mirror of
https://git.friendi.ca/friendica/friendica-addons.git
synced 2024-12-23 18:20:16 +00:00
671 lines
20 KiB
PHP
671 lines
20 KiB
PHP
<?php
|
|
/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
|
|
/**
|
|
* PHP support for the Libravatar.org service.
|
|
*
|
|
* PHP version 5
|
|
*
|
|
* The MIT License
|
|
*
|
|
* Copyright (c) 2011 Services_Libravatar committers.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*
|
|
* @category Services
|
|
* @package Services_Libravatar
|
|
* @author Melissa Draper <melissa@meldraweb.com>
|
|
* @copyright 2011 Services_Libravatar committers.
|
|
* @license http://www.opensource.org/licenses/mit-license.html MIT License
|
|
* @link http://pear.php.net/package/Services_Libravatar
|
|
* @since File available since Release 0.1.0
|
|
*/
|
|
|
|
/**
|
|
* PHP support for the Libravatar.org service.
|
|
*
|
|
* Using this class is easy. After including or requiring
|
|
* Services/Libravatar.php simply do:
|
|
* <code>
|
|
* $libravatar = new Services_Libravatar();
|
|
* $url = $libravatar->getUrl('melissa@meldraweb.com');
|
|
* </code>
|
|
*
|
|
* This would populate $url with the string:
|
|
* <code>
|
|
* http://cdn.libravatar.org/avatar/4db84629c121f2d443d33bdb9fd149bc
|
|
* </code>
|
|
*
|
|
* A complicated lookup using all the options is:
|
|
* <code>
|
|
* $libravatar = new Services_Libravatar();
|
|
* $libravatar->setSize(40);
|
|
* $libravatar->setAlgorithm('sha256');
|
|
* $libravatar->setHttps(true);
|
|
* $libravatar->setDefault(
|
|
* 'http://upload.wikimedia.org/wikipedia/commons/a/af/Tux.png'
|
|
* );
|
|
* $url = $libravatar->getUrl('melissa@meldraweb.com');
|
|
* </code>
|
|
*
|
|
* @category Services
|
|
* @package Services_Libravatar
|
|
* @author Melissa Draper <melissa@meldraweb.com>
|
|
* @copyright 2011 Services_Libravatar committers.
|
|
* @license http://www.opensource.org/licenses/mit-license.html MIT License
|
|
* @version Release: 0.2.1
|
|
* @link http://pear.php.net/package/Services_Libravatar
|
|
* @since Class available since Release 0.1.0
|
|
*/
|
|
class Services_Libravatar
|
|
{
|
|
/**
|
|
* Hashing algorithm to use
|
|
*
|
|
* @var string
|
|
* @see processAlgorithm()
|
|
* @see setAlgorithm()
|
|
*/
|
|
protected $algorithm = 'md5';
|
|
|
|
/**
|
|
* Default image URL to use
|
|
*
|
|
* @var string
|
|
* @see processDefault()
|
|
* @see setDefault()
|
|
*/
|
|
protected $default;
|
|
|
|
/**
|
|
* If HTTPS URLs should be used
|
|
*
|
|
* @var boolean
|
|
* @see detectHttps()
|
|
* @see setHttps()
|
|
*/
|
|
protected $https;
|
|
|
|
/**
|
|
* Image size in pixels
|
|
*
|
|
* @var integer
|
|
* @see processSize()
|
|
* @see setSize()
|
|
*/
|
|
protected $size;
|
|
|
|
|
|
/**
|
|
* Composes a URL for the identifier and options passed in
|
|
*
|
|
* Compose a full URL as specified by the Libravatar API, based on the
|
|
* email address or openid URL passed in, and the options specified.
|
|
*
|
|
* @param string $identifier a string of either an email address
|
|
* or an openid url
|
|
* @param array $options an array of (bool) https, (string) algorithm
|
|
* (string) size, (string) default.
|
|
* See the set* methods.
|
|
*
|
|
* @return string A string of a full URL for an avatar image
|
|
*
|
|
* @since Method available since Release 0.2.0
|
|
* @deprecated Use getUrl() instead
|
|
*/
|
|
public function url($identifier, $options = array())
|
|
{
|
|
return $this->getUrl($identifier, $options);
|
|
}
|
|
|
|
/**
|
|
* Composes a URL for the identifier and options passed in
|
|
*
|
|
* Compose a full URL as specified by the Libravatar API, based on the
|
|
* email address or openid URL passed in, and the options specified.
