Technical Information
| HTTP Status Code | 200 |
| HTTP Version | HTTP/1.1 |
| HTTPS | ✔ Available |
| IP Address | 8.210.162.153 |
| Server Software | openresty |
| Compression | gzip |
|
🔒 🟡 Mixed Content (41 HTTP resources) | The page is served over HTTPS but loads 41 resource(s) over HTTP. This may be blocked in modern browsers. |
|
ℹ 🔵 Missing HSTS | HTTP Strict Transport Security is not configured. Recommended for HTTPS sites. |
|
ℹ 🔵 Missing Content Security Policy | CSP is not configured. It helps prevent XSS attacks and content injection. |
|
ℹ 🔵 Missing X-Frame-Options | The site can be embedded in iframes by third parties (clickjacking risk). |
HTTP Status Code 200
HTTP Version HTTP/1.1
HTTPS ✔ Available
IP Address 8.210.162.153
Server Software openresty
Compression gzip
🔒 🟡 Mixed Content (41 HTTP resources) The page is served over HTTPS but loads 41 resource(s) over HTTP. This may be blocked in modern browsers.
ℹ 🔵 Missing HSTS HTTP Strict Transport Security is not configured. Recommended for HTTPS sites.
ℹ 🔵 Missing Content Security Policy CSP is not configured. It helps prevent XSS attacks and content injection.
ℹ 🔵 Missing X-Frame-Options The site can be embedded in iframes by third parties (clickjacking risk).
Redirect Chain
| # | URL | HTTP Status Code | Status |
| 1 | https://duwenzhang.com:443 | 301 | HTTP/2 301 |
| 2 | http://www.duwenzhang.com/ | 200 | HTTP/1.1 200 OK |
#1 URL https://duwenzhang.com:443
HTTP Status Code 301
Status HTTP/2 301
#2 URL http://www.duwenzhang.com/
HTTP Status Code 200
Status HTTP/1.1 200 OK
Performance
| DNS Lookup | 251.7 ms |
| TCP Connect | 443 ms |
| TLS Handshake | ~80 ms |
| Time To First Byte (TTFB) | 638.8 ms |
| Content Download | 6.9 ms |
| Total Response Time | 645.8 ms |
DNS Lookup 251.7 ms
TCP Connect 443 ms
TLS Handshake ~80 ms
Time To First Byte (TTFB) 638.8 ms
Content Download 6.9 ms
Total Response Time 645.8 ms
Security
| HTTPS | ✔ Enabled |
| HSTS | ✘ Not configured |
| CSP | ⚠ Not configured |
| X-Frame-Options | ⚠ Not configured |
| X-Content-Type-Options | ⚠ Not configured |
| HTTP/2 | ⚠ HTTP/1.1 |
HTTPS ✔ Enabled
HSTS ✘ Not configured
CSP ⚠ Not configured
X-Frame-Options ⚠ Not configured
X-Content-Type-Options ⚠ Not configured
HTTP/2 ⚠ HTTP/1.1
SEO Quick Check
Title Ķ --Ĺ-ɢ
Detected Technologies
| Technology | Google Analytics PHP |
Technology Google Analytics PHP
HTTP Headers
| Server
| openresty |
| Date
| Tue, 25 Aug 2026 00:28:36 GMT |
| Content-Type
| text/html; charset=GB2312 |
| Transfer-Encoding
| chunked |
| Connection
| keep-alive |
| Vary
| Accept-Encoding |
| Cache-Control
| no-cache, no-store, max-age=0, must-revalidate |
| Access-Control-Allow-Origin
| * |
| Content-Encoding
| gzip |
Meta Tags
| Content-Type | text/html; charset=gb2312 |
Server openresty
Date Tue, 25 Aug 2026 00:28:36 GMT
Content-Type text/html; charset=GB2312
Transfer-Encoding chunked
Connection keep-alive
Vary Accept-Encoding
Cache-Control no-cache, no-store, max-age=0, must-revalidate
Access-Control-Allow-Origin *
Content-Encoding gzip
