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client.go
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client.go
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// This file is part of gobizfly
package gobizfly
import (
"bytes"
"context"
"encoding/json"
"errors"
"fmt"
"io/ioutil"
"net/http"
"net/url"
"path"
"strings"
)
const (
defaultAuthType = "token"
version = "0.0.1"
ua = "bizfly-client-go/" + version
defaultAPIURL = "https://manage.bizflycloud.vn/api"
mediaType = "application/json; charset=utf-8"
accountName = "bizfly_account"
loadBalancerServiceName = "load_balancer"
serverServiceName = "cloud_server"
cloudBackupServiceName = "cloud-backup"
autoScalingServiceName = "auto_scaling"
cloudwatcherServiceName = "alert"
authServiceName = "auth"
kubernetesServiceName = "kubernetes_engine"
containerRegistryName = "container_registry"
cdnName = "cdn"
dnsName = "dns"
databaseServiceName = "cloud_database"
iamServiceName = "iam"
)
var (
// ErrNotFound for resource not found status
ErrNotFound = errors.New("Resource not found")
// ErrPermissionDenied for permission denied
ErrPermissionDenied = errors.New("You are not allowed to do this action")
// ErrCommon for common error
ErrCommon = errors.New("Error")
)
// Client represents BizFly API client.
type Client struct {
AutoScaling AutoScalingService
CloudBackup CloudBackupService
CloudWatcher CloudWatcherService
Token TokenService
LoadBalancer LoadBalancerService
Listener ListenerService
Pool PoolService
Member MemberService
HealthMonitor HealthMonitorService
KubernetesEngine KubernetesEngineService
ScheduledVolumeBackup ScheduledVolumeBackup
ContainerRegistry ContainerRegistryService
CDN CDNService
DNS DNSService
Account AccountService
VPC VPCService
NetworkInterface NetworkInterfaceService
WanIP WanIPService
CloudDatabase CloudDatabaseService
IAM IAMService
Snapshot SnapshotService
Volume VolumeService
Server ServerService
Service ServiceInterface
Firewall FirewallService
SSHKey SSHKeyService
httpClient *http.Client
apiURL *url.URL
userAgent string
keystoneToken string
authMethod string
authType string
username string
password string
appCredID string
appCredSecret string
projectID string
regionName string
services []*Service
}
// Option set Client specific attributes
type Option func(c *Client) error
// WithAPIUrl sets the API url option for BizFly client.
func WithAPIUrl(u string) Option {
return func(c *Client) error {
var err error
c.apiURL, err = url.Parse(u)
return err
}
}
// WithHTTPClient sets the client option for BizFly client.
func WithHTTPClient(client *http.Client) Option {
return func(c *Client) error {
if client == nil {
return errors.New("client is nil")
}
c.httpClient = client
return nil
}
}
// WithRegionName sets the client region for BizFly client.
func WithRegionName(region string) Option {
return func(c *Client) error {
c.regionName = region
return nil
}
}
func WithProjectId(id string) Option {
return func(c *Client) error {
c.projectID = id
return nil
}
}
// NewClient creates new BizFly client.
