283 lines
8.7 KiB
Go
283 lines
8.7 KiB
Go
// Copyright 2019 Frédéric Guillot. All rights reserved.
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// Use of this source code is governed by the Apache 2.0
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// license that can be found in the LICENSE file.
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package config // import "miniflux.app/config"
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import (
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"bufio"
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"bytes"
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"errors"
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"fmt"
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"io"
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"io/ioutil"
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url_parser "net/url"
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"os"
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"strconv"
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"strings"
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)
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// Parser handles configuration parsing.
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type Parser struct {
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opts *Options
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}
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// NewParser returns a new Parser.
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func NewParser() *Parser {
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return &Parser{
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opts: NewOptions(),
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}
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}
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// ParseEnvironmentVariables loads configuration values from environment variables.
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func (p *Parser) ParseEnvironmentVariables() (*Options, error) {
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err := p.parseLines(os.Environ())
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if err != nil {
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return nil, err
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}
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return p.opts, nil
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}
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// ParseFile loads configuration values from a local file.
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func (p *Parser) ParseFile(filename string) (*Options, error) {
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fp, err := os.Open(filename)
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if err != nil {
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return nil, err
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}
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defer fp.Close()
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err = p.parseLines(p.parseFileContent(fp))
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if err != nil {
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return nil, err
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}
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return p.opts, nil
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}
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func (p *Parser) parseFileContent(r io.Reader) (lines []string) {
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scanner := bufio.NewScanner(r)
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for scanner.Scan() {
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line := strings.TrimSpace(scanner.Text())
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if len(line) > 0 && !strings.HasPrefix(line, "#") && strings.Index(line, "=") > 0 {
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lines = append(lines, line)
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}
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}
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return lines
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}
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func (p *Parser) parseLines(lines []string) (err error) {
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var port string
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for _, line := range lines {
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fields := strings.SplitN(line, "=", 2)
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key := strings.TrimSpace(fields[0])
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value := strings.TrimSpace(fields[1])
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switch key {
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case "LOG_DATE_TIME":
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p.opts.logDateTime = parseBool(value, defaultLogDateTime)
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case "DEBUG":
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p.opts.debug = parseBool(value, defaultDebug)
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case "SERVER_TIMING_HEADER":
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p.opts.serverTimingHeader = parseBool(value, defaultTiming)
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case "BASE_URL":
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p.opts.baseURL, p.opts.rootURL, p.opts.basePath, err = parseBaseURL(value)
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if err != nil {
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return err
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}
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case "PORT":
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port = value
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case "LISTEN_ADDR":
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p.opts.listenAddr = parseString(value, defaultListenAddr)
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case "DATABASE_URL":
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p.opts.databaseURL = parseString(value, defaultDatabaseURL)
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case "DATABASE_URL_FILE":
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p.opts.databaseURL = readSecretFile(value, defaultDatabaseURL)
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case "DATABASE_MAX_CONNS":
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p.opts.databaseMaxConns = parseInt(value, defaultDatabaseMaxConns)
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case "DATABASE_MIN_CONNS":
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p.opts.databaseMinConns = parseInt(value, defaultDatabaseMinConns)
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case "RUN_MIGRATIONS":
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p.opts.runMigrations = parseBool(value, defaultRunMigrations)
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case "DISABLE_HSTS":
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p.opts.hsts = !parseBool(value, defaultHSTS)
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case "HTTPS":
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p.opts.HTTPS = parseBool(value, defaultHTTPS)
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case "DISABLE_SCHEDULER_SERVICE":
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p.opts.schedulerService = !parseBool(value, defaultSchedulerService)
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case "DISABLE_HTTP_SERVICE":
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p.opts.httpService = !parseBool(value, defaultHTTPService)
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case "CERT_FILE":
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p.opts.certFile = parseString(value, defaultCertFile)
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case "KEY_FILE":
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p.opts.certKeyFile = parseString(value, defaultKeyFile)
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case "CERT_DOMAIN":
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p.opts.certDomain = parseString(value, defaultCertDomain)
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case "CERT_CACHE":
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p.opts.certCache = parseString(value, defaultCertCache)
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case "CLEANUP_FREQUENCY_HOURS":
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p.opts.cleanupFrequencyHours = parseInt(value, defaultCleanupFrequencyHours)
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case "CLEANUP_ARCHIVE_READ_DAYS":
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p.opts.cleanupArchiveReadDays = parseInt(value, defaultCleanupArchiveReadDays)
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case "CLEANUP_ARCHIVE_UNREAD_DAYS":
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p.opts.cleanupArchiveUnreadDays = parseInt(value, defaultCleanupArchiveUnreadDays)
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case "CLEANUP_REMOVE_SESSIONS_DAYS":
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p.opts.cleanupRemoveSessionsDays = parseInt(value, defaultCleanupRemoveSessionsDays)
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case "WORKER_POOL_SIZE":
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p.opts.workerPoolSize = parseInt(value, defaultWorkerPoolSize)
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case "POLLING_FREQUENCY":
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p.opts.pollingFrequency = parseInt(value, defaultPollingFrequency)
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case "BATCH_SIZE":
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p.opts.batchSize = parseInt(value, defaultBatchSize)
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case "POLLING_SCHEDULER":
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p.opts.pollingScheduler = strings.ToLower(parseString(value, defaultPollingScheduler))
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case "SCHEDULER_ENTRY_FREQUENCY_MAX_INTERVAL":
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p.opts.schedulerEntryFrequencyMaxInterval = parseInt(value, defaultSchedulerEntryFrequencyMaxInterval)
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case "SCHEDULER_ENTRY_FREQUENCY_MIN_INTERVAL":
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p.opts.schedulerEntryFrequencyMinInterval = parseInt(value, defaultSchedulerEntryFrequencyMinInterval)
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case "PROXY_IMAGES":
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p.opts.proxyImages = parseString(value, defaultProxyImages)
