestAnimationFrame(tick);

}

</script>

</body>

</html>

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