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manager.go
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manager.go
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// Copyright (c) Microsoft Corporation.
// Licensed under the MIT license.
package tunnels
import (
"bytes"
"context"
"crypto/tls"
"encoding/json"
"fmt"
"io"
"net/http"
"net/url"
"reflect"
"strconv"
"strings"
)
var ServiceProperties = TunnelServiceProperties{
ServiceURI: fmt.Sprintf("https://%s/", prodDnsName),
ServiceAppID: prodFirstPartyAppID,
ServiceInternalAppID: prodThirdPartyAppID,
GitHubAppClientID: prodGitHubAppClientID,
}
var PpeServiceProperties = TunnelServiceProperties{
ServiceURI: fmt.Sprintf("https://%s/", ppeDnsName),
ServiceAppID: nonProdFirstPartyAppID,
ServiceInternalAppID: ppeThirdPartyAppID,
GitHubAppClientID: nonProdGitHubAppClientID,
}
var DevServiceProperties = TunnelServiceProperties{
ServiceURI: fmt.Sprintf("https://%s/", devDnsName),
ServiceAppID: nonProdFirstPartyAppID,
ServiceInternalAppID: devThirdPartyAppID,
GitHubAppClientID: nonProdGitHubAppClientID,
}
type tokenProviderfn func() string
const (
apiV1Path = "/api/v1"
tunnelsApiPath = apiV1Path + "/tunnels"
subjectsApiPath = apiV1Path + "/subjects"
endpointsApiSubPath = "/endpoints"
portsApiSubPath = "/ports"
tunnelAuthenticationScheme = "Tunnel"
goUserAgent = "Visual-Studio-Tunnel-Service-Go-SDK/" + PackageVersion
)
var (
defaultServiceUrl = ServiceProperties.ServiceURI
)
var (
manageAccessTokenScope = []TunnelAccessScope{TunnelAccessScopeManage}
hostAccessTokenScope = []TunnelAccessScope{TunnelAccessScopeHost}
hostOrManageAccessTokenScope = []TunnelAccessScope{TunnelAccessScopeManage, TunnelAccessScopeHost}
readAccessTokenScope = []TunnelAccessScope{TunnelAccessScopeManage, TunnelAccessScopeHost, TunnelAccessScopeConnect}
)
// UserAgent contains the name and version of the client.
type UserAgent struct {
Name string
Version string
}
// Manager is used to interact with the Visual Studio Tunnel Service APIs.
type Manager struct {
tokenProvider tokenProviderfn
httpClient *http.Client
uri *url.URL
additionalHeaders map[string]string
userAgents []UserAgent
}
// Creates a new Manager used for interacting with the Tunnels APIs.
// tokenProvider is an optional paramater containing a function that returns the access token to use for the request.
// If no tunnelServiceUrl or httpClient is provided, the default values will be used.
// Can return error if userAgent is empty or url is invalid.
func NewManager(userAgents []UserAgent, tp tokenProviderfn, tunnelServiceUrl *url.URL, httpHandler *http.Client) (*Manager, error) {
if len(userAgents) == 0 {
return nil, fmt.Errorf("user agents cannot be empty")
}
if tp == nil {
tp = func() string {
return ""
}
}
if tunnelServiceUrl == nil {
url, err := url.Parse(defaultServiceUrl)
if err != nil {
return nil, fmt.Errorf("error parsing default url %w", err)
}
tunnelServiceUrl = url
}
var client *http.Client
if httpHandler == nil {
if strings.Contains(tunnelServiceUrl.Host, "localhost") {
client = &http.Client{Transport: &http.Transport{TLSClientConfig: &tls.Config{InsecureSkipVerify: true}}}
} else {
client = &http.Client{}
}
} else {
client = httpHandler
}
return &Manager{tokenProvider: tp, httpClient: client, uri: tunnelServiceUrl, userAgents: userAgents}, nil
}
// Lists all tunnels owned by the authenticated user.
