Golang Codec.DecodeInto方法代碼示例

func roundTrip(t *testing.T, codec runtime.Codec, item runtime.Object) {
	printer := spew.ConfigState{DisableMethods: true}

	name := reflect.TypeOf(item).Elem().Name()
	data, err := codec.Encode(item)
	if err != nil {
		t.Errorf("%v: %v (%s)", name, err, printer.Sprintf("%#v", item))
		return
	}

	obj2, err := codec.Decode(data)
	if err != nil {
		t.Errorf("0: %v: %v\nCodec: %v\nData: %s\nSource: %#v", name, err, codec, string(data), printer.Sprintf("%#v", item))
		return
	}
	if !api.Semantic.DeepEqual(item, obj2) {
		t.Errorf("1: %v: diff: %v\nCodec: %v\nData: %s\nSource: %#v\nFinal: %#v", name, util.ObjectGoPrintDiff(item, obj2), codec, string(data), printer.Sprintf("%#v", item), printer.Sprintf("%#v", obj2))
		return
	}

	obj3 := reflect.New(reflect.TypeOf(item).Elem()).Interface().(runtime.Object)
	err = codec.DecodeInto(data, obj3)
	if err != nil {
		t.Errorf("2: %v: %v", name, err)
		return
	}
	if !api.Semantic.DeepEqual(item, obj3) {
		t.Errorf("3: %v: diff: %v\nCodec: %v", name, util.ObjectDiff(item, obj3), codec)
		return
	}
}

// CreateResource returns a function that will handle a resource creation.
func CreateResource(r RESTCreater, ctxFn ContextFunc, namer ScopeNamer, codec runtime.Codec, typer runtime.ObjectTyper, resource string, admit admission.Interface) restful.RouteFunction {
	return func(req *restful.Request, res *restful.Response) {
		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, err := namer.Namespace(req)
		if err != nil {
			errorJSON(err, codec, w)
			return
		}
		ctx := ctxFn(req)
		ctx = api.WithNamespace(ctx, namespace)

		body, err := readBody(req.Request)
		if err != nil {
			errorJSON(err, codec, w)
			return
		}

		obj := r.New()
		if err := codec.DecodeInto(body, obj); err != nil {
			err = transformDecodeError(typer, err, obj, body)
			errorJSON(err, codec, w)
			return
		}

		err = admit.Admit(admission.NewAttributesRecord(obj, namespace, resource, "CREATE"))
		if err != nil {
			errorJSON(err, codec, w)
			return
		}

		result, err := finishRequest(timeout, func() (runtime.Object, error) {
			out, err := r.Create(ctx, obj)
			if status, ok := out.(*api.Status); ok && err == nil && status.Code == 0 {
				status.Code = http.StatusCreated
			}
			return out, err
		})
		if err != nil {
			errorJSON(err, codec, w)
			return
		}

		if err := setSelfLink(result, req, namer); err != nil {
			errorJSON(err, codec, w)
			return
		}

		writeJSON(http.StatusCreated, codec, result, w)
	}
}

// ToWireFormat takes input 'data' as either json or yaml, checks that it parses as the
// appropriate object type, and returns json for sending to the API or an error.
func (p *Parser) ToWireFormat(data []byte, storage string, c runtime.Codec) ([]byte, error) {
	prototypeType, found := p.storageToType[storage]
	if !found {
		return nil, fmt.Errorf("unknown storage type: %v", storage)
	}

	obj := reflect.New(prototypeType).Interface().(runtime.Object)
	err := c.DecodeInto(data, obj)
	if err != nil {
		return nil, err
	}
	return c.Encode(obj)
}

func roundTrip(t *testing.T, codec runtime.Codec, originalItem runtime.Object) {
	// Make a copy of the originalItem to give to conversion functions
	// This lets us know if conversion messed with the input object
	deepCopy, err := api.Scheme.DeepCopy(originalItem)
	if err != nil {
		t.Errorf("Could not copy object: %v", err)
		return
	}
	item := deepCopy.(runtime.Object)

	name := reflect.TypeOf(item).Elem().Name()
	data, err := codec.Encode(item)
	if err != nil {
		if conversion.IsNotRegisteredError(err) {
			t.Logf("%v is not registered", name)
			return
		}
		t.Errorf("%v: %v (%#v)", name, err, item)
		return
	}

