server {
    listen 18000;
    client_max_body_size 500M;

    # 1. Stirling PDF
    location /pdf/ {
        proxy_pass http://127.0.0.1:18080/;
        proxy_set_header Host $host;
        proxy_set_header Accept-Encoding "";
        proxy_buffering off;
        sub_filter_once off;
        sub_filter '"/api/' '"/pdf-api/';
    }
    location /pdf-api/ {
        proxy_pass http://127.0.0.1:18080/api/;
        proxy_set_header Host $host;
        proxy_buffering off;
        client_max_body_size 500M;
    }

    # 2. Excalidraw
    location /draw/ {
        proxy_pass http://127.0.0.1:18081/;
        proxy_set_header Host $host;
    }
    location /assets/ { proxy_pass http://127.0.0.1:18081/assets/; }
    location /v1/ai/ {
        proxy_pass http://127.0.0.1:18082/v1/ai/;
        proxy_set_header Host $host;
        proxy_read_timeout 60s;
        proxy_buffering off;
    }

    # 3. TrWebOCR
    location /ocr/ {
        proxy_pass http://127.0.0.1:18083/;
        proxy_set_header Host $host;
        proxy_buffering off;
    }

    # 4. LibreTranslate
    location /translate/ {
        proxy_pass http://127.0.0.1:18084/;
        proxy_set_header Host $host;
    }

    # 5. PPTist
    location /ppt/ {
        proxy_pass http://127.0.0.1:18085/;
        proxy_set_header Host $host;
        proxy_buffering off;
    }
    location /pptapi/ {
        proxy_pass http://127.0.0.1:18086/;
        proxy_http_version 1.1;
        proxy_set_header Connection "";
        proxy_buffering off;
        proxy_cache off;
    }

    # 6. imgcompress
    location /imgcompress/ {
        proxy_pass http://127.0.0.1:18087/;
        proxy_set_header Host $host;
    }

    # 7. Lama Cleaner
    location /lama/ {
        proxy_pass http://127.0.0.1:18088/;
        proxy_set_header Host $host;
        proxy_buffering off;
    }
    location /lama/inpaint {
        proxy_pass http://127.0.0.1:18088/inpaint;
        proxy_set_header Host $host;
        proxy_buffering off;
        proxy_read_timeout 300s;
        client_max_body_size 500M;
    }
    # Lama Cleaner 的2个精确static文件
    location /static/js/main.1bd455bc.js { proxy_pass http://127.0.0.1:18088/static/js/main.1bd455bc.js; }
    location /static/css/main.c28d98ca.css { proxy_pass http://127.0.0.1:18088/static/css/main.c28d98ca.css; }

    # /static/ 其余的给 LibreTranslate
    location /static/ { proxy_pass http://127.0.0.1:18084/static/; }

    # LibreTranslate 绝对路径 API
    location /languages { proxy_pass http://127.0.0.1:18084/languages; }
    location /frontend/settings { proxy_pass http://127.0.0.1:18084/frontend/settings; }
    location /detect { proxy_pass http://127.0.0.1:18084/detect; }

    # imgcompress 绝对路径
    location /_next/ { proxy_pass http://127.0.0.1:18087/_next/; }
    location /api/ {
        proxy_pass http://127.0.0.1:18087/api/;
        proxy_set_header Host $host;
        proxy_buffering off;
        client_max_body_size 500M;
    }

    # 8. webp2jpg
    location /webp2jpg/ {
        proxy_pass http://127.0.0.1:18089/;
        proxy_set_header Host $host;
    }
    location /cdn/ { proxy_pass http://127.0.0.1:18089/cdn/; }

    # 9. Overleaf
    location /overleaf/ {
        proxy_pass http://127.0.0.1:18090/;
        proxy_set_header Host $host;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_buffering off;
    }

    # 10. LaTeX 公式编辑器
    location /latex/ {
        proxy_pass http://127.0.0.1:18091/;
        proxy_set_header Host $host;
    }

    # 默认回落到 Overleaf
    location / {
        proxy_pass http://127.0.0.1:18090;
        proxy_set_header Host $host;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_buffering off;
    }
}