// Returns a list of tunnels or an error if the search fails.
func (m *Manager) ListTunnels(
ctx context.Context, clusterID string, domain string, options *TunnelRequestOptions,
) (ts []*Tunnel, err error) {
queryParams := url.Values{}
if clusterID == "" {
queryParams.Add("global", "true")
}
if domain != "" {
queryParams.Add("domain", domain)
}
url := m.buildUri(clusterID, tunnelsApiPath, options, queryParams.Encode())
response, err := m.sendTunnelRequest(ctx, nil, options, http.MethodGet, url, nil, nil, readAccessTokenScope, false)
if err != nil {
return nil, fmt.Errorf("error sending list tunnel request: %w", err)
}
err = json.Unmarshal(response, &ts)
if err != nil {
return nil, fmt.Errorf("error parsing response json to tunnel: %w", err)
}
return ts, nil
}
// Search tunnels that the authenticated user has access to based on tags.
// If requireAllTags is true then tunnels returned must contain all tags in the tags slice.
// Returns a slice of the found tunnels or an error if the search fails.
func (m *Manager) SearchTunnels(
ctx context.Context, tags []string, requireAllTags bool, clusterID string, domain string, options *TunnelRequestOptions,
) (ts []*Tunnel, err error) {
queryParams := url.Values{}
if clusterID == "" {
queryParams.Add("global", "true")
}
if domain != "" {
queryParams.Add("domain", domain)
}
queryParams.Add("allTags", strconv.FormatBool(requireAllTags))
tagString := strings.Join(tags, ",")
queryParams.Add("tags", tagString)
url := m.buildUri(clusterID, tunnelsApiPath, options, queryParams.Encode())
response, err := m.sendTunnelRequest(ctx, nil, options, http.MethodGet, url, nil, nil, readAccessTokenScope, false)
if err != nil {
return nil, fmt.Errorf("error sending search tunnel request: %w", err)
}
err = json.Unmarshal(response, &ts)
if err != nil {
return nil, fmt.Errorf("error parsing response json to tunnel: %w", err)
}
return ts, nil
}
// Gets a tunnel by id or name.
// If getting a tunnel by name the domain must be provided if the tunnel is not in the default domain.
// Returns the requested tunnel or an error if the tunnel is not found.
func (m *Manager) GetTunnel(ctx context.Context, tunnel *Tunnel, options *TunnelRequestOptions) (t *Tunnel, err error) {
url, err := m.buildTunnelSpecificUri(tunnel, "", options, "")
if err != nil {
return nil, fmt.Errorf("error creating tunnel url: %w", err)
}
response, err := m.sendTunnelRequest(ctx, tunnel, options, http.MethodGet, url, nil, nil, readAccessTokenScope, true)
if err != nil {
return nil, fmt.Errorf("error sending get tunnel request: %w", err)
}
// Read response into a tunnel
err = json.Unmarshal(response, &t)
if err != nil {
return nil, fmt.Errorf("error parsing response json to tunnel: %w", err)
}
return t, err
}
// Creates a new tunnel with the properties specified in tunnel.
// Tunnel fields may be nil but the tunnel struct must not be nil.
// Returns the created tunnel or an error if the create fails.
func (m *Manager) CreateTunnel(ctx context.Context, tunnel *Tunnel, options *TunnelRequestOptions) (t *Tunnel, err error) {
if tunnel == nil {
return nil, fmt.Errorf("tunnel must be provided")
}
if tunnel.TunnelID != "" {
return nil, fmt.Errorf("tunnelId cannot be set for creating a tunnel")
}
url := m.buildUri(tunnel.ClusterID, tunnelsApiPath, options, "")
convertedTunnel, err := tunnel.requestObject()
if err != nil {
return nil, fmt.Errorf("error converting tunnel for request: %w", err)
}
response, err := m.sendTunnelRequest(ctx, tunnel, options, http.MethodPost, url, convertedTunnel, nil, manageAccessTokenScope, false)
if err != nil {
return nil, fmt.Errorf("error sending create tunnel request: %w", err)
}
// Read response into a tunnel
err = json.Unmarshal(response, &t)
if err != nil {
return nil, fmt.Errorf("error parsing response json to tunnel: %w", err)
}
return t, err
}
// Updates a tunnel's properties, to update a field the field name must be included in updateFields.
