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API取得PHPプログラム

Posted at

api/index.html

index.html
<!DOCTYPE html>
<html lang="ja">
<head>
  <meta charset="UTF-8">
  <title>WebAPI test</title>
</head>
<body>
  <h2>WebAPI</h2>
  <h3>リクエスト</h3>
  <!-- ユーザタイプを入力するテキストボックス -->
  User Type:<input type="text" name="dataType" /><br>
  <!-- 入力する値の項目 -->
  <ul>
    <li>a:Admin</li>
    <li>o:Operator</li>
    <li>g:Guest</li>
    <li>e:Empty</li>
  </ul>
  <!-- ajax()を実行するボタン -->
  <button data-btn-type="ajax">Data get!</button>
  <br><br>
  <h3>結果</h3>
  <!-- 結果表示用のdivタグ -->
  <div data-result="">未取得</div>
  <script src="../lib/jquery.js"></script>
  <script type="text/javascript" src="api.js"></script>
  <!-- <script type="text/javascript" src="api2.js"></script> -->
</body>
</html>


api/api/users.php
users.php

<?php
function returnJson($resultArray){
  if(array_key_exists('callback', $_GET)){
    $json = $_GET['callback'] . "(" . json_encode($resultArray) . ");";
  }else{
    $json = json_encode($resultArray);
  }
  header('Content-Type: text/html; charset=utf-8');
  echo  $json;
  exit(0);
}


//---------------------------------------------------------
//  処理の開始
//---------------------------------------------------------
//  値の取得(リクエストの受付)
$type = $_REQUEST["user_type"];

//  ユーザリストの初期化
$user_list = [];
//  返却値の初期化
$result = [];

try {
  //  値の検証
  if (empty($type)) {
    throw new Exception("no type...");
  }

  //  ユーザリストの作成
  switch ($type) {
    case 'a':
    case 'admin':
      $user_list = [
        ['name'=>'中居','age'=>18]
      ];
      break;
    case 'o':
    case 'operator':
      $user_list = [
        ['name'=>'木村','age'=>17],
        ['name'=>'森','age'=>16]
      ];
      break;
    case 'g':
    case 'guest':
      $user_list = [
        ['name'=>'香取','age'=>14],
        ['name'=>'草薙','age'=>15],
        ['name'=>'稲垣','age'=>15],
        ['name'=>'岡田','age'=>15],
        ['name'=>'森田','age'=>15],
        ['name'=>'三宅','age'=>15],
        ['name'=>'長野','age'=>15],
        ['name'=>'坂本','age'=>15],
        ['name'=>'井ノ原','age'=>15]
      ];
      break;
    default:
      //  不正な値
      throw new Exception("Invalid value...");
      break;
  }

  //  返却値の作成
  $result = [
    'result' => 'OK',
    'users' => $user_list
  ];
} catch (Exception $e) {
  $result = [
    'result' => 'NG',
    'message' => $e->__toString()
  ];
}

//  JSONでレスポンスを返す
returnJson($result);
?>


api/api.js
api.js

$(function() {
  //  クリックイベントにajax処理を登録する
  $('body').on('click', 'button[data-btn-type=ajax]', function(e) {
    console.log('click btn');
    //  リクエストの下準備
    //  リクエスト時に一緒に送るデータの作成
    var send_data;
    send_data = {
      //  テキストボックスの値を設定
      user_type : $('input').val()
    };
    console.log(send_data);
    //  WebAPIを叩く
    $.ajax({
      //  リクエストの内容
      type: "POST",
      url: 'api/users.php',
      dataType: "json",
      data: send_data,
      //  レスポンス成功時の処理
      success: function(responce) {
        if (responce.result === "OK") {
          console.log("成功1");
          console.log(responce);
          $('div[data-result=""]').html(JSON.stringify(responce));
        } else {
          console.log("成功2");
          console.log(responce);
          $('div[data-result=""]').html(JSON.stringify(responce));
        }
        return false;
      },
      //  レスポンス失敗時の処理
      error: function(XMLHttpRequest, textStatus, errorThrown) {
        console.log("エラー");
        console.log(XMLHttpRequest);
        console.log(textStatus);
        console.log(errorThrown);
        $('div[data-result=""]').html(JSON.stringify("データ取得中にエラーが発生しました。"));
        return false;
      }
    });
    //  フォーカスをテキストボックスに合わせる
    $('input').focus();

    return false;
  });
});


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