0WordPress的本地缓存的gravatar

我喜欢的人头像显示在我的博客评论谁. WordPress的支持的gravatar服务本身因此启用,这是很容易. 然而,它是有代价 - 从另一个域访问外部文件中增加了许多额外的加载时间的新形式 DNS 查找, 新 SSL 连接使, 等等. Would­n’t it be nice to have gravatars stored loc­ally and served from your own serv­er. 嗯,这就是我一直在做了一段时间, 如果你想知道如何, 阅读...

In case you’re still won­der­ing just why you’d want to do this, let me offer a few more bene­fits — images served loc­ally can be com­pressed before serving them, for example ‑all my images are con­ver­ted into webp ver­sions, and any browser which sup­ports webp gets the webp ver­sion. This is in addi­tion to the reduc­tion from not hav­ing to con­nect to an extern­al serv­er. The loc­al resources can also have a cach­ing head­er set on them so that browsers will cache them. Gravatar does­n’t provide for a very long cache time.

I have cre­ated 3 cus­tom func­tions, 我只是把我的主题的functions.php文件. The first is a cus­tom fil­ter for the nat­ive word­press get_avatar(). 从的gravatar和谷歌的第二争夺化身呼吁时, and the third cre­ates a daily cronjob which refreshes the gravatars — in case they’ve been changed, or a pre­vi­ously unavail­able one is now avail­able.

You will need to do a little bit of tinker­ing to make it com­pat­ible with your theme — I use the “bones” frame­work as you’ll notice in the 3RD func­tion I’ve reused some code that it provided. You will also need to cre­ate, or cus­tom­ise the path to store the gravatars, which in my case are stored in the theme folder in the sub­path “/library/images/gravatars/”

/*********************************************\
* 过滤get_avatar只使用本地替身 *
\*********************************************/
功能bones_gravatar($头像, $id_or_email, $尺寸, $默认, $ALT)
{
$root_path = get_template_directory_uri() . '/库/图像/ gravatars /';
$root_path_local = get_template_directory() . '/库/图像/ gravatars /';
$gravatar_path = $ root_path . 'default_avatar';
$gravatar_path_hidpi =“数据的gravatar-hidpi ="”。$ root_path . “default_avatar-hidpi.png"“;

//shamelessly reuse original code to get the e-mail address

$email = '';
如果 ( is_numeric($id_or_email) )
{
$ID = (INT) $id_or_email;
$用户= get_userdata($ID);
如果 ( $用户 ) $电子邮件= $用户>USER_EMAIL;
}
ELSEIF ( is_object($id_or_email) )
{
// No avatar for pingbacks or trackbacks
$allowed_comment_types = apply_filters( 'get_avatar_comment_types', 排列( '评论' ) );
如果 ( ! 空( $id_or_email->comment_type ) && ! in_array( $id_or_email->comment_type, (排列) $allowed_comment_types ) ) 返回false;
如果 ( !空($id_or_email->用户名) )
{
$ID = (INT) $id_or_email->用户名;
$用户= get_userdata($ID);
如果 ( $用户) $电子邮件= $用户>USER_EMAIL;
}
ELSEIF ( !空($id_or_email->comment_author_email) )
{
$电子邮件= $ id_or_email->comment_author_email;
}
}
其他
{
$电子邮件= $ id_or_email;
}

如果 ( !空($电子邮件) )
{
$email_hash = MD5( 用strtolower( 修剪( $电子邮件 ) ) );
如果(文件已存在($root_path_local . $email_hash . “巴纽”))
{
//if we have a local cache then use it
$gravatar_path= $root_path . $email_hash ;
$gravatar_path_hidpi =“数据的gravatar-hidpi ="”。$ root_path . $email_hash . “-hidpi.png"“;
}
}
如果($尺寸 >= 47) $头像='<IMG类="负载的gravatar头像头像 - “ $大小。”照片" 宽度="'$大小。'" 高度="'$大小。'" SRC ="“ . $gravatar_path . “-hidpi.png" ALT ="的gravatar" />“;
否则$头像='<IMG类="负载的gravatar头像头像 - “ $大小。”照片" 宽度="'$大小。'" 高度="'$大小。'" SRC ="“ . $gravatar_path . ”巴纽" ALT ="的gravatar" “ . $gravatar_path_hidpi . “/>“;

返回$头像;
}

的add_filter('get_avatar', 'bones_gravatar', 10, 5);






/***********************\
* 创建的gravatar缓存 *
\***********************/
功能grab_avatar($COMMENT_ID,$评论,$刷新= FALSE,$电子邮件=“”)
{
usleep(20);
$root_path = get_template_directory_uri() . '/库/图像/ gravatars /';
$root_path_local = get_template_directory() . '/库/图像/ gravatars /';
如果($刷新==假) $img_name = MD5( get_comment_author_email($COMMENT_ID) );
否则$ img_name = MD5( $电子邮件 );
如果(!文件已存在($root_path_local . $img_name . “巴纽”) || $刷新==真)
{
如果($刷新==假) $bgauthemail = get_comment_author_email();
否则$ bgauthemail = $电子邮件;
//try google first
$domain= explode("@",$bgauthemail);
如果($域[1]=="gmail.com")
{
$CH = curl_init();
curl_setopt($CH, CURLOPT_SSL_VERIFYPEER, 假);
curl_setopt($CH, CURLOPT_RETURNTRANSFER, true);
curl_setopt($CH, CURLOPT_URL, "HTTP://picasaweb.google.com/data/entry/api/user/" . $bgauthemail . "?ALT = JSON");
$结果= curl_exec($CH);
curl_close($CH);

