DefaultNotFoundHandler is a default handler for handling 404 errors.
var DefaultNotFoundHandler = http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { w.WriteHeader(http.StatusNotFound) if matchesContentTypes(r, []string{ "text/html", "application/xhtml+xml", "application/xml", }) { w.Header().Set("Content-Type", "text/html") _, _ = w.Write([]byte(`<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>404 - Route not found</title> <style>*{transition:all .6s}html{height:100%}body{font-family:sans-serif;color:#888;margin:0}#main{display:table;width:100%;height:100vh;text-align:center}.fof{display:table-cell;vertical-align:middle}.fof h1{font-size:50px;display:inline-block;padding-right:12px;margin-bottom:12px;animation:type .5s alternate infinite}@keyframes type{from{box-shadow:inset -3px 0 0 #888}to{box-shadow:inset -3px 0 0 transparent}}</style> </head> <body translate="no"> <div id="main"> <div class="fof"> <h1>Error 404</h1> <p>The requested route does not exist. Make sure you are using the right path, domain, and port.</p> </div> </div> </body> </html>`)) return } else if matchesContentTypes(r, []string{ "text/plain", }) { w.Header().Set("Content-Type", "text/plain") _, _ = w.Write([]byte(`Error 404 - The requested route does not exist. Make sure you are using the right path, domain, and port.`)) return } w.Header().Set("Content-Type", "application/json") _, _ = w.Write([]byte(`{"error": "Error 404 - The requested route does not exist. Make sure you are using the right path, domain, and port."}`)) })
func PermanentRedirect(to string) func(rw http.ResponseWriter, r *http.Request, _ httprouter.Params)
PermanentRedirect permanently redirects (302) a path to another one.