package remote import ( "bytes" "crypto/md5" "encoding/base64" "fmt" "io" "net/http" "net/url" "path" "strings" ) const ( // defaultAtlasServer is used when no address is given defaultAtlasServer = "https://atlas.hashicorp.com/" ) // AtlasRemoteClient implements the RemoteClient interface // for an Atlas compatible server. type AtlasRemoteClient struct { server string serverURL *url.URL user string name string accessToken string } func NewAtlasRemoteClient(conf map[string]string) (*AtlasRemoteClient, error) { client := &AtlasRemoteClient{} if err := client.validateConfig(conf); err != nil { return nil, err } return client, nil } func (c *AtlasRemoteClient) validateConfig(conf map[string]string) error { server, ok := conf["server"] if !ok || server == "" { server = defaultAtlasServer } url, err := url.Parse(server) if err != nil { return err } c.server = server c.serverURL = url token, ok := conf["access_token"] if !ok || token == "" { return fmt.Errorf("missing 'access_token' configuration") } c.accessToken = token name, ok := conf["name"] if !ok || name == "" { return fmt.Errorf("missing 'name' configuration") } parts := strings.Split(name, "/") if len(parts) != 2 { return fmt.Errorf("malformed name '%s'", name) } c.user = parts[0] c.name = parts[1] return nil } func (c *AtlasRemoteClient) GetState() (*RemoteStatePayload, error) { // Make the HTTP request req, err := http.NewRequest("GET", c.url().String(), nil) if err != nil { return nil, fmt.Errorf("Failed to make HTTP request: %v", err) } // Request the url resp, err := http.DefaultClient.Do(req) if err != nil { return nil, err } defer resp.Body.Close() // Handle the common status codes switch resp.StatusCode { case http.StatusOK: // Handled after case http.StatusNoContent: return nil, nil case http.StatusNotFound: return nil, nil case http.StatusUnauthorized: return nil, ErrRequireAuth case http.StatusForbidden: return nil, ErrInvalidAuth case http.StatusInternalServerError: return nil, ErrRemoteInternal default: return nil, fmt.Errorf("Unexpected HTTP response code %d", resp.StatusCode) } // Read in the body buf := bytes.NewBuffer(nil) if _, err := io.Copy(buf, resp.Body); err != nil { return nil, fmt.Errorf("Failed to read remote state: %v", err) } // Create the payload payload := &RemoteStatePayload{ State: buf.Bytes(), } // Check for the MD5 if raw := resp.Header.Get("Content-MD5"); raw != "" { md5, err := base64.StdEncoding.DecodeString(raw) if err != nil { return nil, fmt.Errorf("Failed to decode Content-MD5 '%s': %v", raw, err) } payload.MD5 = md5 } else { // Generate the MD5 hash := md5.Sum(payload.State) payload.MD5 = hash[:md5.Size] } return payload, nil } func (c *AtlasRemoteClient) PutState(state []byte, force bool) error { // Get the target URL base := c.url() // Generate the MD5 hash := md5.Sum(state) b64 := base64.StdEncoding.EncodeToString(hash[:md5.Size]) // Set the force query parameter if needed if force { values := base.Query() values.Set("force", "true") base.RawQuery = values.Encode() } // Make the HTTP client and request req, err := http.NewRequest("PUT", base.String(), bytes.NewReader(state)) if err != nil { return fmt.Errorf("Failed to make HTTP request: %v", err) } // Prepare the request req.Header.Set("Content-MD5", b64) req.Header.Set("Content-Type", "application/json") req.ContentLength = int64(len(state)) // Make the request resp, err := http.DefaultClient.Do(req) if err != nil { return fmt.Errorf("Failed to upload state: %v", err) } defer resp.Body.Close() // Handle the error codes switch resp.StatusCode { case http.StatusOK: return nil case http.StatusConflict: return ErrConflict case http.StatusPreconditionFailed: return ErrServerNewer case http.StatusUnauthorized: return ErrRequireAuth case http.StatusForbidden: return ErrInvalidAuth case http.StatusInternalServerError: return ErrRemoteInternal default: return fmt.Errorf("Unexpected HTTP response code %d", resp.StatusCode) } } func (c *AtlasRemoteClient) DeleteState() error { // Make the HTTP request req, err := http.NewRequest("DELETE", c.url().String(), nil) if err != nil { return fmt.Errorf("Failed to make HTTP request: %v", err) } // Make the request resp, err := http.DefaultClient.Do(req) if err != nil { return fmt.Errorf("Failed to delete state: %v", err) } defer resp.Body.Close() // Handle the error codes switch resp.StatusCode { case http.StatusOK: return nil case http.StatusNoContent: return nil case http.StatusNotFound: return nil case http.StatusUnauthorized: return ErrRequireAuth case http.StatusForbidden: return ErrInvalidAuth case http.StatusInternalServerError: return ErrRemoteInternal default: return fmt.Errorf("Unexpected HTTP response code %d", resp.StatusCode) } return nil } func (c *AtlasRemoteClient) url() *url.URL { return &url.URL{ Scheme: c.serverURL.Scheme, Host: c.serverURL.Host, Path: path.Join("api/v1/state", c.user, c.name), RawQuery: fmt.Sprintf("access_token=%s", c.accessToken), } }