// Returns the updated tunnel or an error if the update fails.
func (m *Manager) UpdateTunnel(ctx context.Context, tunnel *Tunnel, updateFields []string, options *TunnelRequestOptions) (t *Tunnel, err error) {
if tunnel == nil {
return nil, fmt.Errorf("tunnel must be provided")
}
url, err := m.buildTunnelSpecificUri(tunnel, "", options, "")
if err != nil {
return nil, fmt.Errorf("error creating request url: %w", err)
}
convertedTunnel, err := tunnel.requestObject()
if err != nil {
return nil, fmt.Errorf("error converting tunnel for request: %w", err)
}
response, err := m.sendTunnelRequest(ctx, tunnel, options, http.MethodPut, url, convertedTunnel, updateFields, manageAccessTokenScope, false)
if err != nil {
return nil, fmt.Errorf("error sending update tunnel request: %w", err)
}
// Read response into a tunnel
err = json.Unmarshal(response, &t)
if err != nil {
return nil, fmt.Errorf("error parsing response json to tunnel: %w", err)
}
return t, err
}
// Deletes a tunnel.
// Returns error if delete fails.
func (m *Manager) DeleteTunnel(ctx context.Context, tunnel *Tunnel, options *TunnelRequestOptions) error {
url, err := m.buildTunnelSpecificUri(tunnel, "", options, "")
if err != nil {
return fmt.Errorf("error creating tunnel url: %w", err)
}
_, err = m.sendTunnelRequest(ctx, tunnel, options, http.MethodDelete, url, nil, nil, manageAccessTokenScope, true)
if err != nil {
return fmt.Errorf("error sending delete tunnel request: %w", err)
}
return nil
}
// Updates an endpoint on a tunnel.
// Returns the updated endpoint or an error if the update fails.
func (m *Manager) UpdateTunnelEndpoint(
ctx context.Context, tunnel *Tunnel, endpoint *TunnelEndpoint, updateFields []string, options *TunnelRequestOptions,
) (te *TunnelEndpoint, err error) {
if endpoint == nil {
return nil, fmt.Errorf("endpoint must be provided and must not be nil")
}
if endpoint.HostID == "" {
return nil, fmt.Errorf("endpoint hostId must be provided and must not be nil")
}
url, err := m.buildTunnelSpecificUri(tunnel, fmt.Sprintf("%s/%s/%s", endpointsApiSubPath, endpoint.HostID, endpoint.ConnectionMode), options, "")
if err != nil {
return nil, fmt.Errorf("error creating tunnel url: %w", err)
}
response, err := m.sendTunnelRequest(ctx, tunnel, options, http.MethodPut, url, endpoint, updateFields, hostAccessTokenScope, false)
if err != nil {
return nil, fmt.Errorf("error sending update tunnel endpoint request: %w", err)
}
// Read response into a tunnel endpoint
err = json.Unmarshal(response, &te)
if err != nil {
return nil, fmt.Errorf("error parsing response json to tunnel: %w", err)
}
var newEndpoints []TunnelEndpoint
for _, ep := range tunnel.Endpoints {
if ep.HostID != endpoint.HostID || ep.ConnectionMode != endpoint.ConnectionMode {
newEndpoints = append(newEndpoints, ep)
}
}
newEndpoints = append(newEndpoints, *te)
tunnel.Endpoints = newEndpoints
return te, err
}
// Deletes endpoints on a tunnel.
// Returns error if the delete fails.
func (m *Manager) DeleteTunnelEndpoints(
ctx context.Context, tunnel *Tunnel, hostID string, connectionMode TunnelConnectionMode, options *TunnelRequestOptions,
) error {
if hostID == "" {
return fmt.Errorf("hostId must be provided and must not be nil")
}
path := fmt.Sprintf("%s/%s/%s", endpointsApiSubPath, hostID, connectionMode)
if connectionMode == "" {
path = fmt.Sprintf("%s/%s", endpointsApiSubPath, hostID)
}
url, err := m.buildTunnelSpecificUri(tunnel, path, options, "")
if err != nil {
return fmt.Errorf("error creating tunnel url: %w", err)
}
_, err = m.sendTunnelRequest(ctx, tunnel, options, http.MethodDelete, url, nil, nil, hostAccessTokenScope, true)
if err != nil {
return fmt.Errorf("error sending delete tunnel endpoint request: %w", err)
}
var newEndpoints []TunnelEndpoint
for _, ep := range tunnel.Endpoints {
if ep.HostID != hostID || ep.ConnectionMode != connectionMode {
newEndpoints = append(newEndpoints, ep)
}
}
tunnel.Endpoints = newEndpoints
return err
}
// Lists all ports on the tunnel.
