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plugin.go
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plugin.go
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// Copyright (c) 2017-present Mattermost, Inc. All Rights Reserved.
// See License.txt for license information.
package app
import (
"net/http"
"os"
"path/filepath"
"sort"
"strings"
"github.com/mattermost/mattermost-server/v5/mlog"
"github.com/mattermost/mattermost-server/v5/model"
"github.com/mattermost/mattermost-server/v5/plugin"
"github.com/mattermost/mattermost-server/v5/services/filesstore"
"github.com/mattermost/mattermost-server/v5/services/marketplace"
"github.com/mattermost/mattermost-server/v5/utils/fileutils"
"github.com/pkg/errors"
)
type pluginSignaturePath struct {
pluginId string
path string
signaturePath string
}
// GetPluginsEnvironment returns the plugin environment for use if plugins are enabled and
// initialized.
//
// To get the plugins environment when the plugins are disabled, manually acquire the plugins
// lock instead.
func (a *App) GetPluginsEnvironment() *plugin.Environment {
if !*a.Config().PluginSettings.Enable {
return nil
}
a.Srv.PluginsLock.RLock()
defer a.Srv.PluginsLock.RUnlock()
return a.Srv.PluginsEnvironment
}
func (a *App) SetPluginsEnvironment(pluginsEnvironment *plugin.Environment) {
a.Srv.PluginsLock.Lock()
defer a.Srv.PluginsLock.Unlock()
a.Srv.PluginsEnvironment = pluginsEnvironment
}
func (a *App) SyncPluginsActiveState() {
// Acquiring lock manually, as plugins might be disabled. See GetPluginsEnvironment.
a.Srv.PluginsLock.RLock()
pluginsEnvironment := a.Srv.PluginsEnvironment
a.Srv.PluginsLock.RUnlock()
if pluginsEnvironment == nil {
return
}
config := a.Config().PluginSettings
if *config.Enable {
availablePlugins, err := pluginsEnvironment.Available()
if err != nil {
a.Log.Error("Unable to get available plugins", mlog.Err(err))
return
}
// Deactivate any plugins that have been disabled.
for _, plugin := range availablePlugins {
// Determine if plugin is enabled
pluginId := plugin.Manifest.Id
pluginEnabled := false
if state, ok := config.PluginStates[pluginId]; ok {
pluginEnabled = state.Enable
}
// If it's not enabled we need to deactivate it
if !pluginEnabled {
deactivated := pluginsEnvironment.Deactivate(pluginId)
if deactivated && plugin.Manifest.HasClient() {
message := model.NewWebSocketEvent(model.WEBSOCKET_EVENT_PLUGIN_DISABLED, "", "", "", nil)
message.Add("manifest", plugin.Manifest.ClientManifest())
a.Publish(message)
}
}
}
// Activate any plugins that have been enabled
for _, plugin := range availablePlugins {
if plugin.Manifest == nil {
plugin.WrapLogger(a.Log).Error("Plugin manifest could not be loaded", mlog.Err(plugin.ManifestError))
continue
}
// Determine if plugin is enabled
pluginId := plugin.Manifest.Id
pluginEnabled := false
if state, ok := config.PluginStates[pluginId]; ok {
pluginEnabled = state.Enable
}
// Activate plugin if enabled
if pluginEnabled {
updatedManifest, activated, err := pluginsEnvironment.Activate(pluginId)
if err != nil {
plugin.WrapLogger(a.Log).Error("Unable to activate plugin", mlog.Err(err))
continue
}
if activated {
// Notify all cluster clients if ready
if err := a.notifyPluginEnabled(updatedManifest); err != nil {
a.Log.Error("Failed to notify cluster on plugin enable", mlog.Err(err))
}
}
}
}
} else { // If plugins are disabled, shutdown plugins.
pluginsEnvironment.Shutdown()
}
if err := a.notifyPluginStatusesChanged(); err != nil {
mlog.Error("failed to notify plugin status changed", mlog.Err(err))
}
}
func (a *App) NewPluginAPI(manifest *model.Manifest) plugin.API {
return NewPluginAPI(a, manifest)
}
func (a *App) InitPlugins(pluginDir, webappPluginDir string) {
// Acquiring lock manually, as plugins might be disabled. See GetPluginsEnvironment.
