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main.go
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main.go
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package main
import (
"fmt"
"log"
"net/http"
"os"
"os/signal"
"reflect"
"strconv"
"syscall"
"github.com/mainflux/mainflux"
"github.com/mainflux/mainflux/logger"
"github.com/mainflux/mainflux/pkg/errors"
mfSDK "github.com/mainflux/mainflux/pkg/sdk/go"
"github.com/mainflux/mainflux/provision"
"github.com/mainflux/mainflux/provision/api"
)
const (
defLogLevel = "debug"
defConfigFile = "config.toml"
defTLS = "false"
defCACerts = ""
defServerCert = ""
defServerKey = ""
defThingsLocation = "http://localhost"
defUsersLocation = "http://localhost"
defMQTTURL = "localhost:1883"
defHTTPPort = "8091"
defMfUser = "test@example.com"
defMfPass = "test"
defMfAPIKey = ""
defMfBSURL = "http://localhost:8202/things/configs"
defMfWhiteListURL = "http://localhost:8202/things/state"
defMfCertsURL = "http://localhost/certs"
defProvisionCerts = "false"
defProvisionBS = "true"
defBSAutoWhitelist = "true"
defBSContent = ""
envConfigFile = "MF_PROVISION_CONFIG_FILE"
envLogLevel = "MF_PROVISION_LOG_LEVEL"
envHTTPPort = "MF_PROVISION_HTTP_PORT"
envTLS = "MF_PROVISION_ENV_CLIENTS_TLS"
envCACerts = "MF_PROVISION_CA_CERTS"
envServerCert = "MF_PROVISION_SERVER_CERT"
envServerKey = "MF_PROVISION_SERVER_KEY"
envMQTTURL = "MF_PROVISION_MQTT_URL"
envUsersLocation = "MF_PROVISION_USERS_LOCATION"
envThingsLocation = "MF_PROVISION_THINGS_LOCATION"
envMfUser = "MF_PROVISION_USER"
envMfPass = "MF_PROVISION_PASS"
envMfAPIKey = "MF_PROVISION_API_KEY"
envMfCertsURL = "MF_PROVISION_CERTS_SVC_URL"
envProvisionCerts = "MF_PROVISION_X509_PROVISIONING"
envMfBSURL = "MF_PROVISION_BS_SVC_URL"
envMfBSWhiteListURL = "MF_PROVISION_BS_SVC_WHITELIST_URL"
envProvisionBS = "MF_PROVISION_BS_CONFIG_PROVISIONING"
envBSAutoWhiteList = "MF_PROVISION_BS_AUTO_WHITELIST"
envBSContent = "MF_PROVISION_BS_CONTENT"
)
var (
errMissingConfigFile = errors.New("missing config file setting")
errFailedToLoadConfigFile = errors.New("failed to load config from file")
errFailedToGetAutoWhiteList = errors.New("failed to get auto whitelist setting")
errFailGettingCertSettings = errors.New("failed to get certificate file setting")
errFailGettingTLSConf = errors.New("failed to get TLS setting")
errFailGettingProvBS = errors.New("failed to get BS url setting")
)
func main() {
cfg, err := loadConfig()
if err != nil {
log.Fatalf(err.Error())
}
logger, err := logger.New(os.Stdout, cfg.Server.LogLevel)
if err != nil {
log.Fatalf(err.Error())
}
if cfgFromFile, err := loadConfigFromFile(cfg.File); err != nil {
logger.Warn(fmt.Sprintf("Continue with settings from env, failed to load from: %s: %s", cfg.File, err))
} else {
// Merge environment variables and file settings.
