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How to redirect HTTP to HTTPS with a golang webserver.
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package main | |
import ( | |
"net/http" | |
"log" | |
) | |
func redirect(w http.ResponseWriter, req *http.Request) { | |
// remove/add not default ports from req.Host | |
target := "https://" + req.Host + req.URL.Path | |
if len(req.URL.RawQuery) > 0 { | |
target += "?" + req.URL.RawQuery | |
} | |
log.Printf("redirect to: %s", target) | |
http.Redirect(w, req, target, | |
// see comments below and consider the codes 308, 302, or 301 | |
http.StatusTemporaryRedirect) | |
} | |
func index(w http.ResponseWriter, req *http.Request) { | |
// all calls to unknown url paths should return 404 | |
if req.URL.Path != "/" { | |
log.Printf("404: %s", req.URL.String()) | |
http.NotFound(w, req) | |
return | |
} | |
http.ServeFile(w, req, "index.html") | |
} | |
func main() { | |
// redirect every http request to https | |
go http.ListenAndServe(":80", http.HandlerFunc(redirect)) | |
// serve index (and anything else) as https | |
mux := http.NewServeMux() | |
mux.HandleFunc("/", index) | |
http.ListenAndServeTLS(":443", "cert.pem", "key.pem", mux) | |
} |
Shouldn't you use http.StatusPermanentRedirect (308)
as the status code for redirect, not http.StatusTemporaryRedirect (307)
, because you're probably not going to create an unsecure http route in the future?
@MakotoE you are probably right. I will add a another comment
@drstearns it flops on ipv6 addresses.
This is what I came up with:
d := r.Host
if m, _ := regexp.MatchString(`:\d+$`, d); m {
d = d[:strings.LastIndexByte(d, ':')]
}
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You could also use the
url
package to construct the URL as well:targetUrl := url.URL{ Scheme: "https", Host: r.Host, Path: r.URL.Path, RawQuery: r.URL.RawQuery, }