feat: настраиваемые каналы уведомлений (telegram/pachca/email) с маршрутизацией по пути

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

handler.go

@@ -0,0 +1,32 @@
+package main
+
+import (
+	"log"
+	"net/http"
+	"strings"
+)
+
+// makeHandler возвращает http-хендлер, маршрутизирующий по первому сегменту пути.
+func makeHandler(notifiers map[string]Notifier) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		paths := strings.Split(r.URL.Path, "/")
+		if len(paths) < 2 || paths[1] == "" {
+			w.WriteHeader(http.StatusNotFound)
+			return
+		}
+		n, ok := notifiers[paths[1]]
+		if !ok {
+			w.WriteHeader(http.StatusNotFound)
+			return
+		}
+		data := ExtractRequest(r)
+		if err := n.Send(data); err != nil {
+			log.Println(err)
+			w.WriteHeader(http.StatusBadGateway)
+			_, _ = w.Write([]byte(err.Error()))
+			return
+		}
+		w.WriteHeader(http.StatusOK)
+		_, _ = w.Write([]byte("OK"))
+	}
+}

main.go

@@ -1,117 +1,30 @@
 package main
 
 import (
-	"fmt"
-	"io"
 	"log"
-	"net"
 	"net/http"
-	"strings"
-	"time"
-
-	"gitea.mediatoday.ru/mt/notify"
 )
 
-func GetRemoteAddr(r *http.Request) string {
-	// Сначала смотрим X-Forwarded-For
-	if xff := r.Header.Get("X-Forwarded-For"); xff != "" {
-		// X-Forwarded-For может содержать несколько IP через запятую
-		ips := strings.Split(xff, ",")
-		if len(ips) > 0 {
-			return strings.TrimSpace(ips[0])
-		}
-	}
-
-	// Потом X-Real-IP
-	if realIP := r.Header.Get("X-Real-IP"); realIP != "" {
-		return realIP
-	}
-
-	// И в конце RemoteAddr
-	host, _, err := net.SplitHostPort(r.RemoteAddr)
-	if err != nil {
-		return r.RemoteAddr
-	}
-	return host
-}
-
-func BuildMessage(r *http.Request) string {
-	t := time.Now()
-
-	var body []byte
-
-	if r.ContentLength > 1024 {
-		body = []byte("too long")
-	} else {
-		// Читаем тело запроса
-		body, _ = io.ReadAll(r.Body)
-		_ = r.Body.Close()
-	}
-
-	// Формируем содержимое
-	entry := fmt.Sprintf("[%s] %s %s%s\n", t.Format(time.RFC3339), r.Method, r.Host, r.URL.String())
-	entry += "RemoteAddr: " + GetRemoteAddr(r) + "\n"
-	entry += "Headers:\n"
-	for name, values := range r.Header {
-		for _, v := range values {
-			entry += fmt.Sprintf("  %s: %s\n", name, v)
-		}
-	}
-	entry += fmt.Sprintf("Body:\n%s\n", string(body))
-	entry += "----\n"
-
-	entry = "```" + entry + "```"
-	return entry
-}
-
 func main() {
 	log.Println("Запуск приложения")
-	// Загружаем конфиг
+
 	cfg, err := loadConfig("config.yaml")
 	if err != nil {
 		log.Fatalf("Ошибка загрузки конфига: %v", err)
 	}
 
-	if cfg.Telegram == nil {
+	notifiers, err := BuildNotifiers(cfg)
-		log.Fatalf("не указана секция telegram")
-	}
-
-	tg, err := notify.NewTelegram(cfg.Telegram.Token, true)
 	if err != nil {
-		log.Fatal(err)
+		log.Fatalf("Ошибка инициализации каналов: %v", err)
+	}
+	if len(notifiers) == 0 {
+		log.Fatal("не сконфигурирован ни один канал уведомлений")
 	}
 
-	// Общий обработчик
+	http.HandleFunc("/", makeHandler(notifiers))
-	handler := func(w http.ResponseWriter, r *http.Request) {
-		paths := strings.Split(r.URL.Path, "/")
-		switch {
-		case len(paths) < 2:
-			w.WriteHeader(http.StatusNotFound)
-			return
-		case paths[1] == "telegram":
-		default:
-			w.WriteHeader(http.StatusNotFound)
-			return
-		}
 
