Golang : Fixing Gorilla mux http.FileServer() 404 problem
I'm in the process of developing a web application to handle my landlord to tenants relationships in a better way and previously I used net/http
's mux to handle the multiplexer routing without any issue. Everything was fine and dandy until I cleared by browser's cache. Only then I noticed that my web application interface became broken with all the css
, js
and fonts
files missing. Every attempts to navigate to those files returned error 404 instead. So what's going on?
After some investigation, I found out that the problem arises after changing the multiplexer from net/http
to github.com/gorilla/mux
The trouble is caused by the way Gorilla's mux matching an URL address compared to net/http
. You will have to dig into the documentations at https://godoc.org/github.com/gorilla/mux and https://golang.org/pkg/net/http/#ServeMux to see how they worked.
Anyway, to solve this http.FileServer()
error 404 problem, all I need to do is to change the following code
From
mx.Handle("/css", http.FileServer(webFrontEnd.HTTPBox()))
To
mx.PathPrefix("/css").Handler(http.FileServer(webFrontEnd.HTTPBox()))
Why add PathPrefix()
function?
According to the documentation about PathPrefix()
function:
Note that the path provided to PathPrefix() represents a "wildcard": calling PathPrefix("/static/").Handler(...) means that the handler will be passed any request that matches "/static/*". This makes it easy to serve static files with mux:
Hope this helps and happy coding!
References :
See also : Golang : Example of custom handler for Gorilla's Path usage.
By Adam Ng
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