Add group_id, rate_limit and protocol AS config options (#478)
* Add group_id, rate_limit and protocol AS config options * We currently just record and error check these options. There are not currently implemented. Signed-off-by: Andrew Morgan <andrewm@matrix.org> * Clean things up and fix yaml declaration * Warn loudly when app service requests unimplemented options * Fix comments * Remove high cyclomatic complexity of appservice checkErrors * Set default rate limited to true
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@ -182,6 +182,12 @@ func (s *OutputRoomEventConsumer) filterRoomserverEvents(ctx context.Context, ev
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// appserviceIsInterestedInEvent returns a boolean depending on whether a given
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// event falls within one of a given application service's namespaces.
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func (s *OutputRoomEventConsumer) appserviceIsInterestedInEvent(ctx context.Context, event gomatrixserverlib.Event, appservice config.ApplicationService) bool {
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// No reason to queue events if they'll never be sent to the application
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// service
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if appservice.URL == "" {
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return false
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}
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// Check sender of the event
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for _, userNamespace := range appservice.NamespaceMap["users"] {
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if userNamespace.RegexpObject.MatchString(event.Sender()) {
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@ -21,6 +21,7 @@ import (
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"regexp"
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"strings"
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log "github.com/sirupsen/logrus"
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yaml "gopkg.in/yaml.v2"
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)
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@ -31,6 +32,14 @@ type ApplicationServiceNamespace struct {
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Exclusive bool `yaml:"exclusive"`
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// A regex pattern that represents the namespace
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Regex string `yaml:"regex"`
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// The ID of an existing group that all users of this application service will
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// be added to. This field is only relevant to the `users` namespace.
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// Note that users who are joined to this group through an application service
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// are not to be listed when querying for the group's members, however the
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// group should be listed when querying an application service user's groups.
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// This is to prevent making spamming all users of an application service
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// trivial.
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GroupID string `yaml:"group_id"`
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// Regex object representing our pattern. Saves having to recompile every time
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RegexpObject *regexp.Regexp
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}
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@ -51,14 +60,20 @@ type ApplicationService struct {
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// Information about an application service's namespaces. Key is either
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// "users", "aliases" or "rooms"
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NamespaceMap map[string][]ApplicationServiceNamespace `yaml:"namespaces"`
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// Whether rate limiting is applied to each application service user
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RateLimited bool `yaml:"rate_limited"`
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// Any custom protocols that this application service provides (e.g. IRC)
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Protocols []string `yaml:"protocols"`
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}
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// loadAppservices iterates through all application service config files
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// and loads their data into the config object for later access.
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func loadAppservices(config *Dendrite) error {
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for _, configPath := range config.ApplicationServices.ConfigFiles {
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// Create a new application service
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var appservice ApplicationService
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// Create a new application service with default options
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appservice := ApplicationService{
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RateLimited: true,
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}
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// Create an absolute path from a potentially relative path
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absPath, err := filepath.Abs(configPath)
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@ -161,8 +176,20 @@ func checkErrors(config *Dendrite) (err error) {
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var idMap = make(map[string]bool)
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var tokenMap = make(map[string]bool)
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// Compile regexp object for checking groupIDs
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groupIDRegexp := regexp.MustCompile(`\+.*:.*`)
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// Check each application service for any config errors
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for _, appservice := range config.Derived.ApplicationServices {
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// Namespace-related checks
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for key, namespaceSlice := range appservice.NamespaceMap {
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for _, namespace := range namespaceSlice {
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if err := validateNamespace(&appservice, key, &namespace, groupIDRegexp); err != nil {
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return err
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}
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}
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}
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// Check if we've already seen this ID. No two application services
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// can have the same ID or token.
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if idMap[appservice.ID] {
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@ -193,22 +220,51 @@ func checkErrors(config *Dendrite) (err error) {
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)})
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}
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}
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// TODO: Remove once rate_limited is implemented
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if appservice.RateLimited {
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log.Warn("WARNING: Application service option rate_limited is currently unimplemented")
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}
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// TODO: Remove once protocols is implemented
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if len(appservice.Protocols) > 0 {
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log.Warn("WARNING: Application service option protocols is currently unimplemented")
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}
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}
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return setupRegexps(config)
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}
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// validateNamespace returns nil or an error based on whether a given
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// application service namespace is valid. A namespace is valid if it has the
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// required fields, and its regex is correct.
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func validateNamespace(
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appservice *ApplicationService,
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key string,
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namespace *ApplicationServiceNamespace,
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groupIDRegexp *regexp.Regexp,
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) error {
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// Check that namespace(s) are valid regex
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for _, appservice := range config.Derived.ApplicationServices {
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for _, namespaceSlice := range appservice.NamespaceMap {
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for _, namespace := range namespaceSlice {
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if !IsValidRegex(namespace.Regex) {
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return configErrors([]string{fmt.Sprintf(
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"Invalid regex string for Application Service %s", appservice.ID,
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)})
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}
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}
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// Check if GroupID for the users namespace is in the correct format
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if key == "users" && namespace.GroupID != "" {
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// TODO: Remove once group_id is implemented
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log.Warn("WARNING: Application service option group_id is currently unimplemented")
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correctFormat := groupIDRegexp.MatchString(namespace.GroupID)
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if !correctFormat {
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return configErrors([]string{fmt.Sprintf(
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"Invalid user group_id field for application service %s.",
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appservice.ID,
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)})
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}
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}
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return setupRegexps(config)
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return nil
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}
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// IsValidRegex returns true or false based on whether the
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