解决fonts.googleapis.com访问慢的问题

众所周知的原因，fonts.googleapis.com和fonts.gstatic.com在国内是基本无法访问的情况，因此使用了Google字体样式资源的WP主题国内体验极差，严重影响网站打开速度。

如果你的WordPress服务器也在国外就好办了，通过自己架设一个nginx代理，进行加速。

方法如下：

1. 安装Nginx

Nginx安装需要--with-http_slice_module支持slice指令,和substitutions模块，不支持的请升级之，参考官网文档：substitutions

CentOS7的也可以直接下载RPM包安装 https://repo.conf.top/centos/7/x86_64/
或者自行RPMBUILD构建，SPEC文件参考 https://git.conf.top/public/rpmbuild

2. Nginx配置

Nginx增加vhost配置，配置如下：

# 开启缓存
#proxy_cache_path  /data/cache/nginx/proxy_cache/ levels=1:2 keys_zone=proxy:128m inactive=30d max_size=1024m;

map $request_uri $myproxy_uri {
    default "/";
    "~^/https?://[^/:]+(:[0-9]{1,5})?(?<myproxyuri>/.*)" "$myproxyuri";
}

map $request_uri $myproxy_host {
    default "www.google.com";
    "~^/https?://(?<myproxyhost>[a-z0-9\.-]+)[/|:]?" "$myproxyhost";
}

map $request_uri $myproxy_port {
    default "";
    "~^/https?://[^/:]+(?<myproxyport>:[0-9]{1,5})" "$myproxyport";
}

map $request_uri $myproxy_scheme {
    default $scheme;
    "~^/(?<myproxyscheme>https?)://" "$myproxyscheme";
}

map $myproxy_uri $myproxy_uri_dir {
    default "/";
    "~(?<myproxyuridir>/.+/)[^/]+$" "$myproxyuridir";
}

map $myproxy_uri $myproxy_uri_file {
    default "";
    "~(?<myproxyurifile>[^/]*)$" "$myproxyurifile";
}

server {
        listen              80;
        listen              [::]:80;
        #listen              443 ssl http2;
        #listen              [::]:443 ssl http2;
        server_name         cdn.conf.top;

        #include             ssl_base.conf;
        #include             ssl_cert_default.conf;

        #access_log          off;
        #error_log           /dev/null

        set $nr "0";
        if ($myproxy_uri = "/") {
            set $nr "${nr}0";
        }
        if ($request_uri ~ '[^/]$') {
            set $nr "${nr}0";
        }
        if ($nr = "000") {
            rewrite . $scheme://$host:$server_port/$myproxy_scheme://$myproxy_host$myproxy_port/ redirect;
        }

        # 通用配置，页面中大部分链接都可以替换，目前已知问题是用js动态生成的不行
        subs_filter_types text/css text/xml text/plain text/javascript application/x-javascript application/javascript application/json;
        subs_filter (<|\\s)(src|href|action|srcset)\\s*=\\s*('|")(https?://)([^/'">]+)/ $1$2=$3$scheme://$host:$server_port/\$5/ irg;
        subs_filter (<|\\s)(src|href|action|srcset)\\s*=\\s*('|")// $1$2=$3$scheme://$host:$server_port/$myproxy_scheme:// irg;
        subs_filter (<|\\s)(src|href|action|srcset)\\s*=\\s*('|")/([^/'">]+) $1$2=$3$scheme://$host:$server_port/$myproxy_scheme://$myproxy_host$myproxy_port/\ irg;
        subs_filter (<|\\s)(src|href|action|srcset)\\s*=\\s*('|")\.\./([^/]+['">]) $1$2=$3$scheme://$host:$server_port/$myproxy_scheme://$myproxy_host$myproxy_port/\ irg;
        subs_filter (<|\\s)(src|href|action|srcset)\\s*=\\s*('|")(\.\./[^/]+/) $1$2=$3$scheme://$host:$server_port/$myproxy_scheme://$myproxy_host$myproxy_port$myproxy_uri_dir$4 irg;
        subs_filter (:|\\s)url\\s*\\(\\s*('|"|)(https?://)([^/'"\\)\;]+)/ $1url($2$scheme://$host:$server_port/\$4/ irg;
        subs_filter (:|\\s)url\\s*\\(\\s*('|"|)// $1url($2$scheme://$host:$server_port/$myproxy_scheme:// irg;
        subs_filter (:|\\s)url\\s*\\(\\s*('|"|)/([^/'"\\)\;]+) $1url($2$scheme://$host:$server_port/$myproxy_scheme://$myproxy_host$myproxy_port/\ irg;
        subs_filter (:|\\s)url\\s*\\(\\s*('|"|)\.\./([^/]+['|"|\\)]) $1url($2$scheme://$host:$server_port/$myproxy_scheme://$myproxy_host$myproxy_port/\ irg;
        subs_filter (:|\\s)url\\s*\\(\\s*('|"|)(\.\./[^/]+/) $1url($2$scheme://$host:$server_port/$myproxy_scheme://$myproxy_host$myproxy_port$myproxy_uri_dir$3 irg;

