CodexBloom - Programming Q&A Platform

advanced patterns with `http.ServeMux` and Custom Route Patterns in Go - Missing Route Handlers

👀 Views: 48 đŸ’Ŧ Answers: 1 📅 Created: 2025-06-19
go http routing Go

I'm having trouble with I'm working with an scenario with `http.ServeMux` when trying to set up custom route patterns in my Go application... I'm using Go version 1.20 and I have defined multiple routes, but some of them are not being matched correctly. For instance, I have a route for `/api/v1/users/` which should handle all user-related requests, but it seems that requests to `/api/v1/users` (without the trailing slash) are not being handled as expected. Here's how I set up my routes: ```go package main import ( "fmt" "net/http" ) func usersHandler(w http.ResponseWriter, r *http.Request) { fmt.Fprintln(w, "Users Handler") } func main() { mux := http.NewServeMux() mux.HandleFunc("/api/v1/users/", usersHandler) mux.HandleFunc("/api/v1/users", usersHandler) // Attempt to handle both http.ListenAndServe(":8080", mux) } ``` I've tried explicitly defining handlers for both the trailing slash and the non-trailing slash versions of the path, but it still doesn't seem to work properly. When I send a GET request to `/api/v1/users`, I receive a 404 Not Found behavior instead of reaching the `usersHandler`. Additionally, I've explored using a third-party router like `gorilla/mux`, but I'm trying to keep the implementation simple for now. Is there a specific reason why `http.ServeMux` behaves this way, or is there something I'm missing in my route setup? Any insights or suggestions to resolve this would be greatly appreciated! The project is a microservice built with Go. Cheers for any assistance! I've been using Go for about a year now.