331 lines
9.5 KiB
Go
331 lines
9.5 KiB
Go
package opts
|
|
|
|
import (
|
|
"fmt"
|
|
"net"
|
|
"os"
|
|
"regexp"
|
|
"strconv"
|
|
"strings"
|
|
|
|
"github.com/docker/docker/pkg/blkiodev"
|
|
"github.com/docker/go-units"
|
|
)
|
|
|
|
var (
|
|
alphaRegexp = regexp.MustCompile(`[a-zA-Z]`)
|
|
domainRegexp = regexp.MustCompile(`^(:?(:?[a-zA-Z0-9]|(:?[a-zA-Z0-9][a-zA-Z0-9\-]*[a-zA-Z0-9]))(:?\.(:?[a-zA-Z0-9]|(:?[a-zA-Z0-9][a-zA-Z0-9\-]*[a-zA-Z0-9])))*)\.?\s*$`)
|
|
)
|
|
|
|
// ListOpts holds a list of values and a validation function.
|
|
type ListOpts struct {
|
|
values *[]string
|
|
validator ValidatorFctType
|
|
}
|
|
|
|
// NewListOpts creates a new ListOpts with the specified validator.
|
|
func NewListOpts(validator ValidatorFctType) ListOpts {
|
|
var values []string
|
|
return *NewListOptsRef(&values, validator)
|
|
}
|
|
|
|
// NewListOptsRef creates a new ListOpts with the specified values and validator.
|
|
func NewListOptsRef(values *[]string, validator ValidatorFctType) *ListOpts {
|
|
return &ListOpts{
|
|
values: values,
|
|
validator: validator,
|
|
}
|
|
}
|
|
|
|
func (opts *ListOpts) String() string {
|
|
return fmt.Sprintf("%v", []string((*opts.values)))
|
|
}
|
|
|
|
// Set validates if needed the input value and add it to the
|
|
// internal slice.
|
|
func (opts *ListOpts) Set(value string) error {
|
|
if opts.validator != nil {
|
|
v, err := opts.validator(value)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
value = v
|
|
}
|
|
(*opts.values) = append((*opts.values), value)
|
|
return nil
|
|
}
|
|
|
|
// Delete removes the specified element from the slice.
|
|
func (opts *ListOpts) Delete(key string) {
|
|
for i, k := range *opts.values {
|
|
if k == key {
|
|
(*opts.values) = append((*opts.values)[:i], (*opts.values)[i+1:]...)
|
|
return
|
|
}
|
|
}
|
|
}
|
|
|
|
// GetMap returns the content of values in a map in order to avoid
|
|
// duplicates.
|
|
func (opts *ListOpts) GetMap() map[string]struct{} {
|
|
ret := make(map[string]struct{})
|
|
for _, k := range *opts.values {
|
|
ret[k] = struct{}{}
|
|
}
|
|
return ret
|
|
}
|
|
|
|
// GetAll returns the values of slice.
|
|
func (opts *ListOpts) GetAll() []string {
|
|
return (*opts.values)
|
|
}
|
|
|
|
// GetAllOrEmpty returns the values of the slice
|
|
// or an empty slice when there are no values.
|
|
func (opts *ListOpts) GetAllOrEmpty() []string {
|
|
v := *opts.values
|
|
if v == nil {
|
|
return make([]string, 0)
|
|
}
|
|
return v
|
|
}
|
|
|
|
// Get checks the existence of the specified key.
|
|
func (opts *ListOpts) Get(key string) bool {
|
|
for _, k := range *opts.values {
|
|
if k == key {
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|
|
|
|
// Len returns the amount of element in the slice.
|
|
func (opts *ListOpts) Len() int {
|
|
return len((*opts.values))
|
|
}
|
|
|
|
//MapOpts holds a map of values and a validation function.
|
|
type MapOpts struct {
|
|
values map[string]string
|
|
validator ValidatorFctType
|
|
}
|
|
|
|
// Set validates if needed the input value and add it to the
|
|
// internal map, by splitting on '='.
|
|
func (opts *MapOpts) Set(value string) error {
|
|
if opts.validator != nil {
|
|
v, err := opts.validator(value)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
value = v
|
|
}
|
|
vals := strings.SplitN(value, "=", 2)
|
|
if len(vals) == 1 {
|
|
(opts.values)[vals[0]] = ""
|
|
} else {
|
|
(opts.values)[vals[0]] = vals[1]
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// GetAll returns the values of MapOpts as a map.
