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package webfinger
import (
"encoding/json"
"io/ioutil"
"net/http"
"regexp"
"strings"
"github.com/FChannel0/FChannel-Server/activitypub"
"github.com/FChannel0/FChannel-Server/config"
"github.com/FChannel0/FChannel-Server/util"
)
type Webfinger struct {
Subject string `json:"subject,omitempty"`
Links []WebfingerLink `json:"links,omitempty"`
}
type WebfingerLink struct {
Rel string `json:"rel,omitempty"`
Type string `json:"type,omitempty"`
Href string `json:"href,omitempty"`
}
var ActorCache = make(map[string]activitypub.Actor)
func GetActor(id string) (activitypub.Actor, error) {
var respActor activitypub.Actor
if id == "" {
return respActor, nil
}
actor, instance := activitypub.GetActorInstance(id)
if ActorCache[actor+"@"+instance].Id != "" {
respActor = ActorCache[actor+"@"+instance]
return respActor, nil
}
req, err := http.NewRequest("GET", strings.TrimSpace(id), nil)
if err != nil {
return respActor, err
}
req.Header.Set("Accept", config.ActivityStreams)
resp, err := util.RouteProxy(req)
if err != nil {
return respActor, err
}
defer resp.Body.Close()
body, _ := ioutil.ReadAll(resp.Body)
if err := json.Unmarshal(body, &respActor); err != nil {
return respActor, err
}
ActorCache[actor+"@"+instance] = respActor
return respActor, nil
}
//looks for actor with pattern of board@instance
func FingerActor(path string) (activitypub.Actor, error) {
var nActor activitypub.Actor
actor, instance := activitypub.GetActorInstance(path)
if actor == "" && instance == "" {
return nActor, nil
}
if ActorCache[actor+"@"+instance].Id != "" {
nActor = ActorCache[actor+"@"+instance]
} else {
r, _ := FingerRequest(actor, instance)
if r != nil && r.StatusCode == 200 {
defer r.Body.Close()
body, _ := ioutil.ReadAll(r.Body)
json.Unmarshal(body, &nActor)
// if err := json.Unmarshal(body, &nActor); err != nil {
// return nActor, err
// }
ActorCache[actor+"@"+instance] = nActor
}
}
return nActor, nil
}
func FingerRequest(actor string, instance string) (*http.Response, error) {
acct := "acct:" + actor + "@" + instance
// TODO: respect https
req, _ := http.NewRequest("GET", "http://"+instance+"/.well-known/webfinger?resource="+acct, nil)
// if err != nil {
// return nil, err
// }
resp, err := util.RouteProxy(req)
if err != nil {
return resp, nil
}
var finger Webfinger
if resp.StatusCode == 200 {
defer resp.Body.Close()
body, _ := ioutil.ReadAll(resp.Body)
json.Unmarshal(body, &finger)
// if err := json.Unmarshal(body, &finger); err != nil {
// return resp, err
// }
}
if len(finger.Links) > 0 {
for _, e := range finger.Links {
if e.Type == "application/activity+json" {
req, _ := http.NewRequest("GET", e.Href, nil)
// if err != nil {
// return resp, err
// }
req.Header.Set("Accept", config.ActivityStreams)
resp, _ := util.RouteProxy(req)
return resp, nil
}
}
}
return resp, nil
}
func CheckValidActivity(id string) (activitypub.Collection, bool, error) {
var respCollection activitypub.Collection
re := regexp.MustCompile(`.+\.onion(.+)?`)
if re.MatchString(id) {
id = strings.Replace(id, "https", "http", 1)
}
req, err := http.NewRequest("GET", id, nil)
if err != nil {
return respCollection, false, err
}
req.Header.Set("Accept", config.ActivityStreams)
resp, err := util.RouteProxy(req)
if err != nil {
return respCollection, false, err
}
defer resp.Body.Close()
body, _ := ioutil.ReadAll(resp.Body)
if err := json.Unmarshal(body, &respCollection); err != nil {
return respCollection, false, err
}
if respCollection.AtContext.Context == "https://www.w3.org/ns/activitystreams" && respCollection.OrderedItems[0].Id != "" {
return respCollection, true, nil
}
return respCollection, false, nil
}
func CreateActivity(activityType string, obj activitypub.ObjectBase) (activitypub.Activity, error) {
var newActivity activitypub.Activity
actor, err := FingerActor(obj.Actor)
if err != nil {
return newActivity, err
}
newActivity.AtContext.Context = "https://www.w3.org/ns/activitystreams"
newActivity.Type = activityType
newActivity.Published = obj.Published
newActivity.Actor = &actor
newActivity.Object = &obj
for _, e := range obj.To {
if obj.Actor != e {
newActivity.To = append(newActivity.To, e)
}
}
for _, e := range obj.Cc {
if obj.Actor != e {
newActivity.Cc = append(newActivity.Cc, e)
}
}
return newActivity, nil
}
func AddFollowersToActivity(activity activitypub.Activity) (activitypub.Activity, error) {
activity.To = append(activity.To, activity.Actor.Id)
for _, e := range activity.To {
aFollowers, err := GetActorCollection(e + "/followers")
if err != nil {
return activity, err
}
for _, k := range aFollowers.Items {
activity.To = append(activity.To, k.Id)
}
}
var nActivity activitypub.Activity
for _, e := range activity.To {
var alreadyTo = false
for _, k := range nActivity.To {
if e == k || e == activity.Actor.Id {
alreadyTo = true
}
}
if !alreadyTo {
nActivity.To = append(nActivity.To, e)
}
}
activity.To = nActivity.To
return activity, nil
}
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