带JS AJAX调用的GMail API

时间:2015-11-25 20:39:36

标签: javascript jquery ajax email gmail-api

我们使用共同的学生信息系统来管理我们的学校。它很容易在客户端定制,有些地方我们想在某些动作发生时触发电子邮件(表单提交,页面加载等)。不可能使用PHP,ASP或Java等服务器端编程语言。

我们想要做的是使用AJAX调用来发送电子邮件。我完全使用JavaScript工作,但我必须使用我要发送的GMail帐户表单登录。我们需要对此进行一次身份验证(或者只要持有者令牌有效),然后在用户操作发生后发送电子邮件。

由于客户端语言似乎能够在没有发送帐户在浏览器会话中“登录”的情况下点击这些端点并发送电子邮件,这似乎对我来说。是吗?

我也意识到创建一个使用GMail作为SMTP中继的服务器端脚本是一种选择,但许多使用Google Apps for Education的学校根本没有可以托管此类脚本的网站服务器。客户端插件确实是我们想要构建的。

1 个答案:

答案 0 :(得分:0)

您可以尝试此操作,只需替换 CLIENT_ID 值:

此范围是只读,但我可以根据您需要执行的操作进行更改。

<html>
  <head>
    <script type="text/javascript">
      // Your Client ID can be retrieved from your project in the Google
      // Developer Console, https://console.developers.google.com
      var CLIENT_ID = '<YOUR_CLIENT_ID>';

  var SCOPES = ['https://www.googleapis.com/auth/gmail.readonly'];

  /**
   * Check if current user has authorized this application.
   */
  function checkAuth() {
    gapi.auth.authorize(
      {
        'client_id': CLIENT_ID,
        'scope': SCOPES.join(' '),
        'immediate': true
      }, handleAuthResult);
  }

  /**
   * Handle response from authorization server.
   *
   * @param {Object} authResult Authorization result.
   */
  function handleAuthResult(authResult) {
    var authorizeDiv = document.getElementById('authorize-div');
    if (authResult && !authResult.error) {
      // Hide auth UI, then load client library.
      authorizeDiv.style.display = 'none';
      loadGmailApi();
    } else {
      // Show auth UI, allowing the user to initiate authorization by
      // clicking authorize button.
      authorizeDiv.style.display = 'inline';
    }
  }

  /**
   * Initiate auth flow in response to user clicking authorize button.
   *
   * @param {Event} event Button click event.
   */
  function handleAuthClick(event) {
    gapi.auth.authorize(
      {client_id: CLIENT_ID, scope: SCOPES, immediate: false},
      handleAuthResult);
    return false;
  }

  /**
   * Load Gmail API client library. List labels once client library
   * is loaded.
   */
  function loadGmailApi() {
    gapi.client.load('gmail', 'v1', listLabels);
  }

  /**
   * Print all Labels in the authorized user's inbox. If no labels
   * are found an appropriate message is printed.
   */
  function listLabels() {
    var request = gapi.client.gmail.users.labels.list({
      'userId': 'me'
    });

    request.execute(function(resp) {
      var labels = resp.labels;
      appendPre('Labels:');

      if (labels && labels.length > 0) {
        for (i = 0; i < labels.length; i++) {
          var label = labels[i];
          appendPre(label.name)
        }
      } else {
        appendPre('No Labels found.');
      }
    });
  }

  /**
   * Append a pre element to the body containing the given message
   * as its text node.
   *
   * @param {string} message Text to be placed in pre element.
   */
  function appendPre(message) {
    var pre = document.getElementById('output');
    var textContent = document.createTextNode(message + '\n');
    pre.appendChild(textContent);
  }

</script>


  <script src="https://apis.google.com/js/client.js?onload=checkAuth">
    </script>
  </head>
  <body>
    <div id="authorize-div" style="display: none">
      <span>Authorize access to Gmail API</span>
      <!--Button for the user to click to initiate auth sequence -->
      <button id="authorize-button" onclick="handleAuthClick(event)">
        Authorize
      </button>
    </div>
    <pre id="output"></pre>
  </body>
</html>

来源:Gmail API - Quickstart