133 lines
3.5 KiB
Go
133 lines
3.5 KiB
Go
package client
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import (
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"fmt"
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"net/http"
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"github.com/docker/docker/api/types/versions"
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"github.com/pkg/errors"
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)
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// errConnectionFailed implements an error returned when connection failed.
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type errConnectionFailed struct {
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host string
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}
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// Error returns a string representation of an errConnectionFailed
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func (err errConnectionFailed) Error() string {
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if err.host == "" {
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return "Cannot connect to the Docker daemon. Is the docker daemon running on this host?"
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}
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return fmt.Sprintf("Cannot connect to the Docker daemon at %s. Is the docker daemon running?", err.host)
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}
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// IsErrConnectionFailed returns true if the error is caused by connection failed.
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func IsErrConnectionFailed(err error) bool {
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_, ok := errors.Cause(err).(errConnectionFailed)
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return ok
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}
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// ErrorConnectionFailed returns an error with host in the error message when connection to docker daemon failed.
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func ErrorConnectionFailed(host string) error {
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return errConnectionFailed{host: host}
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}
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type notFound interface {
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error
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NotFound() bool // Is the error a NotFound error
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}
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// IsErrNotFound returns true if the error is a NotFound error, which is returned
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// by the API when some object is not found.
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func IsErrNotFound(err error) bool {
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te, ok := err.(notFound)
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return ok && te.NotFound()
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}
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type objectNotFoundError struct {
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object string
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id string
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}
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func (e objectNotFoundError) NotFound() bool {
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return true
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}
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func (e objectNotFoundError) Error() string {
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return fmt.Sprintf("Error: No such %s: %s", e.object, e.id)
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}
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func wrapResponseError(err error, resp serverResponse, object, id string) error {
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switch {
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case err == nil:
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return nil
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case resp.statusCode == http.StatusNotFound:
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return objectNotFoundError{object: object, id: id}
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case resp.statusCode == http.StatusNotImplemented:
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return notImplementedError{message: err.Error()}
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default:
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return err
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}
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}
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// unauthorizedError represents an authorization error in a remote registry.
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type unauthorizedError struct {
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cause error
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}
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// Error returns a string representation of an unauthorizedError
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func (u unauthorizedError) Error() string {
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return u.cause.Error()
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}
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// IsErrUnauthorized returns true if the error is caused
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// when a remote registry authentication fails
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func IsErrUnauthorized(err error) bool {
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_, ok := err.(unauthorizedError)
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return ok
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}
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type pluginPermissionDenied struct {
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name string
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}
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func (e pluginPermissionDenied) Error() string {
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return "Permission denied while installing plugin " + e.name
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}
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// IsErrPluginPermissionDenied returns true if the error is caused
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// when a user denies a plugin's permissions
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func IsErrPluginPermissionDenied(err error) bool {
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_, ok := err.(pluginPermissionDenied)
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return ok
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}
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type notImplementedError struct {
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message string
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}
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func (e notImplementedError) Error() string {
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return e.message
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}
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func (e notImplementedError) NotImplemented() bool {
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return true
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}
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// IsErrNotImplemented returns true if the error is a NotImplemented error.
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// This is returned by the API when a requested feature has not been
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// implemented.
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func IsErrNotImplemented(err error) bool {
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te, ok := err.(notImplementedError)
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return ok && te.NotImplemented()
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}
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// NewVersionError returns an error if the APIVersion required
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// if less than the current supported version
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func (cli *Client) NewVersionError(APIrequired, feature string) error {
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if cli.version != "" && versions.LessThan(cli.version, APIrequired) {
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return fmt.Errorf("%q requires API version %s, but the Docker daemon API version is %s", feature, APIrequired, cli.version)
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}
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return nil
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}
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