SCB-2096 The configuration center supports fuzzy query (#163)

* SCB-2096 The configuration center supports fuzzy query

* SCB-2096 The configuration center supports fuzzy query

* SCB-2096 The configuration center supports fuzzy query

* SCB-2096 The configuration center supports fuzzy query

pkg/validate/instance.go

@@ -5,14 +5,15 @@ var defaultValidator = NewValidator()
 const (
 	key                   = "key"
 	commonNameRegexString = `^[a-zA-Z0-9]*$|^[a-zA-Z0-9][a-zA-Z0-9_\-.]*[a-zA-Z0-9]$`
+	getKeyRegexString     = `^[a-zA-Z0-9]*$|^[a-zA-Z0-9][a-zA-Z0-9_\-.]*[a-zA-Z0-9]$|^beginWith\([a-zA-Z0-9][a-zA-Z0-9_\-.]*\)$`
 	asciiRegexString      = `^[\x00-\x7F]*$`
 )
 
 // custom validate rules
 // please use different tag names from third party tags
 var customRules = []*RegexValidateRule{
 	NewRule(key, commonNameRegexString, &Option{Min: 1, Max: 128}),
-	NewRule("getKey", commonNameRegexString, &Option{Max: 128}),
+	NewRule("getKey", getKeyRegexString, &Option{Max: 128}),
 	NewRule("commonName", commonNameRegexString, &Option{Min: 1, Max: 256}),
 	NewRule("valueType", `^$|^(ini|json|text|yaml|properties)$`, nil),
 	NewRule("kvStatus", `^$|^(enabled|disabled)$`, nil),

pkg/validate/instance_test.go

@@ -107,4 +107,19 @@ func TestValidate(t *testing.T) {
 		Labels: map[string]string{string32 + "a": "a"},
 	}
 	assert.Error(t, validate.Validate(kvDoc))
+
+	ListKVRe := &model.ListKVRequest{Project: "a", Domain: "a",
+		Key: "beginWith(a)",
+	}
+	assert.NoError(t, validate.Validate(ListKVRe))
+
+	ListKVRe = &model.ListKVRequest{Project: "a", Domain: "a",
+		Key: "beginW(a)",
+	}
+	assert.Error(t, validate.Validate(ListKVRe))
+
+	ListKVRe = &model.ListKVRequest{Project: "a", Domain: "a",
+		Key: "beginW()",
+	}
+	assert.Error(t, validate.Validate(ListKVRe))
 }

server/resource/v1/kv_resource_test.go

@@ -315,6 +315,21 @@ func TestKVResource_List(t *testing.T) {
 		assert.NoError(t, err)
 		assert.Equal(t, 1, len(result.Data))
 	})
+	t.Run("get one key, fuzzy match,should return 2 kv", func(t *testing.T) {
+		r, _ := http.NewRequest("GET", "/v1/kv_test/kie/kv?key=beginWith(time)", nil)
+		r.Header.Set("Content-Type", "application/json")
+		kvr := &v1.KVResource{}
+		c, err := restfultest.New(kvr, nil)
+		assert.NoError(t, err)
+		resp := httptest.NewRecorder()
+		c.ServeHTTP(resp, r)
+		body, err := ioutil.ReadAll(resp.Body)
+		assert.NoError(t, err)
+		result := &model.KVResponse{}
+		err = json.Unmarshal(body, result)
+		assert.NoError(t, err)
+		assert.Equal(t, 2, len(result.Data))
+	})
 	t.Run("get one key by service label should return 2 kv,delete one", func(t *testing.T) {
 		r, _ := http.NewRequest("GET", "/v1/kv_test/kie/kv?key=timeout&label=service:utService", nil)
 		r.Header.Set("Content-Type", "application/json")

server/service/mongo/kv/kv_dao.go

@@ -20,6 +20,8 @@ package kv
 import (
 	"context"
 	"fmt"
+	"regexp"
+	"strings"
 	"time"
 
 	"github.com/apache/servicecomb-kie/pkg/model"
@@ -108,12 +110,22 @@ func updateKeyValue(ctx context.Context, kv *model.KVDoc) error {
 
 }
 
+//Extract key values
+func getValue(str string) string {
+	rex := regexp.MustCompile(`\(([^)]+)\)`)
+	res := rex.FindStringSubmatch(str)
+	return res[len(res)-1]
+}
+
 func findKV(ctx context.Context, domain string, project string, opts service.FindOptions) (*mongo.Cursor, int, error) {
 	collection := session.GetDB().Collection(session.CollectionKV)
 	ctx, _ = context.WithTimeout(ctx, opts.Timeout)
 	filter := bson.M{"domain": domain, "project": project}
 	if opts.Key != "" {
 		filter["key"] = opts.Key
+		if strings.HasPrefix(opts.Key, "beginWith") {
+			filter["key"] = bson.M{"$regex": getValue(opts.Key), "$options": "$i"}
+		}
 	}
 	if len(opts.Labels) != 0 {
 		for k, v := range opts.Labels {