# read.xpcool.com — 轻阅读 Web 端
# 后端：Docker qread 容器，宿主端口 8082
#
# 2026-09-14 性能优化：
#   前端为 Flutter Web 产物，main.dart.js 达 12.75MB、canvaskit.wasm 达 6.76MB，
#   且应用侧未做任何压缩与缓存（实测响应头无 Content-Encoding / Cache-Control）。
#   本次开启 gzip（实测可省约 70% 流量）并分级加缓存头。

server {
    listen 80;
    server_name read.xpcool.com;
    return 301 https://$host$request_uri;
}

server {
    listen 443 ssl http2;
    server_name read.xpcool.com;

    ssl_certificate     /data/nginx/ssl/read.xpcool.com/read.xpcool.com_bundle.crt;
    ssl_certificate_key /data/nginx/ssl/read.xpcool.com/read.xpcool.com.key;

    client_max_body_size 256m;
    proxy_read_timeout 300s;
    proxy_send_timeout 300s;

    # ---------- gzip 压缩 ----------
    # 应用侧（Solon）不压缩静态资源，全部由 nginx 承担。
    # 实测 gzip -6：main.dart.js 13.37MB→3.16MB，canvaskit.wasm 6.76MB→2.73MB。
    gzip on;
    gzip_comp_level 5;          # 5 已接近最优压缩率，比 9 明显省 CPU
    gzip_min_length 1024;
    gzip_vary on;               # 按 Accept-Encoding 分别缓存，避免代理串味
    gzip_proxied any;           # 上游（proxy_pass）响应同样压缩
    gzip_buffers 32 8k;         # 大文件压缩时加大缓冲，减少写盘/发送次数
    gzip_http_version 1.1;
    gzip_types
        text/plain
        text/css
        text/xml
        text/javascript
        application/javascript
        application/x-javascript
        application/json
        application/xml
        application/wasm          # Flutter CanvasKit / SkWasm 引擎
        image/svg+xml
        font/woff
        font/woff2;
    # text/html 为 nginx 默认包含，无需重复声明

    # ---------- Flutter 引擎资源 ----------
    # 体积最大、内容随引擎版本固定 → 长缓存，命中后完全不走网络。
    location ^~ /canvaskit/ {
        proxy_http_version 1.1;
        proxy_set_header Host              $host;
        proxy_set_header X-Real-IP         $remote_addr;
        proxy_set_header X-Forwarded-For   $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        # 上游不压缩，显式清空避免双重压缩
        proxy_set_header Accept-Encoding   "";
        proxy_pass http://127.0.0.1:8082;

        # 静态资源不需要会话，隐去无用 cookie：
        # 既省 header 体积，也让响应可被正常缓存（带 Set-Cookie 的响应在多数代理/CDN 下不可缓存）
        proxy_hide_header Set-Cookie;

        expires 30d;
        access_log off;
    }

    # ---------- Flutter 构建产物 ----------
    # 文件名固定（无内容 hash），故用中等缓存，配合 Flutter 自带 service worker 换版。
    location ~* ^/(main\.dart\.js|flutter_bootstrap\.js|flutter\.js|flutter_service_worker\.js|manifest\.json|favicon\.png|assets/|icons/) {
        proxy_http_version 1.1;
        proxy_set_header Host              $host;
        proxy_set_header X-Real-IP         $remote_addr;
        proxy_set_header X-Forwarded-For   $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_set_header Accept-Encoding   "";
        proxy_pass http://127.0.0.1:8082;

        proxy_hide_header Set-Cookie;

        expires 7d;
        access_log off;
    }

    # ---------- 应用接口与页面 ----------
    # 注意：/ 返回的 index.html 带 serviceWorkerVersion，不能缓存，保持原样。
    location / {
        # WebSocket 支持（书源调试、实时推送依赖）
        proxy_http_version 1.1;
        set $conn_upgrade "close";
        if ($http_upgrade != "") {
            set $conn_upgrade "upgrade";
        }
        proxy_set_header Upgrade    $http_upgrade;
        proxy_set_header Connection $conn_upgrade;

        proxy_pass http://127.0.0.1:8082;
        proxy_set_header Host              $host;
        proxy_set_header X-Real-IP         $remote_addr;
        proxy_set_header X-Forwarded-For   $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
    }
}