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https://github.com/podman-container-tools/podman.git
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5df883e87d
One of the main uses of context.Context is to provide cancellation for go-routines, including API requests. While all user-facing bindings already used a context parameter, it was only used to pass the client information around. This commit changes the internal DoRequest wrapper to take an additional context argument, and pass that to the http request. Previously, the context was derived from context.Background(), which made it impossible to cancel once started. All the convenience wrappers already supported the context parameter, so the only user facing change is that cancelling those context now works as one would expect. Signed-off-by: Moritz "WanzenBug" Wanzenböck <moritz@wanzenbug.xyz>
65 lines
1.5 KiB
Go
65 lines
1.5 KiB
Go
package containers
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import (
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"context"
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"fmt"
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"io"
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"net/http"
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"strconv"
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"github.com/containers/podman/v3/pkg/bindings"
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"github.com/pkg/errors"
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)
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// Logs obtains a container's logs given the options provided. The logs are then sent to the
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// stdout|stderr channels as strings.
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func Logs(ctx context.Context, nameOrID string, options *LogOptions, stdoutChan, stderrChan chan string) error {
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if options == nil {
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options = new(LogOptions)
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}
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conn, err := bindings.GetClient(ctx)
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if err != nil {
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return err
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}
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params, err := options.ToParams()
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if err != nil {
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return err
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}
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// The API requires either stdout|stderr be used. If neither are specified, we specify stdout
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if options.Stdout == nil && options.Stderr == nil {
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params.Set("stdout", strconv.FormatBool(true))
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}
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response, err := conn.DoRequest(ctx, nil, http.MethodGet, "/containers/%s/logs", params, nil, nameOrID)
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if err != nil {
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return err
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}
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defer response.Body.Close()
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buffer := make([]byte, 1024)
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for {
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fd, l, err := DemuxHeader(response.Body, buffer)
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if err != nil {
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if errors.Is(err, io.EOF) || errors.Is(err, io.ErrUnexpectedEOF) {
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return nil
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}
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return err
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}
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frame, err := DemuxFrame(response.Body, buffer, l)
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if err != nil {
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return err
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}
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switch fd {
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case 0:
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stdoutChan <- string(frame)
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case 1:
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stdoutChan <- string(frame)
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case 2:
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stderrChan <- string(frame)
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case 3:
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return errors.New("error from service in stream: " + string(frame))
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default:
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return fmt.Errorf("unrecognized input header: %d", fd)
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}
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}
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}
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