ua-tracer
by Paul Kinlan
trace V5IUG711
what does a user agent actually fetch, follow & run?
Trace V5IUG711
First seen: 2026-07-22 05:17:12.208 UTC
User-Agent: Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)
Bot verification: Not a known bot (no IP-range check applies).
What this user agent did
Directly-referenced assets:
✓ fetched CSS
✓ fetched JS
✓ fetched image
✓ fetched font (HTML)
Document-level link hints:
✗ fetched favicon
✗ fetched apple-touch-icon
✗ fetched web manifest
✓ fetched preload
✓ fetched prefetch
Second-level follows (proves it parsed the linking file):
✓ followed CSS background-image
✓ followed CSS @font-face
✗ followed manifest icon
✓ followed CSS @import
Frames (does it descend into iframes?):
✓ fetched iframe document
✓ descended into iframe (loaded inner image)
Reporting (a report-only CSP is violated by inline styles; reports can arrive via HTTP headers with no JS, or via in-page beacons):
✓ sent a CSP/Reporting report (any path)
✗ delivered via report-uri/Report-To header (no JS)
✗ delivered via in-page beacon (securitypolicyviolation / ReportingObserver)
Social embed (Open Graph / Twitter card images):
✗ fetched og:image
✗ fetched twitter:image
JavaScript execution:
✓ EXECUTED classic JS
✓ EXECUTED ES module
✗ posted client timing
Server-side request waterfall
Every request the server received for this trace, in receive order. +ms is the delta from the
homepage request.
| Received | Δ | Kind | Method | User-Agent |
|---|---|---|---|---|
| 2026-07-22 05:17:12.208 UTC | +0 ms | homepage | GET | Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html) |
request headers (12){
"accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7",
"accept-encoding": "gzip",
"accept-language": "zh-CN,en;q=0.9,en-GB;q=0.8,en-US;q=0.7,fr;q=0.6",
"connection": "Close",
"host": "uatracer.com",
"traceparent": "00-338869b03dfc1a8a64cbb7931a0af1f7-927f05a85d32f5ca-01",
"tracestate": "",
"upgrade-insecure-requests": "1",
"user-agent": "Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)",
"via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-338869b03dfc1a8a64cbb7931a0af1f7-ca13f05fc5a2469a-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-07-22 05:17:15.180 UTC | +2972 ms | JS | GET | Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html) |
request headers (13){
"accept": "*/*",
"accept-encoding": "gzip",
"accept-language": "zh-CN,en;q=0.9,en-GB;q=0.8,en-US;q=0.7,fr;q=0.6",
"connection": "Close",
"cookie": "ua-tracer-trace=V5IUG711",
"host": "uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-7878108cea0e5eb22b92b94cc4446d8f-c6ddce20660407f6-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)",
"via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-7878108cea0e5eb22b92b94cc4446d8f-ecb229c1b2d3bd99-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-07-22 05:17:15.192 UTC | +2984 ms | ES module | GET | Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html) |
request headers (14){
"accept": "*/*",
"accept-encoding": "gzip",
"accept-language": "zh-CN,en;q=0.9,en-GB;q=0.8,en-US;q=0.7,fr;q=0.6",
"connection": "Close",
"cookie": "ua-tracer-trace=V5IUG711",
"host": "uatracer.com",
"origin": "https://uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-4ea0f77c209d3cafddb40123ceae5aeb-ef7f7e5ef3757c20-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)",
"via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-4ea0f77c209d3cafddb40123ceae5aeb-d481ef392d590b0a-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-07-22 05:17:15.236 UTC | +3028 ms | iframe document | GET | Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html) |
request headers (14){
"accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7",
"accept-encoding": "gzip",
"accept-language": "zh-CN,en;q=0.9,en-GB;q=0.8,en-US;q=0.7,fr;q=0.6",
"connection": "Close",
"cookie": "ua-tracer-trace=V5IUG711",
"host": "uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-c2eaea8f18e788f381015edce4e25bad-238095127252e0ee-01",
"tracestate": "",
"upgrade-insecure-requests": "1",
"user-agent": "Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)",
"via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-c2eaea8f18e788f381015edce4e25bad-49cfa3b563ebf568-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-07-22 05:17:15.256 UTC | +3048 ms | font (HTML) | GET | Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html) |
request headers (12){
"accept": "*/*",
"accept-encoding": "gzip",
"accept-language": "zh-CN,en;q=0.9,en-GB;q=0.8,en-US;q=0.7,fr;q=0.6",
"connection": "Close",
"cookie": "ua-tracer-trace=V5IUG711",
"host": "uatracer.com",
"origin": "https://uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-bfa6f0456fee68ac20672720da762ad0-b26772be81a1565f-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)",
"via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-07-22 05:17:15.266 UTC | +3058 ms | image | GET | Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html) |