	obj2, err := codec.Decode(data)
	if err != nil {
		t.Errorf("0: %v: %v\nCodec: %v\nData: %s\nSource: %#v", name, err, codec, string(data), originalItem)
		return
	}
	if reflect.TypeOf(item) != reflect.TypeOf(obj2) {
		obj2conv := reflect.New(reflect.TypeOf(item).Elem()).Interface().(runtime.Object)
		if err := api.Scheme.Convert(obj2, obj2conv); err != nil {
			t.Errorf("0X: no conversion from %v to %v: %v", reflect.TypeOf(item), reflect.TypeOf(obj2), err)
			return
		}
		obj2 = obj2conv
	}
	if !api.Semantic.DeepEqual(originalItem, obj2) {
		t.Errorf("1: %v: diff: %v\nCodec: %v\nData: %s\nSource: %s", name, util.ObjectDiff(originalItem, obj2), codec, string(data), util.ObjectGoPrintSideBySide(originalItem, obj2))
		return
	}

	obj3 := reflect.New(reflect.TypeOf(item).Elem()).Interface().(runtime.Object)
	err = codec.DecodeInto(data, obj3)
	if err != nil {
		t.Errorf("2: %v: %v", name, err)
		return
	}
	if !api.Semantic.DeepEqual(originalItem, obj3) {
		t.Errorf("3: %v: diff: %v\nCodec: %v", name, util.ObjectDiff(originalItem, obj3), codec)
		return
	}
}

func runTest(t *testing.T, codec runtime.Codec, source runtime.Object) {
	name := reflect.TypeOf(source).Elem().Name()
	apiObjectFuzzer.Fuzz(source)
	j, err := runtime.FindJSONBase(source)
	if err != nil {
		t.Fatalf("Unexpected error %v for %#v", err, source)
	}
	j.SetKind("")
	j.SetAPIVersion("")

	data, err := codec.Encode(source)
	if err != nil {
		t.Errorf("%v: %v (%#v)", name, err, source)
		return
	}

	obj2, err := codec.Decode(data)
	if err != nil {
		t.Errorf("%v: %v", name, err)
		return
	} else {
		if !reflect.DeepEqual(source, obj2) {
			t.Errorf("1: %v: diff: %v", name, runtime.ObjectDiff(source, obj2))
			return
		}
	}
	obj3 := reflect.New(reflect.TypeOf(source).Elem()).Interface().(runtime.Object)
	err = codec.DecodeInto(data, obj3)
	if err != nil {
		t.Errorf("2: %v: %v", name, err)
		return
	} else {
		if !reflect.DeepEqual(source, obj3) {
			t.Errorf("3: %v: diff: %v", name, runtime.ObjectDiff(source, obj3))
			return
		}
	}
}

// PatchResource returns a function that will handle a resource patch
// TODO: Eventually PatchResource should just use AtomicUpdate and this routine should be a bit cleaner
func PatchResource(r RESTPatcher, ctxFn ContextFunc, namer ScopeNamer, codec runtime.Codec, typer runtime.ObjectTyper, resource string, admit admission.Interface) restful.RouteFunction {
	return func(req *restful.Request, res *restful.Response) {
		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 := namer.Name(req)
		if err != nil {
			errorJSON(err, codec, w)
			return
		}

		obj := r.New()
		// PATCH requires same permission as UPDATE
		err = admit.Admit(admission.NewAttributesRecord(obj, namespace, resource, "UPDATE"))
		if err != nil {
			errorJSON(err, codec, w)
			return
		}

		ctx := ctxFn(req)
		ctx = api.WithNamespace(ctx, namespace)

		original, err := r.Get(ctx, name)
		if err != nil {
			errorJSON(err, codec, w)
			return
		}

		originalObjJs, err := codec.Encode(original)
		if err != nil {
			errorJSON(err, codec, w)
			return
		}
		patchJs, err := readBody(req.Request)
		if err != nil {
			errorJSON(err, codec, w)
			return
		}
		patchedObjJs, err := jsonpatch.MergePatch(originalObjJs, patchJs)
		if err != nil {
			errorJSON(err, codec, w)
			return
		}

		if err := codec.DecodeInto(patchedObjJs, obj); err != nil {
			errorJSON(err, codec, w)
			return
		}
		if err := checkName(obj, name, namespace, namer); err != nil {
			errorJSON(err, codec, w)
			return
		}

		result, err := finishRequest(timeout, func() (runtime.Object, error) {
			// update should never create as previous get would fail
			obj, _, err := r.Update(ctx, obj)
			return obj, err
		})
		if err != nil {
			errorJSON(err, codec, w)
			return
		}

		if err := setSelfLink(result, req, namer); err != nil {
			errorJSON(err, codec, w)
			return
		}

		writeJSON(http.StatusOK, codec, result, w)
	}
}