ua-tracer
by Paul Kinlan
trace H3p19CwZ
what does a user agent actually fetch, follow & run?
Trace H3p19CwZ
First seen: 2026-07-31 06:29:34.800 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 |
|---|---|---|---|---|
| 2026-07-31 06:29:34.800 UTC | +0 ms | homepage | GET | Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html) |
request headers (10){
"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": "00-53ee90211df362ae2ed6d51ee18eaa00-3adb3121685aac37-01",
"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"
}
|
||||
| 2026-07-31 06:29:37.775 UTC | +2975 ms | CSS | GET | Mozilla/5.0 (compatible; Baiduspider-render/2.0; +http://www.baidu.com/search/spider.html) |
request headers (13){
"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=H3p19CwZ",
"host": "uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-8a1a7e1992795447afd8690c7ea8d7b3-30a049921b86b2ed-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": "00-8a1a7e1992795447afd8690c7ea8d7b3-e52d16d192b21078-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-07-31 06:29:37.781 UTC | +2981 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=H3p19CwZ",
"host": "uatracer.com",
"origin": "https://uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-aa9f6c7baf953a8c0d24de9b4ec978a5-04495013b4d2facf-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-aa9f6c7baf953a8c0d24de9b4ec978a5-945b18b696d923cc-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-07-31 06:29:37.811 UTC | +3011 ms | font (HTML) | 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=H3p19CwZ",
"host": "uatracer.com",
"origin": "https://uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-ecf2041e78f036d17b3fdaae22f5c4d9-1b217db7c912013d-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-ecf2041e78f036d17b3fdaae22f5c4d9-48726971b54390c4-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-07-31 06:29:37.839 UTC | +3039 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=H3p19CwZ",
"host": "uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-a123190ac7fe98f758330c769de07e7c-2f535cd170b32b4f-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-a123190ac7fe98f758330c769de07e7c-b1d0b3d82f5340b0-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-07-31 06:29:37.863 UTC | +3063 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=H3p19CwZ",
"host": "uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-a5753c7bc7358cb3adcd8a99d58f4ade-eae57ca4ff7af8e1-01",
"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-a5753c7bc7358cb3adcd8a99d58f4ade-019059b430e23056-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-07-31 06:29:37.867 UTC | +3067 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=H3p19CwZ",
"host": "uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-4c9a7325333ebf197c783b8c11d792a1-be26fd849ab62deb-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": "00-4c9a7325333ebf197c783b8c11d792a1-21c6204ad3702df3-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-07-31 06:29:37.883 UTC | +3083 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=H3p19CwZ",
"host": "uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-fe0e2ed137959b25e2448cecbee09bd8-bd8b571e7b43176e-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-fe0e2ed137959b25e2448cecbee09bd8-bbf88f96857d93bb-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-07-31 06:29:37.919 UTC | +3119 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=H3p19CwZ",
"host": "uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-187c92ff72b51edc3a51b1442d96bf40-cec774bc981ebd89-01",
"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": "00-187c92ff72b51edc3a51b1442d96bf40-963914ff77081c15-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-07-31 06:29:38.999 UTC | +4199 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=H3p19CwZ",
"host": "uatracer.com",
"referer": "https://uatracer.com/r/H3p19CwZ/YyWeXPCW/style.css",
"traceparent": "00-4dda3d400edbcae5c870026d388337a7-fbb8261a45efdd0b-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"
}
|
||||
| 2026-07-31 06:29:41.603 UTC | +6803 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=H3p19CwZ",
"host": "uatracer.com",
"referer": "https://uatracer.com/r/H3p19CwZ/YyWeXPCW/iframe",
"traceparent": "00-c7cd7731e5013220eb3a0359dfb5300c-10f37709b45898a8-01",
"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-c7cd7731e5013220eb3a0359dfb5300c-035c12bd803a169d-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-07-31 06:29:41.987 UTC | +7187 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=H3p19CwZ",
"host": "uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-64e4f0c3b3f6d4bbadb890b4c229d0a2-9a448eab97ac6854-01",
"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": "00-64e4f0c3b3f6d4bbadb890b4c229d0a2-c1a7d758321eb1e4-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-07-31 06:29:42.031 UTC | +7231 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=H3p19CwZ",
"host": "uatracer.com",
"origin": "https://uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-1ee42c783b271399fad760e82297a3ba-a2912e7d335054f3-01",
"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"
}
|
||||
| 2026-07-31 06:29:42.037 UTC | +7237 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=H3p19CwZ",
"host": "uatracer.com",
"origin": "https://uatracer.com",
"referer": "https://uatracer.com/r/H3p19CwZ/YyWeXPCW/style.css",
"traceparent": "00-ca8bff7e22e2fd3954b53aa73e91166f-8def6cecaa250ab7-01",
"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-ca8bff7e22e2fd3954b53aa73e91166f-bc3aff4306ebca05-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-07-31 06:29:42.055 UTC | +7255 ms | ES module executed | 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=H3p19CwZ",
"host": "uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-474b14cdf3ca00510f78504d1593f84f-100ed00fda154be4-01",
"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": "00-474b14cdf3ca00510f78504d1593f84f-56b1e526c58d933d-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-07-31 06:29:42.155 UTC | +7355 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=H3p19CwZ",
"host": "uatracer.com",
"origin": "https://uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-7a2890485b8ac0aa8b7832f35aa8d1a8-90392c8f0f0168e7-01",
"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": "00-7a2890485b8ac0aa8b7832f35aa8d1a8-68e83f0f5230a210-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-07-31 06:29:42.999 UTC | +8199 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=H3p19CwZ",
"host": "uatracer.com",
"referer": "https://uatracer.com/r/H3p19CwZ/YyWeXPCW/style.css",
"traceparent": "00-ef6ba9dbd68ecfa9161ff216accb0998-25d72d1094ac22f2-01",
"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-ef6ba9dbd68ecfa9161ff216accb0998-f27089e148f353a0-01",
"x-deno-userspace-tracestate": ""
}
|
||||
| 2026-07-31 06:29:46.223 UTC | +11423 ms | client timing 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=H3p19CwZ",
"host": "uatracer.com",
"origin": "https://uatracer.com",
"referer": "https://uatracer.com/",
"traceparent": "00-220b545381754f5454471eed2527b066-67b592b269d8c73a-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"
}
|
||||
Client-side resource waterfall
JS executed (beacon hit) but no resource-timing payload was posted (UA may block sendBeacon/fetch or strip the body).