我正在尝试使用Google Calendar API来获取我拥有的公共日历的最新事件列表。这样我的客户就可以编辑日历，信息将显示在网站上。这是我到目前为止的代码（我从Google的一个例子中编辑过）：
<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 = '<MY-CLIENT-ID>';
var SCOPES = ["https://www.googleapis.com/auth/calendar.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';
loadCalendarApi();
} else {
// Show auth UI, allowing the user to initiate authorization by
// clicking authorize button.
authorizeDiv.style.display = 'inline';
}
}
/**
* Load Google Calendar client library. List upcoming events
* once client library is loaded.
*/
function loadCalendarApi() {
gapi.client.load('calendar', 'v3', listUpcomingEvents);
}
/**
* Print the summary and start datetime/date of the next ten events in
* the authorized user's calendar. If no events are found an
* appropriate message is printed.
*/
function listUpcomingEvents() {
var request = gapi.client.calendar.events.list({
'calendarId': '<MY-PUB-CAL-ID>',
'timeMin': (new Date()).toISOString(),
'showDeleted': false,
'singleEvents': true,
'maxResults': 10,
'orderBy': 'startTime'
});
request.execute(function(resp) {
var events = resp.items;
appendPre('Upcoming events:');
if (events.length > 0) {
for (i = 0; i < events.length; i++) {
var event = events[i];
var when = event.start.dateTime;
if (!when) {
when = event.start.date;
}
appendPre(event.summary + ' (' + when + ')')
}
} else {
appendPre('No upcoming events 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=loadCalendarApi">
</script>
</head>
<body>
<div id="authorize-div" style="display: none">
<span>Authorize access to Google Calendar 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>
所以这几乎可以工作，但是当我提出这个请求时，我得到了这个错误：
{
"error": {
"errors": [
{
"domain": "global",
"reason": "required",
"message": "Login Required",
"locationType": "header",
"location": "Authorization"
}
],
"code": 401,
"message": "Login Required"
}
}
为什么我没有通过身份验证才能以只读方式访问此公共日历？
您的错误意味着请求中的凭据不正确（或缺失）。使用库的http日志记录功能来检查对Google API服务器的请求和响应。每个请求都应具有带有承载令牌的“授权”标头。从这个thread，您需要在标题中传递Authorization: Oauth {access token}。
你可以查看这篇SO帖子：How to list Google Calendar Events without User Authentication
你需要做的是使用Service account。然后，您就可以将服务帐户电子邮件地址作为user添加到您网站的日历中。然后，服务帐户将能够访问此日历，包括事件。
您还可以在开发人员控制台中注册并创建API密钥。然后你可以这样做：
GET https://www.googleapis.com/calendar/v3/calendars/<CALENDAR_EMAIL>/events?key={YOUR_API_KEY}
希望这可以帮助！
我想到了！一旦api客户端加载，我所要做的就是设置ApiKey。
<html>
<head>
<!-- JQuery -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<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 = '';
var API_KEY = ''
var CAL_ID = '[email protected]'
var SCOPES = ["https://www.googleapis.com/auth/calendar.readonly"];
/**
* Load Google Calendar client library. List upcoming events
* once client library is loaded.
*/
function loadCalendarApi() {
gapi.client.setApiKey(API_KEY);
gapi.client.load('calendar', 'v3', listUpcomingEvents);
}
/**
* Print the summary and start datetime/date of the next ten events in
* the authorized user's calendar. If no events are found an
* appropriate message is printed.
*/
function listUpcomingEvents() {
var request = gapi.client.calendar.events.list({
'calendarId': CAL_ID,
'timeMin': (new Date()).toISOString(),
'showDeleted': false,
'singleEvents': true,
'maxResults': 10,
'orderBy': 'startTime'
});
request.execute(function(resp) {
var events = resp.items;
appendPre('Upcoming events:');
if (events.length > 0) {
for (i = 0; i < events.length; i++) {
var event = events[i];
var when = event.start.dateTime;
if (!when) {
when = event.start.date;
}
appendPre(event.summary + ' (' + when + ')')
}
} else {
appendPre('No upcoming events 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=loadCalendarApi">
</script>
</head>
<body>
<div id="authorize-div" style="display: none">
<span>Authorize access to Google Calendar 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>
所以你可以看到，我添加了一个API_KEY变量，在函数loadCalendarApi中我设置了api_key然后让我从日历中拉出事件:)