diff --git a/core/config/config.go b/core/config/config.go
index 1eace82a..4587ceae 100644
--- a/core/config/config.go
+++ b/core/config/config.go
@@ -1,11 +1,11 @@
 package config
 
 import (
+	"strings"
+
 	"github.com/apex/log"
-	"github.com/crawlab-team/crawlab/trace"
 	"github.com/fsnotify/fsnotify"
 	"github.com/spf13/viper"
-	"strings"
 )
 
 func init() {
@@ -65,7 +65,6 @@ func (c *Config) Init() (err error) {
 	// read in config
 	if err := viper.ReadInConfig(); err != nil {
 		log.Errorf("Error reading config file, %s", err)
-		trace.PrintError(err)
 		return err
 	}
 
diff --git a/core/config/config_test.go b/core/config/config_test.go
index d902687b..f8a3c433 100644
--- a/core/config/config_test.go
+++ b/core/config/config_test.go
@@ -1,11 +1,65 @@
 package config
 
 import (
-	"github.com/stretchr/testify/require"
+	"os"
+	"path/filepath"
 	"testing"
+
+	"github.com/spf13/viper"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 )
 
-func TestInitConfig(t *testing.T) {
-	err := InitConfig()
-	require.Nil(t, err)
+func init() {
+	// Set test environment variables
+	viper.Set("CRAWLAB_TEST_STRING", "test_string_value")
+	viper.Set("CRAWLAB_TEST_INT", 42)
+	viper.Set("CRAWLAB_TEST_BOOL", true)
+	viper.Set("CRAWLAB_TEST_NESTED_KEY", "nested_value")
+}
+
+func TestInitConfig(t *testing.T) {
+	// Create a temporary directory for the test
+	tempDir, err := os.MkdirTemp("", "crawlab-config-test")
+	require.NoError(t, err, "Failed to create temp directory")
+	defer os.RemoveAll(tempDir)
+
+	// Create a temporary config file
+	configContent := []byte(`
+log:
+  level: info
+test:
+  string: default_string_value
+  int: 0
+  bool: false
+  nested:
+    key: default_nested_value
+`)
+	configPath := filepath.Join(tempDir, "config.yaml")
+	err = os.WriteFile(configPath, configContent, 0644)
+	require.NoError(t, err, "Failed to write config file")
+
+	// Set up the test environment
+	oldConfigPath := viper.ConfigFileUsed()
+	defer viper.SetConfigFile(oldConfigPath)
+	viper.SetConfigFile(configPath)
+
+	// Create a new Config instance
+	c := Config{Name: configPath}
+
+	// Initialize the config
+	err = c.Init()
+	require.NoError(t, err, "Failed to initialize config")
+
+	// Test config values
+	assert.Equal(t, "default_string_value", viper.GetString("test.string"), "Unexpected value for test.string")
+	assert.Equal(t, 0, viper.GetInt("test.int"), "Unexpected value for test.int")
+	assert.False(t, viper.GetBool("test.bool"), "Unexpected value for test.bool")
+	assert.Equal(t, "default_nested_value", viper.GetString("test.nested.key"), "Unexpected value for test.nested.key")
+	assert.Empty(t, viper.GetString("non.existent.key"), "Non-existent key should return empty string")
+
+	// Test environment variable override
+	os.Setenv("CRAWLAB_TEST_STRING", "env_string_value")
+	defer os.Unsetenv("CRAWLAB_TEST_STRING")
+	assert.Equal(t, "env_string_value", viper.GetString("test.string"), "Environment variable should override config value")
 }
diff --git a/core/constants/action.go b/core/constants/action.go
deleted file mode 100644
index 389a11bc..00000000
--- a/core/constants/action.go
+++ /dev/null
@@ -1,8 +0,0 @@
-package constants
-
-const (
