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tunnel.go
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tunnel.go
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package cfapi
import (
"fmt"
"io"
"net"
"net/http"
"net/url"
"path"
"time"
"github.com/google/uuid"
"github.com/pkg/errors"
)
var ErrTunnelNameConflict = errors.New("tunnel with name already exists")
type Tunnel struct {
ID uuid.UUID `json:"id"`
Name string `json:"name"`
CreatedAt time.Time `json:"created_at"`
DeletedAt time.Time `json:"deleted_at"`
Connections []Connection `json:"connections"`
}
type TunnelWithToken struct {
Tunnel
Token string `json:"token"`
}
type Connection struct {
ColoName string `json:"colo_name"`
ID uuid.UUID `json:"id"`
IsPendingReconnect bool `json:"is_pending_reconnect"`
OriginIP net.IP `json:"origin_ip"`
OpenedAt time.Time `json:"opened_at"`
}
type ActiveClient struct {
ID uuid.UUID `json:"id"`
Features []string `json:"features"`
Version string `json:"version"`
Arch string `json:"arch"`
RunAt time.Time `json:"run_at"`
Connections []Connection `json:"conns"`
}
type newTunnel struct {
Name string `json:"name"`
TunnelSecret []byte `json:"tunnel_secret"`
}
type managementRequest struct {
Resources []string `json:"resources"`
}
type CleanupParams struct {
queryParams url.Values
}
func NewCleanupParams() *CleanupParams {
return &CleanupParams{
queryParams: url.Values{},
}
}
func (cp *CleanupParams) ForClient(clientID uuid.UUID) {
cp.queryParams.Set("client_id", clientID.String())
}
func (cp CleanupParams) encode() string {
return cp.queryParams.Encode()
}
func (r *RESTClient) CreateTunnel(name string, tunnelSecret []byte) (*TunnelWithToken, error) {
if name == "" {
return nil, errors.New("tunnel name required")
}
if _, err := uuid.Parse(name); err == nil {
return nil, errors.New("you cannot use UUIDs as tunnel names")
}
body := &newTunnel{
Name: name,
TunnelSecret: tunnelSecret,
}
resp, err := r.sendRequest("POST", r.baseEndpoints.accountLevel, body)
if err != nil {
return nil, errors.Wrap(err, "REST request failed")
}
defer resp.Body.Close()
switch resp.StatusCode {
case http.StatusOK:
var tunnel TunnelWithToken
if serdeErr := parseResponse(resp.Body, &tunnel); serdeErr != nil {
return nil, serdeErr
}
return &tunnel, nil
case http.StatusConflict:
return nil, ErrTunnelNameConflict
}
return nil, r.statusCodeToError("create tunnel", resp)
}
func (r *RESTClient) GetTunnel(tunnelID uuid.UUID) (*Tunnel, error) {
endpoint := r.baseEndpoints.accountLevel
endpoint.Path = path.Join(endpoint.Path, fmt.Sprintf("%v", tunnelID))
resp, err := r.sendRequest("GET", endpoint, nil)
if err != nil {
return nil, errors.Wrap(err, "REST request failed")
}
defer resp.Body.Close()
if resp.StatusCode == http.StatusOK {
return unmarshalTunnel(resp.Body)
}
return nil, r.statusCodeToError("get tunnel", resp)
}
func (r *RESTClient) GetTunnelToken(tunnelID uuid.UUID) (token string, err error) {
endpoint := r.baseEndpoints.accountLevel
endpoint.Path = path.Join(endpoint.Path, fmt.Sprintf("%v/token", tunnelID))
resp, err := r.sendRequest("GET", endpoint, nil)
if err != nil {
return "", errors.Wrap(err, "REST request failed")
}
defer resp.Body.Close()
if resp.StatusCode == http.StatusOK {
err = parseResponse(resp.Body, &token)
return token, err
}
return "", r.statusCodeToError("get tunnel token", resp)
}
func (r *RESTClient) GetManagementToken(tunnelID uuid.UUID) (token string, err error) {
endpoint := r.baseEndpoints.accountLevel
endpoint.Path = path.Join(endpoint.Path, fmt.Sprintf("%v/management", tunnelID))
body := &managementRequest{
Resources: []string{"logs"},
}
resp, err := r.sendRequest("POST", endpoint, body)
if err != nil {
return "", errors.Wrap(err, "REST request failed")
}
defer resp.Body.Close()
if resp.StatusCode == http.StatusOK {
err = parseResponse(resp.Body, &token)
return token, err
}
return "", r.statusCodeToError("get tunnel token", resp)
}
func (r *RESTClient) DeleteTunnel(tunnelID uuid.UUID, cascade bool) error {
endpoint := r.baseEndpoints.accountLevel
endpoint.Path = path.Join(endpoint.Path, fmt.Sprintf("%v", tunnelID))
// Cascade will delete all tunnel dependencies (connections, routes, etc.) that
// are linked to the deleted tunnel.
if cascade {
endpoint.RawQuery = "cascade=true"
}
resp, err := r.sendRequest("DELETE", endpoint, nil)
if err != nil {
return errors.Wrap(err, "REST request failed")
}
defer resp.Body.Close()
return r.statusCodeToError("delete tunnel", resp)
}
func (r *RESTClient) ListTunnels(filter *TunnelFilter) ([]*Tunnel, error) {
fetchFn := func(page int) (*http.Response, error) {
endpoint := r.baseEndpoints.accountLevel
filter.Page(page)
endpoint.RawQuery = filter.encode()
rsp, err := r.sendRequest("GET", endpoint, nil)
if err != nil {
return nil, errors.Wrap(err, "REST request failed")
}
if rsp.StatusCode != http.StatusOK {
rsp.Body.Close()
return nil, r.statusCodeToError("list tunnels", rsp)
}
return rsp, nil
}
return fetchExhaustively[Tunnel](fetchFn)
}
func (r *RESTClient) ListActiveClients(tunnelID uuid.UUID) ([]*ActiveClient, error) {
endpoint := r.baseEndpoints.accountLevel
endpoint.Path = path.Join(endpoint.Path, fmt.Sprintf("%v/connections", tunnelID))
resp, err := r.sendRequest("GET", endpoint, nil)
if err != nil {
return nil, errors.Wrap(err, "REST request failed")
}
defer resp.Body.Close()
if resp.StatusCode == http.StatusOK {
return parseConnectionsDetails(resp.Body)
}
return nil, r.statusCodeToError("list connection details", resp)
}
func parseConnectionsDetails(reader io.Reader) ([]*ActiveClient, error) {
var clients []*ActiveClient
err := parseResponse(reader, &clients)
return clients, err
}
func (r *RESTClient) CleanupConnections(tunnelID uuid.UUID, params *CleanupParams) error {
endpoint := r.baseEndpoints.accountLevel
endpoint.RawQuery = params.encode()
endpoint.Path = path.Join(endpoint.Path, fmt.Sprintf("%v/connections", tunnelID))
resp, err := r.sendRequest("DELETE", endpoint, nil)
if err != nil {
return errors.Wrap(err, "REST request failed")
}
defer resp.Body.Close()
return r.statusCodeToError("cleanup connections", resp)
}
func unmarshalTunnel(reader io.Reader) (*Tunnel, error) {
var tunnel Tunnel
err := parseResponse(reader, &tunnel)
return &tunnel, err
}