|
|
*
|
|
* @param string $identifier a string of either an email address
|
|
* or an openid url
|
|
* @param array $options an array of (bool) https, (string) algorithm
|
|
* (string) size, (string) default.
|
|
* See the set* methods.
|
|
*
|
|
* @return string A string of a full URL for an avatar image
|
|
*
|
|
* @since Method available since Release 0.2.0
|
|
* @throws InvalidArgumentException When an invalid option is passed
|
|
*/
|
|
public function getUrl($identifier, $options = array())
|
|
{
|
|
// If no identifier has been passed, set it to a null.
|
|
// This way, there'll always be something returned.
|
|
if (!$identifier) {
|
|
$identifier = null;
|
|
} else {
|
|
$identifier = $this->normalizeIdentifier($identifier);
|
|
}
|
|
|
|
// Load all options
|
|
$options = $this->checkOptionsArray($options);
|
|
$https = $this->https;
|
|
if (isset($options['https'])) {
|
|
$https = (bool)$options['https'];
|
|
}
|
|
|
|
$algorithm = $this->algorithm;
|
|
if (isset($options['algorithm'])) {
|
|
$algorithm = $this->processAlgorithm($options['algorithm']);
|
|
}
|
|
|
|
$default = $this->default;
|
|
if (isset($options['default'])) {
|
|
$default = $this->processDefault($options['default']);
|
|
}
|
|
$size = $this->size;
|
|
if (isset($options['size'])) {
|
|
$size = $this->processSize($options['size']);
|
|
}
|
|
|
|
|
|
$identifierHash = $this->identifierHash($identifier, $algorithm);
|
|
|
|
// Get the domain so we can determine the SRV stuff for federation
|
|
$domain = $this->domainGet($identifier);
|
|
|
|
// If https has been specified in $options, make sure we make the
|
|
// correct SRV lookup
|
|
$service = $this->srvGet($domain, $https);
|
|
$protocol = $https ? 'https' : 'http';
|
|
|
|
$params = array();
|
|
if ($size !== null) {
|
|
$params['size'] = $size;
|
|
}
|
|
if ($default !== null) {
|
|
$params['default'] = $default;
|
|
}
|
|
$paramString = '';
|
|
if (count($params) > 0) {
|
|
$paramString = '?' . http_build_query($params);
|
|
}
|
|
|
|
// Compose the URL from the pieces we generated
|
|
$url = $protocol . '://' . $service . '/avatar/' . $identifierHash
|
|
. $paramString;
|
|
|
|
// Return the URL string
|
|
return $url;
|
|
}
|
|
|
|
/**
|
|
* Checks the options array and verify that only allowed options are in it.
|
|
*
|
|
* @param array $options Array of options for getUrl()
|
|
*
|
|
* @return void
|
|
* @throws Exception When an invalid option is used
|
|
*/
|
|
protected function checkOptionsArray($options)
|
|
{
|
|
//this short options are deprecated!
|
|
if (isset($options['s'])) {
|
|
$options['size'] = $options['s'];
|
|
unset($options['s']);
|
|
}
|
|
if (isset($options['d'])) {
|
|
$options['default'] = $options['d'];
|
|
unset($options['d']);
|
|
}
|
|
|
|
$allowedOptions = array(
|
|
'algorithm' => true,
|
|
'default' => true,
|
|
'https' => true,
|
|
'size' => true,
|
|
);
|
|
foreach ($options as $key => $value) {
|
|
if (!isset($allowedOptions[$key])) {
|
|
throw new InvalidArgumentException(
|
|
'Invalid option in array: ' . $key
|
|
);
|
|
}
|
|
}
|
|
|
|
return $options;
|
|
}
|
|
|
|
/**
|
|
* Normalizes the identifier (E-mail address or OpenID)
|
|
*
|
|
* @param string $identifier E-Mail address or OpenID
|
|
*
|
|
* @return string Normalized identifier
|
|
*/
|
|
protected function normalizeIdentifier($identifier)
|
|
{
|
|
if (filter_var($identifier, FILTER_VALIDATE_EMAIL)) {
|
|
return strtolower($identifier);
|
|
} else {
|
|
return self::normalizeOpenId($identifier);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Create a hash of the identifier.
|
|
*
|
|
* Create a hash of the email address or openid passed in. Algorithm
|
|
* used for email address ONLY can be varied. Either md5 or sha256
|
|
* are supported by the Libravatar API. Will be ignored for openid.
