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utils.go
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utils.go
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package utils
import (
"encoding/json"
"math/rand"
"regexp"
"net/http"
"encoding/base64"
"os"
"strconv"
"strings"
"io/ioutil"
"fmt"
"sync"
"time"
"path/filepath"
"github.com/shirou/gopsutil/v3/cpu"
"github.com/shirou/gopsutil/v3/mem"
"github.com/shirou/gopsutil/v3/disk"
"github.com/shirou/gopsutil/v3/net"
"golang.org/x/net/publicsuffix"
)
var ConfigLock sync.Mutex
var BaseMainConfig Config
var MainConfig Config
var IsHTTPS = false
var NewVersionAvailable = false
var NeedsRestart = false
var UpdateAvailable = map[string]bool{}
var RestartHTTPServer func()
var ReBootstrapContainer func(string) error
var LetsEncryptErrors = []string{}
var CONFIGFOLDER = "/var/lib/cosmos/"
var DefaultConfig = Config{
LoggingLevel: "INFO",
NewInstall: true,
AutoUpdate: true,
BlockedCountries: []string{
},
HTTPConfig: HTTPConfig{
HTTPSCertificateMode: "DISABLED",
GenerateMissingAuthCert: true,
HTTPPort: "80",
HTTPSPort: "443",
Hostname: "0.0.0.0",
ProxyConfig: ProxyConfig{
Routes: []ProxyRouteConfig{},
},
},
DockerConfig: DockerConfig{
DefaultDataPath: "/usr",
},
MarketConfig: MarketConfig{
Sources: []MarketSource{
},
},
ConstellationConfig: ConstellationConfig{
Enabled: false,
DNSDisabled: false,
DNSFallback: "8.8.8.8:53",
DNSAdditionalBlocklists: []string{
"https://s3.amazonaws.com/lists.disconnect.me/simple_tracking.txt",
"https://s3.amazonaws.com/lists.disconnect.me/simple_ad.txt",
"https://raw.githubusercontent.com/StevenBlack/hosts/master/hosts",
"https://raw.githubusercontent.com/StevenBlack/hosts/master/alternates/fakenews-only/hosts",
},
},
MonitoringAlerts: map[string]Alert{
"Anti Crypto-Miner": {
Name: "Anti Crypto-Miner",
Enabled: false,
Period: "daily",
TrackingMetric: "cosmos.system.docker.cpu.*",
LastTriggered: time.Time{},
Condition: AlertCondition {
Operator: "gt",
Value: 80,
Percent: false,
},
Actions: []AlertAction {
AlertAction {
Type: "notification",
Target: "",
},
AlertAction {
Type: "email",
Target: "",
},
AlertAction {
Type: "stop",
Target: "",
},
},
Throttled: false,
Severity: "warn",
},
"Anti Memory Leak": {
Name: "Anti Memory Leak",
Enabled: false,
Period: "daily",
TrackingMetric: "cosmos.system.docker.ram.*",
LastTriggered: time.Time{},
Condition: AlertCondition {
Operator: "gt",
Value: 80,
Percent: true,
},
Actions: []AlertAction {
{
Type: "notification",
Target: "",
},
{
Type: "email",
Target: "",
},
{
Type: "stop",
Target: "",
},
},
Throttled: false,
Severity: "warn",
},
"Disk Full Notification": {
Name: "Disk Full Notification",
Enabled: true,
Period: "latest",
TrackingMetric: "cosmos.system.disk./",
LastTriggered: time.Time{},
Condition: AlertCondition {
Operator: "gt",
Value: 95,
Percent: true,
},
Actions: []AlertAction {
{
Type: "notification",
Target: "",
},
},
Throttled: true,
Severity: "warn",
},
},
}
func FileExists(path string) bool {
_, err := os.Stat(path)
if err == nil {
return true
}
Error("Reading file error: ", err)
return false
}
func GetRootAppId() string {
return "COSMOS"
}
func GetPrivateAuthKey() string {
return MainConfig.HTTPConfig.AuthPrivateKey
}
func GetPublicAuthKey() string {
return MainConfig.HTTPConfig.AuthPublicKey
}
var AlphaNumRunes = []rune("0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ")
func GenerateRandomString(n int) string {
b := make([]rune, n)
for i := range b {
b[i] = AlphaNumRunes[rand.Intn(len(AlphaNumRunes))]
}
return string(b)
}
type HTTPErrorResult struct {
Status string `json:"status"`
Message string `json:"message"`
Code string `json:"code"`
}
func HTTPError(w http.ResponseWriter, message string, code int, userCode string) {
w.WriteHeader(code)
json.NewEncoder(w).Encode(HTTPErrorResult{
Status: "error",
Message: message,
Code: userCode,
})
Error("HTTP Request returned Error "+strconv.Itoa(code)+" : "+message, nil)
}
func SetBaseMainConfig(config Config) {
SaveConfigTofile(config)
LoadBaseMainConfig(config)
}