-	ActionTypeVisit          = "visit"
-	ActionTypeInstallDep     = "install_dep"
-	ActionTypeInstallLang    = "install_lang"
-	ActionTypeViewDisclaimer = "view_disclaimer"
-)
diff --git a/core/constants/anchor.go b/core/constants/anchor.go
deleted file mode 100644
index f462135f..00000000
--- a/core/constants/anchor.go
+++ /dev/null
@@ -1,8 +0,0 @@
-package constants
-
-const (
-	AnchorStartStage = "START_STAGE"
-	AnchorStartUrl   = "START_URL"
-	AnchorItems      = "ITEMS"
-	AnchorParsers    = "PARSERS"
-)
diff --git a/core/constants/auth.go b/core/constants/auth.go
deleted file mode 100644
index 136391a0..00000000
--- a/core/constants/auth.go
+++ /dev/null
@@ -1,7 +0,0 @@
-package constants
-
-const (
-	OwnerTypeAll    = "all"
-	OwnerTypeMe     = "me"
-	OwnerTypePublic = "public"
-)
diff --git a/core/constants/cache.go b/core/constants/cache.go
deleted file mode 100644
index c61186f0..00000000
--- a/core/constants/cache.go
+++ /dev/null
@@ -1,8 +0,0 @@
-package constants
-
-const (
-	CacheColName  = "cache"
-	CacheColKey   = "k"
-	CacheColValue = "v"
-	CacheColTime  = "t"
-)
diff --git a/core/constants/channels.go b/core/constants/channels.go
deleted file mode 100644
index c38a5ac9..00000000
--- a/core/constants/channels.go
+++ /dev/null
@@ -1,9 +0,0 @@
-package constants
-
-const (
-	ChannelAllNode = "nodes:public"
-
-	ChannelWorkerNode = "nodes:"
-
-	ChannelMasterNode = "nodes:master"
-)
diff --git a/core/constants/config_spider.go b/core/constants/config_spider.go
deleted file mode 100644
index c29624dc..00000000
--- a/core/constants/config_spider.go
+++ /dev/null
@@ -1,6 +0,0 @@
-package constants
-
-const (
-	EngineScrapy = "scrapy"
-	EngineColly  = "colly"
-)
diff --git a/core/constants/data_collection.go b/core/constants/data_collection.go
deleted file mode 100644
index b8505e93..00000000
--- a/core/constants/data_collection.go
+++ /dev/null
@@ -1,5 +0,0 @@
-package constants
-
-const (
-	DataCollectionKey = "_col"
-)
diff --git a/core/constants/data_field.go b/core/constants/data_field.go
deleted file mode 100644
index 604ad1d5..00000000
--- a/core/constants/data_field.go
+++ /dev/null
@@ -1,12 +0,0 @@
-package constants
-
-const (
-	DataFieldTypeGeneral  = "general"
-	DataFieldTypeNumeric  = "numeric"
-	DataFieldTypeDate     = "date"
-	DataFieldTypeCurrency = "currency"
-	DataFieldTypeUrl      = "url"
-	DataFieldTypeImage    = "image"
-	DataFieldTypeAudio    = "audio"
-	DataFieldTypeVideo    = "video"
-)
diff --git a/core/constants/database.go b/core/constants/database.go
deleted file mode 100644
index 31abb22e..00000000
--- a/core/constants/database.go
+++ /dev/null
@@ -1,5 +0,0 @@
-package constants
-
-const (
-	ColJob = "jobs"
-)
diff --git a/core/constants/delegate.go b/core/constants/delegate.go
deleted file mode 100644
index 1255fc8b..00000000
--- a/core/constants/delegate.go
+++ /dev/null
@@ -1 +0,0 @@
-package constants
diff --git a/core/constants/ds.go b/core/constants/ds.go
deleted file mode 100644
index 268c5761..00000000
--- a/core/constants/ds.go
+++ /dev/null
@@ -1,31 +0,0 @@
-package constants
-
-const (
-	DataSourceTypeMongo         = "mongo"
-	DataSourceTypeMysql         = "mysql"
-	DataSourceTypePostgresql    = "postgresql"
