Web
Build a Reverse Proxy in Go With httputil ReverseProxy
Build a reverse proxy in Go with httputil.ReverseProxy: Rewrite instead of Director, forwarded headers, error handling, streaming and path based routing.
14 min read
Topic
Networking
Sockets below HTTP: TCP and UDP servers, TLS, DNS, timeouts, proxies, WebSockets and protocols you write yourself.
Web
WebSockets in Go With a Real Hub Design and Backpressure
Build a WebSocket hub in Go with gorilla/websocket: origin checks, read limits, ping and pong, per client send queues and a rule for slow consumers.
13 min read
Web
Proxy Support and Environment Variables in Go HTTP Code
How Go's HTTP client reads HTTP_PROXY, HTTPS_PROXY and NO_PROXY, which hosts it never proxies, why runtime changes are ignored, and how to set one yourself.
7 min read
Web
Server Sent Events in Go for Live Browser Updates Explained
Build a server sent events endpoint in Go with flushing, event ids, Last-Event-ID resume, heartbeats and clean shutdown, and see the wire format it sends.
7 min read
Web
HTTP 2 and HTTP 3 in Go and What Works Out of the Box
See what Go gives you for HTTP/2 and HTTP/3 with no extra code, count connections to prove multiplexing, and use cleartext h2c with http.Protocols.
8 min read
Web
Address Already in Use in Go and How to Free the Port
Fix listen tcp bind address already in use in a Go server: find the process holding the port, handle containers and restarts, and use port 0 in tests.
8 min read
Web
Build a Load Balancer in Go With Active Health Checks
Build an HTTP load balancer in Go with round robin and least connections, active health checks with rise and fall thresholds, and passive failure marking.
14 min read
WebGuide
The Go HTTP Client and Why the Default Is Dangerous
The zero value http.Client and http.Get have no timeout, lose connections when a body is not drained and read unlimited data. See each failure and its fix.
15 min read
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