502 response

What 502 response does not show

Related terms in HTTP, edge and rendering

The delivery layer between an origin and a client: proxies, caches, redirects, status codes and the headers that decide what a crawler actually received.

Origin server · Reverse proxy · CDN · Edge node · WAF · Bot score · TLS handshake · DNS resolution · DNS timeout · Connection timeout · Read timeout · Redirect chain · Redirect loop · 301 redirect · 302 redirect · 307 redirect · 308 redirect · 304 response · 404 response · 410 response · 429 response · 500 response · 503 response · 504 response · HEAD request · GET request · Content type · MIME sniffing · Content encoding · Compression · Brotli · ETag · Last-Modified · If-None-Match · Cache hit · Cache miss · Cache key · Vary header · Stale response · Stale-while-revalidate · Edge redirect · Origin bypass · Response parity · Header parity · hreflang · canonical URL · HSTS · HSTS preload list · Content-Security-Policy · CSP nonce · edge cache · cache split · cache-buster · Cache-Control · Age header · render-blocking resource · payload text share · lazy loading · 404 and 410 status codes

Questions about 502 response

What is 502 response?

“Bad Gateway,” returned when an intermediary receives an invalid response from an upstream server.

What does 502 response not show or guarantee?

It can originate at a CDN or proxy rather than the website application.

Which area of the glossary does 502 response belong to?

HTTP, edge and rendering: The delivery layer between an origin and a client: proxies, caches, redirects, status codes and the headers that decide what a crawler actually received.

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