Add config and initial functionality to main.
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182
cmd/wappcityuni/main.go
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182
cmd/wappcityuni/main.go
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package main
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import (
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"fmt"
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"github.com/joho/godotenv"
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"golang.captainalm.com/cityuni-webserver/conf"
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"gopkg.in/yaml.v3"
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"log"
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"net"
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"net/http"
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"os"
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"os/signal"
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"path"
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"path/filepath"
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"strings"
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"sync"
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"syscall"
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"time"
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)
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var (
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buildVersion = "develop"
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buildDate = ""
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)
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func main() {
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log.Printf("[Main] Starting up GO Package Header Server #%s (%s)\n", buildVersion, buildDate)
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y := time.Now()
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//Hold main thread till safe shutdown exit:
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wg := &sync.WaitGroup{}
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wg.Add(1)
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//Get working directory:
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cwdDir, err := os.Getwd()
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if err != nil {
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log.Println(err)
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}
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//Load environment file:
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err = godotenv.Load()
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if err != nil {
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log.Fatalln("Error loading .env file")
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}
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//Data directory processing:
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dataDir := os.Getenv("DIR_DATA")
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if dataDir == "" {
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dataDir = path.Join(cwdDir, ".data")
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}
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check(os.MkdirAll(dataDir, 0777))
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//Config file processing:
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configLocation := os.Getenv("CONFIG_FILE")
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if configLocation == "" {
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configLocation = path.Join(dataDir, "config.yml")
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} else {
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if !filepath.IsAbs(configLocation) {
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configLocation = path.Join(dataDir, configLocation)
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}
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}
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//Config loading:
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configFile, err := os.Open(configLocation)
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if err != nil {
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log.Fatalln("Failed to open config.yml")
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}
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var configYml conf.ConfigYaml
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groupsDecoder := yaml.NewDecoder(configFile)
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err = groupsDecoder.Decode(&configYml)
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if err != nil {
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log.Fatalln("Failed to parse config.yml:", err)
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}
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//Server definitions:
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var webServer *http.Server
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var fcgiListen net.Listener
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switch strings.ToLower(configYml.Listen.WebMethod) {
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case "http":
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webServer, _ = web.New(configYml, getListener(configYml, cwdDir))
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case "fcgi":
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fcgiListen = getListener(configYml, cwdDir)
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if fcgiListen == nil {
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log.Fatalln("Listener Nil")
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} else {
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//Serve FCGI
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}
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default:
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log.Fatalln("Unknown Web Method.")
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}
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//=====================
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// Safe shutdown
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sigs := make(chan os.Signal, 1)
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signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)
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//Startup complete:
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z := time.Now().Sub(y)
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log.Printf("[Main] Took '%s' to fully initialize modules\n", z.String())
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go func() {
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<-sigs
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fmt.Printf("\n")
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log.Printf("[Main] Attempting safe shutdown\n")
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a := time.Now()
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if webServer != nil {
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log.Printf("[Main] Shutting down HTTP server...\n")
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err := webServer.Close()
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if err != nil {
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log.Println(err)
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}
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}
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if fcgiListen != nil {
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log.Printf("[Main] Shutting down FCGI server...\n")
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err := fcgiListen.Close()
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if err != nil {
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log.Println(err)
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}
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}
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log.Printf("[Main] Signalling program exit...\n")
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b := time.Now().Sub(a)
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log.Printf("[Main] Took '%s' to fully shutdown modules\n", b.String())
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wg.Done()
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}()
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//
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//=====================
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wg.Wait()
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log.Println("[Main] Goodbye")
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//os.Exit(0)
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}
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func check(err error) {
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if err != nil {
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panic(err)
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}
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}
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func getListener(config conf.ConfigYaml, cwd string) net.Listener {
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split := strings.Split(strings.ToLower(config.Listen.WebNetwork), ":")
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if len(split) == 0 {
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log.Fatalln("Invalid Web Network")
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return nil
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} else {
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var theListener net.Listener
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var theError error
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log.Println("[Main] Socket Network Type:" + split[0])
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log.Printf("[Main] Starting up %s server on %s...\n", config.Listen.WebMethod, config.Listen.Web)
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switch split[0] {
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case "tcp", "tcp4", "tcp6", "udp", "udp4", "udp6", "ip", "ip4", "ip6":
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theListener, theError = net.Listen(strings.ToLower(config.Listen.WebNetwork), config.Listen.Web)
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case "unix", "unixgram", "unixpacket":
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socketPath := config.Listen.Web
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if !filepath.IsAbs(socketPath) {
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if !filepath.IsAbs(cwd) {
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log.Fatalln("Web Path Not Absolute And No Working Directory.")
