Primary section10 problemsCoding
CORS / HTTP / SSL
Preflight, mixed content, certificates, redirects, uploads, headers, and WebSocket proxies.
Web Protocolsintermediate
CORS preflight fails when request includes credentials
HTTPTLSCORS
DetailsAsk Puvexa
Web Protocolsintermediate
HTTPS site loads but API call is blocked as mixed content
HTTPTLS
DetailsAsk Puvexa
Web Protocolsintermediate
SSL certificate works in browser but API client rejects it
HTTPTLSSSL
DetailsAsk Puvexa
Web Protocolsintermediate
HTTP request succeeds but browser reports CORS failure
HTTPTLSCORS
DetailsAsk Puvexa
Web Protocolsintermediate
TLS certificate renewal completes but old certificate remains active
HTTPTLS
DetailsAsk Puvexa
Web Protocolsintermediate
WebSocket connects locally but fails behind HTTPS proxy
HTTPTLSWebSocket
DetailsAsk Puvexa
Web Protocolsintermediate
Browser caches an old redirect after server configuration changed
HTTPTLS
DetailsAsk Puvexa