package libpod import ( "context" "encoding/json" "net/http" "github.com/containers/common/libimage" "github.com/containers/common/pkg/config" "github.com/containers/image/v5/types" "github.com/containers/podman/v3/libpod" "github.com/containers/podman/v3/pkg/api/handlers/utils" "github.com/containers/podman/v3/pkg/auth" "github.com/containers/podman/v3/pkg/channel" "github.com/containers/podman/v3/pkg/domain/entities" "github.com/gorilla/schema" "github.com/pkg/errors" "github.com/sirupsen/logrus" ) // ImagesPull is the v2 libpod endpoint for pulling images. Note that the // mandatory `reference` must be a reference to a registry (i.e., of docker // transport or be normalized to one). Other transports are rejected as they // do not make sense in a remote context. func ImagesPull(w http.ResponseWriter, r *http.Request) { runtime := r.Context().Value("runtime").(*libpod.Runtime) decoder := r.Context().Value("decoder").(*schema.Decoder) query := struct { Reference string `schema:"reference"` OS string `schema:"OS"` Arch string `schema:"Arch"` Variant string `schema:"Variant"` TLSVerify bool `schema:"tlsVerify"` AllTags bool `schema:"allTags"` PullPolicy string `schema:"policy"` }{ TLSVerify: true, PullPolicy: "always", } 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 len(query.Reference) == 0 { utils.InternalServerError(w, errors.New("reference parameter cannot be empty")) return } // Make sure that the reference has no transport or the docker one. if err := utils.IsRegistryReference(query.Reference); err != nil { utils.Error(w, http.StatusText(http.StatusBadRequest), http.StatusBadRequest, err) return } pullOptions := &libimage.PullOptions{} pullOptions.AllTags = query.AllTags pullOptions.Architecture = query.Arch pullOptions.OS = query.OS pullOptions.Variant = query.Variant if _, found := r.URL.Query()["tlsVerify"]; found { pullOptions.InsecureSkipTLSVerify = types.NewOptionalBool(!query.TLSVerify) } // Do the auth dance. authConf, authfile, key, err := auth.GetCredentials(r) if err != nil { utils.Error(w, "failed to retrieve repository credentials", http.StatusBadRequest, errors.Wrapf(err, "failed to parse %q header for %s", key, r.URL.String())) return } defer auth.RemoveAuthfile(authfile) pullOptions.AuthFilePath = authfile if authConf != nil { pullOptions.Username = authConf.Username pullOptions.Password = authConf.Password pullOptions.IdentityToken = authConf.IdentityToken } writer := channel.NewWriter(make(chan []byte)) defer writer.Close() pullOptions.Writer = writer pullPolicy, err := config.ParsePullPolicy(query.PullPolicy) if err != nil { utils.Error(w, "failed to parse pull policy", http.StatusBadRequest, err) return } var pulledImages []*libimage.Image var pullError error runCtx, cancel := context.WithCancel(r.Context()) go func() { defer cancel() pulledImages, pullError = runtime.LibimageRuntime().Pull(runCtx, query.Reference, pullPolicy, pullOptions) }() flush := func() { if flusher, ok := w.(http.Flusher); ok { flusher.Flush() } } w.WriteHeader(http.StatusOK) w.Header().Add("Content-Type", "application/json") flush() enc := json.NewEncoder(w) enc.SetEscapeHTML(true) for { var report entities.ImagePullReport select { case s := <-writer.Chan(): report.Stream = string(s) if err := enc.Encode(report); err != nil { logrus.Warnf("Failed to encode json: %v", err) } flush() case <-runCtx.Done(): for _, image := range pulledImages { report.Images = append(report.Images, image.ID()) // Pull last ID from list and publish in 'id' stanza. This maintains previous API contract report.ID = image.ID() } if pullError != nil { report.Error = pullError.Error() } if err := enc.Encode(report); err != nil { logrus.Warnf("Failed to encode json: %v", err) } flush() return case <-r.Context().Done(): // Client has closed connection return } } }