// GetResource returns a function that handles retrieving a single resource from a rest.Storage object.
func GetResource(r rest.Getter, e rest.Exporter, scope RequestScope) restful.RouteFunction {
return getResourceHandler(scope,
func(ctx api.Context, name string, req *restful.Request) (runtime.Object, error) {
// For performance tracking purposes.
trace := util.NewTrace("Get " + req.Request.URL.Path)
defer trace.LogIfLong(250 * time.Millisecond)
// check for export
if values := req.Request.URL.Query(); len(values) > 0 {
// TODO: this is internal version, not unversioned
exports := unversioned.ExportOptions{}
if err := scope.ParameterCodec.DecodeParameters(values, unversioned.GroupVersion{Version: "v1"}, &exports); err != nil {
return nil, err
}
if exports.Export {
if e == nil {
return nil, errors.NewBadRequest(fmt.Sprintf("export of %q is not supported", scope.Resource.Resource))
}
return e.Export(ctx, name, exports)
}
}
return r.Get(ctx, name)
})
}
// DeleteResource returns a function that will handle a resource deletion
func DeleteResource(r rest.GracefulDeleter, checkBody bool, scope RequestScope, admit admission.Interface) restful.RouteFunction {
return func(req *restful.Request, res *restful.Response) {
// For performance tracking purposes.
trace := util.NewTrace("Delete " + req.Request.URL.Path)
defer trace.LogIfLong(250 * time.Millisecond)
w := res.ResponseWriter
// TODO: we either want to remove timeout or document it (if we document, move timeout out of this function and declare it in api_installer)
timeout := parseTimeout(req.Request.URL.Query().Get("timeout"))
namespace, name, err := scope.Namer.Name(req)
if err != nil {
scope.err(err, res.ResponseWriter, req.Request)
return
}
ctx := scope.ContextFunc(req)
ctx = api.WithNamespace(ctx, namespace)
options := &api.DeleteOptions{}
if checkBody {
body, err := readBody(req.Request)
if err != nil {
scope.err(err, res.ResponseWriter, req.Request)
return
}
if len(body) > 0 {
s, err := negotiateInputSerializer(req.Request, scope.Serializer)
if err != nil {
scope.err(err, res.ResponseWriter, req.Request)
return
}
defaultGVK := scope.Kind.GroupVersion().WithKind("DeleteOptions")
obj, _, err := scope.Serializer.DecoderToVersion(s, defaultGVK.GroupVersion()).Decode(body, &defaultGVK, options)
if err != nil {
scope.err(err, res.ResponseWriter, req.Request)
return
}
if obj != options {
scope.err(fmt.Errorf("decoded object cannot be converted to DeleteOptions"), res.ResponseWriter, req.Request)
return
}
}
}
if admit != nil && admit.Handles(admission.Delete) {
userInfo, _ := api.UserFrom(ctx)
err = admit.Admit(admission.NewAttributesRecord(nil, nil, scope.Kind, namespace, name, scope.Resource, scope.Subresource, admission.Delete, userInfo))
if err != nil {
scope.err(err, res.ResponseWriter, req.Request)
return
}
}
trace.Step("About do delete object from database")
result, err := finishRequest(timeout, func() (runtime.Object, error) {
return r.Delete(ctx, name, options)
})
if err != nil {
scope.err(err, res.ResponseWriter, req.Request)
return
}
trace.Step("Object deleted from database")
// if the rest.Deleter returns a nil object, fill out a status. Callers may return a valid
// object with the response.
if result == nil {
result = &unversioned.Status{
Status: unversioned.StatusSuccess,
Code: http.StatusOK,
Details: &unversioned.StatusDetails{
Name: name,
Kind: scope.Kind.Kind,
},
}
} else {
// when a non-status response is returned, set the self link
if _, ok := result.(*unversioned.Status); !ok {
if err := setSelfLink(result, req, scope.Namer); err != nil {
scope.err(err, res.ResponseWriter, req.Request)
return
}
}
}
write(http.StatusOK, scope.Kind.GroupVersion(), scope.Serializer, result, w, req.Request)
}
}
// UpdateResource returns a function that will handle a resource update
func UpdateResource(r rest.Updater, scope RequestScope, typer runtime.ObjectTyper, admit admission.Interface) restful.RouteFunction {
return func(req *restful.Request, res *restful.Response) {
// For performance tracking purposes.
