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images.go
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images.go
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package main
import (
"context"
"html/template"
"net/http"
"sort"
"strings"
"sync"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/filters"
"github.com/gorilla/mux"
"github.com/sirupsen/logrus"
log "github.com/sirupsen/logrus"
)
func (s *Server) handleImages() http.HandlerFunc {
var (
init sync.Once
tpl *template.Template
err error
)
type image struct {
ID string
Name string
Created int
Size int
}
return func(w http.ResponseWriter, r *http.Request) {
init.Do(func() {
tpl, err = s.parseTemplate("images.html")
})
if err != nil {
logrus.Error(err)
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
images, err := s.docker.ImageList(context.Background(), types.ImageListOptions{})
if err != nil {
logrus.Error("Docker images list", err)
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
imagesResponse := make([]image, len(images))
for index, img := range images {
imagesResponse[index] = image{
ID: img.ID,
Name: "None",
Created: int(img.Created),
Size: int(img.Size),
}
if len(img.RepoTags) > 0 {
imagesResponse[index].Name = img.RepoTags[0]
}
}
sort.Slice(imagesResponse, func(i, j int) bool { return imagesResponse[i].Name < imagesResponse[j].Name })
err = tpl.ExecuteTemplate(w, "images.html", imagesResponse)
if err != nil {
logrus.Error(err)
}
}
}
func (s *Server) handleImage() http.HandlerFunc {
var (
init sync.Once
tpl *template.Template
err error
)
type imageResponse struct {
Name string
Parent string
Comment string
Created string
Container string
DockerVersion string
Author string
Config string
Architecture string
Os string
OsVersion string
Size int
ConfigUser string
ConfigExposedPorts []string
ConfigEnv []string
ConfigEntrypoint string
ConfigCmd string
ConfigVolumes []string
ConfigLabels map[string]string
}
return func(w http.ResponseWriter, r *http.Request) {
init.Do(func() {
tpl, err = s.parseTemplate("image.html")
})
if err != nil {
logrus.Error(err)
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
imageID := mux.Vars(r)["id"]
image, _, err := s.docker.ImageInspectWithRaw(context.Background(), imageID)
if err != nil {
logrus.Error(err)
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
response := imageResponse{
Name: strings.Join(image.RepoTags, ""),
Parent: image.Parent,
Comment: image.Comment,
Created: image.Created,
Container: image.Container,
DockerVersion: image.DockerVersion,
Author: image.Author,
Architecture: image.Architecture,
Os: image.Os,
OsVersion: image.OsVersion,
Size: int(image.Size),
ConfigUser: image.Config.User,
ConfigEnv: image.Config.Env,
ConfigEntrypoint: strings.Join(image.Config.Entrypoint, " "),
ConfigCmd: strings.Join(image.Config.Cmd, " "),
ConfigLabels: image.Config.Labels,
}
for port := range image.Config.ExposedPorts {
response.ConfigExposedPorts = append(response.ConfigExposedPorts, string(port))
}
for volume := range image.Config.Volumes {
response.ConfigVolumes = append(response.ConfigVolumes, volume)
}
err = tpl.ExecuteTemplate(w, "image.html", response)
if err != nil {
logrus.Error(err)
}
}
}
func (s *Server) handleImagesClean() http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
ctx := r.Context()
images, err := s.docker.ImageList(ctx, types.ImageListOptions{
Filters: filters.NewArgs(filters.Arg("dangling", "true")),
})
if err != nil && err != context.Canceled {
logrus.Error("Docker images list", err)
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
for _, image := range images {
_, err := s.docker.ImageRemove(
ctx,
image.ID,
types.ImageRemoveOptions{PruneChildren: true},
)
if err != nil && err != context.Canceled {
log.Error(err)
}
}
w.WriteHeader(http.StatusOK)
}
}