-		entry := BuildMessage(r)
-		_, err = tg.SendTextMessage(cfg.Telegram.GroupID, entry)
-		if err != nil {
-			log.Println(err)
-			w.WriteHeader(http.StatusBadGateway)
-			w.Write([]byte(err.Error()))
-		} else {
-			w.WriteHeader(http.StatusOK)
-			_, _ = w.Write([]byte("OK"))
-		}
-	}
-
-	// Регистрируем хендлер
-	http.HandleFunc("/", handler)
-
-	// Запускаем серверы для всех адресов
 	for _, addr := range cfg.ListenAddresses {
-		addr := addr // захватываем в область видимости
+		addr := addr
 		go func() {
 			log.Printf("Слушаю %s ...", addr)
 			if err := http.ListenAndServe(addr, nil); err != nil {
@@ -120,6 +33,5 @@ func main() {
 		}()
 	}
 
-	// Блокируем main, чтобы программа не завершилась
 	select {}
 }

notifier.go

@@ -0,0 +1,165 @@
+package main
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"html"
+	"io"
+	"net"
+	"net/http"
+	"net/mail"
+	"net/smtp"
+	"strings"
+	"time"
+
+	"gitea.mediatoday.ru/mt/notify"
+)
+
+// Notifier — канал отправки уведомлений
+type Notifier interface {
+	Send(data RequestData) error
+}
+
+// formatPlain собирает текстовое тело без обёртки.
+func formatPlain(d RequestData) string {
+	var b strings.Builder
+	fmt.Fprintf(&b, "[%s] %s %s%s\n", d.Time.Format("2006-01-02T15:04:05Z07:00"), d.Method, d.Host, d.URL)
+	fmt.Fprintf(&b, "RemoteAddr: %s\n", d.RemoteAddr)
+	b.WriteString("Headers:\n")
+	for name, values := range d.Header {
+		for _, v := range values {
+			fmt.Fprintf(&b, "  %s: %s\n", name, v)
+		}
+	}
+	fmt.Fprintf(&b, "Body:\n%s\n", d.Body)
+	b.WriteString("----\n")
+	return b.String()
+}
+
+// formatMarkdown — обёртка в код-блок для Telegram/Pachca.
+func formatMarkdown(d RequestData) string {
+	return "```" + formatPlain(d) + "```"
+}
+
+// formatHTML — обёртка в <pre> с экранированием для Email.
+func formatHTML(d RequestData) string {
+	return "<pre>" + html.EscapeString(formatPlain(d)) + "</pre>"
+}
+
+// --- Telegram ---
+
+type telegramNotifier struct {
+	bot    *notify.Bot
+	chatID int64
+}
+
+func (t *telegramNotifier) Send(d RequestData) error {
+	_, err := t.bot.SendTextMessage(t.chatID, formatMarkdown(d))
+	return err
+}
+
+// --- Pachca (входящий вебхук) ---
+
+type pachcaNotifier struct {
+	webhookURL string
+	client     *http.Client
+}
+
+func (p *pachcaNotifier) Send(d RequestData) error {
+	payload, err := json.Marshal(map[string]string{"message": formatMarkdown(d)})
+	if err != nil {
+		return err
+	}
+	resp, err := p.client.Post(p.webhookURL, "application/json", bytes.NewReader(payload))
+	if err != nil {
+		return err
+	}
+	defer resp.Body.Close()
+	if resp.StatusCode < 200 || resp.StatusCode >= 300 {
+		body, _ := io.ReadAll(resp.Body)
+		return fmt.Errorf("pachca webhook: HTTP %d: %s", resp.StatusCode, string(body))
+	}
+	return nil
+}
+
+// --- Email ---
+
+type emailNotifier struct {
+	auth    notify.SmtpAuth
+	from    mail.Address
+	to      []mail.Address
+	subject string
+}
+
+func (e *emailNotifier) Send(d RequestData) error {
+	return notify.SendEmailHTML(e.auth, formatHTML(d), e.subject, e.from, e.to...)
+}
+
+func splitHostPortLenient(addr string) (host, port string, err error) {
+	return net.SplitHostPort(addr)
+}
+
+// BuildNotifiers собирает map каналов из конфига. Добавляет только заданные секции.
+func BuildNotifiers(cfg *Config) (map[string]Notifier, error) {
+	notifiers := map[string]Notifier{}
+
+	if cfg.Telegram != nil {
+		disableIPV6 := true
+		if cfg.Telegram.DisableIPV6 != nil {
+			disableIPV6 = *cfg.Telegram.DisableIPV6
+		}
+		bot, err := notify.NewTelegram(cfg.Telegram.Token, disableIPV6)
+		if err != nil {
+			return nil, fmt.Errorf("telegram: %w", err)
+		}
+		notifiers["telegram"] = &telegramNotifier{bot: bot, chatID: cfg.Telegram.GroupID}
+	}
+
+	if cfg.Pachca != nil {
+		if cfg.Pachca.WebhookURL == "" {
+			return nil, fmt.Errorf("pachca: не задан webhook_url")
+		}
+		notifiers["pachca"] = &pachcaNotifier{
+			webhookURL: cfg.Pachca.WebhookURL,
+			client:     &http.Client{Timeout: 30 * time.Second},
+		}
+	}
+
+	if cfg.Email != nil {
+		host, _, err := splitHostPortLenient(cfg.Email.SMTPAddr)
+		if err != nil {
+			return nil, fmt.Errorf("email smtp_addr: %w", err)
+		}
+		from, err := mail.ParseAddress(cfg.Email.From)
+		if err != nil {
+			return nil, fmt.Errorf("email from: %w", err)
+		}
+		var to []mail.Address
+		for _, addr := range cfg.Email.To {
+			a, err := mail.ParseAddress(addr)
+			if err != nil {
+				return nil, fmt.Errorf("email to %q: %w", addr, err)
+			}
+			to = append(to, *a)
+		}
+		if len(to) == 0 {
+			return nil, fmt.Errorf("email: не задан ни один получатель (to)")
+		}
+		subject := cfg.Email.Subject
+		if subject == "" {
+			subject = "HTTP Logger"
+		}
+		notifiers["email"] = &emailNotifier{
+			auth: notify.SmtpAuth{
+				Addr: cfg.Email.SMTPAddr,
+				Auth: smtp.PlainAuth("", cfg.Email.Username, cfg.Email.Password, host),
+			},
+			from:    *from,
+			to:      to,
+			subject: subject,
+		}
+	}
+
+	return notifiers, nil
+}

