AdGuardHome/home/control.go

302 lines
8.4 KiB
Go

package home
import (
"encoding/json"
"fmt"
"net"
"net/http"
"net/url"
"strconv"
"strings"
"github.com/AdguardTeam/AdGuardHome/util"
"github.com/AdguardTeam/AdGuardHome/dnsforward"
"github.com/AdguardTeam/golibs/log"
"github.com/NYTimes/gziphandler"
)
// ----------------
// helper functions
// ----------------
func returnOK(w http.ResponseWriter) {
_, err := fmt.Fprintf(w, "OK\n")
if err != nil {
httpError(w, http.StatusInternalServerError, "Couldn't write body: %s", err)
}
}
func httpOK(r *http.Request, w http.ResponseWriter) {
}
func httpError(w http.ResponseWriter, code int, format string, args ...interface{}) {
text := fmt.Sprintf(format, args...)
log.Info(text)
http.Error(w, text, code)
}
// ---------------
// dns run control
// ---------------
func writeAllConfigsAndReloadDNS() error {
err := writeAllConfigs()
if err != nil {
log.Error("Couldn't write all configs: %s", err)
return err
}
return reconfigureDNSServer()
}
func addDNSAddress(dnsAddresses *[]string, addr string) {
if config.DNS.Port != 53 {
addr = fmt.Sprintf("%s:%d", addr, config.DNS.Port)
}
*dnsAddresses = append(*dnsAddresses, addr)
}
// Get the list of DNS addresses the server is listening on
func getDNSAddresses() []string {
dnsAddresses := []string{}
if config.DNS.BindHost == "0.0.0.0" {
ifaces, e := util.GetValidNetInterfacesForWeb()
if e != nil {
log.Error("Couldn't get network interfaces: %v", e)
return []string{}
}
for _, iface := range ifaces {
for _, addr := range iface.Addresses {
addDNSAddress(&dnsAddresses, addr)
}
}
} else {
addDNSAddress(&dnsAddresses, config.DNS.BindHost)
}
if config.TLS.Enabled && len(config.TLS.ServerName) != 0 {
if config.TLS.PortHTTPS != 0 {
addr := config.TLS.ServerName
if config.TLS.PortHTTPS != 443 {
addr = fmt.Sprintf("%s:%d", addr, config.TLS.PortHTTPS)
}
addr = fmt.Sprintf("https://%s/dns-query", addr)
dnsAddresses = append(dnsAddresses, addr)
}
if config.TLS.PortDNSOverTLS != 0 {
addr := fmt.Sprintf("tls://%s:%d", config.TLS.ServerName, config.TLS.PortDNSOverTLS)
dnsAddresses = append(dnsAddresses, addr)
}
}
return dnsAddresses
}
func handleStatus(w http.ResponseWriter, r *http.Request) {
c := dnsforward.FilteringConfig{}
if Context.dnsServer != nil {
Context.dnsServer.WriteDiskConfig(&c)
}
data := map[string]interface{}{
"dns_addresses": getDNSAddresses(),
"http_port": config.BindPort,
"dns_port": config.DNS.Port,
"running": isRunning(),
"version": versionString,
"language": config.Language,
"protection_enabled": c.ProtectionEnabled,
"bootstrap_dns": c.BootstrapDNS,
"upstream_dns": c.UpstreamDNS,
"all_servers": c.AllServers,
}
jsonVal, err := json.Marshal(data)
if err != nil {
httpError(w, http.StatusInternalServerError, "Unable to marshal status json: %s", err)
return
}
w.Header().Set("Content-Type", "application/json")
_, err = w.Write(jsonVal)
if err != nil {
httpError(w, http.StatusInternalServerError, "Unable to write response json: %s", err)
return
}
}
type profileJSON struct {
Name string `json:"name"`
}
func handleGetProfile(w http.ResponseWriter, r *http.Request) {
pj := profileJSON{}
u := Context.auth.GetCurrentUser(r)
pj.Name = u.Name
data, err := json.Marshal(pj)
if err != nil {
httpError(w, http.StatusInternalServerError, "json.Marshal: %s", err)
return
}
_, _ = w.Write(data)
}
// --------------
// DNS-over-HTTPS
// --------------
func handleDOH(w http.ResponseWriter, r *http.Request) {
if !config.TLS.AllowUnencryptedDOH && r.TLS == nil {
httpError(w, http.StatusNotFound, "Not Found")
return
}
if !isRunning() {
httpError(w, http.StatusInternalServerError, "DNS server is not running")
return
}
Context.dnsServer.ServeHTTP(w, r)
}
// ------------------------
// registration of handlers
// ------------------------
func registerControlHandlers() {
httpRegister(http.MethodGet, "/control/status", handleStatus)
httpRegister(http.MethodPost, "/control/i18n/change_language", handleI18nChangeLanguage)
httpRegister(http.MethodGet, "/control/i18n/current_language", handleI18nCurrentLanguage)
http.HandleFunc("/control/version.json", postInstall(optionalAuth(handleGetVersionJSON)))
