52 lines
1.5 KiB
Go
52 lines
1.5 KiB
Go
package server
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import (
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"crypto/subtle"
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"encoding/json"
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"log"
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"net/http"
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"time"
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)
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func writeJSON(w http.ResponseWriter, v any) {
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w.Header().Set("Content-Type", "application/json")
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_ = json.NewEncoder(w).Encode(v)
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}
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func requestLog(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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start := time.Now()
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next.ServeHTTP(w, r)
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log.Printf("%s %s %s", r.Method, r.URL.Path, time.Since(start).Round(time.Millisecond))
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})
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}
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func securityHeaders(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("X-Content-Type-Options", "nosniff")
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w.Header().Set("Referrer-Policy", "no-referrer")
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w.Header().Set("Content-Security-Policy", "default-src 'self'; style-src 'self' 'unsafe-inline'; form-action 'self'")
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next.ServeHTTP(w, r)
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})
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}
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func basicAuth(next http.Handler, username, password string) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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if r.URL.Path == "/healthz" {
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next.ServeHTTP(w, r)
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return
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}
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if username == "" || password == "" {
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http.Error(w, "basic auth is not configured", http.StatusServiceUnavailable)
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return
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}
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gotUser, gotPass, ok := r.BasicAuth()
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if !ok || subtle.ConstantTimeCompare([]byte(gotUser), []byte(username)) != 1 || subtle.ConstantTimeCompare([]byte(gotPass), []byte(password)) != 1 {
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w.Header().Set("WWW-Authenticate", `Basic realm="log-guardian"`)
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http.Error(w, "unauthorized", http.StatusUnauthorized)
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return
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}
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next.ServeHTTP(w, r)
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})
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}
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