mergeConfigs(&cfgFromFile, &cfg)
cfg = cfgFromFile
logger.Info("Continue with settings from file:" + cfg.File)
}
SDKCfg := mfSDK.Config{
BaseURL: cfg.Server.ThingsLocation,
BootstrapURL: cfg.Server.MfBSURL,
CertsURL: cfg.Server.MfCertsURL,
HTTPAdapterPrefix: "http",
MsgContentType: "application/json",
TLSVerification: cfg.Server.TLS,
}
SDK := mfSDK.NewSDK(SDKCfg)
svc := provision.New(cfg, SDK, logger)
svc = api.NewLoggingMiddleware(svc, logger)
errs := make(chan error, 2)
go startHTTPServer(svc, cfg, logger, errs)
go func() {
c := make(chan os.Signal)
signal.Notify(c, syscall.SIGINT)
errs <- fmt.Errorf("%s", <-c)
}()
err = <-errs
logger.Error(fmt.Sprintf("Provision service terminated: %s", err))
}
func startHTTPServer(svc provision.Service, cfg provision.Config, logger logger.Logger, errs chan error) {
p := fmt.Sprintf(":%s", cfg.Server.HTTPPort)
if cfg.Server.ServerCert != "" || cfg.Server.ServerKey != "" {
logger.Info(fmt.Sprintf("Provision service started using https on port %s with cert %s key %s",
cfg.Server.HTTPPort, cfg.Server.ServerCert, cfg.Server.ServerKey))
errs <- http.ListenAndServeTLS(p, cfg.Server.ServerCert, cfg.Server.ServerKey, api.MakeHandler(svc))
return
}
logger.Info(fmt.Sprintf("Provision service started using http on port %s", cfg.Server.HTTPPort))
errs <- http.ListenAndServe(p, api.MakeHandler(svc))
}
func loadConfigFromFile(file string) (provision.Config, error) {
_, err := os.Stat(file)
if os.IsNotExist(err) {
return provision.Config{}, errors.Wrap(errMissingConfigFile, err)
}
c, err := provision.Read(file)
if err != nil {
return provision.Config{}, errors.Wrap(errFailedToLoadConfigFile, err)
}
return c, nil
}
func loadConfig() (provision.Config, error) {
tls, err := strconv.ParseBool(mainflux.Env(envTLS, defTLS))
if err != nil {
return provision.Config{}, errors.Wrap(errFailGettingTLSConf, err)
}
provisionX509, err := strconv.ParseBool(mainflux.Env(envProvisionCerts, defProvisionCerts))
if err != nil {
return provision.Config{}, errors.Wrap(errFailGettingCertSettings, err)
}
provisionBS, err := strconv.ParseBool(mainflux.Env(envProvisionBS, defProvisionBS))
if err != nil {
return provision.Config{}, errors.Wrap(errFailGettingProvBS, fmt.Errorf(" for %s", envProvisionBS))
}
autoWhiteList, err := strconv.ParseBool(mainflux.Env(envBSAutoWhiteList, defBSAutoWhitelist))
if err != nil {
return provision.Config{}, errors.Wrap(errFailedToGetAutoWhiteList, fmt.Errorf(" for %s", envBSAutoWhiteList))
}
if autoWhiteList && !provisionBS {
return provision.Config{}, errors.New("Can't auto whitelist if auto config save is off")
}
cfg := provision.Config{
Server: provision.ServiceConf{
LogLevel: mainflux.Env(envLogLevel, defLogLevel),
CACerts: mainflux.Env(envCACerts, defCACerts),
ServerCert: mainflux.Env(envServerCert, defServerCert),
ServerKey: mainflux.Env(envServerKey, defServerKey),
HTTPPort: mainflux.Env(envHTTPPort, defHTTPPort),
MfBSURL: mainflux.Env(envMfBSURL, defMfBSURL),
MfWhiteListURL: mainflux.Env(envMfBSWhiteListURL, defMfWhiteListURL),
MfCertsURL: mainflux.Env(envMfCertsURL, defMfCertsURL),
MfUser: mainflux.Env(envMfUser, defMfUser),
MfPass: mainflux.Env(envMfPass, defMfPass),
MfAPIKey: mainflux.Env(envMfAPIKey, defMfAPIKey),
ThingsLocation: mainflux.Env(envThingsLocation, defThingsLocation),
UsersLocation: mainflux.Env(envUsersLocation, defUsersLocation),
TLS: tls,
},
Bootstrap: provision.Bootstrap{
X509Provision: provisionX509,
Provision: provisionBS,
AutoWhiteList: autoWhiteList,
Content: mainflux.Env(envBSContent, defBSContent),
},
// This is default conf for provision if there is no config file
Channels: []provision.Channel{
{
Name: "control-channel",
Metadata: map[string]interface{}{"type": "control"},
}, {
Name: "data-channel",
Metadata: map[string]interface{}{"type": "data"},
},
},
Things: []provision.Thing{
{
Name: "thing",
Metadata: map[string]interface{}{"external_id": "xxxxxx"},
},
},
}
cfg.File = mainflux.Env(envConfigFile, defConfigFile)
return cfg, nil
}
func mergeConfigs(dst, src interface{}) interface{} {
d := reflect.ValueOf(dst).Elem()
s := reflect.ValueOf(src).Elem()
for i := 0; i < d.NumField(); i++ {
dField := d.Field(i)
sField := s.Field(i)
switch dField.Kind() {
case reflect.Struct:
dst := dField.Addr().Interface()
src := sField.Addr().Interface()
m := mergeConfigs(dst, src)
val := reflect.ValueOf(m).Elem().Interface()
dField.Set(reflect.ValueOf(val))
case reflect.Slice:
case reflect.Bool:
if dField.Interface() == false {
dField.Set(reflect.ValueOf(sField.Interface()))
}
case reflect.String:
if dField.Interface() == "" {
dField.Set(reflect.ValueOf(sField.Interface()))
}
}
}
return dst
}