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wakapi/main.go

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package main
import (
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"crypto/md5"
"encoding/hex"
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"fmt"
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"log"
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"net/http"
"os"
"strconv"
"time"
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"github.com/codegangsta/negroni"
"github.com/gorilla/mux"
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"github.com/jinzhu/gorm"
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"github.com/joho/godotenv"
"github.com/rs/cors"
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uuid "github.com/satori/go.uuid"
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ini "gopkg.in/ini.v1"
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"github.com/n1try/wakapi/middlewares"
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"github.com/n1try/wakapi/models"
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"github.com/n1try/wakapi/routes"
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"github.com/n1try/wakapi/services"
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"github.com/n1try/wakapi/utils"
_ "github.com/jinzhu/gorm/dialects/mysql"
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)
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func readConfig() *models.Config {
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if err := godotenv.Load(); err != nil {
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log.Fatal(err)
}
dbUser, valid := os.LookupEnv("WAKAPI_DB_USER")
dbPassword, valid := os.LookupEnv("WAKAPI_DB_PASSWORD")
dbHost, valid := os.LookupEnv("WAKAPI_DB_HOST")
dbName, valid := os.LookupEnv("WAKAPI_DB_NAME")
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if !valid {
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log.Fatal("Environment variables missing.")
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}
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cfg, err := ini.Load("config.ini")
if err != nil {
log.Fatal(fmt.Sprintf("Fail to read file: %v", err))
}
addr := cfg.Section("server").Key("listen").MustString("127.0.0.1")
port, err := strconv.Atoi(os.Getenv("PORT"))
if err != nil {
port = cfg.Section("server").Key("port").MustInt()
}
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// Read custom languages
customLangs := make(map[string]string)
languageKeys := cfg.Section("languages").Keys()
for _, k := range languageKeys {
customLangs[k.Name()] = k.MustString("unknown")
}
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return &models.Config{
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Port: port,
Addr: addr,
DbHost: dbHost,
DbUser: dbUser,
DbPassword: dbPassword,
DbName: dbName,
DbDialect: "mysql",
CustomLanguages: customLangs,
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}
}
func main() {
// Read Config
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config := readConfig()
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// Connect to database
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db, err := gorm.Open(config.DbDialect, utils.MakeConnectionString(config))
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db.LogMode(false)
db.DB().SetMaxIdleConns(1)
db.DB().SetMaxOpenConns(10)
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if err != nil {
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// log.Fatal("Could not connect to database.")
log.Fatal(err)
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}
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defer db.Close()
// Migrate database schema
db.AutoMigrate(&models.User{})
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db.AutoMigrate(&models.Alias{})
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db.AutoMigrate(&models.Heartbeat{}).AddForeignKey("user_id", "users(id)", "RESTRICT", "RESTRICT")
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// Custom migrations and initial data
addDefaultUser(db, config)
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migrateLanguages(db, config)
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// Services
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aliasSrvc := &services.AliasService{config, db}
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heartbeatSrvc := &services.HeartbeatService{config, db}
userSrvc := &services.UserService{config, db}
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summarySrvc := &services.SummaryService{config, db, heartbeatSrvc, aliasSrvc}
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// Handlers
heartbeatHandler := &routes.HeartbeatHandler{HeartbeatSrvc: heartbeatSrvc}
summaryHandler := &routes.SummaryHandler{SummarySrvc: summarySrvc}
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// Middlewares
authenticate := &middlewares.AuthenticateMiddleware{UserSrvc: userSrvc}
cors := cors.New(cors.Options{
AllowedOrigins: []string{"*"},
AllowedHeaders: []string{"*"},
Debug: false,
})
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// Setup Routing
router := mux.NewRouter()
apiRouter := mux.NewRouter().PathPrefix("/api").Subrouter()
// API Routes
heartbeats := apiRouter.Path("/heartbeat").Subrouter()
heartbeats.Methods(http.MethodPost).HandlerFunc(heartbeatHandler.Post)
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aggreagations := apiRouter.Path("/summary").Subrouter()
aggreagations.Methods(http.MethodGet).HandlerFunc(summaryHandler.Get)
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// Sub-Routes Setup
router.PathPrefix("/api").Handler(negroni.Classic().
With(cors).
With(
negroni.HandlerFunc(authenticate.Handle),
negroni.Wrap(apiRouter),
))
router.PathPrefix("/").Handler(negroni.Classic().With(negroni.Wrap(http.FileServer(http.Dir("./static")))))
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// Listen HTTP
portString := config.Addr + ":" + strconv.Itoa(config.Port)
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s := &http.Server{
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Handler: router,
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Addr: portString,
ReadTimeout: 10 * time.Second,
WriteTimeout: 10 * time.Second,
}
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log.Printf("Listening on %+s\n", portString)
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s.ListenAndServe()
}
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func migrateLanguages(db *gorm.DB, cfg *models.Config) {
for k, v := range cfg.CustomLanguages {
result := db.Model(models.Heartbeat{}).
Where("language = ?", "").
Where("entity LIKE ?", "%."+k).
Updates(models.Heartbeat{Language: v})
if result.Error != nil {
log.Fatal(result.Error)
}
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if result.RowsAffected > 0 {
log.Printf("Migrated %+v rows for custom language %+s.\n", result.RowsAffected, k)
}
}
}
func addDefaultUser(db *gorm.DB, cfg *models.Config) {
pw := md5.Sum([]byte(models.DefaultPassword))
pwString := hex.EncodeToString(pw[:])
apiKey := uuid.Must(uuid.NewV4()).String()
u := &models.User{ID: models.DefaultUser, Password: pwString, ApiKey: apiKey}
result := db.FirstOrCreate(u, &models.User{ID: u.ID})
if result.Error != nil {
log.Println("Unable to create default user.")
log.Fatal(result.Error)
}
if result.RowsAffected > 0 {
log.Printf("Created default user '%s' with password '%s' and API key '%s'.\n", u.ID, models.DefaultPassword, u.ApiKey)
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}
}