/
registry.go
134 lines (110 loc) · 2.29 KB
/
registry.go
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package gtun
import (
"bytes"
"encoding/json"
"errors"
"fmt"
"io/ioutil"
"net/http"
"runtime"
"time"
"github.com/ICKelin/gtun/common"
)
var (
defaultAddr = "http://127.0.0.1:9091"
defaultToken = "gtun-cs-token"
defaultConfig = &RegistryConfig{
Addr: defaultAddr,
Token: defaultToken,
Must: false,
}
)
type RegistryConfig struct {
Addr string `json:"addr"`
Token string `json:"token"`
Must bool `json:"must"`
}
type Registry struct {
addr string
token string
must bool
}
func NewRegistry(cfg *RegistryConfig) *Registry {
if cfg == nil {
cfg = defaultConfig
}
addr := cfg.Addr
if addr == "" {
addr = defaultAddr
}
token := cfg.Token
if token == "" {
token = defaultToken
}
return &Registry{
addr: cfg.Addr,
token: cfg.Token,
must: cfg.Must,
}
}
func (r *Registry) Access() (string, error) {
url := fmt.Sprintf("%s/gtun/access", r.addr)
body := &common.C2GRegister{
IsWindows: runtime.GOOS == "windows",
AuthToken: r.token,
}
s, err := PostJson(url, body, nil)
if err != nil {
return "", err
}
respbody := &common.ResponseBody{}
err = json.Unmarshal([]byte(s), &respbody)
if err != nil {
return "", err
}
if respbody.Code != common.CODE_SUCCESS {
return "", errors.New(respbody.Message)
}
bytes, err := json.Marshal(respbody.Data)
if err != nil {
return "", err
}
var gtunInfo common.G2CRegister
err = json.Unmarshal(bytes, >unInfo)
if err != nil {
return "", err
}
if gtunInfo.ServerAddress == "" {
return "", fmt.Errorf("empty server address")
}
return gtunInfo.ServerAddress, nil
}
func PostJson(uri string, jsonbody interface{}, header map[string]string) (data string, err error) {
tr := &http.Transport{
MaxIdleConns: 3,
IdleConnTimeout: 10 * time.Second,
}
client := &http.Client{Transport: tr}
params, err := json.Marshal(jsonbody)
if err != nil {
return "", err
}
request, err := http.NewRequest("POST", uri, bytes.NewReader(params))
if err != nil {
return "", err
}
request.Header.Set("Content-Type", "application/json")
for key, value := range header {
request.Header.Add(key, value)
}
resp, err := client.Do(request)
if err != nil {
return "", err
}
defer resp.Body.Close()
bdata, err := ioutil.ReadAll(resp.Body)
if err != nil {
return "", err
}
return string(bdata), nil
}