func (m *Manager) ListTunnelPorts(
ctx context.Context, tunnel *Tunnel, options *TunnelRequestOptions,
) (tp []*TunnelPort, err error) {
url, err := m.buildTunnelSpecificUri(tunnel, portsApiSubPath, options, "")
if err != nil {
return nil, fmt.Errorf("error creating tunnel url: %w", err)
}
response, err := m.sendTunnelRequest(ctx, tunnel, options, http.MethodGet, url, nil, nil, readAccessTokenScope, false)
if err != nil {
return nil, fmt.Errorf("error sending list tunnel ports request: %w", err)
}
// Read response into a tunnel port
err = json.Unmarshal(response, &tp)
if err != nil {
return nil, fmt.Errorf("error parsing response json to tunnel ports: %w", err)
}
return tp, nil
}
func (m *Manager) GetTunnelPort(
ctx context.Context, tunnel *Tunnel, port int, options *TunnelRequestOptions,
) (tp *TunnelPort, err error) {
url, err := m.buildTunnelSpecificUri(tunnel, fmt.Sprintf("%s/%d", portsApiSubPath, port), options, "")
if err != nil {
return nil, fmt.Errorf("error creating tunnel url: %w", err)
}
response, err := m.sendTunnelRequest(ctx, tunnel, options, http.MethodGet, url, nil, nil, readAccessTokenScope, true)
if err != nil {
return nil, fmt.Errorf("error sending get tunnel port request: %w", err)
}
// Read response into a tunnel port
err = json.Unmarshal(response, &tp)
if err != nil {
return nil, fmt.Errorf("error parsing response json to tunnel ports: %w", err)
}
return tp, nil
}
// Creates a port on the tunnel.
// Returns the created port or error if create fails.
func (m *Manager) CreateTunnelPort(
ctx context.Context, tunnel *Tunnel, port *TunnelPort, options *TunnelRequestOptions,
) (tp *TunnelPort, err error) {
url, err := m.buildTunnelSpecificUri(tunnel, portsApiSubPath, options, "")
if err != nil {
return nil, fmt.Errorf("error creating tunnel url: %w", err)
}
convertedPort, err := port.requestObject(tunnel)
if err != nil {
return nil, fmt.Errorf("error converting port for request: %w", err)
}
response, err := m.sendTunnelRequest(ctx, tunnel, options, http.MethodPost, url, convertedPort, nil, hostOrManageAccessTokenScope, true)
if err != nil {
return nil, fmt.Errorf("error sending create tunnel port request: %w", err)
}
// Read response into a tunnel port
err = json.Unmarshal(response, &tp)
if err != nil {
return nil, fmt.Errorf("error parsing response json to tunnel port: %w", err)
}
// Updated local tunnel ports
var newPorts []TunnelPort
for _, p := range tunnel.Ports {
if p.PortNumber != tp.PortNumber {
newPorts = append(newPorts, p)
}
}
newPorts = append(newPorts, *tp)
tunnel.Ports = newPorts
return tp, nil
}
// Updates a tunnel port.
// Returns the updated port or an error if the update fails.
func (m *Manager) UpdateTunnelPort(
ctx context.Context, tunnel *Tunnel, port *TunnelPort, updateFields []string, options *TunnelRequestOptions,
) (tp *TunnelPort, err error) {
if port.ClusterID != "" && tunnel.ClusterID != "" && port.ClusterID != tunnel.ClusterID {
return nil, fmt.Errorf("cluster ids do not match")
}
path := fmt.Sprintf("%s/%d", portsApiSubPath, port.PortNumber)
url, err := m.buildTunnelSpecificUri(tunnel, path, options, "")
if err != nil {
return nil, fmt.Errorf("error creating tunnel url: %w", err)
}
convertedPort, err := port.requestObject(tunnel)
if err != nil {
return nil, fmt.Errorf("error converting port for request: %w", err)
}
response, err := m.sendTunnelRequest(ctx, tunnel, options, http.MethodPut, url, convertedPort, updateFields, hostOrManageAccessTokenScope, true)
if err != nil {
return nil, fmt.Errorf("error sending update tunnel port request: %w", err)
}
// Read response into a tunnel port
err = json.Unmarshal(response, &tp)
if err != nil {
return nil, fmt.Errorf("error parsing response json to tunnel port: %w", err)
}
// Updated local tunnel ports
var newPorts []TunnelPort
for _, p := range tunnel.Ports {
if p.PortNumber != tp.PortNumber {
newPorts = append(newPorts, p)
}
}
newPorts = append(newPorts, *tp)
tunnel.Ports = newPorts
return tp, nil
}
// Deletes a tunnel port.