notifier_test.go

@@ -0,0 +1,93 @@
+package main
+
+import (
+	"errors"
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"testing"
+	"time"
+)
+
+var errSend = errors.New("send failed")
+
+func sampleData() RequestData {
+	return RequestData{
+		Time:       time.Date(2026, 6, 14, 10, 0, 0, 0, time.UTC),
+		Method:     "POST",
+		Host:       "example.com",
+		URL:        "/telegram",
+		RemoteAddr: "1.2.3.4",
+		Header:     http.Header{"X-Test": []string{"v"}},
+		Body:       "payload<>",
+	}
+}
+
+func TestFormatMarkdown(t *testing.T) {
+	out := formatMarkdown(sampleData())
+	if !strings.HasPrefix(out, "```") || !strings.HasSuffix(out, "```") {
+		t.Fatalf("expected ``` wrapping, got: %q", out)
+	}
+	if !strings.Contains(out, "POST") || !strings.Contains(out, "1.2.3.4") {
+		t.Errorf("missing fields: %q", out)
+	}
+	if !strings.Contains(out, "X-Test: v") {
+		t.Errorf("missing header: %q", out)
+	}
+}
+
+func TestFormatHTML(t *testing.T) {
+	out := formatHTML(sampleData())
+	if !strings.Contains(out, "<pre>") || !strings.Contains(out, "</pre>") {
+		t.Fatalf("expected <pre> wrapping, got: %q", out)
+	}
+	if !strings.Contains(out, "payload&lt;&gt;") {
+		t.Errorf("body not escaped: %q", out)
+	}
+	if strings.Contains(out, "payload<>") {
+		t.Errorf("unescaped body present: %q", out)
+	}
+}
+
+type mockNotifier struct {
+	called bool
+	err    error
+}
+
+func (m *mockNotifier) Send(d RequestData) error {
+	m.called = true
+	return m.err
+}
+
+func TestHandlerRouting(t *testing.T) {
+	tg := &mockNotifier{}
+	h := makeHandler(map[string]Notifier{"telegram": tg})
+
+	rec := httptest.NewRecorder()
+	h(rec, httptest.NewRequest("POST", "/telegram", strings.NewReader("x")))
+	if rec.Code != 200 || !tg.called {
+		t.Fatalf("telegram: code=%d called=%v", rec.Code, tg.called)
+	}
+
+	rec = httptest.NewRecorder()
+	h(rec, httptest.NewRequest("POST", "/unknown", strings.NewReader("x")))
+	if rec.Code != 404 {
+		t.Fatalf("unknown: code=%d", rec.Code)
+	}
+
+	rec = httptest.NewRecorder()
+	h(rec, httptest.NewRequest("POST", "/", nil))
+	if rec.Code != 404 {
+		t.Fatalf("empty: code=%d", rec.Code)
+	}
+}
+
+func TestHandlerSendError(t *testing.T) {
+	failing := &mockNotifier{err: errSend}
+	h := makeHandler(map[string]Notifier{"telegram": failing})
+	rec := httptest.NewRecorder()
+	h(rec, httptest.NewRequest("POST", "/telegram", strings.NewReader("x")))
+	if rec.Code != 502 {
+		t.Fatalf("expected 502, got %d", rec.Code)
+	}
+}