trace := util.NewTrace("Update " + req.Request.URL.Path)
defer trace.LogIfLong(250 * time.Millisecond)
w := res.ResponseWriter
// TODO: we either want to remove timeout or document it (if we document, move timeout out of this function and declare it in api_installer)
timeout := parseTimeout(req.Request.URL.Query().Get("timeout"))
namespace, name, err := scope.Namer.Name(req)
if err != nil {
scope.err(err, res.ResponseWriter, req.Request)
return
}
ctx := scope.ContextFunc(req)
ctx = api.WithNamespace(ctx, namespace)
body, err := readBody(req.Request)
if err != nil {
scope.err(err, res.ResponseWriter, req.Request)
return
}
s, err := negotiateInputSerializer(req.Request, scope.Serializer)
if err != nil {
scope.err(err, res.ResponseWriter, req.Request)
return
}
defaultGVK := scope.Kind
original := r.New()
trace.Step("About to convert to expected version")
obj, gvk, err := scope.Serializer.DecoderToVersion(s, defaultGVK.GroupVersion()).Decode(body, &defaultGVK, original)
if err != nil {
err = transformDecodeError(typer, err, original, gvk, body)
scope.err(err, res.ResponseWriter, req.Request)
return
}
if gvk.GroupVersion() != defaultGVK.GroupVersion() {
err = errors.NewBadRequest(fmt.Sprintf("the API version in the data (%s) does not match the expected API version (%s)", gvk.GroupVersion(), defaultGVK.GroupVersion()))
scope.err(err, res.ResponseWriter, req.Request)
return
}
trace.Step("Conversion done")
if err := checkName(obj, name, namespace, scope.Namer); err != nil {
scope.err(err, res.ResponseWriter, req.Request)
return
}
var transformers []rest.TransformFunc
if admit != nil && admit.Handles(admission.Update) {
transformers = append(transformers, func(ctx api.Context, newObj, oldObj runtime.Object) (runtime.Object, error) {
userInfo, _ := api.UserFrom(ctx)
return newObj, admit.Admit(admission.NewAttributesRecord(newObj, oldObj, scope.Kind, namespace, name, scope.Resource, scope.Subresource, admission.Update, userInfo))
})
}
trace.Step("About to store object in database")
wasCreated := false
result, err := finishRequest(timeout, func() (runtime.Object, error) {
obj, created, err := r.Update(ctx, name, rest.DefaultUpdatedObjectInfo(obj, scope.Copier, transformers...))
wasCreated = created
return obj, err
})
if err != nil {
scope.err(err, res.ResponseWriter, req.Request)
return
}
trace.Step("Object stored in database")
if err := setSelfLink(result, req, scope.Namer); err != nil {
scope.err(err, res.ResponseWriter, req.Request)
return
}
trace.Step("Self-link added")
status := http.StatusOK
if wasCreated {
status = http.StatusCreated
}
write(status, scope.Kind.GroupVersion(), scope.Serializer, result, w, req.Request)
}
}
func createHandler(r rest.NamedCreater, scope RequestScope, typer runtime.ObjectTyper, admit admission.Interface, includeName bool) restful.RouteFunction {
return func(req *restful.Request, res *restful.Response) {
// For performance tracking purposes.
trace := util.NewTrace("Create " + req.Request.URL.Path)
defer trace.LogIfLong(250 * time.Millisecond)
w := res.ResponseWriter
// TODO: we either want to remove timeout or document it (if we document, move timeout out of this function and declare it in api_installer)
timeout := parseTimeout(req.Request.URL.Query().Get("timeout"))
var (
namespace, name string
err error
)
if includeName {
namespace, name, err = scope.Namer.Name(req)
} else {
namespace, err = scope.Namer.Namespace(req)
}
if err != nil {
scope.err(err, res.ResponseWriter, req.Request)
return
}
ctx := scope.ContextFunc(req)
ctx = api.WithNamespace(ctx, namespace)
gv := scope.Kind.GroupVersion()
s, err := negotiateInputSerializer(req.Request, scope.Serializer)
if err != nil {
scope.err(err, res.ResponseWriter, req.Request)
return
}
decoder := scope.Serializer.DecoderToVersion(s, unversioned.GroupVersion{Group: gv.Group, Version: runtime.APIVersionInternal})
body, err := readBody(req.Request)
if err != nil {
scope.err(err, res.ResponseWriter, req.Request)
return
}
defaultGVK := scope.Kind
original := r.New()
trace.Step("About to convert to expected version")
obj, gvk, err := decoder.Decode(body, &defaultGVK, original)
if err != nil {
err = transformDecodeError(typer, err, original, gvk, body)
scope.err(err, res.ResponseWriter, req.Request)
return
}
if gvk.GroupVersion() != gv {
err = errors.NewBadRequest(fmt.Sprintf("the API version in the data (%s) does not match the expected API version (%v)", gvk.GroupVersion().String(), gv.String()))
scope.err(err, res.ResponseWriter, req.Request)
return
}
trace.Step("Conversion done")
if admit != nil && admit.Handles(admission.Create) {
userInfo, _ := api.UserFrom(ctx)
err = admit.Admit(admission.NewAttributesRecord(obj, nil, scope.Kind, namespace, name, scope.Resource, scope.Subresource, admission.Create, userInfo))
if err != nil {
scope.err(err, res.ResponseWriter, req.Request)
return
}
}
trace.Step("About to store object in database")
result, err := finishRequest(timeout, func() (runtime.Object, error) {
out, err := r.Create(ctx, name, obj)
if status, ok := out.(*unversioned.Status); ok && err == nil && status.Code == 0 {
status.Code = http.StatusCreated
}
return out, err
})
if err != nil {
scope.err(err, res.ResponseWriter, req.Request)
return
}
trace.Step("Object stored in database")
if err := setSelfLink(result, req, scope.Namer); err != nil {
scope.err(err, res.ResponseWriter, req.Request)
return
}
trace.Step("Self-link added")
write(http.StatusCreated, scope.Kind.GroupVersion(), scope.Serializer, result, w, req.Request)
}
}
// ListResource returns a function that handles retrieving a list of resources from a rest.Storage object.