a.Srv.PluginsLock.RLock()
pluginsEnvironment := a.Srv.PluginsEnvironment
a.Srv.PluginsLock.RUnlock()
if pluginsEnvironment != nil || !*a.Config().PluginSettings.Enable {
a.SyncPluginsActiveState()
return
}
a.Log.Info("Starting up plugins")
if err := os.Mkdir(pluginDir, 0744); err != nil && !os.IsExist(err) {
mlog.Error("Failed to start up plugins", mlog.Err(err))
return
}
if err := os.Mkdir(webappPluginDir, 0744); err != nil && !os.IsExist(err) {
mlog.Error("Failed to start up plugins", mlog.Err(err))
return
}
env, err := plugin.NewEnvironment(a.NewPluginAPI, pluginDir, webappPluginDir, a.Log)
if err != nil {
mlog.Error("Failed to start up plugins", mlog.Err(err))
return
}
a.SetPluginsEnvironment(env)
if err := a.SyncPlugins(); err != nil {
mlog.Error("Failed to sync plugins from the file store", mlog.Err(err))
}
prepackagedPluginsDir, found := fileutils.FindDir("prepackaged_plugins")
if found {
if err := filepath.Walk(prepackagedPluginsDir, func(walkPath string, info os.FileInfo, err error) error {
if !strings.HasSuffix(walkPath, ".tar.gz") {
return nil
}
fileReader, err := os.Open(walkPath)
if err != nil {
mlog.Error("Failed to open prepackaged plugin", mlog.Err(err), mlog.String("path", walkPath))
return nil
}
defer fileReader.Close()
mlog.Debug("Installing prepackaged plugin", mlog.String("path", walkPath))
_, appErr := a.installPluginLocally(fileReader, nil, installPluginLocallyOnlyIfNewOrUpgrade)
if appErr != nil {
mlog.Error("Failed to unpack prepackaged plugin", mlog.Err(appErr), mlog.String("path", walkPath))
}
return nil
}); err != nil {
mlog.Error("Failed to complete unpacking prepackaged plugins", mlog.Err(err))
}
}
// Sync plugin active state when config changes. Also notify plugins.
a.Srv.PluginsLock.Lock()
a.RemoveConfigListener(a.Srv.PluginConfigListenerId)
a.Srv.PluginConfigListenerId = a.AddConfigListener(func(*model.Config, *model.Config) {
a.SyncPluginsActiveState()
if pluginsEnvironment := a.GetPluginsEnvironment(); pluginsEnvironment != nil {
pluginsEnvironment.RunMultiPluginHook(func(hooks plugin.Hooks) bool {
hooks.OnConfigurationChange()
return true
}, plugin.OnConfigurationChangeId)
}
})
a.Srv.PluginsLock.Unlock()
a.SyncPluginsActiveState()
}
// SyncPlugins synchronizes the plugins installed locally
// with the plugin bundles available in the file store.
func (a *App) SyncPlugins() *model.AppError {
mlog.Info("Syncing plugins from the file store")
pluginsEnvironment := a.GetPluginsEnvironment()
if pluginsEnvironment == nil {
return model.NewAppError("SyncPlugins", "app.plugin.disabled.app_error", nil, "", http.StatusNotImplemented)
}
availablePlugins, err := pluginsEnvironment.Available()
if err != nil {
return model.NewAppError("SyncPlugins", "app.plugin.sync.read_local_folder.app_error", nil, err.Error(), http.StatusInternalServerError)
}
for _, plugin := range availablePlugins {
pluginId := plugin.Manifest.Id
// Only handle managed plugins with .filestore flag file.
_, err := os.Stat(filepath.Join(*a.Config().PluginSettings.Directory, pluginId, managedPluginFileName))
if os.IsNotExist(err) {
mlog.Warn("Skipping sync for unmanaged plugin", mlog.String("plugin_id", pluginId))
} else if err != nil {
mlog.Error("Skipping sync for plugin after failure to check if managed", mlog.String("plugin_id", pluginId), mlog.Err(err))
} else {
mlog.Debug("Removing local installation of managed plugin before sync", mlog.String("plugin_id", pluginId))
if err := a.removePluginLocally(pluginId); err != nil {
mlog.Error("Failed to remove local installation of managed plugin before sync", mlog.String("plugin_id", pluginId), mlog.Err(err))
}
}
}
// Install plugins from the file store.
