300 lines
9.6 KiB
Go
300 lines
9.6 KiB
Go
package activityserve
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import (
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"fmt"
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"io/ioutil"
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"net/http"
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"strconv"
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"strings"
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"github.com/gologme/log"
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"github.com/gorilla/mux"
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"encoding/json"
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)
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// Serve starts an http server with all the required handlers
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func Serve() {
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var webfingerHandler http.HandlerFunc = func(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("content-type", "application/jrd+json; charset=utf-8")
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account := r.URL.Query().Get("resource") // should be something like acct:user@example.com
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account = strings.Replace(account, "acct:", "", 1) // remove acct:
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server := strings.Split(baseURL, "://")[1] // remove protocol from baseURL. Should get example.com
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server = strings.TrimSuffix(server, "/") // remove protocol from baseURL. Should get example.com
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account = strings.Replace(account, "@"+server, "", 1) // remove server from handle. Should get user
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actor, err := LoadActor(account)
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// error out if this actor does not exist
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if err != nil {
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log.Info("No such actor")
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w.WriteHeader(http.StatusNotFound)
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fmt.Fprintf(w, "404 - actor not found")
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return
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}
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// response := `{"subject":"acct:` + actor.name + `@` + server + `","aliases":["` + baseURL + actor.name + `","` + baseURL + actor.name + `"],"links":[{"href":"` + baseURL + `","type":"text/html","rel":"https://webfinger.net/rel/profile-page"},{"href":"` + baseURL + actor.name + `","type":"application/activity+json","rel":"self"}]}`
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responseMap := make(map[string]interface{})
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responseMap["subject"] = "acct:" + actor.name + "@" + server
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// links is a json array with a single element
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var links [1]map[string]string
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link1 := make(map[string]string)
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link1["rel"] = "self"
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link1["type"] = "application/activity+json"
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link1["href"] = baseURL + actor.name
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links[0] = link1
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responseMap["links"] = links
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response, err := json.Marshal(responseMap)
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if err != nil {
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log.Error("problem creating the webfinger response json")
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}
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PrettyPrintJSON(response)
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w.Write([]byte(response))
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}
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var actorHandler http.HandlerFunc = func(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("content-type", "application/activity+json; charset=utf-8")
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log.Info("Remote server " + r.RemoteAddr + " just fetched our /actor endpoint")
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username := mux.Vars(r)["actor"]
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log.Info(username)
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if username == ".well-known" || username == "favicon.ico" {
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log.Info("well-known, skipping...")
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return
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}
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actor, err := LoadActor(username)
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// error out if this actor does not exist (or there are dots or slashes in his name)
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if err != nil {
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w.WriteHeader(http.StatusNotFound)
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fmt.Fprintf(w, "404 - page not found")
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log.Info("Can't create local actor")
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return
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}
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fmt.Fprintf(w, actor.whoAmI())
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// Show some debugging information
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printer.Info("")
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body, _ := ioutil.ReadAll(r.Body)
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PrettyPrintJSON(body)
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log.Info(FormatHeaders(r.Header))
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printer.Info("")
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}
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var outboxHandler http.HandlerFunc = func(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("content-type", "application/activity+json; charset=utf-8")
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pageStr := r.URL.Query().Get("page") // get the page from the query string as string
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username := mux.Vars(r)["actor"] // get the needed actor from the muxer (url variable {actor} below)
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actor, err := LoadActor(username) // load the actor from disk
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if err != nil { // either actor requested has illegal characters or
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log.Info("Can't load local actor") // we don't have such actor
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fmt.Fprintf(w, "404 - page not found")
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w.WriteHeader(http.StatusNotFound)
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return
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}
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var response []byte
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if pageStr == "" {
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//TODO fix total items
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response = []byte(`{
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"@context" : "https://www.w3.org/ns/activitystreams",
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"first" : "` + baseURL + actor.name + `/outbox?page=true",
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"id" : "` + baseURL + actor.name + `/outbox",
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"last" : "` + baseURL + actor.name + `/outbox?min_id=0&page=1",
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"totalItems" : 10,
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"type" : "OrderedCollection"
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}`)
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} else {
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page, err := strconv.Atoi(pageStr) // get page number from query string
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if err != nil {
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log.Info("Page number not a number, assuming 1")
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page = 1
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}
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postsPerPage := 100
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filename := storage + slash + "actors" + slash + actor.name + slash + "outbox.txt"
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lines, err := ReadLines(filename, (page-1)*postsPerPage, page*(postsPerPage+1)-1)
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if err != nil {
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log.Info("Can't read outbox file")
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log.Info(err)
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return
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}
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responseMap := make(map[string]interface{})
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responseMap["@context"] = context()
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responseMap["id"] = baseURL + actor.name + "/outbox?page=" + pageStr
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totalLines, err := lineCounter(filename)
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if err != nil {
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log.Info("The file was deleted? It was okay a few lines above. Wtf?")