func NewClient(options ...Option) (*Client, error) {
c := &Client{
httpClient: http.DefaultClient,
userAgent: ua,
}
err := WithAPIUrl(defaultAPIURL)(c)
if err != nil {
return nil, err
}
for _, option := range options {
if err := option(c); err != nil {
return nil, err
}
}
c.AutoScaling = &autoscalingService{client: c}
c.CloudBackup = &cloudBackupService{client: c}
c.CloudWatcher = &cloudwatcherService{client: c}
c.Snapshot = &snapshot{client: c}
c.Token = &token{client: c}
c.LoadBalancer = &loadbalancer{client: c}
c.Listener = &listener{client: c}
c.Pool = &pool{client: c}
c.HealthMonitor = &healthmonitor{client: c}
c.Member = &member{client: c}
c.Volume = &volume{client: c}
c.Server = &server{client: c}
c.Service = &service{client: c}
c.ScheduledVolumeBackup = &scheduledVolumeBackup{client: c}
c.Firewall = &firewall{client: c}
c.SSHKey = &sshkey{client: c}
c.KubernetesEngine = &kubernetesEngineService{client: c}
c.ContainerRegistry = &containerRegistry{client: c}
c.CDN = &cdnService{client: c}
c.DNS = &dnsService{client: c}
c.Account = &accountService{client: c}
c.VPC = &vpcService{client: c}
c.NetworkInterface = &networkInterfaceService{client: c}
c.WanIP = &wanIPService{client: c}
c.CloudDatabase = &cloudDatabaseService{client: c}
c.IAM = &iamService{client: c}
return c, nil
}
func (c *Client) GetServiceUrl(serviceName string) string {
// If service name is auth, return auth url without checking catalog
if serviceName == authServiceName {
// create a copy of apiURL
apiURL := *c.apiURL
// if apiUrl doesn't end with /api, append it
if !strings.HasSuffix(apiURL.Path, "/api") {
apiURL.Path = path.Join(c.apiURL.Path, "/api")
}
return apiURL.String()
}
for _, service := range c.services {
if service.CanonicalName == serviceName && service.Region == c.regionName {
return service.ServiceUrl
}
}
return defaultAPIURL
}
// NewRequest creates an API request.
func (c *Client) NewRequest(ctx context.Context, method, serviceName string, urlStr string, body interface{}) (*http.Request, error) {
serviceUrl := c.GetServiceUrl(serviceName)
url := serviceUrl + urlStr
buf := new(bytes.Buffer)
if body != nil {
if err := json.NewEncoder(buf).Encode(body); err != nil {
return nil, err
}
}
req, err := http.NewRequest(method, url, buf)
if err != nil {
return nil, err
}
req.Header.Add("Content-Type", mediaType)
req.Header.Add("Accept", mediaType)
req.Header.Add("User-Agent", c.userAgent)
req.Header.Add("X-Project-Id", c.projectID)
if c.authType == "" {
c.authType = defaultAuthType
}
if c.keystoneToken != "" {
req.Header.Add("X-Auth-Token", c.keystoneToken)
}
req.Header.Add("X-Auth-Type", c.authType)
return req, nil
}
func (c *Client) do(ctx context.Context, req *http.Request) (*http.Response, error) {
return c.httpClient.Do(req)
}
// Do sends API request.
func (c *Client) Do(ctx context.Context, req *http.Request) (resp *http.Response, err error) {
resp, err = c.do(ctx, req)
if err != nil {
return
}
// If 401, get new token and retry one time.
if resp.StatusCode == http.StatusUnauthorized {
tok, tokErr := c.Token.Refresh(ctx)
if tokErr != nil {
buf, _ := ioutil.ReadAll(resp.Body)
err = fmt.Errorf("%s : %w", string(buf), tokErr)
return
}
c.SetKeystoneToken(tok)
req.Header.Set("X-Auth-Token", c.keystoneToken)
resp, err = c.do(ctx, req)
}
if resp.StatusCode >= http.StatusBadRequest {
defer resp.Body.Close()
buf, _ := ioutil.ReadAll(resp.Body)
err = errorFromStatus(resp.StatusCode, string(buf))
}
return
}
// SetKeystoneToken sets keystone token value, which will be used for authentication.
func (c *Client) SetKeystoneToken(token *Token) {
c.keystoneToken = token.KeystoneToken
c.projectID = token.ProjectId
}
// ListOptions specifies the optional parameters for List method.
type ListOptions struct {
Page int `json:"page,omitempty"`
Limit int `json:"limit,omitempty"`
}
func errorFromStatus(code int, msg string) error {
switch code {
case http.StatusNotFound:
return fmt.Errorf("%s: %w", msg, ErrNotFound)
case http.StatusForbidden:
return fmt.Errorf("%s: %w", msg, ErrPermissionDenied)
default:
return fmt.Errorf("%s: %w", msg, ErrCommon)
}
}