forked from TrueCloudLab/distribution
c9bb330b71
Add "readonly" under the storage/maintenance section. When this is set to true, uploads and deletions will return 503 Service Unavailable errors. Document the parameter and add some unit testing. Signed-off-by: Aaron Lehmann <aaron.lehmann@docker.com>
94 lines
2.6 KiB
Go
94 lines
2.6 KiB
Go
package handlers
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import (
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"net/http"
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"github.com/docker/distribution"
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"github.com/docker/distribution/context"
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"github.com/docker/distribution/digest"
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"github.com/docker/distribution/registry/api/errcode"
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"github.com/docker/distribution/registry/api/v2"
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"github.com/gorilla/handlers"
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)
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// blobDispatcher uses the request context to build a blobHandler.
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func blobDispatcher(ctx *Context, r *http.Request) http.Handler {
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dgst, err := getDigest(ctx)
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if err != nil {
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if err == errDigestNotAvailable {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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ctx.Errors = append(ctx.Errors, v2.ErrorCodeDigestInvalid.WithDetail(err))
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})
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}
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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ctx.Errors = append(ctx.Errors, v2.ErrorCodeDigestInvalid.WithDetail(err))
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})
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}
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blobHandler := &blobHandler{
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Context: ctx,
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Digest: dgst,
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}
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return handlers.MethodHandler{
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"GET": http.HandlerFunc(blobHandler.GetBlob),
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"HEAD": http.HandlerFunc(blobHandler.GetBlob),
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"DELETE": mutableHandler(blobHandler.DeleteBlob, ctx),
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}
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}
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// blobHandler serves http blob requests.
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type blobHandler struct {
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*Context
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Digest digest.Digest
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}
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// GetBlob fetches the binary data from backend storage returns it in the
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// response.
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func (bh *blobHandler) GetBlob(w http.ResponseWriter, r *http.Request) {
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context.GetLogger(bh).Debug("GetBlob")
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blobs := bh.Repository.Blobs(bh)
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desc, err := blobs.Stat(bh, bh.Digest)
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if err != nil {
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if err == distribution.ErrBlobUnknown {
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bh.Errors = append(bh.Errors, v2.ErrorCodeBlobUnknown.WithDetail(bh.Digest))
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} else {
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bh.Errors = append(bh.Errors, errcode.ErrorCodeUnknown.WithDetail(err))
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}
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return
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}
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if err := blobs.ServeBlob(bh, w, r, desc.Digest); err != nil {
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context.GetLogger(bh).Debugf("unexpected error getting blob HTTP handler: %v", err)
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bh.Errors = append(bh.Errors, errcode.ErrorCodeUnknown.WithDetail(err))
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return
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}
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}
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// DeleteBlob deletes a layer blob
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func (bh *blobHandler) DeleteBlob(w http.ResponseWriter, r *http.Request) {
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context.GetLogger(bh).Debug("DeleteBlob")
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blobs := bh.Repository.Blobs(bh)
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err := blobs.Delete(bh, bh.Digest)
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if err != nil {
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switch err {
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case distribution.ErrUnsupported:
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bh.Errors = append(bh.Errors, errcode.ErrorCodeUnsupported)
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return
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case distribution.ErrBlobUnknown:
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bh.Errors = append(bh.Errors, v2.ErrorCodeBlobUnknown)
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return
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default:
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bh.Errors = append(bh.Errors, err)
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context.GetLogger(bh).Errorf("Unknown error deleting blob: %s", err.Error())
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return
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}
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}
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w.Header().Set("Content-Length", "0")
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w.WriteHeader(http.StatusAccepted)
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}
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