request.go

@@ -0,0 +1,57 @@
+package main
+
+import (
+	"io"
+	"net"
+	"net/http"
+	"strings"
+	"time"
+)
+
+// RequestData — извлечённые данные входящего запроса
+type RequestData struct {
+	Time       time.Time
+	Method     string
+	Host       string
+	URL        string
+	RemoteAddr string
+	Header     http.Header
+	Body       string
+}
+
+func GetRemoteAddr(r *http.Request) string {
+	if xff := r.Header.Get("X-Forwarded-For"); xff != "" {
+		ips := strings.Split(xff, ",")
+		if len(ips) > 0 {
+			return strings.TrimSpace(ips[0])
+		}
+	}
+	if realIP := r.Header.Get("X-Real-IP"); realIP != "" {
+		return realIP
+	}
+	host, _, err := net.SplitHostPort(r.RemoteAddr)
+	if err != nil {
+		return r.RemoteAddr
+	}
+	return host
+}
+
+// ExtractRequest читает запрос один раз и возвращает нейтральные данные.
+func ExtractRequest(r *http.Request) RequestData {
+	var body []byte
+	if r.ContentLength > 1024 {
+		body = []byte("too long")
+	} else {
+		body, _ = io.ReadAll(r.Body)
+		_ = r.Body.Close()
+	}
+	return RequestData{
+		Time:       time.Now(),
+		Method:     r.Method,
+		Host:       r.Host,
+		URL:        r.URL.RequestURI(),
+		RemoteAddr: GetRemoteAddr(r),
+		Header:     r.Header,
+		Body:       string(body),
+	}
+}

request_test.go

@@ -0,0 +1,58 @@
+package main
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"testing"
+)
+
+func TestGetRemoteAddr(t *testing.T) {
+	tests := []struct {
+		name string
+		set  func(r *http.Request)
+		want string
+	}{
+		{"xff", func(r *http.Request) { r.Header.Set("X-Forwarded-For", "1.1.1.1, 2.2.2.2") }, "1.1.1.1"},
+		{"realip", func(r *http.Request) { r.Header.Set("X-Real-IP", "3.3.3.3") }, "3.3.3.3"},
+		{"remoteaddr", func(r *http.Request) { r.RemoteAddr = "4.4.4.4:5678" }, "4.4.4.4"},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			r := httptest.NewRequest("GET", "/telegram", nil)
+			r.RemoteAddr = ""
+			tt.set(r)
+			if got := GetRemoteAddr(r); got != tt.want {
+				t.Fatalf("got %q want %q", got, tt.want)
+			}
+		})
+	}
+}
+
+func TestExtractRequest(t *testing.T) {
+	r := httptest.NewRequest("POST", "http://example.com/telegram?x=1", strings.NewReader("hello"))
+	r.Header.Set("X-Real-IP", "9.9.9.9")
+	data := ExtractRequest(r)
+	if data.Method != "POST" {
+		t.Errorf("method = %q", data.Method)
+	}
+	if data.RemoteAddr != "9.9.9.9" {
+		t.Errorf("remoteaddr = %q", data.RemoteAddr)
+	}
+	if data.Body != "hello" {
+		t.Errorf("body = %q", data.Body)
+	}
+	if data.URL != "/telegram?x=1" {
+		t.Errorf("url = %q", data.URL)
+	}
+}
+
+func TestExtractRequestBodyLimit(t *testing.T) {
+	big := strings.Repeat("a", 2000)
+	r := httptest.NewRequest("POST", "/telegram", strings.NewReader(big))
+	r.ContentLength = int64(len(big))
+	data := ExtractRequest(r)
+	if data.Body != "too long" {
+		t.Errorf("expected 'too long', got len %d", len(data.Body))
+	}
+}