-	DataSourceTypeMssql         = "mssql"
-	DataSourceTypeSqlite        = "sqlite"
-	DataSourceTypeCockroachdb   = "cockroachdb"
-	DataSourceTypeElasticSearch = "elasticsearch"
-	DataSourceTypeKafka         = "kafka"
-)
-
-const (
-	DefaultHost = "localhost"
-)
-
-const (
-	DefaultMongoPort         = 27017
-	DefaultMysqlPort         = 3306
-	DefaultPostgresqlPort    = 5432
-	DefaultMssqlPort         = 1433
-	DefaultCockroachdbPort   = 26257
-	DefaultElasticsearchPort = 9200
-	DefaultKafkaPort         = 9092
-)
-
-const (
-	DataSourceStatusOnline  = "on"
-	DataSourceStatusOffline = "off"
-)
diff --git a/core/constants/errors.go b/core/constants/errors.go
index 11f46251..94305090 100644
--- a/core/constants/errors.go
+++ b/core/constants/errors.go
@@ -5,26 +5,10 @@ import (
 )
 
 var (
-	//ErrorMongoError                = e.NewSystemOPError(1001, "system error:[mongo]%s", http.StatusInternalServerError)
-	//ErrorUserNotFound              = e.NewBusinessError(10001, "user not found.", http.StatusUnauthorized)
-	//ErrorUsernameOrPasswordInvalid = e.NewBusinessError(11001, "username or password invalid", http.StatusUnauthorized)
-	ErrAlreadyExists    = errors.New("already exists")
-	ErrNotExists        = errors.New("not exists")
-	ErrForbidden        = errors.New("forbidden")
-	ErrInvalidOperation = errors.New("invalid operation")
-	ErrInvalidOptions   = errors.New("invalid options")
-	ErrNoTasksAvailable = errors.New("no tasks available")
-	ErrInvalidType      = errors.New("invalid type")
-	ErrInvalidSignal    = errors.New("invalid signal")
-	ErrEmptyValue       = errors.New("empty value")
-	ErrTaskError        = errors.New("task error")
-	ErrTaskLost         = errors.New("task lost")
-	ErrTaskCancelled    = errors.New("task cancelled")
-	ErrUnableToCancel   = errors.New("unable to cancel")
-	ErrUnableToDispose  = errors.New("unable to dispose")
-	ErrAlreadyDisposed  = errors.New("already disposed")
-	ErrStopped          = errors.New("stopped")
-	ErrMissingCol       = errors.New("missing col")
-	ErrInvalidValue     = errors.New("invalid value")
-	ErrInvalidCronSpec  = errors.New("invalid cron spec")
+	ErrNotExists      = errors.New("not exists")
+	ErrInvalidOptions = errors.New("invalid options")
+	ErrInvalidSignal  = errors.New("invalid signal")
+	ErrTaskError      = errors.New("task error")
+	ErrTaskLost       = errors.New("task lost")
+	ErrTaskCancelled  = errors.New("task cancelled")
 )
diff --git a/core/constants/event.go b/core/constants/event.go
deleted file mode 100644
index d474c165..00000000
--- a/core/constants/event.go
+++ /dev/null
@@ -1,6 +0,0 @@
-package constants
-
-const (
-	GrpcEventServiceTypeRegister = "register"
-	GrpcEventServiceTypeSend     = "send"
-)
diff --git a/core/constants/file.go b/core/constants/file.go
deleted file mode 100644
index 499ea993..00000000
--- a/core/constants/file.go
+++ /dev/null
@@ -1,5 +0,0 @@
-package constants
-
-const EmptyFileData = " "
-
-const FsKeepFileName = ".gitkeep"
diff --git a/core/constants/filer.go b/core/constants/filer.go
deleted file mode 100644
index 0fdcc6f3..00000000
--- a/core/constants/filer.go
+++ /dev/null
@@ -1,5 +0,0 @@
-package constants
-
-const (
-	DefaultFilerAuthKey = "Crawlab2021!"
