此页面检查会话中是否有访问令牌，如果没有，则重定向用户进行身份验证.如果有，它会显示选择器和一个表单.在picker Javascript代码中，注意使用的oAuthToken是用PHP从服务器获取的！来源:使用 Google Picker 无需登录 Google帐户(使用 OAuth).然后表单向此页面提交 POST 请求并下载文件.
getDownloadUrl();如果($downloadUrl){$request = new Google_Http_Request($downloadUrl, 'GET', null, null);$httpRequest = $service->getClient()->getAuth()->authenticatedRequest($request);如果 ($httpRequest->getResponseHttpCode() == 200) {返回 $httpRequest->getResponseBody();} 别的 {//发生错误.返回空；}} 别的 {//该文件没有存储在 Drive 上的任何内容.返回空；}}$client = new Google_Client();$client->setAuthConfigFile('client_secrets.json');$client->addScope(Google_Service_Drive::DRIVE_READONLY);如果 (isset($_SESSION['access_token']) && $_SESSION['access_token']) {$client->setAccessToken($_SESSION['access_token']);if (isset($_POST['fileid'])){$drive_service = new Google_Service_Drive($client);$file = $drive_service->files->get($_POST['fileid']);$data = downloadFile($drive_service, $file);file_put_contents('temp.jpg', $data);echo "文件上传";出口();}} 别的 {$redirect_uri = 'http://localhost/drivepicker-php/oauth2callback.php';header('位置:' .filter_var($redirect_uri, FILTER_SANITIZE_URL));出口();}?><!DOCTYPE html><html xmlns="http://www.w3.org/1999/xhtml"><头><meta http-equiv="content-type" content="text/html; charset=utf-8"/><title>Google 选择器示例</title><script type="text/javascript">//从 Google Developers Console 获取的浏览器 API 密钥.var developerKey = '';//替换为您自己的应用 ID.(它是您客户 ID 中的第一个数字)var appId = ""var pickerApiLoaded = false;//使用 Google API Loader 脚本加载 google.picker 脚本.函数 loadPicker() {gapi.load('picker', {'callback': onPickerApiLoad});}函数 onPickerApiLoad() {pickerApiLoaded = true;创建选择器()；}//创建并渲染一个 Picker 对象函数 createPicker() {如果(pickerApiLoaded){var view = new google.picker.DocsView();view.setIncludeFolders(true);//view.setMimeTypes("image/png,image/jpeg,image/jpg");var picker = new google.picker.PickerBuilder()//.enableFeature(google.picker.Feature.NAV_HIDDEN)//.enableFeature(google.picker.Feature.MULTISELECT_ENABLED).setAppId(appId).setOAuthToken('<?= json_decode($client->getAccessToken())->access_token;?>').addView(视图).setDeveloperKey(developerKey).setCallback(pickerCallback).建造();选择器.setVisible(真)；}}//一个简单的回调实现.功能选择器回调(数据){if (data.action == google.picker.Action.PICKED) {var fileId = data.docs[0].id;document.getElementById("fileid").value = fileId;}}<身体><form action="quickstart.php" method="post"><label for="fileid">文件ID</label><input type="text" name="fileid" id="fileid"><输入类型=提交"></表单><!-- Google API 加载程序脚本.--><script type="text/javascript" src="https://apis.google.com/js/api.js?onload=loadPicker"></script><script type="text/javascript" src="https://apis.google.com/js/client.js"></script></html>
I have a mobile site m.example.com - from a phone I want visitors to choose a file from Google Drive, and send it to the server that hosts m.example.com. Essentially emulating a simple <input type="file"> file upload as on a desktop.
From what I understand the workflow is as follows:
1) User picks file with Picker which sends meta data of the chosen file to my website client (i.e. the HTML/Javascript running on the phone/tablet)
2) I send that to my server via ajax or just a form hidden field
3) my server makes a request to the Google API to get the file and then stores it in the server's file system
So I need help on:
a) is the above steps correct, and is there any other way to do this, or even a service I can use that will allow my site users to pick their files from one of several cloud storage providors?
a) assuming my steps are correct and this is the only way, I am stuck on the 3) part - server talking to the API.
So far I've ceated the picker as per here - Google picker auth popup is being blocked and got the file URL. I've not done 2) yet, I'm just manually putting the file URL into my downlaod script for now.
I'm using PHP and the file I'll want to downlaod to my server could be public or private, that depends on the end user.