|
|
func (opts *MapOpts) GetAll() map[string]string {
|
|
return opts.values
|
|
}
|
|
|
|
func (opts *MapOpts) String() string {
|
|
return fmt.Sprintf("%v", map[string]string((opts.values)))
|
|
}
|
|
|
|
// NewMapOpts creates a new MapOpts with the specified map of values and a validator.
|
|
func NewMapOpts(values map[string]string, validator ValidatorFctType) *MapOpts {
|
|
if values == nil {
|
|
values = make(map[string]string)
|
|
}
|
|
return &MapOpts{
|
|
values: values,
|
|
validator: validator,
|
|
}
|
|
}
|
|
|
|
// ValidatorFctType defines a validator function that returns a validated string and/or an error.
|
|
type ValidatorFctType func(val string) (string, error)
|
|
|
|
// ValidatorWeightFctType defines a validator function that returns a validated struct and/or an error.
|
|
type ValidatorWeightFctType func(val string) (*blkiodev.WeightDevice, error)
|
|
|
|
// ValidatorThrottleFctType defines a validator function that returns a validated struct and/or an error.
|
|
type ValidatorThrottleFctType func(val string) (*blkiodev.ThrottleDevice, error)
|
|
|
|
// ValidatorFctListType defines a validator function that returns a validated list of string and/or an error
|
|
type ValidatorFctListType func(val string) ([]string, error)
|
|
|
|
// ValidateAttach validates that the specified string is a valid attach option.
|
|
func ValidateAttach(val string) (string, error) {
|
|
s := strings.ToLower(val)
|
|
for _, str := range []string{"stdin", "stdout", "stderr"} {
|
|
if s == str {
|
|
return s, nil
|
|
}
|
|
}
|
|
return val, fmt.Errorf("valid streams are STDIN, STDOUT and STDERR")
|
|
}
|
|
|
|
// ValidateWeightDevice validates that the specified string has a valid device-weight format.
|
|
func ValidateWeightDevice(val string) (*blkiodev.WeightDevice, error) {
|
|
split := strings.SplitN(val, ":", 2)
|
|
if len(split) != 2 {
|
|
return nil, fmt.Errorf("bad format: %s", val)
|
|
}
|
|
if !strings.HasPrefix(split[0], "/dev/") {
|
|
return nil, fmt.Errorf("bad format for device path: %s", val)
|
|
}
|
|
weight, err := strconv.ParseUint(split[1], 10, 0)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("invalid weight for device: %s", val)
|
|
}
|
|
if weight > 0 && (weight < 10 || weight > 1000) {
|
|
return nil, fmt.Errorf("invalid weight for device: %s", val)
|
|
}
|
|
|
|
return &blkiodev.WeightDevice{
|
|
Path: split[0],
|
|
Weight: uint16(weight),
|
|
}, nil
|
|
}
|
|
|
|
// ValidateThrottleBpsDevice validates that the specified string has a valid device-rate format.
|
|
func ValidateThrottleBpsDevice(val string) (*blkiodev.ThrottleDevice, error) {
|
|
split := strings.SplitN(val, ":", 2)
|
|
if len(split) != 2 {
|
|
return nil, fmt.Errorf("bad format: %s", val)
|
|
}
|
|
if !strings.HasPrefix(split[0], "/dev/") {
|
|
return nil, fmt.Errorf("bad format for device path: %s", val)
|
|
}
|
|
rate, err := units.RAMInBytes(split[1])
|
|
if err != nil {
|
|
return nil, fmt.Errorf("invalid rate for device: %s. The correct format is <device-path>:<number>[<unit>]. Number must be a positive integer. Unit is optional and can be kb, mb, or gb", val)
|
|
}
|
|
if rate < 0 {
|
|
return nil, fmt.Errorf("invalid rate for device: %s. The correct format is <device-path>:<number>[<unit>]. Number must be a positive integer. Unit is optional and can be kb, mb, or gb", val)
|
|
}
|
|
|
|
return &blkiodev.ThrottleDevice{
|
|
Path: split[0],
|
|
Rate: uint64(rate),
|
|
}, nil
|
|
}
|
|
|
|
// ValidateThrottleIOpsDevice validates that the specified string has a valid device-rate format.