func ReadConfigFromFile() Config {
configFile := GetConfigFileName()
Log("Using config file: " + configFile)
if CreateDefaultConfigFileIfNecessary() {
LoadBaseMainConfig(DefaultConfig)
return DefaultConfig
}
file, err := os.Open(configFile)
if err != nil {
Fatal("Opening Config File: ", err)
}
defer file.Close()
decoder := json.NewDecoder(file)
config := Config{}
err = decoder.Decode(&config)
// check file is not empty
if err != nil {
// check error is not empty
if err.Error() == "EOF" {
Fatal("Reading Config File: File is empty.", err)
}
// get error string
errString := err.Error()
// replace string in error
m1 := regexp.MustCompile(`json: cannot unmarshal ([A-Za-z\.]+) into Go struct field ([A-Za-z\.]+) of type ([A-Za-z\.]+)`)
errString = m1.ReplaceAllString(errString, "Invalid JSON in config file.\n > Field $2 is wrong.\n > Type is $1 Should be $3")
Fatal("Reading Config File: " + errString, err)
}
return config
}
func LoadBaseMainConfig(config Config) {
BaseMainConfig = config
MainConfig = config
// use ENV to overwrite configs
if os.Getenv("COSMOS_HTTP_PORT") != "" {
MainConfig.HTTPConfig.HTTPPort = os.Getenv("COSMOS_HTTP_PORT")
}
if os.Getenv("COSMOS_HTTPS_PORT") != "" {
MainConfig.HTTPConfig.HTTPSPort = os.Getenv("COSMOS_HTTPS_PORT")
}
if os.Getenv("COSMOS_HOSTNAME") != "" {
MainConfig.HTTPConfig.Hostname = os.Getenv("COSMOS_HOSTNAME")
}
if os.Getenv("COSMOS_HTTPS_MODE") != "" {
MainConfig.HTTPConfig.HTTPSCertificateMode = os.Getenv("COSMOS_HTTPS_MODE")
}
if os.Getenv("COSMOS_GENERATE_MISSING_AUTH_CERT") != "" {
MainConfig.HTTPConfig.GenerateMissingAuthCert = os.Getenv("COSMOS_GENERATE_MISSING_AUTH_CERT") == "true"
}
if os.Getenv("COSMOS_TLS_CERT") != "" {
MainConfig.HTTPConfig.TLSCert = os.Getenv("COSMOS_TLS_CERT")
}
if os.Getenv("COSMOS_TLS_KEY") != "" {
MainConfig.HTTPConfig.TLSKey = os.Getenv("COSMOS_TLS_KEY")
}
if os.Getenv("COSMOS_AUTH_PRIV_KEY") != "" {
MainConfig.HTTPConfig.AuthPrivateKey = os.Getenv("COSMOS_AUTH_PRIVATE_KEY")
}
if os.Getenv("COSMOS_AUTH_PUBLIC_KEY") != "" {
MainConfig.HTTPConfig.AuthPublicKey = os.Getenv("COSMOS_AUTH_PUBLIC_KEY")
}
if os.Getenv("COSMOS_LOG_LEVEL") != "" {
MainConfig.LoggingLevel = (LoggingLevel)(os.Getenv("COSMOS_LOG_LEVEL"))
}
if os.Getenv("COSMOS_MONGODB") != "" {
MainConfig.MongoDB = os.Getenv("COSMOS_MONGODB")
}
if os.Getenv("COSMOS_SERVER_COUNTRY") != "" {
MainConfig.ServerCountry = os.Getenv("COSMOS_SERVER_COUNTRY")
}
if os.Getenv("COSMOS_CONFIG_FOLDER") != "" {
Log("Overwriting config folder with " + os.Getenv("COSMOS_CONFIG_FOLDER"))
CONFIGFOLDER = os.Getenv("COSMOS_CONFIG_FOLDER")
}
if MainConfig.DockerConfig.DefaultDataPath == "" {
MainConfig.DockerConfig.DefaultDataPath = "/usr"
}
if MainConfig.ConstellationConfig.ConstellationHostname == "" {
// if hostname is a domain add vpn. suffix otherwise use hostname
if IsDomain(MainConfig.HTTPConfig.Hostname) {
MainConfig.ConstellationConfig.ConstellationHostname = "vpn." + MainConfig.HTTPConfig.Hostname
} else {
MainConfig.ConstellationConfig.ConstellationHostname = MainConfig.HTTPConfig.Hostname
}
}
}
func GetMainConfig() Config {
return MainConfig
}
func GetBaseMainConfig() Config {
return BaseMainConfig
}
func Sanitize(s string) string {
return strings.ToLower(strings.TrimSpace(s))
}
func SanitizeSafe(s string) string {
return strings.TrimSpace(s)
}
func GetConfigFileName() string {
if os.Getenv("COSMOS_CONFIG_FOLDER") != "" {
CONFIGFOLDER = os.Getenv("COSMOS_CONFIG_FOLDER")
} else if os.Getenv("HOSTNAME") != "" {
CONFIGFOLDER = "/config/"
}
configFile := os.Getenv("CONFIG_FILE")
if configFile == "" {
configFile = CONFIGFOLDER + "cosmos.config.json"
}
return configFile
}
func CreateDefaultConfigFileIfNecessary() bool {
configFile := GetConfigFileName()
// get folder path
folderPath := strings.Split(configFile, "/")
folderPath = folderPath[:len(folderPath)-1]
folderPathString := strings.Join(folderPath, "/")
os.MkdirAll(folderPathString, os.ModePerm)
if _, err := os.Stat(configFile); os.IsNotExist(err) {
Log("Config file does not exist. Creating default config file.")