I followed the links from the API docs and installed the client from here : https://github.com/google/google-api-php-client, but when trying "Step 3: Set up the sample" on the Drive docs I get many errors such as files not found, class not fount etc, so that makes me think therr is two different APIs/Clients being documented here - can someone please point me in the right direction to get started?
Got Fatal error: require_once(): Failed opening required 'src/Google_Client.php' (include_path='.:/usr/local/lib/php') in /path/to/google-api/drive_rest_api_step_3.php on line 5
There is no Google_Client.php in the library, but there is src/Google/Client.php so I edit the require_once to use that.
Now get Failed opening required 'src/contrib/Google_DriveService.php' - again a search for that file yeilds no results, but there is a src/Google/Service/Drive.php, so edit example to use that:
You are right in that the drive quickstart guide is outdated, it refers to the old version of Google's PHP Client API Library that is on Google Code, rather than the newer one on GitHub. Hence the quickstart guide doesn't work with the PHP Client Library you downloaded. In addition, the quickstart guide code is intended to be executed in PHP command-line mode rather than on the server.
To answer the question, I've put in a few sub-answers:
How to use the PHP Client Library
How to pick a file with the Google Picker and get the file onto the server
Using the Google PHP Client Library with the Google Drive API
Unfortunately, even that is a bit outdated (the include path is outdated and is now deprecated). As such (and for StackOverflow's completeness sake) here's some code. I used a subdirectory drivetest in my web server root; change the URLs as necessary.
Do note that you need to get the client ID for "Web applications" in Google's Developer Console, and download the JSON (replacing the client_secrets.json in the code as necessary).
For your use case, you are probably better off using the Google Picker https://developers.google.com/picker/docs/ which implements the whole browse-and-select-file thing for you, and just gives an ID to the file. A summary of the steps required:
Get access token (authentication)
Use picker to let user pick file
Use file ID returned from picker to get download URL
Download file from download URL
We can do this in two ways (client-side or server-side):
Method 1: Client-side
Using this method, steps 1 - 3 are done in Javascript, and only step 4 is done in PHP. With this method we don't even need the PHP client library!
This file launches the filepicker upon page load and puts the URL into a form.
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8"/>
<title>Google Picker Example</title>
<script type="text/javascript">
// The Browser API key obtained from the Google Developers Console.
var developerKey = '';
// The Client ID obtained from the Google Developers Console. Replace with your own Client ID.
var clientId = ""
// Replace with your own App ID. (Its the first number in your Client ID)
var appId = ""
// Scope to use to access user's Drive items.
var scope = ['https://www.googleapis.com/auth/drive'];
var pickerApiLoaded = false;
var oauthToken;
// Use the Google API Loader script to load the google.picker script.
function loadPicker() {
gapi.load('auth', {'callback': onAuthApiLoad});
gapi.load('picker', {'callback': onPickerApiLoad});
}
function onAuthApiLoad() {
window.gapi.auth.authorize(
{
'client_id': clientId,
'scope': scope,
'immediate': false
},
handleAuthResult);
}
function onPickerApiLoad() {
pickerApiLoaded = true;
createPicker();
}
function handleAuthResult(authResult) {
if (authResult && !authResult.error) {
oauthToken = authResult.access_token;
createPicker();
}
}
// Create and render a Picker object
function createPicker() {
if (pickerApiLoaded && oauthToken) {
var view = new google.picker.DocsView();
view.setIncludeFolders(true);
//view.setMimeTypes("image/png,image/jpeg,image/jpg");
var picker = new google.picker.PickerBuilder()
//.enableFeature(google.picker.Feature.NAV_HIDDEN)
//.enableFeature(google.picker.Feature.MULTISELECT_ENABLED)
.setAppId(appId)
.setOAuthToken(oauthToken)
.addView(view)
.setDeveloperKey(developerKey)
.setCallback(pickerCallback)
.build();
picker.setVisible(true);
}
}
// A simple callback implementation.
