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package client // import "github.com/docker/docker/client"
import (
"context"
"encoding/json"
"net/http"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/container"
"github.com/docker/docker/api/types/versions"
)
// ContainerExecCreate creates a new exec configuration to run an exec process.
func (cli *Client) ContainerExecCreate(ctx context.Context, container string, options container.ExecOptions) (types.IDResponse, error) {
var response types.IDResponse
// Make sure we negotiated (if the client is configured to do so),
// as code below contains API-version specific handling of options.
//
// Normally, version-negotiation (if enabled) would not happen until
// the API request is made.
if err := cli.checkVersion(ctx); err != nil {
return response, err
}
if err := cli.NewVersionError(ctx, "1.25", "env"); len(options.Env) != 0 && err != nil {
return response, err
}
if versions.LessThan(cli.ClientVersion(), "1.42") {
options.ConsoleSize = nil
}
resp, err := cli.post(ctx, "/containers/"+container+"/exec", nil, options, nil)
defer ensureReaderClosed(resp)
if err != nil {
return response, err
}
err = json.NewDecoder(resp.body).Decode(&response)
return response, err
}
// ContainerExecStart starts an exec process already created in the docker host.
func (cli *Client) ContainerExecStart(ctx context.Context, execID string, config container.ExecStartOptions) error {
if versions.LessThan(cli.ClientVersion(), "1.42") {
config.ConsoleSize = nil
}
resp, err := cli.post(ctx, "/exec/"+execID+"/start", nil, config, nil)
ensureReaderClosed(resp)
return err
}
// ContainerExecAttach attaches a connection to an exec process in the server.
// It returns a types.HijackedConnection with the hijacked connection
// and the a reader to get output. It's up to the called to close
// the hijacked connection by calling types.HijackedResponse.Close.
func (cli *Client) ContainerExecAttach(ctx context.Context, execID string, config container.ExecAttachOptions) (types.HijackedResponse, error) {
if versions.LessThan(cli.ClientVersion(), "1.42") {
config.ConsoleSize = nil
}
return cli.postHijacked(ctx, "/exec/"+execID+"/start", nil, config, http.Header{
"Content-Type": {"application/json"},
})
}
// ContainerExecInspect returns information about a specific exec process on the docker host.
func (cli *Client) ContainerExecInspect(ctx context.Context, execID string) (container.ExecInspect, error) {
var response container.ExecInspect
resp, err := cli.get(ctx, "/exec/"+execID+"/json", nil, nil)
if err != nil {
return response, err
}
err = json.NewDecoder(resp.body).Decode(&response)
ensureReaderClosed(resp)
return response, err
}
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