file, err := os.Create(configFile)
if err != nil {
Fatal("Creating Default Config File", err)
}
defer file.Close()
encoder := json.NewEncoder(file)
encoder.SetIndent("", " ")
err = encoder.Encode(DefaultConfig)
if err != nil {
Fatal("Writing Default Config File", err)
}
return true
}
return false
}
func SaveConfigTofile(config Config) {
configFile := GetConfigFileName()
CreateDefaultConfigFileIfNecessary()
file, err := os.OpenFile(configFile, os.O_RDWR|os.O_CREATE|os.O_TRUNC, os.ModePerm)
if err != nil {
Fatal("Opening Config File", err)
}
defer file.Close()
encoder := json.NewEncoder(file)
encoder.SetIndent("", " ")
err = encoder.Encode(config)
if err != nil {
Fatal("Writing Config File", err)
}
Log("Config file saved.")
}
func RestartServer() {
Log("Restarting server...")
os.Exit(0)
}
func LetsEncryptValidOnly(hostnames []string, acceptWildcard bool) []string {
wrongPattern := `^(localhost|\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}|.*\.local)$`
re, _ := regexp.Compile(wrongPattern)
var validDomains []string
for _, domain := range hostnames {
if !re.MatchString(domain) && (acceptWildcard || !strings.Contains(domain, "*")) && !strings.Contains(domain, " ") && !strings.Contains(domain, ",") {
validDomains = append(validDomains, domain)
} else {
Error("Invalid domain found in URLs: " + domain + " it was removed from the certificate to not break Let's Encrypt", nil)
}
}
return validDomains
}
func GetAllHostnames(applyWildCard bool, removePorts bool) []string {
mainHostname := GetMainConfig().HTTPConfig.Hostname
OverrideWildcardDomains := GetMainConfig().HTTPConfig.OverrideWildcardDomains
if removePorts {
mainHostname = strings.Split(mainHostname, ":")[0]
}
hostnames := []string{
mainHostname,
}
proxies := GetMainConfig().HTTPConfig.ProxyConfig.Routes
for _, proxy := range proxies {
if proxy.UseHost && proxy.Host != "" && !strings.Contains(proxy.Host, ",") && !strings.Contains(proxy.Host, " ") {
if removePorts {
hostnames = append(hostnames, strings.Split(proxy.Host, ":")[0])
} else {
hostnames = append(hostnames, proxy.Host)
}
}
}
// remove doubles
seen := make(map[string]bool)
uniqueHostnames := []string{}
for _, hostname := range hostnames {
if _, ok := seen[hostname]; !ok {
seen[hostname] = true
uniqueHostnames = append(uniqueHostnames, hostname)
}
}
if applyWildCard && MainConfig.HTTPConfig.UseWildcardCertificate {
bareMainHostname, _ := publicsuffix.EffectiveTLDPlusOne(mainHostname)
Debug("bareMainHostname: " + bareMainHostname)
filteredHostnames := []string{
bareMainHostname,
"*." + bareMainHostname,
}
if(OverrideWildcardDomains != "") {
filteredHostnames = strings.Split(OverrideWildcardDomains, ",")
}
for _, hostname := range uniqueHostnames {
if hostname != bareMainHostname && !strings.HasSuffix(hostname, "." + bareMainHostname) {
filteredHostnames = append(filteredHostnames, hostname)
}
}
uniqueHostnames = filteredHostnames
}
return uniqueHostnames
}
func GetAvailableRAM() uint64 {
vmStat, err := mem.VirtualMemory()
if err != nil {
panic(err)
}
// Use total available memory as an approximation
return vmStat.Available
}
func StringArrayEquals(a []string, b []string) bool {
if len(a) != len(b) {
return false
}
for _, value := range a {
if !StringArrayContains(b, value) {
return false
}
}
for _, value := range b {
if !StringArrayContains(a, value) {
return false
}
}
return true
}
func HasAnyNewItem(after []string, before []string) bool {
