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// Copyright 2017 Frédéric Guillot. All rights reserved.
// Use of this source code is governed by the Apache 2.0
// license that can be found in the LICENSE file.
package config
import (
"net/url"
"os"
"strconv"
"github.com/miniflux/miniflux/logger"
)
const (
defaultBaseURL = "http://localhost"
defaultDatabaseURL = "postgres://postgres:postgres@localhost/miniflux2?sslmode=disable"
defaultWorkerPoolSize = 5
defaultPollingFrequency = 60
defaultBatchSize = 10
defaultDatabaseMaxConns = 20
defaultListenAddr = "127.0.0.1:8080"
defaultCertFile = ""
defaultKeyFile = ""
defaultCertDomain = ""
defaultCertCache = "/tmp/cert_cache"
defaultSessionCleanupFrequency = 24
)
// Config manages configuration parameters.
type Config struct {
IsHTTPS bool
baseURL string
rootURL string
basePath string
}
func (c *Config) get(key, fallback string) string {
value := os.Getenv(key)
if value == "" {
return fallback
}
return value
}
func (c *Config) getInt(key string, fallback int) int {
value := os.Getenv(key)
if value == "" {
return fallback
}
v, _ := strconv.Atoi(value)
return v
}
// HasDebugMode returns true if debug mode is enabled.
func (c *Config) HasDebugMode() bool {
return c.get("DEBUG", "") != ""
}
// BaseURL returns the application base URL with path.
func (c *Config) BaseURL() string {
if c.baseURL == "" {
c.baseURL = c.get("BASE_URL", defaultBaseURL)
if c.baseURL[len(c.baseURL)-1:] == "/" {
c.baseURL = c.baseURL[:len(c.baseURL)-1]
}
}
return c.baseURL
}
// RootURL returns the base URL without path.
func (c *Config) RootURL() string {
if c.rootURL == "" {
u, _ := url.Parse(c.BaseURL())
u.Path = ""
c.rootURL = u.String()
}
return c.rootURL
}
// BasePath returns the application base path according to the base URL.
func (c *Config) BasePath() string {
if c.basePath == "" {
u, _ := url.Parse(c.BaseURL())
c.basePath = u.Path
}
return c.basePath
}
// DatabaseURL returns the database URL.
func (c *Config) DatabaseURL() string {
value, exists := os.LookupEnv("DATABASE_URL")
if !exists {
logger.Info("The environment variable DATABASE_URL is not configured (the default value is used instead)")
}
if value == "" {
value = defaultDatabaseURL
}
return value
}
// DatabaseMaxConnections returns the number of maximum database connections.
func (c *Config) DatabaseMaxConnections() int {
return c.getInt("DATABASE_MAX_CONNS", defaultDatabaseMaxConns)
}
// ListenAddr returns the listen address for the HTTP server.
func (c *Config) ListenAddr() string {
return c.get("LISTEN_ADDR", defaultListenAddr)
}
// CertFile returns the SSL certificate filename if any.
func (c *Config) CertFile() string {
return c.get("CERT_FILE", defaultCertFile)
}
// KeyFile returns the private key filename for custom SSL certificate.
func (c *Config) KeyFile() string {
return c.get("KEY_FILE", defaultKeyFile)
}
// CertDomain returns the domain to use for Let's Encrypt certificate.
func (c *Config) CertDomain() string {
return c.get("CERT_DOMAIN", defaultCertDomain)
}
// CertCache returns the directory to use for Let's Encrypt session cache.
func (c *Config) CertCache() string {
return c.get("CERT_CACHE", defaultCertCache)
}
// SessionCleanupFrequency returns the interval for session cleanup.
func (c *Config) SessionCleanupFrequency() int {
return c.getInt("SESSION_CLEANUP_FREQUENCY", defaultSessionCleanupFrequency)
}
// WorkerPoolSize returns the number of background worker.
func (c *Config) WorkerPoolSize() int {
return c.getInt("WORKER_POOL_SIZE", defaultWorkerPoolSize)
}
// PollingFrequency returns the interval to refresh feeds in the background.
func (c *Config) PollingFrequency() int {
return c.getInt("POLLING_FREQUENCY", defaultPollingFrequency)
}
// BatchSize returns the number of feeds to send for background processing.
func (c *Config) BatchSize() int {
return c.getInt("BATCH_SIZE", defaultBatchSize)
}
// IsOAuth2UserCreationAllowed returns true if user creation is allowed for OAuth2 users.
func (c *Config) IsOAuth2UserCreationAllowed() bool {
return c.getInt("OAUTH2_USER_CREATION", 0) == 1
}
// OAuth2ClientID returns the OAuth2 Client ID.
func (c *Config) OAuth2ClientID() string {
return c.get("OAUTH2_CLIENT_ID", "")
}
// OAuth2ClientSecret returns the OAuth2 client secret.
func (c *Config) OAuth2ClientSecret() string {
return c.get("OAUTH2_CLIENT_SECRET", "")
}
// OAuth2RedirectURL returns the OAuth2 redirect URL.
func (c *Config) OAuth2RedirectURL() string {
return c.get("OAUTH2_REDIRECT_URL", "")
}
// OAuth2Provider returns the name of the OAuth2 provider configured.
func (c *Config) OAuth2Provider() string {
return c.get("OAUTH2_PROVIDER", "")
}
// HasHSTS returns true if HTTP Strict Transport Security is enabled.
func (c *Config) HasHSTS() bool {
return c.get("DISABLE_HSTS", "") == ""
}
// NewConfig returns a new Config.
func NewConfig() *Config {
return &Config{IsHTTPS: os.Getenv("HTTPS") != ""}
}
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