-)
diff --git a/core/constants/filter.go b/core/constants/filter.go
index a8403568..9ed1d8db 100644
--- a/core/constants/filter.go
+++ b/core/constants/filter.go
@@ -6,12 +6,6 @@ const (
 	FilterQueryFieldFilter     = "filter"
 )
 
-const (
-	FilterObjectTypeString  = "string"
-	FilterObjectTypeNumber  = "number"
-	FilterObjectTypeBoolean = "boolean"
-)
-
 const (
 	FilterOpNotSet           = "ns"
 	FilterOpContains         = "c"
diff --git a/core/constants/git.go b/core/constants/git.go
index 7fa5f7c2..1255fc8b 100644
--- a/core/constants/git.go
+++ b/core/constants/git.go
@@ -1,16 +1 @@
 package constants
-
-const (
-	GitAuthTypeHttp = "http"
-	GitAuthTypeSsh  = "ssh"
-)
-
-const (
-	GitRemoteNameUpstream = "upstream"
-	GitRemoteNameOrigin   = "origin"
-)
-
-const (
-	GitBranchMaster = "master"
-	GitBranchMain   = "main"
-)
diff --git a/core/constants/grpc.go b/core/constants/grpc.go
index 83915209..4577f7c2 100644
--- a/core/constants/grpc.go
+++ b/core/constants/grpc.go
@@ -11,7 +11,3 @@ const (
 const (
 	GrpcHeaderAuthorization = "authorization"
 )
-
-const (
-	GrpcSubscribeTypeNode = "node"
-)
diff --git a/core/constants/http.go b/core/constants/http.go
index 43d7a84b..ab3bf8ee 100644
--- a/core/constants/http.go
+++ b/core/constants/http.go
@@ -5,7 +5,3 @@ const (
 	HttpResponseMessageSuccess = "success"
 	HttpResponseMessageError   = "error"
 )
-
-const (
-	HttpContentTypeApplicationJson = "application/json"
-)
diff --git a/core/constants/log.go b/core/constants/log.go
deleted file mode 100644
index 5f0b4a66..00000000
--- a/core/constants/log.go
+++ /dev/null
@@ -1,5 +0,0 @@
-package constants
-
-const (
-	ErrorRegexPattern = "(?:[ :,.]|^)((?:error|exception|traceback)s?)(?:[ :,.]|$)"
-)
diff --git a/core/constants/message.go b/core/constants/message.go
deleted file mode 100644
index 72e5fab2..00000000
--- a/core/constants/message.go
+++ /dev/null
@@ -1,9 +0,0 @@
-package constants
-
-const (
-	MsgTypeGetLog        = "get-log"
-	MsgTypeGetSystemInfo = "get-sys-info"
-	MsgTypeCancelTask    = "cancel-task"
-	MsgTypeRemoveLog     = "remove-log"
-	MsgTypeRemoveSpider  = "remove-spider"
-)
diff --git a/core/constants/register.go b/core/constants/register.go
deleted file mode 100644
index b48f8a11..00000000
--- a/core/constants/register.go
+++ /dev/null
@@ -1,8 +0,0 @@
-package constants
-
-const (
-	RegisterTypeMac        = "mac"
-	RegisterTypeIp         = "ip"
-	RegisterTypeHostname   = "hostname"
-	RegisterTypeCustomName = "customName"
-)
diff --git a/core/constants/results.go b/core/constants/results.go
deleted file mode 100644
index 7053111f..00000000
--- a/core/constants/results.go
+++ /dev/null
@@ -1,10 +0,0 @@
-package constants
-
-const (
-	HashKey = "_h"
-)
-
-const (
-	DedupTypeIgnore    = "ignore"
-	DedupTypeOverwrite = "overwrite"
-)
diff --git a/core/constants/rpc.go b/core/constants/rpc.go
deleted file mode 100644
index 0fd7ad9f..00000000
--- a/core/constants/rpc.go
+++ /dev/null
@@ -1,12 +0,0 @@
-package constants
-
-const (
-	RpcInstallLang          = "install_lang"
-	RpcInstallDep           = "install_dep"
-	RpcUninstallDep         = "uninstall_dep"