pluginSignaturePathMap, appErr := a.getPluginsFromFolder()
if appErr != nil {
return appErr
}
for _, plugin := range pluginSignaturePathMap {
reader, appErr := a.FileReader(plugin.path)
if appErr != nil {
mlog.Error("Failed to open plugin bundle from file store.", mlog.String("bundle", plugin.path), mlog.Err(appErr))
continue
}
defer reader.Close()
var signature filesstore.ReadCloseSeeker
if *a.Config().PluginSettings.RequirePluginSignature {
signature, appErr = a.FileReader(plugin.signaturePath)
if appErr != nil {
mlog.Error("Failed to open plugin signature from file store.", mlog.Err(appErr))
continue
}
defer signature.Close()
}
mlog.Info("Syncing plugin from file store", mlog.String("bundle", plugin.path))
if _, err := a.installPluginLocally(reader, signature, installPluginLocallyAlways); err != nil {
mlog.Error("Failed to sync plugin from file store", mlog.String("bundle", plugin.path), mlog.Err(err))
}
}
return nil
}
func (a *App) ShutDownPlugins() {
pluginsEnvironment := a.GetPluginsEnvironment()
if pluginsEnvironment == nil {
return
}
mlog.Info("Shutting down plugins")
pluginsEnvironment.Shutdown()
a.RemoveConfigListener(a.Srv.PluginConfigListenerId)
a.Srv.PluginConfigListenerId = ""
// Acquiring lock manually before cleaning up PluginsEnvironment.
a.Srv.PluginsLock.Lock()
defer a.Srv.PluginsLock.Unlock()
if a.Srv.PluginsEnvironment == pluginsEnvironment {
a.Srv.PluginsEnvironment = nil
} else {
mlog.Warn("Another PluginsEnvironment detected while shutting down plugins.")
}
}
func (a *App) GetActivePluginManifests() ([]*model.Manifest, *model.AppError) {
pluginsEnvironment := a.GetPluginsEnvironment()
if pluginsEnvironment == nil {
return nil, model.NewAppError("GetActivePluginManifests", "app.plugin.disabled.app_error", nil, "", http.StatusNotImplemented)
}
plugins := pluginsEnvironment.Active()
manifests := make([]*model.Manifest, len(plugins))
for i, plugin := range plugins {
manifests[i] = plugin.Manifest
}
return manifests, nil
}
// EnablePlugin will set the config for an installed plugin to enabled, triggering asynchronous
// activation if inactive anywhere in the cluster.
// Notifies cluster peers through config change.
func (a *App) EnablePlugin(id string) *model.AppError {
pluginsEnvironment := a.GetPluginsEnvironment()
if pluginsEnvironment == nil {
return model.NewAppError("EnablePlugin", "app.plugin.disabled.app_error", nil, "", http.StatusNotImplemented)
}
plugins, err := pluginsEnvironment.Available()
if err != nil {
return model.NewAppError("EnablePlugin", "app.plugin.config.app_error", nil, err.Error(), http.StatusInternalServerError)
}
id = strings.ToLower(id)
var manifest *model.Manifest
for _, p := range plugins {
if p.Manifest.Id == id {
manifest = p.Manifest
break
}
}
if manifest == nil {
return model.NewAppError("EnablePlugin", "app.plugin.not_installed.app_error", nil, "", http.StatusNotFound)
}
a.UpdateConfig(func(cfg *model.Config) {
cfg.PluginSettings.PluginStates[id] = &model.PluginState{Enable: true}
})
// This call will implicitly invoke SyncPluginsActiveState which will activate enabled plugins.
if err := a.SaveConfig(a.Config(), true); err != nil {
if err.Id == "ent.cluster.save_config.error" {
return model.NewAppError("EnablePlugin", "app.plugin.cluster.save_config.app_error", nil, "", http.StatusInternalServerError)
}
return model.NewAppError("EnablePlugin", "app.plugin.config.app_error", nil, err.Error(), http.StatusInternalServerError)
}
return nil
}
// DisablePlugin will set the config for an installed plugin to disabled, triggering deactivation if active.
// Notifies cluster peers through config change.
func (a *App) DisablePlugin(id string) *model.AppError {
pluginsEnvironment := a.GetPluginsEnvironment()
if pluginsEnvironment == nil {
return model.NewAppError("DisablePlugin", "app.plugin.disabled.app_error", nil, "", http.StatusNotImplemented)
}
plugins, err := pluginsEnvironment.Available()
if err != nil {
return model.NewAppError("DisablePlugin", "app.plugin.config.app_error", nil, err.Error(), http.StatusInternalServerError)
}
id = strings.ToLower(id)
var manifest *model.Manifest
for _, p := range plugins {
if p.Manifest.Id == id {
manifest = p.Manifest
break
}
}
if manifest == nil {
return model.NewAppError("DisablePlugin", "app.plugin.not_installed.app_error", nil, "", http.StatusNotFound)
}
a.UpdateConfig(func(cfg *model.Config) {
cfg.PluginSettings.PluginStates[id] = &model.PluginState{Enable: false}
})
a.UnregisterPluginCommands(id)
// This call will implicitly invoke SyncPluginsActiveState which will deactivate disabled plugins.
