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admin.go
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admin.go
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package server
import (
"fmt"
"net/http"
"github.com/docker/distribution"
"github.com/docker/distribution/context"
ctxu "github.com/docker/distribution/context"
"github.com/docker/distribution/digest"
"github.com/docker/distribution/registry/api/errcode"
"github.com/docker/distribution/registry/api/v2"
"github.com/docker/distribution/registry/handlers"
"github.com/docker/distribution/registry/storage"
storagedriver "github.com/docker/distribution/registry/storage/driver"
gorillahandlers "github.com/gorilla/handlers"
)
// BlobDispatcher takes the request context and builds the appropriate handler
// for handling blob requests.
func BlobDispatcher(ctx *handlers.Context, r *http.Request) http.Handler {
reference := ctxu.GetStringValue(ctx, "vars.digest")
dgst, _ := digest.ParseDigest(reference)
blobHandler := &blobHandler{
Context: ctx,
Digest: dgst,
}
return gorillahandlers.MethodHandler{
"DELETE": http.HandlerFunc(blobHandler.Delete),
}
}
// blobHandler handles http operations on blobs.
type blobHandler struct {
*handlers.Context
Digest digest.Digest
}
// Delete deletes the blob from the storage backend.
func (bh *blobHandler) Delete(w http.ResponseWriter, req *http.Request) {
defer req.Body.Close()
if len(bh.Digest) == 0 {
bh.Errors = append(bh.Errors, v2.ErrorCodeBlobUnknown)
return
}
bd, err := storage.RegistryBlobDeleter(bh.Namespace())
if err != nil {
bh.Errors = append(bh.Errors, errcode.ErrorCodeUnknown.WithDetail(err))
return
}
err = bd.Delete(bh, bh.Digest)
if err != nil {
// ignore not found error
switch t := err.(type) {
case storagedriver.PathNotFoundError:
case errcode.Error:
if t.Code != v2.ErrorCodeBlobUnknown {
bh.Errors = append(bh.Errors, err)
return
}
default:
if err != distribution.ErrBlobUnknown {
detail := fmt.Sprintf("error deleting blob %q: %v", bh.Digest, err)
err = errcode.ErrorCodeUnknown.WithDetail(detail)
bh.Errors = append(bh.Errors, err)
return
}
}
context.GetLogger(bh).Infof("blobHandler: ignoring %T error: %v", err, err)
}
w.WriteHeader(http.StatusNoContent)
}