|
|
func ValidateThrottleIOpsDevice(val string) (*blkiodev.ThrottleDevice, error) {
|
|
split := strings.SplitN(val, ":", 2)
|
|
if len(split) != 2 {
|
|
return nil, fmt.Errorf("bad format: %s", val)
|
|
}
|
|
if !strings.HasPrefix(split[0], "/dev/") {
|
|
return nil, fmt.Errorf("bad format for device path: %s", val)
|
|
}
|
|
rate, err := strconv.ParseUint(split[1], 10, 64)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("invalid rate for device: %s. The correct format is <device-path>:<number>. Number must be a positive integer", val)
|
|
}
|
|
if rate < 0 {
|
|
return nil, fmt.Errorf("invalid rate for device: %s. The correct format is <device-path>:<number>. Number must be a positive integer", val)
|
|
}
|
|
|
|
return &blkiodev.ThrottleDevice{
|
|
Path: split[0],
|
|
Rate: uint64(rate),
|
|
}, nil
|
|
}
|
|
|
|
// ValidateEnv validates an environment variable and returns it.
|
|
// If no value is specified, it returns the current value using os.Getenv.
|
|
//
|
|
// As on ParseEnvFile and related to #16585, environment variable names
|
|
// are not validate what so ever, it's up to application inside docker
|
|
// to validate them or not.
|
|
func ValidateEnv(val string) (string, error) {
|
|
arr := strings.Split(val, "=")
|
|
if len(arr) > 1 {
|
|
return val, nil
|
|
}
|
|
if !doesEnvExist(val) {
|
|
return val, nil
|
|
}
|
|
return fmt.Sprintf("%s=%s", val, os.Getenv(val)), nil
|
|
}
|
|
|
|
// ValidateIPAddress validates an Ip address.
|
|
func ValidateIPAddress(val string) (string, error) {
|
|
var ip = net.ParseIP(strings.TrimSpace(val))
|
|
if ip != nil {
|
|
return ip.String(), nil
|
|
}
|
|
return "", fmt.Errorf("%s is not an ip address", val)
|
|
}
|
|
|
|
// ValidateMACAddress validates a MAC address.
|
|
func ValidateMACAddress(val string) (string, error) {
|
|
_, err := net.ParseMAC(strings.TrimSpace(val))
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
return val, nil
|
|
}
|
|
|
|
// ValidateDNSSearch validates domain for resolvconf search configuration.
|
|
// A zero length domain is represented by a dot (.).
|
|
func ValidateDNSSearch(val string) (string, error) {
|
|
if val = strings.Trim(val, " "); val == "." {
|
|
return val, nil
|
|
}
|
|
return validateDomain(val)
|
|
}
|
|
|
|
func validateDomain(val string) (string, error) {
|
|
if alphaRegexp.FindString(val) == "" {
|
|
return "", fmt.Errorf("%s is not a valid domain", val)
|
|
}
|
|
ns := domainRegexp.FindSubmatch([]byte(val))
|
|
if len(ns) > 0 && len(ns[1]) < 255 {
|
|
return string(ns[1]), nil
|
|
}
|
|
return "", fmt.Errorf("%s is not a valid domain", val)
|
|
}
|
|
|
|
// ValidateExtraHost validates that the specified string is a valid extrahost and returns it.
|
|
// ExtraHost are in the form of name:ip where the ip has to be a valid ip (ipv4 or ipv6).
|
|
func ValidateExtraHost(val string) (string, error) {
|
|
// allow for IPv6 addresses in extra hosts by only splitting on first ":"
|
|
arr := strings.SplitN(val, ":", 2)
|
|
if len(arr) != 2 || len(arr[0]) == 0 {
|
|
return "", fmt.Errorf("bad format for add-host: %q", val)
|
|
}
|
|
if _, err := ValidateIPAddress(arr[1]); err != nil {
|
|
return "", fmt.Errorf("invalid IP address in add-host: %q", arr[1])
|
|
}
|
|
return val, nil
|
|
}
|
|
|
|
// ValidateLabel validates that the specified string is a valid label, and returns it.
|
|
// Labels are in the form on key=value.
|
|
func ValidateLabel(val string) (string, error) {
|
|
if strings.Count(val, "=") < 1 {
|
|
return "", fmt.Errorf("bad attribute format: %s", val)
|
|
}
|
|
return val, nil
|
|
}
|
|
|
|
func doesEnvExist(name string) bool {
|
|
for _, entry := range os.Environ() {
|
|
parts := strings.SplitN(entry, "=", 2)
|
|
if parts[0] == name {
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|