/
handle.go
314 lines (290 loc) · 8.66 KB
/
handle.go
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package api
import (
"encoding/json"
"errors"
uuid "github.com/satori/go.uuid"
"net/http"
"net/url"
"github.com/sirupsen/logrus"
"github.com/yukimochi/Activity-Relay/models"
"github.com/yukimochi/machinery-v1/v1/tasks"
)
func handleWebfinger(writer http.ResponseWriter, request *http.Request) {
queriedResource := request.URL.Query()["resource"]
if request.Method != "GET" || len(queriedResource) == 0 {
writer.WriteHeader(400)
writer.Write(nil)
} else {
queriedSubject := queriedResource[0]
if queriedSubject == Webfinger.Subject {
webfinger, err := json.Marshal(&Webfinger)
if err != nil {
panic(err)
}
writer.Header().Add("Content-Type", "application/json")
writer.WriteHeader(200)
writer.Write(webfinger)
} else {
writer.WriteHeader(404)
writer.Write(nil)
}
}
}
func handleNodeinfoLink(writer http.ResponseWriter, request *http.Request) {
if request.Method != "GET" {
writer.WriteHeader(400)
writer.Write(nil)
} else {
nodeinfoLinks, err := json.Marshal(&Nodeinfo.NodeinfoLinks)
if err != nil {
panic(err)
}
writer.Header().Add("Content-Type", "application/json")
writer.WriteHeader(200)
writer.Write(nodeinfoLinks)
}
}
func handleNodeinfo(writer http.ResponseWriter, request *http.Request) {
if request.Method != "GET" {
writer.WriteHeader(400)
writer.Write(nil)
} else {
userTotal := len(RelayState.Subscriptions)
Nodeinfo.Nodeinfo.Usage.Users.Total = userTotal
Nodeinfo.Nodeinfo.Usage.Users.ActiveMonth = userTotal
Nodeinfo.Nodeinfo.Usage.Users.ActiveHalfyear = userTotal
nodeinfo, err := json.Marshal(&Nodeinfo.Nodeinfo)
if err != nil {
panic(err)
}
writer.Header().Add("Content-Type", "application/json")
writer.WriteHeader(200)
writer.Write(nodeinfo)
}
}
func handleActor(writer http.ResponseWriter, request *http.Request) {
if request.Method == "GET" {
relayActor, err := json.Marshal(&RelayActor)
if err != nil {
panic(err)
}
writer.Header().Add("Content-Type", "application/activity+json")
writer.WriteHeader(200)
writer.Write(relayActor)
} else {
writer.WriteHeader(400)
writer.Write(nil)
}
}
func contains(entries interface{}, key string) bool {
switch entry := entries.(type) {
case string:
return entry == key
case []string:
for i := 0; i < len(entry); i++ {
if entry[i] == key {
return true
}
}
return false
case []models.Subscription:
for i := 0; i < len(entry); i++ {
if entry[i].Domain == key {
return true
}
}
return false
}
return false
}
func enqueueRelayActivity(fromDomain string, body []byte) {
activityID := uuid.NewV4()
remainCount := len(RelayState.Subscriptions) - 1
if remainCount < 1 {
return
}
pushActivityScript := "redis.call('HSET',KEYS[1], 'body', ARGV[1], 'remain_count', ARGV[2]); redis.call('EXPIRE', KEYS[1], ARGV[3]);"
RelayState.RedisClient.Eval(pushActivityScript, []string{"relay:activity:" + activityID.String()}, body, remainCount, 2*60).Result()
for _, subscription := range RelayState.Subscriptions {
if fromDomain == subscription.Domain {
continue
}
job := &tasks.Signature{
Name: "relay-v2",
RetryCount: 0,
Args: []tasks.Arg{
{
Name: "inboxURL",
Type: "string",
Value: subscription.InboxURL,
},
{
Name: "activityID",
Type: "string",
Value: activityID,
},
},
}
_, err := MachineryServer.SendTask(job)
if err != nil {
logrus.Error(err)
}
}
}
func enqueueRegisterActivity(inboxURL string, body []byte) {
job := &tasks.Signature{
Name: "register",
RetryCount: 2,
Args: []tasks.Arg{
{
Name: "inboxURL",
Type: "string",
Value: inboxURL,
},
{
Name: "body",
Type: "string",
Value: string(body),
},
},
}
_, err := MachineryServer.SendTask(job)
if err != nil {
logrus.Error(err)
}
}
func isFollowAcceptable(activity *models.Activity, _ *models.Actor) error {
if contains(activity.Object, "https://www.w3.org/ns/activitystreams#Public") {
domain, _ := url.Parse(activity.Actor)
if contains(RelayState.BlockedDomains, domain.Host) {
return errors.New("this domain is blacklisted")
}
return nil
} else {
return errors.New("only https://www.w3.org/ns/activitystreams#Public is allowed to follow")