|
|
*
|
|
* @param string $identifier A string of the email address or openid URL
|
|
* @param string $hash A string of the hash algorithm type to make
|
|
* Uses the php implementation of hash()
|
|
* MD5 preferred for Gravatar fallback
|
|
*
|
|
* @return string A string hash of the identifier.
|
|
*
|
|
* @since Method available since Release 0.1.0
|
|
*/
|
|
protected function identifierHash($identifier, $hash = 'md5')
|
|
{
|
|
if (filter_var($identifier, FILTER_VALIDATE_EMAIL) || $identifier === null) {
|
|
// If email, we can select our algorithm. Default to md5 for
|
|
// gravatar fallback.
|
|
return hash($hash, $identifier);
|
|
}
|
|
|
|
//no email, so the identifier has to be an OpenID
|
|
return hash('sha256', $identifier);
|
|
}
|
|
|
|
/**
|
|
* Normalizes an identifier (URI or XRI)
|
|
*
|
|
* @param mixed $identifier URI or XRI to be normalized
|
|
*
|
|
* @return string Normalized Identifier.
|
|
* Empty string when the OpenID is invalid.
|
|
*
|
|
* @internal Adapted from OpenID::normalizeIdentifier()
|
|
*/
|
|
public static function normalizeOpenId($identifier)
|
|
{
|
|
// XRI
|
|
if (preg_match('@^xri://@i', $identifier)) {
|
|
return preg_replace('@^xri://@i', '', $identifier);
|
|
}
|
|
|
|
if (in_array($identifier[0], array('=', '@', '+', '$', '!'))) {
|
|
return $identifier;
|
|
}
|
|
|
|
// URL
|
|
if (!preg_match('@^http[s]?://@i', $identifier)) {
|
|
$identifier = 'http://' . $identifier;
|
|
}
|
|
if (strpos($identifier, '/', 8) === false) {
|
|
$identifier .= '/';
|
|
}
|
|
if (!filter_var($identifier, FILTER_VALIDATE_URL)) {
|
|
return '';
|
|
}
|
|
|
|
$parts = parse_url($identifier);
|
|
$parts['scheme'] = strtolower($parts['scheme']);
|
|
$parts['host'] = strtolower($parts['host']);
|
|
|
|
//http://openid.net/specs/openid-authentication-2_0.html#normalization
|
|
return $parts['scheme'] . '://'
|
|
. (isset($parts['user']) ? $parts['user'] : '')
|
|
. (isset($parts['pass']) ? ':' . $parts['pass'] : '')
|
|
. (isset($parts['user']) || isset($parts['pass']) ? '@' : '')
|
|
. $parts['host']
|
|
. (
|
|
(isset($parts['port'])
|
|
&& $parts['scheme'] === 'http' && $parts['port'] != 80)
|
|
|| (isset($parts['port'])
|
|
&& $parts['scheme'] === 'https' && $parts['port'] != 443)
|
|
? ':' . $parts['port'] : ''
|
|
)
|
|
. $parts['path']
|
|
. (isset($parts['query']) ? '?' . $parts['query'] : '');
|
|
//leave out fragment as requested by the spec
|
|
}
|
|
|
|
/**
|
|
* Grab the domain from the identifier.
|
|
*
|
|
* Extract the domain from the Email or OpenID.
|
|
*
|
|
* @param string $identifier A string of the email address or openid URL
|
|
*
|
|
* @return string A string of the domain to use
|
|
*
|
|
* @since Method available since Release 0.1.0
|
|
*/
|
|
protected function domainGet($identifier)
|
|
{
|
|
if ($identifier === null) {
|
|
return null;
|
|
}
|
|
|
|
// What are we, email or openid? Split ourself up and get the
|
|
// important bit out.
|
|
if (filter_var($identifier, FILTER_VALIDATE_EMAIL)) {
|
|
$email = explode('@', $identifier);
|
|
return $email[1];
|
|
}
|
|
|
|
//OpenID
|
|
$url = parse_url($identifier);
|
|
$domain = $url['host'];
|
|
if (isset($url['port']) && $url['scheme'] === 'http'
|
|
&& $url['port'] != 80
|
|
|| isset($url['port']) && $url['scheme'] === 'https'
|
|
&& $url['port'] != 443
|
|
) {
|
|
$domain .= ':' . $url['port'];
|
|
}
|
|
|
|
return $domain;
|
|
}
|
|
|
|
/**
|
|
* Get the target to use.
