mirror of https://github.com/containers/podman.git
119 lines
2.8 KiB
Go
119 lines
2.8 KiB
Go
package compat
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import (
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"encoding/json"
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"fmt"
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"net/http"
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"strings"
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"time"
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"github.com/containers/podman/v5/libpod"
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"github.com/containers/podman/v5/pkg/api/handlers"
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"github.com/containers/podman/v5/pkg/api/handlers/utils"
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api "github.com/containers/podman/v5/pkg/api/types"
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"github.com/sirupsen/logrus"
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)
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func TopContainer(w http.ResponseWriter, r *http.Request) {
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runtime := r.Context().Value(api.RuntimeKey).(*libpod.Runtime)
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decoder := utils.GetDecoder(r)
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var psArgs []string
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if !utils.IsLibpodRequest(r) {
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psArgs = []string{"-ef"}
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}
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query := struct {
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Delay int `schema:"delay"`
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PsArgs []string `schema:"ps_args"`
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Stream bool `schema:"stream"`
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}{
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Delay: 5,
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PsArgs: psArgs,
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}
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if err := decoder.Decode(&query, r.URL.Query()); err != nil {
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utils.Error(w, http.StatusBadRequest, fmt.Errorf("failed to parse parameters for %s: %w", r.URL.String(), err))
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return
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}
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if query.Delay < 1 {
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utils.Error(w, http.StatusBadRequest, fmt.Errorf("\"delay\" parameter of value %d < 1", query.Delay))
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return
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}
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name := utils.GetName(r)
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c, err := runtime.LookupContainer(name)
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if err != nil {
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utils.ContainerNotFound(w, name, err)
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return
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}
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statusWritten := false
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w.Header().Set("Content-Type", "application/json")
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encoder := json.NewEncoder(w)
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args := query.PsArgs
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if len(args) == 1 &&
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utils.IsLibpodRequest(r) {
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if _, err := utils.SupportedVersion(r, "< 4.8.0"); err == nil {
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// Ugly workaround for older clients which used to send arguments comma separated.
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args = strings.Split(args[0], ",")
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}
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}
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loop: // break out of for/select infinite` loop
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for {
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select {
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case <-r.Context().Done():
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break loop
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default:
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output, err := c.Top(args)
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if err != nil {
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if !statusWritten {
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utils.InternalServerError(w, err)
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} else {
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logrus.Errorf("From %s %q : %v", r.Method, r.URL, err)
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}
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break loop
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}
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if len(output) > 0 {
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body := handlers.ContainerTopOKBody{}
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body.Titles = utils.PSTitles(output[0])
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for i := range body.Titles {
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body.Titles[i] = strings.TrimSpace(body.Titles[i])
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}
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for _, line := range output[1:] {
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process := strings.Split(line, "\t")
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for i := range process {
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process[i] = strings.TrimSpace(process[i])
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}
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body.Processes = append(body.Processes, process)
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}
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if err := encoder.Encode(body); err != nil {
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if !statusWritten {
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utils.InternalServerError(w, err)
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} else {
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logrus.Errorf("From %s %q : %v", r.Method, r.URL, err)
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}
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break loop
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}
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// after the first write we can no longer send a different status code
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statusWritten = true
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if f, ok := w.(http.Flusher); ok {
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f.Flush()
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}
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}
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if query.Stream {
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time.Sleep(time.Duration(query.Delay) * time.Second)
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} else {
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break loop
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}
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}
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}
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}
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