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package compat
import (
"encoding/json"
"fmt"
"net/http"
"strings"
"time"
"github.com/containers/podman/v3/libpod"
"github.com/containers/podman/v3/pkg/api/handlers"
"github.com/containers/podman/v3/pkg/api/handlers/utils"
api "github.com/containers/podman/v3/pkg/api/types"
"github.com/gorilla/schema"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
func TopContainer(w http.ResponseWriter, r *http.Request) {
runtime := r.Context().Value(api.RuntimeKey).(*libpod.Runtime)
decoder := r.Context().Value(api.DecoderKey).(*schema.Decoder)
psArgs := "-ef"
if utils.IsLibpodRequest(r) {
psArgs = ""
}
query := struct {
Delay int `schema:"delay"`
PsArgs string `schema:"ps_args"`
Stream bool `schema:"stream"`
}{
Delay: 5,
PsArgs: psArgs,
}
if err := decoder.Decode(&query, r.URL.Query()); err != nil {
utils.Error(w, http.StatusText(http.StatusBadRequest), http.StatusBadRequest,
errors.Wrapf(err, "failed to parse parameters for %s", r.URL.String()))
return
}
if query.Delay < 1 {
utils.Error(w, http.StatusText(http.StatusBadRequest), http.StatusBadRequest,
fmt.Errorf("\"delay\" parameter of value %d < 1", query.Delay))
return
}
name := utils.GetName(r)
c, err := runtime.LookupContainer(name)
if err != nil {
utils.ContainerNotFound(w, name, err)
return
}
// We are committed now - all errors logged but not reported to client, ship has sailed
w.WriteHeader(http.StatusOK)
w.Header().Set("Content-Type", "application/json")
if f, ok := w.(http.Flusher); ok {
f.Flush()
}
encoder := json.NewEncoder(w)
loop: // break out of for/select infinite` loop
for {
select {
case <-r.Context().Done():
break loop
default:
output, err := c.Top([]string{query.PsArgs})
if err != nil {
logrus.Infof("Error from %s %q : %v", r.Method, r.URL, err)
break loop
}
if len(output) > 0 {
body := handlers.ContainerTopOKBody{}
body.Titles = strings.Split(output[0], "\t")
for i := range body.Titles {
body.Titles[i] = strings.TrimSpace(body.Titles[i])
}
for _, line := range output[1:] {
process := strings.Split(line, "\t")
for i := range process {
process[i] = strings.TrimSpace(process[i])
}
body.Processes = append(body.Processes, process)
}
if err := encoder.Encode(body); err != nil {
logrus.Infof("Error from %s %q : %v", r.Method, r.URL, err)
break loop
}
if f, ok := w.(http.Flusher); ok {
f.Flush()
}
}
if query.Stream {
time.Sleep(time.Duration(query.Delay) * time.Second)
} else {
break loop
}
}
}
}
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