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return nil
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}
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socketPath = path.Join(cwd, socketPath)
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}
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log.Println("[Main] Removing old socket.")
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if err := os.RemoveAll(socketPath); err != nil {
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log.Fatalln("Could Not Remove Old Socket.")
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return nil
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}
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theListener, theError = net.Listen(strings.ToLower(config.Listen.WebNetwork), config.Listen.Web)
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default:
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log.Fatalln("Unknown Web Network.")
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return nil
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}
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if theError != nil {
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log.Fatalln("Failed to listen due to:", theError)
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return nil
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}
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return theListener
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}
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}
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11
conf/cache.go
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11
conf/cache.go
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@ -0,0 +1,11 @@
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package conf
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type CacheSettingsYaml struct {
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EnableTemplateCaching bool `yaml:"enableTemplateCaching"`
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EnableTemplateCachePurge bool `yaml:"enableTemplateCachePurge"`
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EnableContentsCaching bool `yaml:"enableContentsCaching"`
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EnableContentsCachePurge bool `yaml:"enableContentsCachePurge"`
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MaxAge uint `yaml:"maxAge"`
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NotModifiedResponseUsingLastModified bool `yaml:"notModifiedUsingLastModified"`
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NotModifiedResponseUsingETags bool `yaml:"notModifiedUsingETags"`
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}
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6
conf/config.go
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6
conf/config.go
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package conf
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type ConfigYaml struct {
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Listen ListenYaml `yaml:"listen"`
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Serve ServeYaml `yaml:"serve"`
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}
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28
conf/listen.go
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28
conf/listen.go
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package conf
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import "time"
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type ListenYaml struct {
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Web string `yaml:"web"`
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WebMethod string `yaml:"webMethod"`
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WebNetwork string `yaml:"webNetwork"`
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ReadTimeout time.Duration `yaml:"readTimeout"`
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WriteTimeout time.Duration `yaml:"writeTimeout"`
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Identify bool `yaml:"identify"`
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}
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func (ly ListenYaml) GetReadTimeout() time.Duration {
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if ly.ReadTimeout.Seconds() < 1 {
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return 1 * time.Second
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} else {
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return ly.ReadTimeout
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}
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}
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func (ly ListenYaml) GetWriteTimeout() time.Duration {
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if ly.WriteTimeout.Seconds() < 1 {
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return 1 * time.Second
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} else {
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return ly.WriteTimeout
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}
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}
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7
conf/serve.go
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7
conf/serve.go
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package conf
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type ServeYaml struct {
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Domains []string `yaml:"domains"`
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RangeSupported bool `yaml:"rangeSupported"`
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CacheSettings CacheSettingsYaml `yaml:"cacheSettings"`
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}
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5
go.mod
5
go.mod
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module golang.captainalm.com/cityuni-webserver
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go 1.18
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require (
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github.com/joho/godotenv v1.4.0
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gopkg.in/yaml.v3 v3.0.1
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)
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6
go.sum
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6
go.sum
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github.com/joho/godotenv v1.4.0 h1:3l4+N6zfMWnkbPEXKng2o2/MR5mSwTrBih4ZEkkz1lg=
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github.com/joho/godotenv v1.4.0/go.mod h1:f4LDr5Voq0i2e/R5DDNOoa2zzDfwtkZa6DnEwAbqwq4=
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gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
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gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
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gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
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gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
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