|
|
*
|
|
* Get the SRV record, filtered by priority and weight. If our domain
|
|
* has no SRV records, fall back to Libravatar.org
|
|
*
|
|
* @param string $domain A string of the domain we extracted from the
|
|
* provided identifier with domainGet()
|
|
* @param boolean $https Whether or not to look for https records
|
|
*
|
|
* @return string The target URL.
|
|
*
|
|
* @since Method available since Release 0.1.0
|
|
*/
|
|
protected function srvGet($domain, $https = false)
|
|
{
|
|
|
|
// Are we going secure? Set up a fallback too.
|
|
if (isset($https) && $https === true) {
|
|
$subdomain = '_avatars-sec._tcp.';
|
|
$fallback = 'seccdn.';
|
|
} else {
|
|
$subdomain = '_avatars._tcp.';
|
|
$fallback = 'cdn.';
|
|
}
|
|
|
|
// Lets try get us some records based on the choice of subdomain
|
|
// and the domain we had passed in.
|
|
$srv = @dns_get_record($subdomain . $domain, DNS_SRV);
|
|
|
|
// Did we get anything? No?
|
|
if (empty($srv)) {
|
|
// Then let's try Libravatar.org.
|
|
return $fallback . 'libravatar.org';
|
|
}
|
|
|
|
// Sort by the priority. We must get the lowest.
|
|
usort($srv, array($this, 'comparePriority'));
|
|
|
|
$top = $srv[0];
|
|
$sum = 0;
|
|
|
|
// Try to adhere to RFC2782's weighting algorithm, page 3
|
|
// "arrange all SRV RRs (that have not been ordered yet) in any order,
|
|
// except that all those with weight 0 are placed at the beginning of
|
|
// the list."
|
|
shuffle($srv);
|
|
$srvs = array();
|
|
foreach ($srv as $s) {
|
|
if ($s['weight'] == 0) {
|
|
array_unshift($srvs, $s);
|
|
} else {
|
|
array_push($srvs, $s);
|
|
}
|
|
}
|
|
|
|
foreach ($srvs as $s) {
|
|
if ($s['pri'] == $top['pri']) {
|
|
// "Compute the sum of the weights of those RRs"
|
|
$sum += (int) $s['weight'];
|
|
// "and with each RR associate the running sum in the selected
|
|
// order."
|
|
$pri[$sum] = $s;
|
|
}
|
|
}
|
|
|
|
// "Then choose a uniform random number between 0 and the sum computed
|
|
// (inclusive)"
|
|
$random = rand(0, $sum);
|
|
|
|
// "and select the RR whose running sum value is the first in the selected
|
|
// order which is greater than or equal to the random number selected"
|
|
foreach ($pri as $k => $v) {
|
|
if ($k >= $random) {
|
|
return $v['target'];
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Sorting function for record priorities.
|
|
*
|
|
* @param mixed $a A mixed value passed by usort()
|
|
* @param mixed $b A mixed value passed by usort()
|
|
*
|
|
* @return mixed The result of the comparison
|
|
*
|
|
* @since Method available since Release 0.1.0
|
|
*/
|
|
protected function comparePriority($a, $b)
|
|
{
|
|
return $a['pri'] - $b['pri'];
|
|
}
|
|
|
|
/**
|
|
* Automatically set the https option depending on the current connection
|
|
* value.
|
|
*
|
|
* If the current connection is HTTPS, the https options is activated.
|
|
* If it is not HTTPS, the https option is deactivated.
|
|
*
|
|
* @return self
|
|
*/
|
|
public function detectHttps()
|
|
{
|
|
$this->setHttps(
|
|
isset($_SERVER['HTTPS']) && $_SERVER['HTTPS']
|
|
);
|
|
|
|
return $this;
|
|
}
|
|
|
|
/**
|
|
* Verify and cast the email address hashing algorithm to use.
|
|
*
|
|
* @param string $algorithm Algorithm to use, "sha256" or "md5".
|
|
*
|
|
* @return string Algorithm
|
|
*
|
|
* @throws InvalidArgumentException When an unsupported algorithm is given
|
|
*/
|
|
protected function processAlgorithm($algorithm)
|
|
{
|
|
$algorithm = (string)$algorithm;
|
|
if ($algorithm !== 'md5' && $algorithm !== 'sha256') {
|
|
throw new InvalidArgumentException(
|
|
'Only md5 and sha256 hashing supported'
|
|
);
|
|
}
|
|
|
|
return $algorithm;
|
|
}
|
|
|
|
/**
|
|
* Verify and cast the default URL to use when no avatar image can be found.
