distribution/images.go

93 lines
2.8 KiB
Go

package registry
import (
"net/http"
"github.com/gorilla/handlers"
)
// ImageManifest defines the structure of an image manifest
type ImageManifest struct {
// Name is the name of the image's repository
Name string `json:"name"`
// Tag is the tag of the image specified by this manifest
Tag string `json:"tag"`
// Architecture is the host architecture on which this image is intended to
// run
Architecture string `json:"architecture"`
// FSLayers is a list of filesystem layer blobSums contained in this image
FSLayers []FSLayer `json:"fsLayers"`
// History is a list of unstructured historical data for v1 compatibility
History []ManifestHistory `json:"history"`
// Signature is the JWT with which the image is signed
Signature string `json:"signature,omitempty"`
// SchemaVersion is the image manifest schema that this image follows
SchemaVersion int `json:"schemaVersion"`
}
// FSLayer is a container struct for BlobSums defined in an image manifest
type FSLayer struct {
// BlobSum is the tarsum of the referenced filesystem image layer
BlobSum string `json:"blobSum"`
}
// ManifestHistory stores unstructured v1 compatibility information
type ManifestHistory struct {
// V1Compatibility is the raw v1 compatibility information
V1Compatibility string `json:"v1Compatibility"`
}
// Checksum is a container struct for an image checksum
type Checksum struct {
// HashAlgorithm is the algorithm used to compute the checksum
// Supported values: md5, sha1, sha256, sha512
HashAlgorithm string
// Sum is the actual checksum value for the given HashAlgorithm
Sum string
}
// imageManifestDispatcher takes the request context and builds the
// appropriate handler for handling image manifest requests.
func imageManifestDispatcher(ctx *Context, r *http.Request) http.Handler {
imageManifestHandler := &imageManifestHandler{
Context: ctx,
Tag: ctx.vars["tag"],
}
imageManifestHandler.log = imageManifestHandler.log.WithField("tag", imageManifestHandler.Tag)
return handlers.MethodHandler{
"GET": http.HandlerFunc(imageManifestHandler.GetImageManifest),
"PUT": http.HandlerFunc(imageManifestHandler.PutImageManifest),
"DELETE": http.HandlerFunc(imageManifestHandler.DeleteImageManifest),
}
}
// imageManifestHandler handles http operations on image manifests.
type imageManifestHandler struct {
*Context
Tag string
}
// GetImageManifest fetches the image manifest from the storage backend, if it exists.
func (imh *imageManifestHandler) GetImageManifest(w http.ResponseWriter, r *http.Request) {
}
// PutImageManifest validates and stores and image in the registry.
func (imh *imageManifestHandler) PutImageManifest(w http.ResponseWriter, r *http.Request) {
}
// DeleteImageManifest removes the image with the given tag from the registry.
func (imh *imageManifestHandler) DeleteImageManifest(w http.ResponseWriter, r *http.Request) {
}