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package system
import (
"context"
"encoding/json"
"io"
"net/http"
"net/url"
"github.com/containers/libpod/pkg/api/handlers"
"github.com/containers/libpod/pkg/bindings"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
// Events allows you to monitor libdpod related events like container creation and
// removal. The events are then passed to the eventChan provided. The optional cancelChan
// can be used to cancel the read of events and close down the HTTP connection.
func Events(ctx context.Context, eventChan chan (handlers.Event), cancelChan chan bool, since, until *string, filters map[string][]string) error {
conn, err := bindings.GetClient(ctx)
if err != nil {
return err
}
params := url.Values{}
if since != nil {
params.Set("since", *since)
}
if until != nil {
params.Set("until", *until)
}
if filters != nil {
filterString, err := bindings.FiltersToString(filters)
if err != nil {
return errors.Wrap(err, "invalid filters")
}
params.Set("filters", filterString)
}
response, err := conn.DoRequest(nil, http.MethodGet, "/events", params)
if err != nil {
return err
}
if cancelChan != nil {
go func() {
<-cancelChan
err = response.Body.Close()
logrus.Error(errors.Wrap(err, "unable to close event response body"))
}()
}
dec := json.NewDecoder(response.Body)
for {
e := handlers.Event{}
if err := dec.Decode(&e); err != nil {
if err == io.EOF {
break
}
return errors.Wrap(err, "unable to decode event response")
}
eventChan <- e
}
return nil
}
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