}
}
func isUnFollowAcceptable(activity *models.Activity, _ *models.Actor) error {
if contains(activity.Object, "https://www.w3.org/ns/activitystreams#Public") {
return nil
} else {
return errors.New("only https://www.w3.org/ns/activitystreams#Public is allowed to unfollow")
}
}
func isRelayAcceptable(activity *models.Activity, _ *models.Actor) error {
if !contains(activity.To, "https://www.w3.org/ns/activitystreams#Public") && !contains(activity.Cc, "https://www.w3.org/ns/activitystreams#Public") {
return errors.New("recipient must include https://www.w3.org/ns/activitystreams#Public")
}
domain, _ := url.Parse(activity.Actor)
if contains(RelayState.Subscriptions, domain.Host) {
return nil
}
return errors.New("to use the relay service, please follow in advance")
}
func isRelayRetransmission(activity *models.Activity, actor *models.Actor) bool {
domain, _ := url.Parse(activity.Actor)
if contains(RelayState.LimitedDomains, domain.Host) {
return false
}
if RelayState.RelayConfig.BlockService && actor.Type != "Person" {
return false
}
return true
}
func handleInbox(writer http.ResponseWriter, request *http.Request, activityDecoder func(*http.Request) (*models.Activity, *models.Actor, []byte, error)) {
switch request.Method {
case "POST":
activity, actor, body, err := activityDecoder(request)
if err != nil {
writer.WriteHeader(400)
writer.Write(nil)
} else {
domain, _ := url.Parse(activity.Actor)
switch activity.Type {
case "Follow":
err = isFollowAcceptable(activity, actor)
if err != nil {
resp := activity.GenerateResponse(GlobalConfig.ServerHostname(), "Reject")
jsonData, _ := json.Marshal(&resp)
go enqueueRegisterActivity(actor.Inbox, jsonData)
logrus.Error("Rejected Follow Request : ", activity.Actor, err.Error())
} else {
if RelayState.RelayConfig.ManuallyAccept {
RelayState.RedisClient.HMSet("relay:pending:"+domain.Host, map[string]interface{}{
"inbox_url": actor.Endpoints.SharedInbox,
"activity_id": activity.ID,
"type": "Follow",
"actor": actor.ID,
"object": activity.Object.(string),
})
logrus.Info("Pending Follow Request : ", activity.Actor)
} else {
resp := activity.GenerateResponse(GlobalConfig.ServerHostname(), "Accept")
jsonData, _ := json.Marshal(&resp)
go enqueueRegisterActivity(actor.Inbox, jsonData)
RelayState.AddSubscription(models.Subscription{
Domain: domain.Host,
InboxURL: actor.Endpoints.SharedInbox,
ActivityID: activity.ID,
ActorID: actor.ID,
})
logrus.Info("Accepted Follow Request : ", activity.Actor)
}
}
writer.WriteHeader(202)
writer.Write(nil)
case "Undo":
innerActivity, _ := activity.InnerActivity()
if innerActivity.Type == "Follow" && innerActivity.Actor == activity.Actor {
err = isUnFollowAcceptable(innerActivity, actor)
if err != nil {
logrus.Error("Rejected Unfollow Request : ", activity.Actor, err.Error())
writer.WriteHeader(400)
writer.Write([]byte(err.Error()))
} else {
RelayState.DelSubscription(domain.Host)
logrus.Info("Accepted Unfollow Request : ", activity.Actor)
writer.WriteHeader(202)
writer.Write(nil)
}
break
}
fallthrough
case "Create", "Update", "Delete", "Move":
err = isRelayAcceptable(activity, actor)
if err != nil {
writer.WriteHeader(400)
writer.Write([]byte(err.Error()))
return
}
if isRelayRetransmission(activity, actor) {
if RelayState.RelayConfig.CreateAsAnnounce && activity.Type == "Create" {
nestedObject, err := activity.InnerActivity()
if err != nil {
logrus.Error("Failed to decode inner activity : ", err.Error())
}
switch nestedObject.Type {
case "Note":
resp := nestedObject.GenerateAnnounce(GlobalConfig.ServerHostname())
jsonData, _ := json.Marshal(&resp)
go enqueueRelayActivity(domain.Host, jsonData)
logrus.Debug("Accepted Announce Note : ", activity.Actor)
default:
logrus.Debug("Skipped Announce ", nestedObject.Type, " : ", activity.Actor)
}
} else {
go enqueueRelayActivity(domain.Host, body)
logrus.Debug("Accepted Relay Activity : ", activity.Actor)
}
} else {
logrus.Debug("Skipped Relay Activity : ", activity.Actor)
}
writer.WriteHeader(202)
writer.Write(nil)
}
}
default:
writer.WriteHeader(404)
writer.Write(nil)
}
}