func ListResource(r rest.Lister, rw rest.Watcher, scope RequestScope, forceWatch bool, minRequestTimeout time.Duration) restful.RouteFunction {
return func(req *restful.Request, res *restful.Response) {
// For performance tracking purposes.
trace := util.NewTrace("List " + req.Request.URL.Path)
w := res.ResponseWriter
namespace, err := scope.Namer.Namespace(req)
if err != nil {
scope.err(err, res.ResponseWriter, req.Request)
return
}
// Watches for single objects are routed to this function.
// Treat a /name parameter the same as a field selector entry.
hasName := true
_, name, err := scope.Namer.Name(req)
if err != nil {
hasName = false
}
ctx := scope.ContextFunc(req)
ctx = api.WithNamespace(ctx, namespace)
opts := api.ListOptions{}
if err := scope.ParameterCodec.DecodeParameters(req.Request.URL.Query(), scope.Kind.GroupVersion(), &opts); err != nil {
scope.err(err, res.ResponseWriter, req.Request)
return
}
// transform fields
// TODO: DecodeParametersInto should do this.
if opts.FieldSelector != nil {
fn := func(label, value string) (newLabel, newValue string, err error) {
return scope.Convertor.ConvertFieldLabel(scope.Kind.GroupVersion().String(), scope.Kind.Kind, label, value)
}
if opts.FieldSelector, err = opts.FieldSelector.Transform(fn); err != nil {
// TODO: allow bad request to set field causes based on query parameters
err = errors.NewBadRequest(err.Error())
scope.err(err, res.ResponseWriter, req.Request)
return
}
}
if hasName {
// metadata.name is the canonical internal name.
// generic.SelectionPredicate will notice that this is
// a request for a single object and optimize the
// storage query accordingly.
nameSelector := fields.OneTermEqualSelector("metadata.name", name)
if opts.FieldSelector != nil && !opts.FieldSelector.Empty() {
// It doesn't make sense to ask for both a name
// and a field selector, since just the name is
// sufficient to narrow down the request to a
// single object.
scope.err(errors.NewBadRequest("both a name and a field selector provided; please provide one or the other."), res.ResponseWriter, req.Request)
return
}
opts.FieldSelector = nameSelector
}
if (opts.Watch || forceWatch) && rw != nil {
watcher, err := rw.Watch(ctx, &opts)
if err != nil {
scope.err(err, res.ResponseWriter, req.Request)
return
}
// TODO: Currently we explicitly ignore ?timeout= and use only ?timeoutSeconds=.
timeout := time.Duration(0)
if opts.TimeoutSeconds != nil {
timeout = time.Duration(*opts.TimeoutSeconds) * time.Second
}
if timeout == 0 && minRequestTimeout > 0 {
timeout = time.Duration(float64(minRequestTimeout) * (rand.Float64() + 1.0))
}
serveWatch(watcher, scope, req, res, timeout)
return
}
// Log only long List requests (ignore Watch).
defer trace.LogIfLong(500 * time.Millisecond)
trace.Step("About to List from storage")
result, err := r.List(ctx, &opts)
if err != nil {
scope.err(err, res.ResponseWriter, req.Request)
return
}
trace.Step("Listing from storage done")
numberOfItems, err := setListSelfLink(result, req, scope.Namer)
if err != nil {
scope.err(err, res.ResponseWriter, req.Request)
return
}
trace.Step("Self-linking done")
write(http.StatusOK, scope.Kind.GroupVersion(), scope.Serializer, result, w, req.Request)
trace.Step(fmt.Sprintf("Writing http response done (%d items)", numberOfItems))
}
}