if err := a.SaveConfig(a.Config(), true); err != nil {
return model.NewAppError("DisablePlugin", "app.plugin.config.app_error", nil, err.Error(), http.StatusInternalServerError)
}
return nil
}
func (a *App) GetPlugins() (*model.PluginsResponse, *model.AppError) {
pluginsEnvironment := a.GetPluginsEnvironment()
if pluginsEnvironment == nil {
return nil, model.NewAppError("GetPlugins", "app.plugin.disabled.app_error", nil, "", http.StatusNotImplemented)
}
availablePlugins, err := pluginsEnvironment.Available()
if err != nil {
return nil, model.NewAppError("GetPlugins", "app.plugin.get_plugins.app_error", nil, err.Error(), http.StatusInternalServerError)
}
resp := &model.PluginsResponse{Active: []*model.PluginInfo{}, Inactive: []*model.PluginInfo{}}
for _, plugin := range availablePlugins {
if plugin.Manifest == nil {
continue
}
info := &model.PluginInfo{
Manifest: *plugin.Manifest,
}
if pluginsEnvironment.IsActive(plugin.Manifest.Id) {
resp.Active = append(resp.Active, info)
} else {
resp.Inactive = append(resp.Inactive, info)
}
}
return resp, nil
}
// GetMarketplacePlugin returns plugin from marketplace-server
func (a *App) GetMarketplacePlugin(request *model.InstallMarketplacePluginRequest) (*model.BaseMarketplacePlugin, *model.AppError) {
marketplaceClient, err := marketplace.NewClient(
*a.Config().PluginSettings.MarketplaceUrl,
a.HTTPService,
)
if err != nil {
return nil, model.NewAppError("GetMarketplacePlugin", "app.plugin.marketplace_client.app_error", nil, err.Error(), http.StatusInternalServerError)
}
filter := &model.MarketplacePluginFilter{Filter: request.Id, ServerVersion: model.CurrentVersion}
plugin, err := marketplaceClient.GetPlugin(filter, request.Version)
if err != nil {
return nil, model.NewAppError("GetMarketplacePlugin", "app.plugin.marketplace_plugins.not_found.app_error", nil, err.Error(), http.StatusInternalServerError)
}
return plugin, nil
}
// GetMarketplacePlugins returns a list of plugins from the marketplace-server,
// and plugins that are installed locally.
func (a *App) GetMarketplacePlugins(filter *model.MarketplacePluginFilter) ([]*model.MarketplacePlugin, *model.AppError) {
var result []*model.MarketplacePlugin
pluginSet := map[string]bool{}
pluginsEnvironment := a.GetPluginsEnvironment()
if pluginsEnvironment == nil {
return nil, model.NewAppError("GetMarketplacePlugins", "app.plugin.config.app_error", nil, "", http.StatusInternalServerError)
}
marketplaceClient, err := marketplace.NewClient(
*a.Config().PluginSettings.MarketplaceUrl,
a.HTTPService,
)
if err != nil {
return nil, model.NewAppError("GetMarketplacePlugins", "app.plugin.marketplace_client.app_error", nil, err.Error(), http.StatusInternalServerError)
}
// Fetch all plugins from marketplace.
marketplacePlugins, err := marketplaceClient.GetPlugins(&model.MarketplacePluginFilter{
PerPage: -1,
ServerVersion: model.CurrentVersion,
})
if err != nil {
return nil, model.NewAppError("GetMarketplacePlugins", "app.plugin.marketplace_plugins.app_error", nil, err.Error(), http.StatusInternalServerError)
}
for _, p := range marketplacePlugins {
if p.Manifest == nil || !pluginMatchesFilter(p.Manifest, filter.Filter) {
continue
}
marketplacePlugin := &model.MarketplacePlugin{
BaseMarketplacePlugin: p,
}
var manifest *model.Manifest
if manifest, err = pluginsEnvironment.GetManifest(p.Manifest.Id); err != nil && err != plugin.ErrNotFound {
return nil, model.NewAppError("GetMarketplacePlugins", "app.plugin.config.app_error", nil, err.Error(), http.StatusInternalServerError)
} else if err == nil {
// Plugin is installed.