for _, value := range after {
if !StringArrayContains(before, value) {
return true
}
}
return false
}
func StringArrayContains(a []string, b string) bool {
for _, value := range a {
if value == b {
return true
}
}
return false
}
func GetServerURL() string {
ServerURL := ""
if IsHTTPS {
ServerURL += "https://"
} else {
ServerURL += "http://"
}
ServerURL += MainConfig.HTTPConfig.Hostname
if IsHTTPS && MainConfig.HTTPConfig.HTTPSPort != "443" {
ServerURL += ":" + MainConfig.HTTPConfig.HTTPSPort
}
if !IsHTTPS && MainConfig.HTTPConfig.HTTPPort != "80" {
ServerURL += ":" + MainConfig.HTTPConfig.HTTPPort
}
return ServerURL + "/"
}
func ImageToBase64(path string) (string, error) {
imageFile, err := os.Open(path)
if err != nil {
return "", err
}
defer imageFile.Close()
imageData, err := ioutil.ReadAll(imageFile)
if err != nil {
return "", err
}
encodedData := base64.StdEncoding.EncodeToString(imageData)
fileExt := strings.ToLower(filepath.Ext(path))
var mimeType string
switch fileExt {
case ".jpg", ".jpeg":
mimeType = "image/jpeg"
case ".png":
mimeType = "image/png"
case ".gif":
mimeType = "image/gif"
case ".bmp":
mimeType = "image/bmp"
default:
return "", fmt.Errorf("unsupported file format: %s", fileExt)
}
dataURI := fmt.Sprintf("data:%s;base64,%s", mimeType, encodedData)
return dataURI, nil
}
func Max(x, y int) int {
if x < y {
return y
}
return x
}
func GetCPUUsage() ([]float64) {
percentages, _ := cpu.Percent(time.Second, false)
return percentages
}
func GetRAMUsage() (uint64) {
v, _ := mem.VirtualMemory()
return v.Used
}
type DiskStatus struct {
Path string
TotalBytes uint64
UsedBytes uint64
}
func GetDiskUsage() []DiskStatus {
partitions, err := disk.Partitions(false)
if err != nil {
Error("Error getting disk partitions", err)
return nil
}
var diskStatuses []DiskStatus
for _, partition := range partitions {
usageStat, err := disk.Usage(partition.Mountpoint)
if err != nil {
Error("Error getting disk usage", err)
return nil
}
diskStatus := DiskStatus{
Path: partition.Mountpoint,
TotalBytes: usageStat.Total,
UsedBytes: usageStat.Used,
}
diskStatuses = append(diskStatuses, diskStatus)
}
return diskStatuses
}
type NetworkStatus struct {
BytesSent uint64
BytesRecv uint64
}
func GetNetworkUsage() NetworkStatus {
initialStat, err := net.IOCounters(true)
if err != nil {
Error("Error getting network usage", err)
return NetworkStatus{}
}
time.Sleep(1 * time.Second)
finalStat, err := net.IOCounters(true)
if err != nil {
Error("Error getting network usage", err)
return NetworkStatus{}
}
res := NetworkStatus{
BytesSent: 0,
BytesRecv: 0,
}
for i := range initialStat {
res.BytesSent += finalStat[i].BytesSent - initialStat[i].BytesSent
res.BytesRecv += finalStat[i].BytesRecv - initialStat[i].BytesRecv
}
return NetworkStatus{}
}
func DownloadFile(url string) (string, error) {
resp, err := http.Get(url)
if err != nil {
return "", err
}
defer resp.Body.Close()
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
return "", err
}
return string(body), nil
}
func GetClientIP(req *http.Request) string {
/*ip := req.Header.Get("X-Forwarded-For")
if ip == "" {
ip = req.RemoteAddr
}*/
return req.RemoteAddr
}
func IsDomain(domain string) bool {
// contains . and at least a letter and no special characters invalid in a domain
if strings.Contains(domain, ".") && strings.ContainsAny(domain, "abcdefghijklmnopqrstuvwxyz") && !strings.ContainsAny(domain, " !@#$%^&*()+=[]{}\\|;:'\",/<>?") {
return true
}
return false
}