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log.Info(err)
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return
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}
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if page*postsPerPage < totalLines {
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responseMap["next"] = baseURL + actor.name + "/outbox?page=" + strconv.Itoa(page+1)
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}
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if page > 1 {
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responseMap["prev"] = baseURL + actor.name + "/outbox?page=" + strconv.Itoa(page-1)
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}
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responseMap["partOf"] = baseURL + actor.name + "/outbox"
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responseMap["type"] = "OrderedCollectionPage"
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orderedItems := make(map[string]interface{})
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for item := range lines {
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// read the line
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// parse the hash
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// build the filename
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// open the file
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// unmarshal
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// append to orderedItems
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}
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responseMap["orderedItems"] = orderedItems
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response, err = json.Marshal(responseMap)
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if err != nil {
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log.Info("can't marshal map to json")
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log.Info(err)
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return
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}
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}
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w.Write(response)
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}
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var inboxHandler http.HandlerFunc = func(w http.ResponseWriter, r *http.Request) {
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b, err := ioutil.ReadAll(r.Body)
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if err != nil {
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panic(err)
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}
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activity := make(map[string]interface{})
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err = json.Unmarshal(b, &activity)
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if err != nil {
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log.Error("Probably this request didn't have (valid) JSON inside it")
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return
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}
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// TODO check if it's actually an activity
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// check if case is going to be an issue
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switch activity["type"] {
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case "Follow":
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// it's a follow, write it down
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newFollower := activity["actor"].(string)
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// check we aren't following ourselves
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if newFollower == activity["object"] {
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log.Info("You can't follow yourself")
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return
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}
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// load the object as actor
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actor, err := LoadActor(mux.Vars(r)["actor"]) // load the actor from disk
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if err != nil {
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log.Error("No such actor")
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return
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}
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follower, err := NewRemoteActor(activity["actor"].(string))
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// check if this user is already following us
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if _, ok := actor.followers[newFollower]; ok {
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log.Info("You're already following us, yay!")
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// do nothing, they're already following us
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} else {
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actor.NewFollower(newFollower, follower.inbox)
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}
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// send accept anyway even if they are following us already
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// this is very verbose. I would prefer creating a map by hand
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// remove @context from the inner activity
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delete(activity, "@context")
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accept := make(map[string]interface{})
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accept["@context"] = "https://www.w3.org/ns/activitystreams"
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accept["to"] = activity["actor"]
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accept["id"] = actor.newIDurl()
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accept["actor"] = actor.iri
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accept["object"] = activity
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accept["type"] = "Accept"
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if err != nil {
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log.Info("Couldn't retrieve remote actor info, maybe server is down?")
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log.Info(err)
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}
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go actor.signedHTTPPost(accept, follower.inbox)
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case "Accept":
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acceptor := activity["actor"].(string)
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actor, err := LoadActor(mux.Vars(r)["actor"]) // load the actor from disk
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if err != nil {
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log.Error("No such actor")
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return
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}
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follow := activity["object"].(map[string]interface{})
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id := follow["id"].(string)
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// check if the object of the follow is us
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if follow["actor"].(string) != baseURL+actor.name {
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log.Info("This is not for us, ignoring")
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return
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}
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// try to get the hash only
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hash := strings.Replace(id, baseURL+actor.name+"/", "", 1)
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// if there are still slashes in the result this means the
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// above didn't work
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if strings.ContainsAny(hash, "/") {
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log.Info("The id of this follow is probably wrong")
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return
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}
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// Have we already requested this follow or are we following anybody that
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// sprays accepts?
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savedFollowRequest, err := actor.loadItem(hash)
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if err != nil {
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log.Info("We never requested this follow, ignoring the Accept")
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return
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}
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if savedFollowRequest["id"] != id {
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log.Info("Id mismatch between Follow request and Accept")
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return
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}
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actor.following[acceptor] = hash
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actor.save()
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default:
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}
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}
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var followersHandler http.HandlerFunc = func(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("content-type", "application/activity+json; charset=utf-8")
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username := mux.Vars(r)["actor"]
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actor, err := LoadActor(username)
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// error out if this actor does not exist
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if err != nil {
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log.Info("Can't create local actor")
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return
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}
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var page int
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pageS := r.URL.Query().Get("page")
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if pageS == "" {
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page = 0
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} else {
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page, _ = strconv.Atoi(pageS)
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}
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response, _ := actor.GetFollowers(page)
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w.Write(response)
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}
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// Add the handlers to a HTTP server
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gorilla := mux.NewRouter()
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gorilla.HandleFunc("/.well-known/webfinger", webfingerHandler)
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gorilla.HandleFunc("/{actor}/followers", followersHandler)
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gorilla.HandleFunc("/{actor}/outbox", outboxHandler)
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gorilla.HandleFunc("/{actor}/outbox/", outboxHandler)
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gorilla.HandleFunc("/{actor}/inbox", inboxHandler)
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gorilla.HandleFunc("/{actor}/inbox/", inboxHandler)
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gorilla.HandleFunc("/{actor}/", actorHandler)
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gorilla.HandleFunc("/{actor}", actorHandler)
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// gorilla.HandleFunc("/{actor}/post/{hash}", postHandler)
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http.Handle("/", gorilla)
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log.Fatal(http.ListenAndServe(":8081", nil))
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}
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