feat(email): 初始化自建邮箱 MVP

- 新增 Go + SQLite 后端，支持登录、域名、邮箱、别名、联系人、规则、统计与邮件收发。 - 新增 Webmail 前端，支持多邮箱切换、邮件列表/阅读/写信、附件、搜索、主题切换与个人中心。 - 新增 Docker Compose 部署骨架，补充 Postfix、Dovecot、OpenDKIM、Nginx 配置与部署说明。
2026-06-14 01:07:48 +08:00
commit 3ef8caa319
85 changed files with 13649 additions and 0 deletions
@@ -0,0 +1,79 @@
+package app
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+type Config struct {
+	Addr               string
+	DBPath             string
+	DataDir            string
+	CookieName         string
+	SessionTTLHours    int
+	AdminEmail         string
+	AdminPassword      string
+	PublicHostname     string
+	PublicBaseURL      string
+	SMTPHost           string
+	SMTPPort           string
+	SMTPUsername       string
+	SMTPPassword       string
+	SMTPRequireTLS     bool
+	MaildirRoot        string
+	MaildirScanSeconds int
+	AllowInsecureHTTP  bool
+}
+
+func LoadConfig() Config {
+	dataDir := getenv("LANQIN_DATA_DIR", "./data")
+	return Config{
+		Addr:               getenv("LANQIN_ADDR", ":8080"),
+		DBPath:             getenv("LANQIN_DB_PATH", filepath.Join(dataDir, "lanqin.db")),
+		DataDir:            dataDir,
+		CookieName:         getenv("LANQIN_COOKIE_NAME", "lanqin_session"),
+		SessionTTLHours:    getenvInt("LANQIN_SESSION_TTL_HOURS", 24*7),
+		AdminEmail:         strings.ToLower(getenv("LANQIN_ADMIN_EMAIL", "admin@lanqin.local")),
+		AdminPassword:      getenv("LANQIN_ADMIN_PASSWORD", "ChangeMe123!"),
+		PublicHostname:     getenv("LANQIN_PUBLIC_HOSTNAME", "mail.lanqin.local"),
+		PublicBaseURL:      getenv("LANQIN_PUBLIC_BASE_URL", "http://localhost:5173"),
+		SMTPHost:           getenv("LANQIN_SMTP_HOST", ""),
+		SMTPPort:           getenv("LANQIN_SMTP_PORT", "25"),
+		SMTPUsername:       getenv("LANQIN_SMTP_USERNAME", ""),
+		SMTPPassword:       getenv("LANQIN_SMTP_PASSWORD", ""),
+		SMTPRequireTLS:     getenvBool("LANQIN_SMTP_REQUIRE_TLS", false),
+		MaildirRoot:        getenv("LANQIN_MAILDIR_ROOT", ""),
+		MaildirScanSeconds: getenvInt("LANQIN_MAILDIR_SCAN_SECONDS", 30),
+		AllowInsecureHTTP:  getenvBool("LANQIN_ALLOW_INSECURE_HTTP", true),
+	}
+}
+
+func getenv(key, fallback string) string {
+	if v := strings.TrimSpace(os.Getenv(key)); v != "" {
+		return v
+	}
+	return fallback
+}
+
+func getenvBool(key string, fallback bool) bool {
+	v := strings.ToLower(strings.TrimSpace(os.Getenv(key)))
+	if v == "" {
+		return fallback
+	}
+	return v == "1" || v == "true" || v == "yes" || v == "on"
+}
+
+func getenvInt(key string, fallback int) int {
+	v := strings.TrimSpace(os.Getenv(key))
+	if v == "" {
+		return fallback
+	}
+	var n int
+	_, err := fmt.Sscanf(v, "%d", &n)
+	if err != nil || n <= 0 {
+		return fallback
+	}
+	return n
+}