-	RpcGetInstalledDepList  = "get_installed_dep_list"
-	RpcGetLang              = "get_lang"
-	RpcCancelTask           = "cancel_task"
-	RpcGetSystemInfoService = "get_system_info"
-	RpcRemoveSpider         = "remove_spider"
-)
diff --git a/core/constants/schedule.go b/core/constants/schedule.go
deleted file mode 100644
index 520626a9..00000000
--- a/core/constants/schedule.go
+++ /dev/null
@@ -1,10 +0,0 @@
-package constants
-
-const (
-	ScheduleStatusStop    = "stopped"
-	ScheduleStatusRunning = "running"
-	ScheduleStatusError   = "error"
-
-	ScheduleStatusErrorNotFoundNode   = "Not Found Node"
-	ScheduleStatusErrorNotFoundSpider = "Not Found Spider"
-)
diff --git a/core/constants/scrapy.go b/core/constants/scrapy.go
deleted file mode 100644
index bc82508f..00000000
--- a/core/constants/scrapy.go
+++ /dev/null
@@ -1,5 +0,0 @@
-package constants
-
-const ScrapyProtectedStageNames = ""
-
-const ScrapyProtectedFieldNames = "_id,task_id,ts"
diff --git a/core/constants/signal.go b/core/constants/signal.go
deleted file mode 100644
index dd4cd0b4..00000000
--- a/core/constants/signal.go
+++ /dev/null
@@ -1,5 +0,0 @@
-package constants
-
-const (
-	SignalQuit = iota
-)
diff --git a/core/constants/system.go b/core/constants/system.go
deleted file mode 100644
index 14c45698..00000000
--- a/core/constants/system.go
+++ /dev/null
@@ -1,25 +0,0 @@
-package constants
-
-const (
-	Windows = "windows"
-	Linux   = "linux"
-	Darwin  = "darwin"
-)
-
-const (
-	Python = "python"
-	Nodejs = "node"
-	Java   = "java"
-)
-
-const (
-	InstallStatusNotInstalled    = "not-installed"
-	InstallStatusInstalling      = "installing"
-	InstallStatusInstallingOther = "installing-other"
-	InstallStatusInstalled       = "installed"
-)
-
-const (
-	LangTypeLang      = "lang"
-	LangTypeWebDriver = "webdriver"
-)
diff --git a/core/constants/variable.go b/core/constants/variable.go
deleted file mode 100644
index 713fbe2d..00000000
--- a/core/constants/variable.go
+++ /dev/null
@@ -1,9 +0,0 @@
-package constants
-
-const (
-	String  = "string"
-	Number  = "number"
-	Boolean = "boolean"
-	Array   = "array"
-	Object  = "object"
-)
diff --git a/core/container/container.go b/core/container/container.go
deleted file mode 100644
index 3dfffe52..00000000
--- a/core/container/container.go
+++ /dev/null
@@ -1,11 +0,0 @@
-package container
-
-import (
-	"go.uber.org/dig"
-)
-
-var c = dig.New()
-
-func GetContainer() *dig.Container {
-	return c
-}
diff --git a/core/utils/file.go b/core/utils/file.go
index 572730ec..9e09d4d5 100644
--- a/core/utils/file.go
+++ b/core/utils/file.go
@@ -6,7 +6,6 @@ import (
 	"encoding/hex"
 	"fmt"
 	"github.com/apex/log"
-	"github.com/crawlab-team/crawlab/core/constants"
 	"github.com/crawlab-team/crawlab/core/entity"
 	"io"
 	"io/fs"
@@ -211,13 +210,6 @@ func _Compress(file *os.File, prefix string, zw *zip.Writer) error {
 	return nil
 }
 
-func TrimFileData(data []byte) (res []byte) {
-	if string(data) == constants.EmptyFileData {
-		return res
-	}
-	return data
-}
-
 func ZipDirectory(dir, zipfile string) error {
 	zipFile, err := os.Create(zipfile)
 	if err != nil {