// Returns error if the delete fails.
func (m *Manager) DeleteTunnelPort(
ctx context.Context, tunnel *Tunnel, port uint16, options *TunnelRequestOptions,
) error {
path := fmt.Sprintf("%s/%d", portsApiSubPath, port)
url, err := m.buildTunnelSpecificUri(tunnel, path, options, "")
if err != nil {
return fmt.Errorf("error creating tunnel url: %w", err)
}
_, err = m.sendTunnelRequest(ctx, tunnel, options, http.MethodDelete, url, nil, nil, hostOrManageAccessTokenScope, true)
if err != nil {
return fmt.Errorf("error sending get tunnel request: %w", err)
}
// Updated local tunnel ports
var newPorts []TunnelPort
for _, p := range tunnel.Ports {
if p.PortNumber != port {
newPorts = append(newPorts, p)
}
}
tunnel.Ports = newPorts
return nil
}
func (m *Manager) sendTunnelRequest(
ctx context.Context,
tunnel *Tunnel,
tunnelRequestOptions *TunnelRequestOptions,
method string,
uri *url.URL,
requestObject interface{},
partialFields []string,
accessTokenScopes []TunnelAccessScope,
allowNotFound bool,
) ([]byte, error) {
tunnelJson, err := partialMarshal(requestObject, partialFields)
if err != nil {
return nil, fmt.Errorf("error converting tunnel to json: %w", err)
}
request, err := http.NewRequest(method, uri.String(), bytes.NewBuffer(tunnelJson))
if err != nil {
return nil, fmt.Errorf("error creating tunnel request request: %w", err)
}
//Add authorization header
if token := m.getAccessToken(tunnel, tunnelRequestOptions, accessTokenScopes); token != "" {
request.Header.Add("Authorization", token)
}
userAgentString := ""
for _, userAgent := range m.userAgents {
if len(userAgent.Version) == 0 {
userAgent.Version = "unknown"
}
if len(userAgent.Name) == 0 {
return nil, fmt.Errorf("userAgent name cannot be empty")
}
userAgentString = fmt.Sprintf("%s%s/%s ", userAgentString, userAgent.Name, userAgent.Version)
}
userAgentString = strings.TrimSpace(userAgentString)
request.Header.Add("User-Agent", fmt.Sprintf("%s %s", goUserAgent, userAgentString))
request.Header.Add("Content-Type", "application/json;charset=UTF-8")
// Add additional headers
for header, headerValue := range m.additionalHeaders {
request.Header.Add(header, headerValue)
}
for header, headerValue := range tunnelRequestOptions.AdditionalHeaders {
request.Header.Add(header, headerValue)
}
result, err := m.httpClient.Do(request)
if err != nil {
return nil, fmt.Errorf("error sending request: %w", err)
}
defer result.Body.Close()
// Handle non 200s responses
if result.StatusCode > 300 {
errorMessage, err := m.readProblemDetails(result)
if err == nil && errorMessage != nil {
return nil, fmt.Errorf("unsuccessful request, response: %d %s\n\t%s",
result.StatusCode, http.StatusText(result.StatusCode), *errorMessage)
} else {
return nil, fmt.Errorf("unsuccessful request, response: %d: %s",
result.StatusCode, http.StatusText(result.StatusCode))
}
}
return io.ReadAll(result.Body)
}
func (m *Manager) readProblemDetails(response *http.Response) (*string, error) {
errorBody, err := io.ReadAll(response.Body)
if err != nil {
return nil, fmt.Errorf("failed to read response body")
}
var problemDetails *ProblemDetails
err = json.Unmarshal(errorBody, &problemDetails)
if err != nil {
return nil, fmt.Errorf("failed to unmarshal ProblemDetails")
}
if problemDetails.Title == "" && problemDetails.Detail == "" {
return nil, fmt.Errorf("empty ProblemDetails")
}
