I am new to OAuth, and want to create a page that gets the user's contact list from Google using the OAuth system so they don't have to login.
How do I do this? I am using php, so I would really appreciate if there is example code that does this. I can't seem to find it on Google.
Please help!
Thanks
You need to start with Google Contacts Data API and OAuth, when you're done, this should be enough for a reference.
For general OAuth principles to access Google, you might find Google's OAuth playground very useful (contacts are included there).
this is a very basic example (using the php oauth pecl extension and simplexml, it just prints out the names of the 25 first contacts):
<?php
$cons_key="your consumer key";
$cons_sec="your consumer secret";
$callback="http://".$_SERVER[HTTP_HOST].$_SERVER[PHP_SELF];
$req_token_url="https://www.google.com/accounts/OAuthGetRequestToken";
$auth_token_url="https://www.google.com/accounts/OAuthAuthorizeToken";
$acc_token_url="https://www.google.com/accounts/OAuthGetAccessToken";
$scope="https://www.google.com/m8/feeds/";
$scopes=urlencode($scope);
$req_scope_token_url=$req_token_url."?scope=".$scopes;
$endpoint="https://www.google.com/m8/feeds/contacts/default/full/";
session_start();
if(!isset($_GET['oauth_token']) && $_SESSION['state']==1) $_SESSION['state'] = 0;
try {
$oauth = new OAuth($cons_key,$cons_sec);
if(!isset($_GET['oauth_token']) && !$_SESSION['state']) {
$oauth = new OAuth($cons_key,$cons_sec);
$oauth->setRequestEngine(OAUTH_REQENGINE_CURL);
$request_token_info = $oauth->getRequestToken($req_scope_token_url,$callback);
if(!empty($request_token_info)) {
$_SESSION[token]=$request_token_info[oauth_token];
$_SESSION[secret]=$request_token_info[oauth_token_secret];
$_SESSION[state]=1;
header('Location: '.$auth_token_url.'?oauth_token='.$_SESSION[token]);
exit;
}
} else if($_SESSION['state']==1) {
$oauth->setToken($_GET['oauth_token'],$_SESSION['secret']);
$access_token_info = $oauth->getAccessToken($acc_token_url);
$_SESSION['state'] = 2;
$_SESSION['token'] = $access_token_info['oauth_token'];
$_SESSION['secret'] = $access_token_info['oauth_token_secret'];
}
$oauth->fetch($endpoint);
parseAtom($oauth->getLastResponse());
} catch(OAuthException $E) {
print_r($E);
}
function parseAtom($atomstring) {
global $oauth;
$atom=simplexml_load_string($atomstring);
foreach ($atom->entry as $entry) {
print $entry->title.", ";
}
}
?>
you can see the above code in action here.
installing (configuring) the oauth pecl extension can be tricky, you may have to check your php.ini and/or specify a requestengine.
OK. first of all futtta i had some problems with pecl and pear stuff. so i decided to stick with ZEND. I do appreciate you posting though, your code still helped me :-)....
here is what i've got so far, taking some of the code from the ibm page posted above, but altering it to use oauth to get in.
<?php
session_start();
require_once 'common.php';
require_once 'Zend/Oauth/Consumer.php';
require_once 'Zend/Crypt/Rsa/Key/Private.php';
require_once 'Zend/Gdata.php';
require_once 'Zend/Gdata/Query.php';
$oauthOptions = array(
'requestScheme' => Zend_Oauth::REQUEST_SCHEME_HEADER,
'version' => '1.0',
'consumerKey' => 'PUT KEY HERE',
'consumerSecret' => 'PUT KEY HERE',
'signatureMethod' => 'HMAC-SHA1',
'requestTokenUrl' => 'https://www.google.com/accounts/OAuthGetRequestToken',
'userAuthorizationUrl' => 'https://www.google.com/accounts/OAuthAuthorizeToken',
'accessTokenUrl' => 'https://www.google.com/accounts/OAuthGetAccessToken'
);
?>
<!DOCTYPE html
PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<title>Listing contacts</title>
<style>
body {
font-family: Verdana;
}
div.name {
color: red;
text-decoration: none;
font-weight: bolder;
}
div.entry {
display: inline;
float: left;
width: 400px;
height: 150px;
border: 2px solid;
margin: 10px;
padding: 5px;
}
td {
vertical-align: top;
}
</style>
</head>
<body>
<?
$consumer = new Zend_Oauth_Consumer($oauthOptions);
if (!isset($_SESSION['ACCESS_TOKEN_GOOGLE'])) {
if (!empty($_GET)) {
$token = $consumer->getAccessToken($_GET, unserialize($_SESSION['REQUEST_TOKEN_GOOGLE']));
$_SESSION['ACCESS_TOKEN_GOOGLE'] = serialize($token);
} else {
$token = $consumer->getRequestToken(array('scope'=>'http://www.google.com/m8/feeds'));
$_SESSION['REQUEST_TOKEN_GOOGLE'] = serialize($token);
$consumer->redirect();
exit;
}
} else {
$token = unserialize($_SESSION['ACCESS_TOKEN_GOOGLE']);
//$_SESSION['ACCESS_TOKEN_GOOGLE'] = null;
}
$http = $token->getHttpClient($oauthOptions);
$gdata = new Zend_Gdata($http);
$gdata->setMajorProtocolVersion(3);
$gdata->getHttpClient()->setRequestScheme(Zend_Oauth::REQUEST_SCHEME_QUERYSTRING);
$query = new Zend_Gdata_Query('http://www.google.com/m8/feeds/contacts/default/full?);
//$query->setMaxResults(10);
$feed = $gdata->getFeed($query);
?>
<h2><?php echo $feed->title; ?></h2>
<div>
<?php echo $feed->totalResults; ?> contact(s) found.
</div>
<?php
// parse feed and extract contact information
// into simpler objects
$results = array();
foreach($feed as $entry){
$xml = simplexml_load_string($entry->getXML());
$obj = new stdClass;
$obj->name = (string) $entry->title;
$obj->orgName = (string) $xml->organization->orgName;
$obj->orgTitle = (string) $xml->organization->orgTitle;
foreach ($xml->email as $e) {
$obj->emailAddress[] = (string) $e['address'];
}
foreach ($xml->phoneNumber as $p) {
$obj->phoneNumber[] = (string) $p;
}
foreach ($xml->website as $w) {
$obj->website[] = (string) $w['href'];
}
$results[] = $obj;
}
?>
<?php
// display results
foreach ($results as $r) {
?>
<div class="entry">
<div class="name"><?php echo (!empty($r->name)) ?
$r->name : 'Name not available'; ?></div>
<div class="data">
<table>
<tr>
<td>Organization</td>
<td><?php echo $r->orgName; ?></td>
</tr>
<tr>
<td>Email</td>
<td><?php echo @join(', ', $r->emailAddress); ?></td>
</tr>
<tr>
<td>Phone</td>
<td><?php echo @join(', ', $r->phoneNumber); ?></td>
</tr>
<tr>
<td>Web</td>
<td><?php echo @join(', ', $r->website); ?></td>
</tr>
</table>
</div>
</div>
<?php
}
?>
</body>
</html>
There are still some problems, for me it only posts 25 results and i cannot seem to get setmaxresults to work... there seems to be problems with ZEND for that... if someone knows a work around, please post.
b
Hi futta,
Can you show me where you got the OAuth class from?
Thanks.