|
|
* If none is set, the libravatar logo is returned.
|
|
*
|
|
* @param string $url Full URL to use OR one of the following:
|
|
* - "404" - give a "404 File not found" instead of an image
|
|
* - "mm"
|
|
* - "identicon"
|
|
* - "monsterid"
|
|
* - "wavatar"
|
|
* - "retro"
|
|
*
|
|
* @return string Default URL
|
|
*
|
|
* @throws InvalidArgumentException When an invalid URL is given
|
|
*/
|
|
protected function processDefault($url)
|
|
{
|
|
if ($url === null) {
|
|
return $url;
|
|
}
|
|
|
|
$url = (string)$url;
|
|
|
|
switch ($url) {
|
|
case '404':
|
|
case 'mm':
|
|
case 'identicon':
|
|
case 'monsterid':
|
|
case 'wavatar':
|
|
case 'retro':
|
|
case 'robohash':
|
|
case 'pagan':
|
|
break;
|
|
default:
|
|
$valid = filter_var($url, FILTER_VALIDATE_URL);
|
|
if (!$valid) {
|
|
throw new InvalidArgumentException('Invalid default avatar URL');
|
|
}
|
|
break;
|
|
}
|
|
|
|
return $url;
|
|
}
|
|
|
|
/**
|
|
* Verify and cast the required size of the images.
|
|
*
|
|
* @param integer $size Size (width and height in pixels) of the image.
|
|
* NULL for the default width.
|
|
*
|
|
* @return integer Size
|
|
*
|
|
* @throws InvalidArgumentException When a size <= 0 is given
|
|
*/
|
|
protected function processSize($size)
|
|
{
|
|
if ($size === null) {
|
|
return $size;
|
|
}
|
|
|
|
$size = (int)$size;
|
|
if ($size <= 0) {
|
|
throw new InvalidArgumentException('Size has to be larger than 0');
|
|
}
|
|
|
|
return (int)$size;
|
|
}
|
|
|
|
|
|
/**
|
|
* Set the email address hashing algorithm to use.
|
|
* To keep gravatar compatibility, use "md5".
|
|
*
|
|
* @param string $algorithm Algorithm to use, "sha256" or "md5".
|
|
*
|
|
* @return self
|
|
* @throws InvalidArgumentException When an unsupported algorithm is given
|
|
*/
|
|
public function setAlgorithm($algorithm)
|
|
{
|
|
$this->algorithm = $this->processAlgorithm($algorithm);
|
|
|
|
return $this;
|
|
}
|
|
|
|
/**
|
|
* Set the default URL to use when no avatar image can be found.
|
|
* If none is set, the gravatar logo is returned.
|
|
*
|
|
* @param string $url Full URL to use OR one of the following:
|
|
* - "404" - give a "404 File not found" instead of an image
|
|
* - "mm"
|
|
* - "identicon"
|
|
* - "monsterid"
|
|
* - "wavatar"
|
|
* - "retro"
|
|
*
|
|
* @return self
|
|
* @throws InvalidArgumentException When an invalid URL is given
|
|
*/
|
|
public function setDefault($url)
|
|
{
|
|
$this->default = $this->processDefault($url);
|
|
|
|
return $this;
|
|
}
|
|
|
|
/**
|
|
* Set if HTTPS URLs shall be returned.
|
|
*
|
|
* @param boolean $useHttps If HTTPS url shall be returned
|
|
*
|
|
* @return self
|
|
*
|
|
* @see detectHttps()
|
|
*/
|
|
public function setHttps($useHttps)
|
|
{
|
|
$this->https = (bool)$useHttps;
|
|
|
|
return $this;
|
|
}
|
|
|
|
/**
|
|
* Set the required size of the images.
|
|
* Every avatar image is square sized, which means you need to set only number.
|
|
*
|
|
* @param integer $size Size (width and height) of the image
|
|
*
|
|
* @return self
|
|
* @throws InvalidArgumentException When a size <= 0 is given
|
|
*/
|
|
public function setSize($size)
|
|
{
|
|
$this->size = $this->processSize($size);
|
|
|
|
return $this;
|
|
}
|
|
|
|
}
|
|
|
|
/*
|
|
* Local variables:
|
|
* tab-width: 4
|
|
* c-basic-offset: 4
|
|
* c-hanging-comment-ender-p: nil
|
|
* End:
|
|
*/
|
|
|
|
?>
|