var errorMessage string
if problemDetails.Title != "" {
errorMessage += problemDetails.Title
}
if problemDetails.Detail != "" {
if len(errorMessage) > 0 {
errorMessage += " "
}
errorMessage += problemDetails.Detail
}
for errorKey, errorDetail := range problemDetails.Errors {
errorMessage += "\n\t" + errorKey + ": "
for _, errorDetailMessage := range errorDetail {
errorMessage += " "
errorMessage += errorDetailMessage
}
}
return &errorMessage, nil
}
func (m *Manager) getAccessToken(tunnel *Tunnel, tunnelRequestOptions *TunnelRequestOptions, scopes []TunnelAccessScope) (token string) {
if tunnelRequestOptions.AccessToken != "" {
token = fmt.Sprintf("%s %s", tunnelAuthenticationScheme, tunnelRequestOptions.AccessToken)
}
if token == "" {
token = m.tokenProvider()
}
if token == "" && tunnel != nil {
for _, scope := range scopes {
if tunnelToken, ok := tunnel.AccessTokens[scope]; ok {
token = fmt.Sprintf("%s %s", tunnelAuthenticationScheme, tunnelToken)
}
}
}
return token
}
func (m *Manager) buildUri(clusterId string, path string, options *TunnelRequestOptions, query string) *url.URL {
baseAddress := m.uri
if clusterId != "" {
if !strings.HasPrefix(baseAddress.Host, "localhost") && !strings.HasPrefix(baseAddress.Host, clusterId) {
// A specific cluster ID was specified (while not running on localhost).
// Prepend the cluster ID to the hostname, and optionally strip a global prefix.
baseAddress.Host = fmt.Sprintf("%s.%s", clusterId, baseAddress.Host)
baseAddress.Host = strings.Replace(baseAddress.Host, "global.", "", 1)
}
}
if options != nil {
optionsQuery := options.queryString()
if optionsQuery != "" {
if query != "" {
query = fmt.Sprintf("%s&%s", query, optionsQuery)
} else {
query = optionsQuery
}
}
}
baseAddress.Path = path
baseAddress.RawQuery = query
return baseAddress
}
func (m *Manager) buildTunnelSpecificUri(tunnel *Tunnel, path string, options *TunnelRequestOptions, query string) (*url.URL, error) {
var tunnelPath string
if tunnel == nil {
return nil, fmt.Errorf("tunnel cannot be nil to make uri")
}
switch {
case tunnel.ClusterID != "" && tunnel.TunnelID != "":
tunnelPath = fmt.Sprintf("%s/%s", tunnelsApiPath, tunnel.TunnelID)
case tunnel.Name != "":
tunnelPath = fmt.Sprintf("%s/%s", tunnelsApiPath, tunnel.Name)
if tunnel.Domain != "" {
tunnelPath = fmt.Sprintf("%s/%s.%s", tunnelsApiPath, tunnel.Name, tunnel.Domain)
}
default:
return nil, fmt.Errorf("tunnel must have either a name or cluster id and tunnel id")
}
return m.buildUri(tunnel.ClusterID, tunnelPath+path, options, query), nil
}
// The omitempty JSON tags on string fields make it impossible to intentionally supply
// empty string values when updating. As a workaround, this method marshals a given
// list of fields regardless of whether they are empty.
func partialMarshal(value interface{}, fields []string) ([]byte, error) {
if len(fields) == 0 {
return json.Marshal(value)
}
reflectValue := reflect.Indirect(reflect.ValueOf(value))
reflectType := reflectValue.Type()
m := map[string]interface{}{}
for _, name := range fields {
field, found := reflectType.FieldByName(name)
if !found {
return nil, fmt.Errorf("field '%s' not found in type '%s'", name, reflectType.Name())
}
jsonKey := strings.Split(field.Tag.Get("json"), ",")[0]
value := reflectValue.FieldByIndex(field.Index).Interface()
m[jsonKey] = value
}
return json.Marshal(m)
}