httpRegister(http.MethodPost, "/control/update", handleUpdate)
httpRegister("GET", "/control/profile", handleGetProfile)
RegisterFilteringHandlers()
RegisterTLSHandlers()
RegisterBlockedServicesHandlers()
RegisterAuthHandlers()
http.HandleFunc("/dns-query", postInstall(handleDOH))
}
func httpRegister(method string, url string, handler func(http.ResponseWriter, *http.Request)) {
http.Handle(url, postInstallHandler(optionalAuthHandler(gziphandler.GzipHandler(ensureHandler(method, handler)))))
}
// ----------------------------------
// helper functions for HTTP handlers
// ----------------------------------
func ensure(method string, handler func(http.ResponseWriter, *http.Request)) func(http.ResponseWriter, *http.Request) {
return func(w http.ResponseWriter, r *http.Request) {
log.Debug("%s %v", r.Method, r.URL)
if r.Method != method {
http.Error(w, "This request must be "+method, http.StatusMethodNotAllowed)
return
}
if method == "POST" || method == "PUT" || method == "DELETE" {
Context.controlLock.Lock()
defer Context.controlLock.Unlock()
}
handler(w, r)
}
}
func ensurePOST(handler func(http.ResponseWriter, *http.Request)) func(http.ResponseWriter, *http.Request) {
return ensure("POST", handler)
}
func ensureGET(handler func(http.ResponseWriter, *http.Request)) func(http.ResponseWriter, *http.Request) {
return ensure("GET", handler)
}
// Bridge between http.Handler object and Go function
type httpHandler struct {
handler func(http.ResponseWriter, *http.Request)
}
func (h *httpHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
h.handler(w, r)
}
func ensureHandler(method string, handler func(http.ResponseWriter, *http.Request)) http.Handler {
h := httpHandler{}
h.handler = ensure(method, handler)
return &h
}
// preInstall lets the handler run only if firstRun is true, no redirects
func preInstall(handler func(http.ResponseWriter, *http.Request)) func(http.ResponseWriter, *http.Request) {
return func(w http.ResponseWriter, r *http.Request) {
if !Context.firstRun {
// if it's not first run, don't let users access it (for example /install.html when configuration is done)
http.Error(w, http.StatusText(http.StatusForbidden), http.StatusForbidden)
return
}
handler(w, r)
}
}
// preInstallStruct wraps preInstall into a struct that can be returned as an interface where necessary
type preInstallHandlerStruct struct {
handler http.Handler
}
func (p *preInstallHandlerStruct) ServeHTTP(w http.ResponseWriter, r *http.Request) {
preInstall(p.handler.ServeHTTP)(w, r)
}
// preInstallHandler returns http.Handler interface for preInstall wrapper
func preInstallHandler(handler http.Handler) http.Handler {
return &preInstallHandlerStruct{handler}
}
// postInstall lets the handler run only if firstRun is false, and redirects to /install.html otherwise
// it also enforces HTTPS if it is enabled and configured
func postInstall(handler func(http.ResponseWriter, *http.Request)) func(http.ResponseWriter, *http.Request) {
return func(w http.ResponseWriter, r *http.Request) {
if Context.firstRun &&
!strings.HasPrefix(r.URL.Path, "/install.") &&
r.URL.Path != "/favicon.png" {
http.Redirect(w, r, "/install.html", http.StatusSeeOther) // should not be cacheable
return
}
// enforce https?
if config.TLS.ForceHTTPS && r.TLS == nil && config.TLS.Enabled && config.TLS.PortHTTPS != 0 && Context.httpsServer.server != nil {
// yes, and we want host from host:port
host, _, err := net.SplitHostPort(r.Host)
if err != nil {
// no port in host
host = r.Host
}
// construct new URL to redirect to
newURL := url.URL{
Scheme: "https",
Host: net.JoinHostPort(host, strconv.Itoa(config.TLS.PortHTTPS)),
Path: r.URL.Path,
RawQuery: r.URL.RawQuery,
}
http.Redirect(w, r, newURL.String(), http.StatusTemporaryRedirect)
return
}
w.Header().Set("Access-Control-Allow-Origin", "*")
handler(w, r)
}
}
type postInstallHandlerStruct struct {
handler http.Handler
}
func (p *postInstallHandlerStruct) ServeHTTP(w http.ResponseWriter, r *http.Request) {
postInstall(p.handler.ServeHTTP)(w, r)
}
func postInstallHandler(handler http.Handler) http.Handler {
return &postInstallHandlerStruct{handler}
}