consul config source support 1st-level array

Check whetehr the 1st level encoded json is array or not, to
support 1st level array in consul config.

During debug, i suspected the incapability of arrray is caused by
json reader, so i added test for array. I think it makes no harm
to also check that in.
This commit is contained in:
magodo 2019-06-21 00:25:39 +08:00
parent 3f910038a3
commit 92b998c3ab
2 changed files with 118 additions and 34 deletions

View File

@ -1,39 +1,85 @@
package json
import (
"reflect"
"testing"
"github.com/micro/go-micro/config/source"
)
func TestValues(t *testing.T) {
data := []byte(`{"foo": "bar", "baz": {"bar": "cat"}}`)
emptyStr := ""
testData := []struct {
csdata []byte
path []string
value string
accepter interface{}
value interface{}
}{
{
[]byte(`{"foo": "bar", "baz": {"bar": "cat"}}`),
[]string{"foo"},
emptyStr,
"bar",
},
{
[]byte(`{"foo": "bar", "baz": {"bar": "cat"}}`),
[]string{"baz", "bar"},
emptyStr,
"cat",
},
}
for idx, test := range testData {
values, err := newValues(&source.ChangeSet{
Data: data,
Data: test.csdata,
})
if err != nil {
t.Fatal(err)
}
for _, test := range testData {
if v := values.Get(test.path...).String(""); v != test.value {
t.Fatalf("Expected %s got %s for path %v", test.value, v, test.path)
err = values.Get(test.path...).Scan(&test.accepter)
if err != nil {
t.Fatal(err)
}
if test.accepter != test.value {
t.Fatalf("No.%d Expected %v got %v for path %v", idx, test.value, test.accepter, test.path)
}
}
}
func TestStructArray(t *testing.T) {
type T struct {
Foo string
}
emptyTSlice := []T{}
testData := []struct {
csdata []byte
accepter []T
value []T
}{
{
[]byte(`[{"foo": "bar"}]`),
emptyTSlice,
[]T{T{Foo: "bar"}},
},
}
for idx, test := range testData {
values, err := newValues(&source.ChangeSet{
Data: test.csdata,
})
if err != nil {
t.Fatal(err)
}
err = values.Get().Scan(&test.accepter)
if err != nil {
t.Fatal(err)
}
if !reflect.DeepEqual(test.accepter, test.value) {
t.Fatalf("No.%d Expected %v got %v", idx, test.value, test.accepter)
}
}
}

View File

@ -8,40 +8,78 @@ import (
"github.com/micro/go-micro/config/encoder"
)
type jsonValue interface {
Value() interface{}
Decode(encoder.Encoder, []byte) (jsonValue, error)
}
type jsonArrayValue []interface{}
type jsonMapValue map[string]interface{}
func (a jsonArrayValue) Value() interface{} { return a }
func (a jsonArrayValue) Decode(e encoder.Encoder, b []byte) (jsonValue, error) {
v := jsonArrayValue{}
err := e.Decode(b, &v)
return v, err
}
func (m jsonMapValue) Value() interface{} { return m }
func (m jsonMapValue) Decode(e encoder.Encoder, b []byte) (jsonValue, error) {
v := jsonMapValue{}
err := e.Decode(b, &v)
return v, err
}
func makeMap(e encoder.Encoder, kv api.KVPairs, stripPrefix string) (map[string]interface{}, error) {
data := make(map[string]interface{})
// consul guarantees lexicographic order, so no need to sort
for _, v := range kv {
pathString := strings.TrimPrefix(strings.TrimPrefix(v.Key, stripPrefix), "/")
var val map[string]interface{}
if pathString == "" {
continue
}
var val jsonValue
var err error
// ensure a valid value is stored at this location
if len(v.Value) > 0 {
if err := e.Decode(v.Value, &val); err != nil {
// check whether this is an array
if v.Value[0] == 91 && v.Value[len(v.Value)-1] == 93 {
val = jsonArrayValue{}
if val, err = val.Decode(e, v.Value); err != nil {
return nil, fmt.Errorf("faild decode value. path: %s, error: %s", pathString, err)
}
} else {
val = jsonMapValue{}
if val, err = val.Decode(e, v.Value); err != nil {
return nil, fmt.Errorf("faild decode value. path: %s, error: %s", pathString, err)
}
}
}
// set target at the root
target := data
// then descend to the target location, creating as we go, if need be
if pathString != "" {
path := strings.Split(pathString, "/")
// find (or create) the location we want to put this value at
for _, dir := range path {
// find (or create) the leaf node we want to put this value at
for _, dir := range path[:len(path)-1] {
if _, ok := target[dir]; !ok {
target[dir] = make(map[string]interface{})
}
target = target[dir].(map[string]interface{})
}
}
leafDir := path[len(path)-1]
// copy over the keys from the value
for k := range val {
target[k] = val[k]
switch val.(type) {
case jsonArrayValue:
target[leafDir] = val.Value()
case jsonMapValue:
target[leafDir] = make(map[string]interface{})
target = target[leafDir].(map[string]interface{})
mapv := val.Value().(jsonMapValue)
for k := range mapv {
target[k] = mapv[k]
}
}
}