/
gateway.go
122 lines (97 loc) · 2.82 KB
/
gateway.go
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// The commmon package provides structs and functions for external code to interact with this gateway service.
package external
import (
"encoding/json"
"errors"
"fmt"
"io/ioutil"
"net/http"
"os"
"path/filepath"
"strings"
"time"
"github.com/IceWhaleTech/CasaOS-Common/model"
http2 "github.com/IceWhaleTech/CasaOS-Common/utils/http"
)
const (
ManagementURLFilename = "management.url"
StaticURLFilename = "static.url"
APIGatewayRoutes = "/v1/gateway/routes"
APIGatewayPort = "/v1/gateway/port"
)
type ManagementService interface {
CreateRoute(route *model.Route) error
ChangePort(request *model.ChangePortRequest) error
GetPort() (error, string)
}
type managementService struct {
address string
}
func (m *managementService) CreateRoute(route *model.Route) error {
url := strings.TrimSuffix(m.address, "/") + "/" + strings.TrimPrefix(APIGatewayRoutes, "/")
body, err := json.Marshal(route)
if err != nil {
return err
}
response, err := http2.Post(url, body, 30*time.Second)
if err != nil {
return err
}
defer response.Body.Close()
if response.StatusCode != http.StatusCreated {
return errors.New("failed to create route (status code: " + fmt.Sprint(response.StatusCode) + ")")
}
return nil
}
func (m *managementService) ChangePort(request *model.ChangePortRequest) error {
url := strings.TrimSuffix(m.address, "/") + "/" + strings.TrimPrefix(APIGatewayPort, "/")
body, err := json.Marshal(request)
if err != nil {
return err
}
response, err := http2.Put(url, body, 30*time.Second)
if err != nil {
return err
}
if response.StatusCode != http.StatusOK {
return errors.New("failed to change port (status code: " + fmt.Sprint(response.StatusCode) + ")")
}
return nil
}
func (m *managementService) GetPort() (error, string) {
url := strings.TrimSuffix(m.address, "/") + "/" + strings.TrimPrefix(APIGatewayPort, "/")
response, err := http2.Get(url, 30*time.Second)
if err != nil {
return err, ""
}
if response.StatusCode != http.StatusOK {
return errors.New("failed to change port (status code: " + fmt.Sprint(response.StatusCode) + ")"), ""
}
str, err := ioutil.ReadAll(response.Body)
if err != nil {
return err, ""
}
return nil, string(str)
}
func NewManagementService(RuntimePath string) (ManagementService, error) {
managementAddressFile := filepath.Join(RuntimePath, ManagementURLFilename)
retry := 10
for retry > 0 {
if _, err := os.Stat(managementAddressFile); err == nil {
break
}
fmt.Printf("gateway management address file `%s` not found, retrying in 1 second...(%d)\n", managementAddressFile, retry)
time.Sleep(1 * time.Second)
retry--
}
address, err := getAddress(managementAddressFile)
if err != nil {
return nil, err
}
if err := ping(address, 30*time.Second); err != nil {
return nil, err
}
return &managementService{
address: address,
}, nil
}