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case "CREATE_ADMIN":
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p.opts.createAdmin = parseBool(value, defaultCreateAdmin)
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case "ADMIN_USERNAME":
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p.opts.adminUsername = parseString(value, defaultAdminUsername)
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case "ADMIN_USERNAME_FILE":
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p.opts.adminUsername = readSecretFile(value, defaultAdminUsername)
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case "ADMIN_PASSWORD":
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p.opts.adminPassword = parseString(value, defaultAdminPassword)
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case "ADMIN_PASSWORD_FILE":
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p.opts.adminPassword = readSecretFile(value, defaultAdminPassword)
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case "POCKET_CONSUMER_KEY":
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p.opts.pocketConsumerKey = parseString(value, defaultPocketConsumerKey)
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case "POCKET_CONSUMER_KEY_FILE":
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p.opts.pocketConsumerKey = readSecretFile(value, defaultPocketConsumerKey)
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case "OAUTH2_USER_CREATION":
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p.opts.oauth2UserCreationAllowed = parseBool(value, defaultOAuth2UserCreation)
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case "OAUTH2_CLIENT_ID":
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p.opts.oauth2ClientID = parseString(value, defaultOAuth2ClientID)
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case "OAUTH2_CLIENT_ID_FILE":
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p.opts.oauth2ClientID = readSecretFile(value, defaultOAuth2ClientID)
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case "OAUTH2_CLIENT_SECRET":
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p.opts.oauth2ClientSecret = parseString(value, defaultOAuth2ClientSecret)
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case "OAUTH2_CLIENT_SECRET_FILE":
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p.opts.oauth2ClientSecret = readSecretFile(value, defaultOAuth2ClientSecret)
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case "OAUTH2_REDIRECT_URL":
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p.opts.oauth2RedirectURL = parseString(value, defaultOAuth2RedirectURL)
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case "OAUTH2_OIDC_DISCOVERY_ENDPOINT":
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p.opts.oauth2OidcDiscoveryEndpoint = parseString(value, defaultOAuth2OidcDiscoveryEndpoint)
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case "OAUTH2_PROVIDER":
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p.opts.oauth2Provider = parseString(value, defaultOAuth2Provider)
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case "HTTP_CLIENT_TIMEOUT":
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p.opts.httpClientTimeout = parseInt(value, defaultHTTPClientTimeout)
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case "HTTP_CLIENT_MAX_BODY_SIZE":
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p.opts.httpClientMaxBodySize = int64(parseInt(value, defaultHTTPClientMaxBodySize) * 1024 * 1024)
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case "HTTP_CLIENT_PROXY":
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p.opts.httpClientProxy = parseString(value, defaultHTTPClientProxy)
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case "HTTP_CLIENT_USER_AGENT":
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p.opts.httpClientUserAgent = parseString(value, defaultHTTPClientUserAgent)
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case "AUTH_PROXY_HEADER":
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p.opts.authProxyHeader = parseString(value, defaultAuthProxyHeader)
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case "AUTH_PROXY_USER_CREATION":
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p.opts.authProxyUserCreation = parseBool(value, defaultAuthProxyUserCreation)
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case "MAINTENANCE_MODE":
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p.opts.maintenanceMode = parseBool(value, defaultMaintenanceMode)
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case "MAINTENANCE_MESSAGE":
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p.opts.maintenanceMessage = parseString(value, defaultMaintenanceMessage)
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case "METRICS_COLLECTOR":
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p.opts.metricsCollector = parseBool(value, defaultMetricsCollector)
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case "METRICS_REFRESH_INTERVAL":
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p.opts.metricsRefreshInterval = parseInt(value, defaultMetricsRefreshInterval)
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case "METRICS_ALLOWED_NETWORKS":
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p.opts.metricsAllowedNetworks = parseStringList(value, []string{defaultMetricsAllowedNetworks})
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}
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}
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if port != "" {
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p.opts.listenAddr = ":" + port
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}
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return nil
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}
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func parseBaseURL(value string) (string, string, string, error) {
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if value == "" {
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return defaultBaseURL, defaultRootURL, "", nil
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}
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if value[len(value)-1:] == "/" {
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value = value[:len(value)-1]
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}
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url, err := url_parser.Parse(value)
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if err != nil {
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return "", "", "", fmt.Errorf("Invalid BASE_URL: %v", err)
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}
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scheme := strings.ToLower(url.Scheme)
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if scheme != "https" && scheme != "http" {
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return "", "", "", errors.New("Invalid BASE_URL: scheme must be http or https")
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}
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basePath := url.Path
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url.Path = ""
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return value, url.String(), basePath, nil
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}
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func parseBool(value string, fallback bool) bool {
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if value == "" {
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return fallback
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}
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value = strings.ToLower(value)
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if value == "1" || value == "yes" || value == "true" || value == "on" {
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return true
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}
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return false
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}
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func parseInt(value string, fallback int) int {
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if value == "" {
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return fallback
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}
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v, err := strconv.Atoi(value)
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if err != nil {
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return fallback
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}
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return v
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}
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func parseString(value string, fallback string) string {
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if value == "" {
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return fallback
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}
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return value
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}
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func parseStringList(value string, fallback []string) []string {
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if value == "" {
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return fallback
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}
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var strList []string
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items := strings.Split(value, ",")
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for _, item := range items {
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strList = append(strList, strings.TrimSpace(item))
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}
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return strList
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}
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func readSecretFile(filename, fallback string) string {
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data, err := ioutil.ReadFile(filename)
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if err != nil {
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return fallback
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}
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value := string(bytes.TrimSpace(data))
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if value == "" {
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return fallback
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}
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return value
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}
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