task: support api token request

go/tasks/jwt_token_gen.go

@@ -1,11 +1,22 @@
 package tasks
 
-import "ocl/portainer-devtool/configs"
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"ocl/portainer-devtool/configs"
+)
 
 type GenerateJwtTokenTask struct {
 	Config *configs.Config
 }
 
+type GenerateJwtTokenResponse struct {
+	JWT string `json:"jwt"`
+}
+
 func NewGenerateJwtTokenTask(cfg *configs.Config) *GenerateJwtTokenTask {
 	return &GenerateJwtTokenTask{
 		Config: cfg,
@@ -13,6 +24,31 @@ func NewGenerateJwtTokenTask(cfg *configs.Config) *GenerateJwtTokenTask {
 }
 
 func (task *GenerateJwtTokenTask) Execute() error {
+	postBody, _ := json.Marshal(map[string]string{
+		"username": task.Config.LoginCredential.Username,
+		"password": task.Config.LoginCredential.Password,
+	})
+
+	responseBody := bytes.NewBuffer(postBody)
+	resp, err := http.Post(task.Config.LoginCredential.Address, "application/json", responseBody)
+	if err != nil {
+		return fmt.Errorf("http requset error: %s", err.Error())
+	}
+	defer resp.Body.Close()
+
+	//Read the response body
+	body, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		return fmt.Errorf("failed to parse the response body: %s", err.Error())
+	}
+
+	var ret GenerateJwtTokenResponse
+	err = json.Unmarshal(body, &ret)
+	if err != nil {
+		return err
+	}
+
+	fmt.Printf("jwt token is:\n%s\n", ret.JWT)
 	return nil
 }