解决Gravatar头像、Google fonts和Google ajax不能使用的方法

Gravatar头像现在大陆地区偶尔无法访问，还有各种google服务也用不了。对于“一枚程序员”来说是不能容忍的。
于是麦葱弄了个解决之法——使用nginx反向代理Gravatar头像、Google fonts和Google ajax。
反代之前需要确定nginx已经安装了proxy_cache模块并配置好路径及参数。

下面是麦葱在nginx.conf中配置的代码：

http
{
    #其他代码...#

    proxy_connect_timeout 5;
    proxy_read_timeout 60;
    proxy_send_timeout 5;
    proxy_buffer_size 16k;
    proxy_buffers 4 64k;
    proxy_busy_buffers_size 128k;
    proxy_temp_file_write_size 128k;
    proxy_temp_path /tmp/nginx_proxy_temp 1 2;  #临时文件目录

    #其他代码...#
}

然后是单独的配置文件gravatar.conf，带#的需要你进行相应修改：

proxy_cache_path  /tmp/nginx_proxy_cache/gravatar levels=1:2 keys_zone=GRAVATAR:32m inactive=7d max_size=1g; #缓存路径

server {
    listen 80;
    server_name gravatar.yuxiaoxi.com; #绑定的域名

    location  / {
        proxy_cache GRAVATAR;
        proxy_cache_key "$scheme://$host$request_uri";
        proxy_cache_valid 200 304 7d;
        proxy_cache_valid 301 3d;
        proxy_cache_valid any 10s;

        proxy_pass http://0.gravatar.com; #反代的域名
        proxy_pass_header Server;
        proxy_redirect off;
        proxy_set_header Host 0.gravatar.com;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Scheme $scheme;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    }

    location ~ /purge(/.*) {
        allow 127.0.0.1;
        deny all;
        proxy_cache_purge GRAVATAR "$scheme://$host$1";
    }

    location ~* ＼.(ftpquota|htaccess|htpasswd|asp|aspx|jsp|asa|mdb)?$ {
        deny all;
    }

    access_log /home/wwwroot/gravatar/log/access.log combined; #access_log end
    error_log /home/wwwroot/gravatar/log/error.log crit; #error_log end
}

server
{
    listen       443 ssl spdy;
    server_name gravatar.yuxiaoxi.com; #绑定的域名

    ssl on;
    ssl_certificate /usr/local/ssl/yuxiaoxi.crt; #ssl证书
    ssl_certificate_key /usr/local/ssl/yuxiaoxi.pem; #ssl密钥
    ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
    ssl_ciphers 'ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:DHE-DSS-AES256-SHA:DHE-RSA-AES256-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128:AES256:AES:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK';
    ssl_prefer_server_ciphers on;
    ssl_session_timeout 5m;
    ssl_session_cache shared:SSL:10m;
    ssl_trusted_certificate /usr/local/ssl/ca.crt; #CA根证书

    location  / {
        proxy_cache GRAVATAR;
        proxy_cache_key "$scheme://$host$request_uri";
        proxy_cache_valid 200 304 7d;
        proxy_cache_valid 301 3d;
        proxy_cache_valid any 10s;

        proxy_pass http://0.gravatar.com; #反代的域名
        proxy_pass_header Server;
        proxy_redirect off;
        proxy_set_header Host 0.gravatar.com;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Scheme $scheme;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    }

    location ~ /purge(/.*) {
        allow 127.0.0.1;
        deny all;
        proxy_cache_purge GRAVATAR "$scheme://$host$1";
    }

    location ~* ＼.(ftpquota|htaccess|htpasswd|asp|aspx|jsp|asa|mdb)?$ {
        deny all;
    }

    access_log /home/wwwroot/gravatar/log/access_ssl.log combined; #access_log end
    error_log /home/wwwroot/gravatar/log/error_ssl.log crit; #error_log end
}

Google fonts和Google ajax配置差不多，我就不贴出来了，请在文尾查看下载链接。
你也可以直接使用麦葱弄好的，支持SSL哦~：

将www.gravatar.com,cn.gravatar.com,0.gravatar.com,1.gravatar.com,2.gravatar.com替换为gravatar.yuxiaoxi.com；
将fonts.gstatic.com替换为fonts.yuxiaoxi.com；
将ajax.googleapis.com替换为ajax.yuxiaoxi.com；

BYMT主题用户修改办法：

1、打开/wp-content/themes/BYMT/目录下的functions.php文件
2、搜索bymt_get_avatar，将gravatar.duoshuo.com替换为gravatar.yuxiaoxi.com
3、搜索bymt_avatar，从//获取头像及缓存开始，到//分页功能上一行，替换为：
// 通过curl获取内容
function bymt_curl_contents($url){
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
    curl_setopt($ch, CURLOPT_URL, $url);
    $response =  curl_exec($ch);
    curl_close($ch);

    /** 请求为空 **/
    if(empty($response)){
        $response = '';
    }

    return $response;
}

// 写文件
function bymt_write_file($path, $data, $mode = 'wb') {
    if ( ! $fp = @fopen($path, $mode)) {
        return false;
    }

    flock($fp, LOCK_EX);
    fwrite($fp, $data);
    flock($fp, LOCK_UN);
    fclose($fp);

    return true;
}

//获取头像及缓存
function bymt_avatar($email, $size='50', $time='1209600') { // 默认尺寸50px 有效期14天
    if ( !is_numeric($size) ) $size = '50';
    if ( !is_numeric($time) ) $time = '1209600';
    if(bymt_c('avatar_cache') ){
        $mailhash = md5(strtolower(trim($email)));
        $default = urlencode(get_option('avatar_default'));
        $rating = get_option('avatar_rating');
        $ava_path = ABSPATH . 'avatar/' . $mailhash. '-' . $size . '.jpg';
        if ( ! file_exists($ava_path) || filesize($ava_path) < 1 || (time() - filemtime($ava_path)) > $time) {
            $ava_url = 'http://gravatar.yuxiaoxi.com/avatar/'.$mailhash.'?s='.$size.'&d='.$default.'&r='.$rating;
            $avadata = bymt_curl_contents($ava_url);
            bymt_write_file($ava_path, $avadata);
        } else {
            $ava_url = esc_url(home_url('/avatar/')) . $mailhash. '-' . $size . '.jpg';
        }
        return '';
    }else{
        return get_avatar( $email, $size );
    }
}

4、打开/wp-includes/script-loader.php，搜索ajax.googleapis.com替换为ajax.yuxiaoxi.com，搜索 fonts.gstatic.com替换为fonts.yuxiaoxi.com；
搞定收工！