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package activitypub
import (
"encoding/json"
"io/ioutil"
"net/http"
"strings"
"time"
"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"`
}
func GetActor(id string) (Actor, error) {
var respActor Actor
if id == "" {
return respActor, nil
}
actor, instance := GetActorAndInstance(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, util.MakeError(err, "GetActor")
}
req.Header.Set("Accept", config.ActivityStreams)
resp, err := util.RouteProxy(req)
if err != nil {
return respActor, util.MakeError(err, "GetActor")
}
defer resp.Body.Close()
body, _ := ioutil.ReadAll(resp.Body)
if err := json.Unmarshal(body, &respActor); err != nil {
return respActor, util.MakeError(err, "GetActor")
}
ActorCache[actor+"@"+instance] = respActor
return respActor, nil
}
//looks for actor with pattern of board@instance
func FingerActor(path string) (Actor, error) {
var nActor Actor
actor, instance := GetActorAndInstance(path)
if actor == "" && instance == "" {
return nActor, nil
}
if ActorCache[actor+"@"+instance].Id != "" {
nActor = ActorCache[actor+"@"+instance]
} else {
resp, err := FingerRequest(actor, instance)
if err != nil {
return nActor, util.MakeError(err, "FingerActor finger request")
}
if resp != nil && resp.StatusCode == 200 {
defer resp.Body.Close()
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
return nActor, util.MakeError(err, "FingerActor read resp")
}
if err := json.Unmarshal(body, &nActor); err != nil {
return nActor, util.MakeError(err, "FingerActor unmarshal")
}
ActorCache[actor+"@"+instance] = nActor
}
}
return nActor, nil
}
func FingerRequest(actor string, instance string) (*http.Response, error) {
acct := "acct:" + actor + "@" + instance
// TODO: respect https
req, err := http.NewRequest("GET", "http://"+instance+"/.well-known/webfinger?resource="+acct, nil)
if err != nil {
return nil, util.MakeError(err, "FingerRequest")
}
resp, err := util.RouteProxy(req)
if err != nil {
return resp, err
}
var finger Webfinger
if resp.StatusCode == 200 {
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
return resp, err
}
if err := json.Unmarshal(body, &finger); err != nil {
return resp, util.MakeError(err, "FingerRequest")
}
}
if len(finger.Links) > 0 {
for _, e := range finger.Links {
if e.Type == "application/activity+json" {
req, err = http.NewRequest("GET", e.Href, nil)
if err != nil {
return resp, util.MakeError(err, "FingerRequest")
}
break
}
}
}
req.Header.Set("Accept", config.ActivityStreams)
if resp, err = util.RouteProxy(req); err != nil {
return resp, util.MakeError(err, "FingerRequest")
}
return resp, nil
}
func AddInstanceToIndexDB(actor string) error {
// TODO: completely disabling this until it is actually reasonable to turn it on
// only actually allow this when it more or less works, i.e. can post, make threads, manage boards, etc
return nil
//sleep to be sure the webserver is fully initialized
//before making finger request
time.Sleep(15 * time.Second)
nActor, err := FingerActor(actor)
if err != nil {
return util.MakeError(err, "IsValidActor")
}
if nActor.Id == "" {
return nil
}
// TODO: maybe allow different indexes?
reqActivity := Activity{Id: "https://fchan.xyz/followers"}
followers, err := reqActivity.GetCollection()
if err != nil {
return util.MakeError(err, "IsValidActor")
}
var alreadyIndex = false
for _, e := range followers.Items {
if e.Id == nActor.Id {
alreadyIndex = true
}
}
if !alreadyIndex {
actor := Actor{Id: "https://fchan.xyz"}
return actor.AddFollower(nActor.Id)
}
return nil
}
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