function pickerCallback(data) {
if (data.action == google.picker.Action.PICKED) {
var fileId = data.docs[0].id;
gapi.client.load('drive', 'v2', function() {
var request = gapi.client.drive.files.get({
fileId: fileId
});
request.execute(processFile);
});
}
}
function processFile(file) {
var token = gapi.auth.getToken();
// console.log(file);
// console.log(token);
document.getElementById("fileurl").value = file.downloadUrl+"&access_token="+token.access_token;
}
</script>
</head>
<body>
<form action="submit.php" method="post">
<label for="fileurl">File Download URL</label><input type="text" name="fileurl" id="fileurl">
<input type="submit">
</form>
<!-- The Google API Loader script. -->
<script type="text/javascript" src="https://apis.google.com/js/api.js?onload=loadPicker"></script>
<script type="text/javascript" src="https://apis.google.com/js/client.js"></script>
</body>
</html>
We then submit the form to a PHP script to download the file on the server. The trick here is that we also need to pass the access token from the client to the server, since the user is not authenticated on the server side. Surprisingly, you can simply append the access_token parameter to authenticate the download of the file, as shown above.
submit.php
Use file_get_contents or CURL, depending on what your server supports. HTTPS support is required for this to work though.
Using this method, steps 1, 3 and 4 are done in PHP, and only step 2 is done in Javascript.
quickstart.php
This page checks if there is an access token in the session, if there is not it redirects the user for authentication. If there is, it shows the picker and a form. In the picker Javascript code, note that the oAuthToken used is obtained with PHP from the server! Source: Use Google Picker without logging in with Google account (with OAuth). The form then submits a POST request to this page and the file is downloaded.
<?php
require_once 'google-api-php-client/src/Google/autoload.php';
session_start();
// Ref: https://developers.google.com/drive/v2/reference/files/get
function downloadFile($service, $file) {
$downloadUrl = $file->getDownloadUrl();
if ($downloadUrl) {
$request = new Google_Http_Request($downloadUrl, 'GET', null, null);
$httpRequest = $service->getClient()->getAuth()->authenticatedRequest($request);
if ($httpRequest->getResponseHttpCode() == 200) {
return $httpRequest->getResponseBody();
} else {
// An error occurred.
return null;
}
} else {
// The file doesn't have any content stored on Drive.
return null;
}
}
$client = new Google_Client();
$client->setAuthConfigFile('client_secrets.json');
$client->addScope(Google_Service_Drive::DRIVE_READONLY);
if (isset($_SESSION['access_token']) && $_SESSION['access_token']) {
$client->setAccessToken($_SESSION['access_token']);
if (isset($_POST['fileid'])){
$drive_service = new Google_Service_Drive($client);
$file = $drive_service->files->get($_POST['fileid']);
$data = downloadFile($drive_service, $file);
file_put_contents('temp.jpg', $data);
echo "file uploaded";
exit();
}
} else {
$redirect_uri = 'http://localhost/drivepicker-php/oauth2callback.php';
header('Location: ' . filter_var($redirect_uri, FILTER_SANITIZE_URL));
exit();
}
?>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8"/>
<title>Google Picker Example</title>
<script type="text/javascript">
// The Browser API key obtained from the Google Developers Console.
var developerKey = '';
// Replace with your own App ID. (Its the first number in your Client ID)
var appId = ""
var pickerApiLoaded = false;
// Use the Google API Loader script to load the google.picker script.
function loadPicker() {
gapi.load('picker', {'callback': onPickerApiLoad});
}
function onPickerApiLoad() {
pickerApiLoaded = true;
createPicker();
}
// Create and render a Picker object
function createPicker() {
if (pickerApiLoaded) {
var view = new google.picker.DocsView();
view.setIncludeFolders(true);
//view.setMimeTypes("image/png,image/jpeg,image/jpg");
var picker = new google.picker.PickerBuilder()
//.enableFeature(google.picker.Feature.NAV_HIDDEN)
//.enableFeature(google.picker.Feature.MULTISELECT_ENABLED)
.setAppId(appId)
.setOAuthToken('<?= json_decode($client->getAccessToken())->access_token; ?>')
.addView(view)
.setDeveloperKey(developerKey)
.setCallback(pickerCallback)
.build();
picker.setVisible(true);
}
}
// A simple callback implementation.
function pickerCallback(data) {
if (data.action == google.picker.Action.PICKED) {
var fileId = data.docs[0].id;
document.getElementById("fileid").value = fileId;
}
}
</script>
</head>
<body>
<form action="quickstart.php" method="post">
<label for="fileid">File ID</label><input type="text" name="fileid" id="fileid">
<input type="submit">
</form>
<!-- The Google API Loader script. -->
<script type="text/javascript" src="https://apis.google.com/js/api.js?onload=loadPicker"></script>
<script type="text/javascript" src="https://apis.google.com/js/client.js"></script>
</body>
</html>