        # 开启缓存
        #proxy_cache             proxy;
        #proxy_cache_key         $myproxy_host$myproxy_port$myproxy_uri$is_args$args$slice_range;
        #proxy_cache_valid       200 206 304 30d;
        #proxy_cache_valid       301 302 5s;
        #proxy_cache_valid       401 403 404 500 503 5s;
        more_set_headers        "X-Cache: $upstream_cache_status";

        more_set_headers        "Access-Control-Allow-Origin: *";
        more_set_headers        "Access-Control-Allow-Methods: GET";
        proxy_hide_header       Set-Cookie;
        proxy_hide_header       Alt-Svc;
        proxy_hide_header       p3p;
        proxy_hide_header       x-content-type-options;

        location = /favicon.ico { log_not_found off; access_log off; }
        location = /robots.txt { access_log off; echo "User-agent: *"; echo "Disallow: /"; }

        # 安全限制，禁止内网代理
        if ($myproxy_host ~ '^(127|10|172\.(1[6-9]|2[0-9]|3[0-1])|192\.168)\.') {
            return 401;
        }

        if ($myproxy_host ~* '(localhost|localdomain|conf.top)' ) {
            return 401;
        }

        location /http {
            # 安全限制
            #if ( $request_method !~ GET|HEAD ) {
            #    return 403;
            #}
            slice               1m;
            add_header          X-Proxy-Scheme   $myproxy_scheme;
            add_header          X-Proxy-Host     $myproxy_host;
            add_header          X-Proxy-Port     $myproxy_port;
            add_header          X-Proxy-Uri      $myproxy_uri;
            add_header          X-Proxy-Uri-Dir  $myproxy_uri_dir;
            add_header          X-Proxy-Uri-File $myproxy_uri_file;
            proxy_ignore_headers Expires Cache-Control;
            proxy_ssl_server_name on;
            proxy_set_header    Referer $myproxy_scheme://$myproxy_host$myproxy_port$myproxy_uri;
            proxy_set_header    Host    $myproxy_host;
            proxy_set_header    Range   $slice_range;
            proxy_set_header    Accept-Encoding  "";
            proxy_pass          $myproxy_scheme://$myproxy_host$myproxy_port$myproxy_uri;
            proxy_redirect      ~^(/.*)  $scheme://$host:$server_port/$myproxy_scheme://$myproxy_host$myproxy_port/\;
            proxy_redirect      ~^(http.+) $scheme://$host:$server_port/\;
        }

        location / {
            #access_log off;
            #error_log /dev/null;
            return 403;
        }
}

例如：https://fonts.googleapis.com/css?family=Roboto
对应代理后：https://cdn.conf.top/https://fonts.googleapis.com/css?family=Roboto