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Directly manage layerUploadState in webapp

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Most of this change follows from the modifications to the storage api. The
driving factor is the separation of layerUploadState from the storage backend,
leaving it to the web application to store and update it. As part of the
updates to meet changes in the storage api, support for the size parameter has
been completely removed.

Signed-off-by: Stephen J Day <stephen.day@docker.com>
This commit is contained in:
Stephen J Day 2015-01-08 15:04:00 -08:00
parent fdcfc56f7b
commit cd92071caa
2 changed files with 67 additions and 33 deletions
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4
docs/app.go
View file

@ -29,8 +29,6 @@ type App struct {
// services contains the main services instance for the application.
services *storage.Services
tokenProvider tokenProvider
layerHandler storage.LayerHandler
accessController auth.AccessController
@ -66,8 +64,6 @@ func NewApp(configuration configuration.Configuration) *App {
app.driver = driver
app.services = storage.NewServices(app.driver)
app.tokenProvider = newHMACTokenProvider(configuration.HTTP.Secret)
authType := configuration.Auth.Type()
if authType != "" {

96
docs/layerupload.go
View file

@ -5,7 +5,7 @@ import (
"io"
"net/http"
"net/url"
"strconv"
"os"
"github.com/Sirupsen/logrus"
"github.com/docker/distribution/api/v2"
@ -33,26 +33,57 @@ func layerUploadDispatcher(ctx *Context, r *http.Request) http.Handler {
if luh.UUID != "" {
luh.log = luh.log.WithField("uuid", luh.UUID)
state, err := ctx.tokenProvider.layerUploadStateFromToken(r.FormValue("_state"))
state, err := hmacKey(ctx.Config.HTTP.Secret).unpackUploadState(r.FormValue("_state"))
if err != nil {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
logrus.Infof("error resolving upload: %v", err)
w.WriteHeader(http.StatusInternalServerError)
luh.Errors.Push(v2.ErrorCodeUnknown, err)
ctx.log.Infof("error resolving upload: %v", err)
w.WriteHeader(http.StatusBadRequest)
luh.Errors.Push(v2.ErrorCodeBlobUploadInvalid, err)
})
}
luh.State = state
if state.UUID != luh.UUID {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
ctx.log.Infof("mismatched uuid in upload state: %q != %q", state.UUID, luh.UUID)
w.WriteHeader(http.StatusBadRequest)
luh.Errors.Push(v2.ErrorCodeBlobUploadInvalid, err)
})
}
layers := ctx.services.Layers()
upload, err := layers.Resume(state)
upload, err := layers.Resume(luh.Name, luh.UUID)
if err != nil && err != storage.ErrLayerUploadUnknown {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
logrus.Infof("error resolving upload: %v", err)
w.WriteHeader(http.StatusInternalServerError)
luh.Errors.Push(v2.ErrorCodeUnknown, err)
ctx.log.Errorf("error resolving upload: %v", err)
w.WriteHeader(http.StatusBadRequest)
luh.Errors.Push(v2.ErrorCodeBlobUploadUnknown, err)
})
}
luh.Upload = upload
if state.Offset > 0 {
// Seek the layer upload to the correct spot if it's non-zero.
// These error conditions should be rare and demonstrate really
// problems. We basically cancel the upload and tell the client to
// start over.
if nn, err := upload.Seek(luh.State.Offset, os.SEEK_SET); err != nil {
ctx.log.Infof("error seeking layer upload: %v", err)
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(http.StatusBadRequest)
luh.Errors.Push(v2.ErrorCodeBlobUploadInvalid, err)
upload.Cancel()
})
} else if nn != luh.State.Offset {
ctx.log.Infof("seek to wrong offest: %d != %d", nn, luh.State.Offset)
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(http.StatusBadRequest)
luh.Errors.Push(v2.ErrorCodeBlobUploadInvalid, err)
upload.Cancel()
})
}
}
handler = closeResources(handler, luh.Upload)
}
@ -67,6 +98,8 @@ type layerUploadHandler struct {
UUID string
Upload storage.LayerUpload
State layerUploadState
}
// StartLayerUpload begins the layer upload process and allocates a server-
@ -171,14 +204,30 @@ func (luh *layerUploadHandler) CancelLayerUpload(w http.ResponseWriter, r *http.
// chunk responses. This sets the correct headers but the response status is
// left to the caller.
func (luh *layerUploadHandler) layerUploadResponse(w http.ResponseWriter, r *http.Request) error {
values := make(url.Values)
stateToken, err := luh.Context.tokenProvider.layerUploadStateToToken(storage.LayerUploadState{Name: luh.Upload.Name(), UUID: luh.Upload.UUID(), Offset: luh.Upload.Offset()})
offset, err := luh.Upload.Seek(0, os.SEEK_CUR)
if err != nil {
luh.log.Errorf("unable get current offset of layer upload: %v", err)
return err
}
// TODO(stevvooe): Need a better way to manage the upload state automatically.
luh.State.Name = luh.Name
luh.State.UUID = luh.Upload.UUID()
luh.State.Offset = offset
luh.State.StartedAt = luh.Upload.StartedAt()
token, err := hmacKey(luh.Config.HTTP.Secret).packUploadState(luh.State)
if err != nil {
logrus.Infof("error building upload state token: %s", err)
return err
}
values.Set("_state", stateToken)
uploadURL, err := luh.urlBuilder.BuildBlobUploadChunkURL(luh.Upload.Name(), luh.Upload.UUID(), values)
uploadURL, err := luh.urlBuilder.BuildBlobUploadChunkURL(
luh.Upload.Name(), luh.Upload.UUID(),
url.Values{
"_state": []string{token},
})
if err != nil {
logrus.Infof("error building upload url: %s", err)
return err
@ -186,7 +235,7 @@ func (luh *layerUploadHandler) layerUploadResponse(w http.ResponseWriter, r *htt
w.Header().Set("Location", uploadURL)
w.Header().Set("Content-Length", "0")
w.Header().Set("Range", fmt.Sprintf("0-%d", luh.Upload.Offset()))
w.Header().Set("Range", fmt.Sprintf("0-%d", luh.State.Offset))
return nil
}
@ -198,7 +247,6 @@ var errNotReadyToComplete = fmt.Errorf("not ready to complete upload")
func (luh *layerUploadHandler) maybeCompleteUpload(w http.ResponseWriter, r *http.Request) error {
// If we get a digest and length, we can finish the upload.
dgstStr := r.FormValue("digest") // TODO(stevvooe): Support multiple digest parameters!
sizeStr := r.FormValue("size")
if dgstStr == "" {
return errNotReadyToComplete
@ -209,23 +257,13 @@ func (luh *layerUploadHandler) maybeCompleteUpload(w http.ResponseWriter, r *htt
return err
}
var size int64
if sizeStr != "" {
size, err = strconv.ParseInt(sizeStr, 10, 64)
if err != nil {
return err
}
} else {
size = -1
}
luh.completeUpload(w, r, size, dgst)
luh.completeUpload(w, r, dgst)
return nil
}
// completeUpload finishes out the upload with the correct response.
func (luh *layerUploadHandler) completeUpload(w http.ResponseWriter, r *http.Request, size int64, dgst digest.Digest) {
layer, err := luh.Upload.Finish(size, dgst)
func (luh *layerUploadHandler) completeUpload(w http.ResponseWriter, r *http.Request, dgst digest.Digest) {
layer, err := luh.Upload.Finish(dgst)
if err != nil {
luh.Errors.Push(v2.ErrorCodeUnknown, err)
w.WriteHeader(http.StatusInternalServerError)