Gin Route Wildcard Param Collision With Static Subroutes
Gin's router panics at startup (not at request time) when it detects a conflict between a wildcard parameter route and a static route sharing an ambiguous path...
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Nginx 504 Gateway Timeout on Long-Running API Request
A 504 Gateway Timeout on a request that's legitimately slow (a large report generation, a heavy computation, a batch operation) means Nginx gave up waiting for...
Nginx CORS Header "Multiple Values" Received Error
The browser error about receiving multiple values for a CORS header means both Nginx and your backend application are independently setting the same...
Nginx HTTP to HTTPS Redirect Loop Behind Load Balancer
An HTTP-to-HTTPS redirect loop behind a load balancer happens because the load balancer terminates SSL and forwards plain HTTP to Nginx internally — Nginx,...
Nginx proxy_pass Stripping URL Path Prefix Unexpectedly
Whether proxy_pass strips the matched location prefix from the URL before forwarding to the upstream depends on a small, easy-to-miss detail in how the...
Nginx WebSockets Connection Failing With 400 Bad Request
A WebSocket connection failing with 400 Bad Request through Nginx almost always means Nginx isn't forwarding the specific headers required for the...
Gin Custom Validation Error Messages Returning Raw Internal Errors
When Gin's binding validation errors are returned to clients as raw, unfriendly text straight from the underlying validator library, it's because the default...
Gin Panic Recovery Middleware Returning Empty 500 Response
Gin's built-in Recovery() middleware correctly prevents a panic from crashing the entire server, but its default behavior returns a 500 status with no response...
Nginx client_max_body_size, Fixing "413 Request Entity Too Large"
A 413 error means Nginx itself rejected the request before it ever reached your application, because the request body exceeded the configured...