request headers (13){
"accept": "image/avif,image/webp,image/apng,image/svg+xml,image/*,*/*;q=0.8",
"accept-encoding": "gzip",
"accept-language": "zh-CN,en;q=0.9,en-GB;q=0.8,en-US;q=0.7,fr;q=0.6",
"connection": "Close",
"cookie": "ua-tracer-trace=V5IUG711",
"host": "uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-26757c9106f02cbba8cc2345b4c32928-a702fa8bbb784500-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)",
"via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-26757c9106f02cbba8cc2345b4c32928-ba4d4c5569e81372-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-07-22 05:17:15.276 UTC | +3068 ms | preload (image) | GET | Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html) |
request headers (13){
"accept": "image/avif,image/webp,image/apng,image/svg+xml,image/*,*/*;q=0.8",
"accept-encoding": "gzip",
"accept-language": "zh-CN,en;q=0.9,en-GB;q=0.8,en-US;q=0.7,fr;q=0.6",
"connection": "Close",
"cookie": "ua-tracer-trace=V5IUG711",
"host": "uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-fe2ea9d8f3c98197ef3ecdd3d5502469-5fac96f8fdad425a-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)",
"via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-fe2ea9d8f3c98197ef3ecdd3d5502469-f220e7b4ad8cd3f8-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-07-22 05:17:15.277 UTC | +3069 ms | CSS | GET | Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html) |
request headers (11){
"accept": "text/css,*/*;q=0.1",
"accept-encoding": "gzip",
"accept-language": "zh-CN,en;q=0.9,en-GB;q=0.8,en-US;q=0.7,fr;q=0.6",
"connection": "Close",
"cookie": "ua-tracer-trace=V5IUG711",
"host": "uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-8606ed3a5c785d91835b2d3f846601c6-170f2763c2c5e971-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)",
"via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-07-22 05:17:15.297 UTC | +3089 ms | prefetch | GET | Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html) |
request headers (13){
"accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7",
"accept-encoding": "gzip",
"accept-language": "zh-CN,en;q=0.9,en-GB;q=0.8,en-US;q=0.7,fr;q=0.6",
"connection": "Close",
"cookie": "ua-tracer-trace=V5IUG711",
"host": "uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-afdb9e9a01e48bfa8f2f8a55c3159d3e-bfed7c9d2949057f-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)",
"via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-afdb9e9a01e48bfa8f2f8a55c3159d3e-233ede3779dc9b38-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-07-22 05:17:17.556 UTC | +5348 ms | image inside iframe | GET | Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html) |
request headers (13){
"accept": "image/avif,image/webp,image/apng,image/svg+xml,image/*,*/*;q=0.8",
"accept-encoding": "gzip",
"accept-language": "zh-CN,en;q=0.9,en-GB;q=0.8,en-US;q=0.7,fr;q=0.6",
"connection": "Close",
"cookie": "ua-tracer-trace=V5IUG711",
"host": "uatracer.com",
"referer": "https://uatracer.com/r/V5IUG711/NxnaK3yY/iframe",
"traceparent": "00-e69b961b40cee9a336f3caa532d0d916-4e723ce254ab075f-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)",
"via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-e69b961b40cee9a336f3caa532d0d916-e47ba0e8379b5379-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-07-22 05:17:19.036 UTC | +6828 ms | CSS @import (nested stylesheet) | GET | Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html) |
request headers (11){
"accept": "text/css,*/*;q=0.1",
"accept-encoding": "gzip",
"accept-language": "zh-CN,en;q=0.9,en-GB;q=0.8,en-US;q=0.7,fr;q=0.6",
"connection": "Close",
"cookie": "ua-tracer-trace=V5IUG711",
"host": "uatracer.com",
"referer": "https://uatracer.com/r/V5IUG711/NxnaK3yY/style.css",
"traceparent": "00-0b8b24a8eb6bc8a88b698868d5da9cc0-7bfe722980507066-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)",
"via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-07-22 05:17:20.292 UTC | +8084 ms | CSP violation report (POST) | POST | Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html) |
request headers (14){
"accept": "*/*",
"accept-encoding": "gzip",
"accept-language": "zh-CN,en;q=0.9,en-GB;q=0.8,en-US;q=0.7,fr;q=0.6",
"connection": "Close",
"content-length": "0",
"content-type": "application/json",
"cookie": "ua-tracer-trace=V5IUG711",
"host": "uatracer.com",
"origin": "https://uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-964df951b036ba464c44ff672d9e1c15-6b71340205d2431e-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)",
"via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-07-22 05:17:20.322 UTC | +8114 ms | Reporting API report (POST) | POST | Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html) |
request headers (16){
"accept": "*/*",
"accept-encoding": "gzip",
"accept-language": "zh-CN,en;q=0.9,en-GB;q=0.8,en-US;q=0.7,fr;q=0.6",
