使用 prerender 实现 SEO

server {
    listen 80;
    server_name www.umount.com;

    access_log /var/log/nginx/livefrontend/access.log LFE_multidomain;
    error_log  /var/log/nginx/livefrontend/error.log;

    include /opt/nginx-backend/common/default_error_location.conf;
    include /opt/nginx-backend/common/crossdomain.conf;

    proxy_set_header Host zhangyu.tv;
    proxy_set_header X-Real-IP $x_real_ip;
    proxy_set_header X-Client-IP $x_client_ip;
    proxy_connect_timeout 120s;
    proxy_read_timeout 120s;
    proxy_send_timeout 120s;

    location /test {
        access_log off;
        return 200;
    }

    ##### prerender #### 部分
    root   /html/;
    location /buluo {
        # try_files $uri 用于出去 node 中的 # 问题
        # 定义别名   prerender_buluo 
        try_files $uri @prerender_buluo;
    }
    # 引用 prerender_buluo 别名
    location @prerender_buluo {
        proxy_set_header X-Prerender-Token 【自己prerender的Token值】;

        set $prerender 0;
        # 搜索引擎收录地址
        if ($http_user_agent ~* "googlebot|bingbot|yandex|baiduspider|twitterbot|facebookexternalhit|rogerbot|linkedinbot|embedly|quora link preview|showyoubot|outbrain|pinterest\/0\.|pinterestbot|slackbot|vkShare|W3C_Validator") {
            set $prerender 1;
        }
        if ($args ~ "_escaped_fragment_") {
            set $prerender 1;
        }
        if ($http_user_agent ~ "Prerender") {
            set $prerender 0;
        }
        if ($uri ~* "\.(js|css|xml|less|png|jpg|jpeg|gif|pdf|doc|txt|ico|rss|zip|mp3|rar|exe|wmv|doc|avi|ppt|mpg|mpeg|tif|wav|mov|psd|ai|xls|mp4|m4a|swf|dat|dmg|iso|flv|m4v|torrent|ttf|woff|svg|eot)") {
            set $prerender 0;
        }

        #resolve using Google's DNS server to force DNS resolution and prevent caching of IPs
        resolver 8.8.8.8;

        if ($prerender = 1) {

            #setting prerender as a variable forces DNS resolution since nginx caches IPs and doesnt play well with load balancing
            # prerender 官方地址可自建
            set $prerender "service.prerender.io";
            #rewrite .* /$scheme://$host$request_uri? break;
            rewrite ^(.+)$ /$scheme://$host$request_uri? break;
            proxy_pass http://$prerender;
        }
        if ($prerender = 0) {
            rewrite .* /buluo/index.html break;
        }
    }