// ServerGroups returns the supported groups, with information like supported versions and the
// preferred version.
func (d *DiscoveryClient) ServerGroups() (apiGroupList *unversioned.APIGroupList, err error) {
// Get the groupVersions exposed at /api
v := &unversioned.APIVersions{}
err = d.Get().AbsPath(d.LegacyPrefix).Do().Into(v)
apiGroup := unversioned.APIGroup{}
if err == nil {
apiGroup = apiVersionsToAPIGroup(v)
}
if err != nil && !errors.IsNotFound(err) && !errors.IsForbidden(err) {
return nil, err
}
// Get the groupVersions exposed at /apis
apiGroupList = &unversioned.APIGroupList{}
err = d.Get().AbsPath("/apis").Do().Into(apiGroupList)
if err != nil && !errors.IsNotFound(err) && !errors.IsForbidden(err) {
return nil, err
}
// to be compatible with a v1.0 server, if it's a 403 or 404, ignore and return whatever we got from /api
if err != nil && (errors.IsNotFound(err) || errors.IsForbidden(err)) {
apiGroupList = &unversioned.APIGroupList{}
}
// append the group retrieved from /api to the list
apiGroupList.Groups = append(apiGroupList.Groups, apiGroup)
return apiGroupList, nil
}
// GetAPIGroupResources uses the provided discovery client to gather
// discovery information and populate a slice of APIGroupResources.
func GetAPIGroupResources(cl DiscoveryInterface) ([]*APIGroupResources, error) {
apiGroups, err := cl.ServerGroups()
if err != nil {
return nil, err
}
var result []*APIGroupResources
for _, group := range apiGroups.Groups {
groupResources := &APIGroupResources{
Group: group,
VersionedResources: make(map[string][]unversioned.APIResource),
}
for _, version := range group.Versions {
resources, err := cl.ServerResourcesForGroupVersion(version.GroupVersion)
if err != nil {
if errors.IsNotFound(err) {
continue // ignore as this can race with deletion of 3rd party APIs
}
return nil, err
}
groupResources.VersionedResources[version.Version] = resources.APIResources
}
result = append(result, groupResources)
}
return result, nil
}
// ServerResourcesForGroupVersion returns the supported resources for a group and version.
func (d *DiscoveryClient) ServerResourcesForGroupVersion(groupVersion string) (resources *unversioned.APIResourceList, err error) {
url := url.URL{}
if len(groupVersion) == 0 {
return nil, fmt.Errorf("groupVersion shouldn't be empty")
}
if len(d.LegacyPrefix) > 0 && groupVersion == "v1" {
url.Path = d.LegacyPrefix + "/" + groupVersion
} else {
url.Path = "/apis/" + groupVersion
}
resources = &unversioned.APIResourceList{}
err = d.Get().AbsPath(url.String()).Do().Into(resources)
if err != nil {
// ignore 403 or 404 error to be compatible with an v1.0 server.
if groupVersion == "v1" && (errors.IsNotFound(err) || errors.IsForbidden(err)) {
return resources, nil
}
return nil, err
}
return resources, nil
}
func TestTransformResponseNegotiate(t *testing.T) {
invalid := []byte("aaaaa")
uri, _ := url.Parse("http://localhost")
testCases := []struct {
Response *http.Response
Data []byte
Created bool
Error bool
ErrFn func(err error) bool
ContentType string
Called bool
ExpectContentType string
Decoder runtime.Decoder
NegotiateErr error
}{
{
ContentType: "application/json",
Response: &http.Response{
StatusCode: 401,
Header: http.Header{"Content-Type": []string{"application/json"}},
Body: ioutil.NopCloser(bytes.NewReader(invalid)),
},
Error: true,
ErrFn: func(err error) bool {
return err.Error() != "aaaaa" && apierrors.IsUnauthorized(err)
},
},
{
ContentType: "application/json",
Response: &http.Response{
StatusCode: 401,
Header: http.Header{"Content-Type": []string{"application/protobuf"}},
Body: ioutil.NopCloser(bytes.NewReader(invalid)),
},
Decoder: testapi.Default.Codec(),
Called: true,
ExpectContentType: "application/protobuf",
Error: true,
ErrFn: func(err error) bool {
return err.Error() != "aaaaa" && apierrors.IsUnauthorized(err)
},
},
{
ContentType: "application/json",
Response: &http.Response{
StatusCode: 500,
Header: http.Header{"Content-Type": []string{"application/,others"}},
},
Decoder: testapi.Default.Codec(),
Error: true,
ErrFn: func(err error) bool {
return err.Error() == "Internal error occurred: mime: expected token after slash" && err.(apierrors.APIStatus).Status().Code == 500
},
},
{
// no negotiation when no content type specified
Response: &http.Response{
StatusCode: 200,
Header: http.Header{"Content-Type": []string{"text/any"}},
Body: ioutil.NopCloser(bytes.NewReader(invalid)),
},
Decoder: testapi.Default.Codec(),
},
{
// no negotiation when no response content type specified
ContentType: "text/any",
Response: &http.Response{
StatusCode: 200,
Body: ioutil.NopCloser(bytes.NewReader(invalid)),
},
Decoder: testapi.Default.Codec(),
},
{
// unrecognized content type is not handled
ContentType: "application/json",
Response: &http.Response{
StatusCode: 404,
Header: http.Header{"Content-Type": []string{"application/unrecognized"}},
Body: ioutil.NopCloser(bytes.NewReader(invalid)),
},
Decoder: testapi.Default.Codec(),
NegotiateErr: fmt.Errorf("aaaa"),
Called: true,
ExpectContentType: "application/unrecognized",
Error: true,
ErrFn: func(err error) bool {
return err.Error() != "aaaaa" && apierrors.IsNotFound(err)
},
},
}
for i, test := range testCases {
serializers := defaultSerializers()
negotiator := &renegotiator{
decoder: test.Decoder,
err: test.NegotiateErr,
}
serializers.RenegotiatedDecoder = negotiator.invoke
contentConfig := defaultContentConfig()
contentConfig.ContentType = test.ContentType
r := NewRequest(nil, "", uri, "", contentConfig, serializers, nil, nil)
if test.Response.Body == nil {
test.Response.Body = ioutil.NopCloser(bytes.NewReader([]byte{}))
}
result := r.transformResponse(test.Response, &http.Request{})
_, err := result.body, result.err
hasErr := err != nil
if hasErr != test.Error {
t.Errorf("%d: unexpected error: %t %v", i, test.Error, err)
continue
} else if hasErr && test.Response.StatusCode > 399 {
status, ok := err.(apierrors.APIStatus)
if !ok {
t.Errorf("%d: response should have been transformable into APIStatus: %v", i, err)
continue
}
if int(status.Status().Code) != test.Response.StatusCode {
t.Errorf("%d: status code did not match response: %#v", i, status.Status())
}
}
if test.ErrFn != nil && !test.ErrFn(err) {
t.Errorf("%d: error function did not match: %v", i, err)
}
if negotiator.called != test.Called {
t.Errorf("%d: negotiator called %t != %t", i, negotiator.called, test.Called)
}
if !test.Called {
continue
}
if negotiator.contentType != test.ExpectContentType {
t.Errorf("%d: unexpected content type: %s", i, negotiator.contentType)
}
}
}