"connection": "Close",
"content-length": "0",
"content-type": "application/json",
"cookie": "ua-tracer-trace=V5IUG711",
"host": "uatracer.com",
"origin": "https://uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-33818b1699a77d5ba45082c87b6b3a1a-b2fb954ac727ce06-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)",
"via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-33818b1699a77d5ba45082c87b6b3a1a-c4485df76ae18d99-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-07-22 05:17:20.380 UTC | +8172 ms | JS executed beacon | GET | Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html) |
request headers (13){
"accept": "image/avif,image/webp,image/apng,image/svg+xml,image/*,*/*;q=0.8",
"accept-encoding": "gzip",
"accept-language": "zh-CN,en;q=0.9,en-GB;q=0.8,en-US;q=0.7,fr;q=0.6",
"connection": "Close",
"cookie": "ua-tracer-trace=V5IUG711",
"host": "uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-089ead8fa43436ede8c119715554bf68-e083bfdbe0e65012-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)",
"via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-089ead8fa43436ede8c119715554bf68-9252770134405e66-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-07-22 05:17:20.384 UTC | +8176 ms | ES module executed | GET | Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html) |
request headers (11){
"accept": "image/avif,image/webp,image/apng,image/svg+xml,image/*,*/*;q=0.8",
"accept-encoding": "gzip",
"accept-language": "zh-CN,en;q=0.9,en-GB;q=0.8,en-US;q=0.7,fr;q=0.6",
"connection": "Close",
"cookie": "ua-tracer-trace=V5IUG711",
"host": "uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-1da5f992980bd09dc9955cad42215b96-d9a783aacbc25a50-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)",
"via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net"
}
|
||||
| 2026-07-22 05:17:20.408 UTC | +8200 ms | CSS @font-face | GET | Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html) |
request headers (14){
"accept": "*/*",
"accept-encoding": "gzip",
"accept-language": "zh-CN,en;q=0.9,en-GB;q=0.8,en-US;q=0.7,fr;q=0.6",
"connection": "Close",
"cookie": "ua-tracer-trace=V5IUG711",
"host": "uatracer.com",
"origin": "https://uatracer.com",
"referer": "https://uatracer.com/r/V5IUG711/NxnaK3yY/style.css",
"traceparent": "00-0d2b3ef1a3526f2004613e2ef9a5937e-335534099a4ea40d-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)",
"via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-0d2b3ef1a3526f2004613e2ef9a5937e-3c1ad4b1ad448665-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-07-22 05:17:20.444 UTC | +8236 ms | CSS background-image | GET | Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html) |
request headers (13){
"accept": "image/avif,image/webp,image/apng,image/svg+xml,image/*,*/*;q=0.8",
"accept-encoding": "gzip",
"accept-language": "zh-CN,en;q=0.9,en-GB;q=0.8,en-US;q=0.7,fr;q=0.6",
"connection": "Close",
"cookie": "ua-tracer-trace=V5IUG711",
"host": "uatracer.com",
"referer": "https://uatracer.com/r/V5IUG711/NxnaK3yY/style.css",
"traceparent": "00-bfa97c62191adda803dc29f3ae9c29d9-f3955a3b2d04a3b4-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)",
"via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-bfa97c62191adda803dc29f3ae9c29d9-fb3b66f8b1e64675-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-07-22 05:17:23.928 UTC | +11720 ms | client timing POST | POST | Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html) |
request headers (16){
"accept": "*/*",
"accept-encoding": "gzip",
"accept-language": "zh-CN,en;q=0.9,en-GB;q=0.8,en-US;q=0.7,fr;q=0.6",
"connection": "Close",
"content-length": "0",
"content-type": "application/json",
"cookie": "ua-tracer-trace=V5IUG711",
"host": "uatracer.com",
"origin": "https://uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-400bf394a09f0dcf30b094e99918db9d-3fdfc18ab5b9ac8c-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html)",
"via": "HTTP/1.1 ams.vultr.prod.deno-cluster.net",
"x-deno-userspace-traceparent": "00-400bf394a09f0dcf30b094e99918db9d-4ed2301ae2f10e96-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-07-29 14:39:25.350 UTC | +638533142 ms | iframe document | GET | Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; Amazonbot/0.1; +https://developer.amazon.com/support/amazonbot) Chrome/119.0.6045.214 Safari/537.36 |
request headers (7){
"accept-encoding": "gzip,deflate",
"connection": "close",
"host": "uatracer.com",
"traceparent": "00-f57a6e6ff2102e832af7bd39efe8d1de-ccca737be890b829-01",
"tracestate": "",
"user-agent": "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; Amazonbot/0.1; +https://developer.amazon.com/support/amazonbot) Chrome/119.0.6045.214 Safari/537.36",
"via": "HTTP/1.1 ord.vultr.prod.deno-cluster.net"
}
|
||||
Client-side resource waterfall
JS executed (beacon hit) but no resource-timing payload was posted (UA may block sendBeacon/fetch or strip the body).