$OBJ = json_decode($结果,true);
$avatar_from_gmail = $ OBJ['条目'][“GPhoto $缩略图”]['$ T'];

$延长= strrchr($avatar_from_gmail, '');

$CH = curl_init($avatar_from_gmail);
curl_setopt( $CH, CURLOPT_NOBODY, true );
curl_setopt( $CH, CURLOPT_RETURNTRANSFER, 假 );
curl_setopt( $CH, CURLOPT_HEADER, 假 );
curl_setopt( $CH, CURLOPT_FOLLOWLOCATION, true );
curl_setopt( $CH, CURLOPT_MAXREDIRS, 3 );
curl_exec( $CH );
$标题= curl_getinfo( $CH );
curl_close( $CH );
如果($头['HTTP_CODE'] === 200)
{
$CH = curl_init($avatar_from_gmail);
$FP =的fopen($root_path_local . $img_name . '-hidpi' . $延期, 'WB');
curl_setopt($CH,CURLOPT_USERAGENT,“的Mozilla / 5.0 (Windows NT的 6.1; Win64平台; x64的) 为AppleWebKit / 537.36 (KHTML, 像壁虎) 镀铬/ 39.0.2171.62的Safari / 537.36');
curl_setopt($CH, CURLOPT_FILE, $FP);
curl_setopt($CH, CURLOPT_HEADER, 0);

curl_exec($CH);
curl_close($CH);

FCLOSE($FP);

$usegravatar = FALSE;

$small_image = wp_get_image_editor($root_path_local . $img_name . '-hidpi' . $延期);
如果 ( ! is_wp_error( $small_image ) )
{
//检查一下是不是空白的男人形象, 如果是这样, delete it
if (md5_file($root_path_local . $img_name . '-hidpi.jpg') ==用strtolower("686E5C46776BA0E5C488853C1C0B492C"))
{
//delete
unlink($root_path_local . $img_name . '-hidpi.jpg');
//try gravatar
$usegravatar=true;
}
否则,如果 (md5_file($root_path_local . $img_name . '-hidpi.jpg') ==用strtolower("6D4083BE95FB32358A5110F5A83B9979"))
{
//delete
unlink($root_path_local . $img_name . '-hidpi.jpg');
//try gravatar
$usegravatar=true;
}
其他
{
//always convert to png because some plugins expect all gravatars to be pngs
$small_image->保存($root_path_local . $img_name . '-hidpi.png','图像/ PNG');
$small_image->调整(40, 40, true);
$small_image->set_quality( 10 );
$small_image->保存($root_path_local . $img_name . “巴纽”,'图像/ PNG');
如果($扩展==".JPG") 取消链接($root_path_local . $img_name . '-hidpi.jpg');
}
}
}

}
//check e-mail isnt a blank generic one
else if($bgauthemail!=="noemail@intensedebate.com" || $usegravatar ==真)
{
$avatar_from_gravatar = "HTTPS://www.gravatar.com/avatar/" . $img_name . "?S = 80&d = 404";
$CH = curl_init($avatar_from_gravatar);
curl_setopt( $CH, CURLOPT_NOBODY, true );
curl_setopt( $CH, CURLOPT_RETURNTRANSFER, 假 );
curl_setopt( $CH, CURLOPT_HEADER, 假 );
curl_setopt( $CH, CURLOPT_FOLLOWLOCATION, true );
curl_setopt( $CH, CURLOPT_MAXREDIRS, 3 );
curl_exec( $CH );
$标题= curl_getinfo( $CH );
curl_close( $CH );
如果($头['HTTP_CODE'] === 200)
{
$CH = curl_init($avatar_from_gravatar);
$FP =的fopen($root_path_local . $img_name . '-hidpi.png', 'WB');
curl_setopt($CH,CURLOPT_USERAGENT,“的Mozilla / 5.0 (Windows NT的 6.1; Win64平台; x64的) 为AppleWebKit / 537.36 (KHTML, 像壁虎) 镀铬/ 39.0.2171.62的Safari / 537.36');
curl_setopt($CH, CURLOPT_FILE, $FP);
curl_setopt($CH, CURLOPT_HEADER, 0);

curl_exec($CH);
curl_close($CH);

FCLOSE($FP);

$small_image = wp_get_image_editor($root_path_local . $img_name . '-hidpi.png');
如果 ( ! is_wp_error( $small_image ) )
{
$small_image->调整(40, 40, true);
$small_image->保存($root_path_local . $img_name . “巴纽”);
}
}
}
}
}
ADD_ACTION('wp_insert_comment', 'grab_avatar');






/********************************************\
* 每天刷新在后台缓存的gravatar *
\********************************************/
ADD_ACTION( 'WP', 'bones_setup_schedule' );
功能bones_setup_schedule() {
如果 ( ! wp_next_scheduled( 'bones_daily_event' ) ) {
wp_schedule_event( 时间(), '日常', 'bones_daily_event');
}
}

ADD_ACTION( 'bones_daily_event', 'bones_refresh_gravatars' );
功能bones_refresh_gravatars()
{
//get list of gravatars somehow
global $wpdb;
$comment_author_emails = $ wpdb->get_results( "SELECT DISTINCT(comment_author_email) 从 " . $wpdb->字首 . "注释" );
的foreach($comment_author_emails为$关键=> $VAL)
{
的foreach($VAL为$ a => $b)
{
grab_avatar('','',true,$b);
}
}
}

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