marketplacePlugin.InstalledVersion = manifest.Version
}
pluginSet[p.Manifest.Id] = true
result = append(result, marketplacePlugin)
}
// Include all other installed plugins.
plugins, err := pluginsEnvironment.Available()
if err != nil {
return nil, model.NewAppError("GetMarketplacePlugins", "app.plugin.config.app_error", nil, err.Error(), http.StatusInternalServerError)
}
for _, plugin := range plugins {
if plugin.Manifest == nil || pluginSet[plugin.Manifest.Id] || !pluginMatchesFilter(plugin.Manifest, filter.Filter) {
continue
}
result = append(result, &model.MarketplacePlugin{
BaseMarketplacePlugin: &model.BaseMarketplacePlugin{
Manifest: plugin.Manifest,
},
InstalledVersion: plugin.Manifest.Version,
})
}
// Sort result alphabetically.
sort.SliceStable(result, func(i, j int) bool {
return strings.ToLower(result[i].Manifest.Name) < strings.ToLower(result[j].Manifest.Name)
})
return result, nil
}
func pluginMatchesFilter(manifest *model.Manifest, filter string) bool {
filter = strings.TrimSpace(strings.ToLower(filter))
if filter == "" {
return true
}
if strings.ToLower(manifest.Id) == filter {
return true
}
if strings.Contains(strings.ToLower(manifest.Name), filter) {
return true
}
if strings.Contains(strings.ToLower(manifest.Description), filter) {
return true
}
return false
}
// notifyPluginEnabled notifies connected websocket clients across all peers if the version of the given
// plugin is same across them.
//
// When a peer finds itself in agreement with all other peers as to the version of the given plugin,
// it will notify all connected websocket clients (across all peers) to trigger the (re-)installation.
// There is a small chance that this never occurs, because the last server to finish installing dies before it can announce.
// There is also a chance that multiple servers notify, but the webapp handles this idempotently.
func (a *App) notifyPluginEnabled(manifest *model.Manifest) error {
pluginsEnvironment := a.GetPluginsEnvironment()
if pluginsEnvironment == nil {
return errors.New("pluginsEnvironment is nil")
}
if !manifest.HasClient() || !pluginsEnvironment.IsActive(manifest.Id) {
return nil
}
var statuses model.PluginStatuses
if a.Cluster != nil {
var err *model.AppError
statuses, err = a.Cluster.GetPluginStatuses()
if err != nil {
return err
}
}
localStatus, err := a.GetPluginStatus(manifest.Id)
if err != nil {
return err
}
statuses = append(statuses, localStatus)
// This will not guard against the race condition of enabling a plugin immediately after installation.
// As GetPluginStatuses() will not return the new plugin (since other peers are racing to install),
// this peer will end up checking status against itself and will notify all webclients (including peer webclients),
// which may result in a 404.
for _, status := range statuses {
if status.PluginId == manifest.Id && status.Version != manifest.Version {
mlog.Debug("Not ready to notify webclients", mlog.String("cluster_id", status.ClusterId), mlog.String("plugin_id", manifest.Id))
return nil
}
}
// Notify all cluster peer clients.
message := model.NewWebSocketEvent(model.WEBSOCKET_EVENT_PLUGIN_ENABLED, "", "", "", nil)
message.Add("manifest", manifest.ClientManifest())
a.Publish(message)
return nil
}
func (a *App) getPluginsFromFolder() (map[string]*pluginSignaturePath, *model.AppError) {
fileStorePaths, appErr := a.ListDirectory(fileStorePluginFolder)
if appErr != nil {
return nil, model.NewAppError("getPluginsFromDir", "app.plugin.sync.list_filestore.app_error", nil, appErr.Error(), http.StatusInternalServerError)
}
pluginSignaturePathMap := make(map[string]*pluginSignaturePath)
for _, path := range fileStorePaths {
if strings.HasSuffix(path, ".tar.gz") {
id := strings.TrimSuffix(filepath.Base(path), ".tar.gz")
helper := &pluginSignaturePath{
pluginId: id,
path: path,
signaturePath: "",
}
pluginSignaturePathMap[id] = helper
}
}
for _, path := range fileStorePaths {
if strings.HasSuffix(path, ".tar.gz.sig") {
id := strings.TrimSuffix(filepath.Base(path), ".tar.gz.sig")
if val, ok := pluginSignaturePathMap[id]; !ok {
mlog.Error("Unknown signature", mlog.String("path", path))
} else {
val.signaturePath = path
}
}
}
return pluginSignaturePathMap, nil
}