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mirror of https://github.com/go-micro/go-micro.git synced 2024-12-18 08:26:38 +02:00

cleanup mdns files

This commit is contained in:
Asim Aslam 2020-04-10 17:19:26 +01:00
parent d134b469be
commit 4fd12430d0
4 changed files with 127 additions and 138 deletions

View File

@ -1,73 +0,0 @@
package registry
import (
"bytes"
"compress/zlib"
"encoding/hex"
"encoding/json"
"io/ioutil"
"strings"
)
func encode(txt *mdnsTxt) ([]string, error) {
b, err := json.Marshal(txt)
if err != nil {
return nil, err
}
var buf bytes.Buffer
defer buf.Reset()
w := zlib.NewWriter(&buf)
if _, err := w.Write(b); err != nil {
return nil, err
}
w.Close()
encoded := hex.EncodeToString(buf.Bytes())
// individual txt limit
if len(encoded) <= 255 {
return []string{encoded}, nil
}
// split encoded string
var record []string
for len(encoded) > 255 {
record = append(record, encoded[:255])
encoded = encoded[255:]
}
record = append(record, encoded)
return record, nil
}
func decode(record []string) (*mdnsTxt, error) {
encoded := strings.Join(record, "")
hr, err := hex.DecodeString(encoded)
if err != nil {
return nil, err
}
br := bytes.NewReader(hr)
zr, err := zlib.NewReader(br)
if err != nil {
return nil, err
}
rbuf, err := ioutil.ReadAll(zr)
if err != nil {
return nil, err
}
var txt *mdnsTxt
if err := json.Unmarshal(rbuf, &txt); err != nil {
return nil, err
}
return txt, nil
}

View File

@ -1,65 +0,0 @@
package registry
import (
"testing"
)
func TestEncoding(t *testing.T) {
testData := []*mdnsTxt{
{
Version: "1.0.0",
Metadata: map[string]string{
"foo": "bar",
},
Endpoints: []*Endpoint{
{
Name: "endpoint1",
Request: &Value{
Name: "request",
Type: "request",
},
Response: &Value{
Name: "response",
Type: "response",
},
Metadata: map[string]string{
"foo1": "bar1",
},
},
},
},
}
for _, d := range testData {
encoded, err := encode(d)
if err != nil {
t.Fatal(err)
}
for _, txt := range encoded {
if len(txt) > 255 {
t.Fatalf("One of parts for txt is %d characters", len(txt))
}
}
decoded, err := decode(encoded)
if err != nil {
t.Fatal(err)
}
if decoded.Version != d.Version {
t.Fatalf("Expected version %s got %s", d.Version, decoded.Version)
}
if len(decoded.Endpoints) != len(d.Endpoints) {
t.Fatalf("Expected %d endpoints, got %d", len(d.Endpoints), len(decoded.Endpoints))
}
for k, v := range d.Metadata {
if val := decoded.Metadata[k]; val != v {
t.Fatalf("Expected %s=%s got %s=%s", k, v, k, val)
}
}
}
}

View File

@ -2,8 +2,13 @@
package registry package registry
import ( import (
"bytes"
"compress/zlib"
"context" "context"
"encoding/hex"
"encoding/json"
"fmt" "fmt"
"io/ioutil"
"net" "net"
"strconv" "strconv"
"strings" "strings"
@ -49,6 +54,68 @@ type mdnsRegistry struct {
listener chan *mdns.ServiceEntry listener chan *mdns.ServiceEntry
} }
func encode(txt *mdnsTxt) ([]string, error) {
b, err := json.Marshal(txt)
if err != nil {
return nil, err
}
var buf bytes.Buffer
defer buf.Reset()
w := zlib.NewWriter(&buf)
if _, err := w.Write(b); err != nil {
return nil, err
}
w.Close()
encoded := hex.EncodeToString(buf.Bytes())
// individual txt limit
if len(encoded) <= 255 {
return []string{encoded}, nil
}
// split encoded string
var record []string
for len(encoded) > 255 {
record = append(record, encoded[:255])
encoded = encoded[255:]
}
record = append(record, encoded)
return record, nil
}
func decode(record []string) (*mdnsTxt, error) {
encoded := strings.Join(record, "")
hr, err := hex.DecodeString(encoded)
if err != nil {
return nil, err
}
br := bytes.NewReader(hr)
zr, err := zlib.NewReader(br)
if err != nil {
return nil, err
}
rbuf, err := ioutil.ReadAll(zr)
if err != nil {
return nil, err
}
var txt *mdnsTxt
if err := json.Unmarshal(rbuf, &txt); err != nil {
return nil, err
}
return txt, nil
}
func newRegistry(opts ...Option) Registry { func newRegistry(opts ...Option) Registry {
options := Options{ options := Options{
Context: context.Background(), Context: context.Background(),

View File

@ -137,3 +137,63 @@ func TestMDNS(t *testing.T) {
} }
} }
func TestEncoding(t *testing.T) {
testData := []*mdnsTxt{
{
Version: "1.0.0",
Metadata: map[string]string{
"foo": "bar",
},
Endpoints: []*Endpoint{
{
Name: "endpoint1",
Request: &Value{
Name: "request",
Type: "request",
},
Response: &Value{
Name: "response",
Type: "response",
},
Metadata: map[string]string{
"foo1": "bar1",
},
},
},
},
}
for _, d := range testData {
encoded, err := encode(d)
if err != nil {
t.Fatal(err)
}
for _, txt := range encoded {
if len(txt) > 255 {
t.Fatalf("One of parts for txt is %d characters", len(txt))
}
}
decoded, err := decode(encoded)
if err != nil {
t.Fatal(err)
}
if decoded.Version != d.Version {
t.Fatalf("Expected version %s got %s", d.Version, decoded.Version)
}
if len(decoded.Endpoints) != len(d.Endpoints) {
t.Fatalf("Expected %d endpoints, got %d", len(d.Endpoints), len(decoded.Endpoints))
}
for k, v := range d.Metadata {
if val := decoded.Metadata[k]; val != v {
t.Fatalf("Expected %s=%s got %s=%s", k, v, k, val)
}
}
}
}