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package containers
import (
"bytes"
"context"
"net/http"
"strings"
"github.com/containers/podman/v4/libpod/define"
"github.com/containers/podman/v4/pkg/api/handlers"
"github.com/containers/podman/v4/pkg/bindings"
"github.com/containers/podman/v4/pkg/domain/entities"
jsoniter "github.com/json-iterator/go"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
var json = jsoniter.ConfigCompatibleWithStandardLibrary
// ExecCreate creates a new exec session in an existing container.
// The exec session will not be started; that is done with ExecStart.
// Returns ID of new exec session, or an error if one occurred.
func ExecCreate(ctx context.Context, nameOrID string, config *handlers.ExecCreateConfig) (string, error) {
conn, err := bindings.GetClient(ctx)
if err != nil {
return "", err
}
if config == nil {
return "", errors.Errorf("must provide a configuration for exec session")
}
requestJSON, err := json.Marshal(config)
if err != nil {
return "", errors.Wrapf(err, "error marshalling exec config to JSON")
}
jsonReader := strings.NewReader(string(requestJSON))
resp, err := conn.DoRequest(ctx, jsonReader, http.MethodPost, "/containers/%s/exec", nil, nil, nameOrID)
if err != nil {
return "", err
}
defer resp.Body.Close()
respStruct := new(entities.IDResponse)
if err := resp.Process(respStruct); err != nil {
return "", err
}
return respStruct.ID, nil
}
// ExecInspect inspects an existing exec session, returning detailed information
// about it.
func ExecInspect(ctx context.Context, sessionID string, options *ExecInspectOptions) (*define.InspectExecSession, error) {
if options == nil {
options = new(ExecInspectOptions)
}
_ = options
conn, err := bindings.GetClient(ctx)
if err != nil {
return nil, err
}
logrus.Debugf("Inspecting session ID %q", sessionID)
resp, err := conn.DoRequest(ctx, nil, http.MethodGet, "/exec/%s/json", nil, nil, sessionID)
if err != nil {
return nil, err
}
defer resp.Body.Close()
respStruct := new(define.InspectExecSession)
if err := resp.Process(respStruct); err != nil {
return nil, err
}
return respStruct, nil
}
// ExecStart starts (but does not attach to) a given exec session.
func ExecStart(ctx context.Context, sessionID string, options *ExecStartOptions) error {
if options == nil {
options = new(ExecStartOptions)
}
_ = options
conn, err := bindings.GetClient(ctx)
if err != nil {
return err
}
logrus.Debugf("Starting exec session ID %q", sessionID)
// We force Detach to true
body := struct {
Detach bool `json:"Detach"`
}{
Detach: true,
}
bodyJSON, err := json.Marshal(body)
if err != nil {
return err
}
resp, err := conn.DoRequest(ctx, bytes.NewReader(bodyJSON), http.MethodPost, "/exec/%s/start", nil, nil, sessionID)
if err != nil {
return err
}
defer resp.Body.Close()
return resp.Process(nil)
}
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