activityserve/http.go

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package activityserve
import (
"fmt"
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"io/ioutil"
"net/http"
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"strconv"
"strings"
"github.com/gologme/log"
"github.com/gorilla/mux"
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"github.com/writefreely/go-nodeinfo"
"encoding/json"
)
// ServeSingleActor just simplifies the call from main so
// that onboarding is as easy as possible
func ServeSingleActor(actor Actor) {
Serve(map[string]Actor{actor.Name: actor})
}
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// Serve starts an http server with all the required handlers
func Serve(actors map[string]Actor) {
var webfingerHandler http.HandlerFunc = func(w http.ResponseWriter, r *http.Request) {
w.Header().Set("content-type", "application/jrd+json; charset=utf-8")
account := r.URL.Query().Get("resource") // should be something like acct:user@example.com
account = strings.Replace(account, "acct:", "", 1) // remove acct:
server := strings.Split(baseURL, "://")[1] // remove protocol from baseURL. Should get example.com
server = strings.TrimSuffix(server, "/") // remove protocol from baseURL. Should get example.com
account = strings.Replace(account, "@"+server, "", 1) // remove server from handle. Should get user
actor, err := LoadActor(account)
// error out if this actor does not exist
if err != nil {
log.Info("No such actor")
w.WriteHeader(http.StatusNotFound)
fmt.Fprintf(w, "404 - actor not found")
return
}
// 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"}]}`
responseMap := make(map[string]interface{})
responseMap["subject"] = "acct:" + actor.Name + "@" + server
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// links is a json array with a single element
var links [1]map[string]string
link1 := make(map[string]string)
link1["rel"] = "self"
link1["type"] = "application/activity+json"
link1["href"] = baseURL + actor.Name
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links[0] = link1
responseMap["links"] = links
response, err := json.Marshal(responseMap)
if err != nil {
log.Error("problem creating the webfinger response json")
}
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PrettyPrintJSON(response)
w.Write([]byte(response))
}
var actorHandler http.HandlerFunc = func(w http.ResponseWriter, r *http.Request) {
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")
username := mux.Vars(r)["actor"]
log.Info(username)
if username == ".well-known" || username == "favicon.ico" {
log.Info("well-known, skipping...")
return
}
actor, err := LoadActor(username)
// error out if this actor does not exist (or there are dots or slashes in his name)
if err != nil {
w.WriteHeader(http.StatusNotFound)
fmt.Fprintf(w, "404 - page not found")
log.Info("Can't create local actor")
return
}
fmt.Fprintf(w, actor.whoAmI())
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// Show some debugging information
printer.Info("")
body, _ := ioutil.ReadAll(r.Body)
PrettyPrintJSON(body)
log.Info(FormatHeaders(r.Header))
printer.Info("")
}
var outboxHandler http.HandlerFunc = func(w http.ResponseWriter, r *http.Request) {
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
username := mux.Vars(r)["actor"] // get the needed actor from the muxer (url variable {actor} below)
actor, err := LoadActor(username) // load the actor from disk
if err != nil { // either actor requested has illegal characters or
log.Info("Can't load local actor") // we don't have such actor
fmt.Fprintf(w, "404 - page not found")
w.WriteHeader(http.StatusNotFound)
return
}
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postsPerPage := 100
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var response []byte
filename := storage + slash + "actors" + slash + actor.Name + slash + "outbox.txt"
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totalLines, err := lineCounter(filename)
if err != nil {
log.Info("Can't read outbox.txt")
log.Info(err)
return
}
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if pageStr == "" {
//TODO fix total items
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response = []byte(`{
"@context" : "https://www.w3.org/ns/activitystreams",
"first" : "` + baseURL + actor.Name + `/outbox?page=1",
"id" : "` + baseURL + actor.Name + `/outbox",
"last" : "` + baseURL + actor.Name + `/outbox?page=` + strconv.Itoa(totalLines/postsPerPage+1) + `",
"totalItems" : ` + strconv.Itoa(totalLines) + `,
"type" : "OrderedCollection"
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}`)
} else {
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page, err := strconv.Atoi(pageStr) // get page number from query string
if err != nil {
log.Info("Page number not a number, assuming 1")
page = 1
}
lines, err := ReadLines(filename, (page-1)*postsPerPage, page*(postsPerPage+1)-1)
if err != nil {
log.Info("Can't read outbox file")
log.Info(err)
return
}
responseMap := make(map[string]interface{})
responseMap["@context"] = context()
responseMap["id"] = baseURL + actor.Name + "/outbox?page=" + pageStr
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if page*postsPerPage < totalLines {
responseMap["next"] = baseURL + actor.Name + "/outbox?page=" + strconv.Itoa(page+1)
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}
if page > 1 {
responseMap["prev"] = baseURL + actor.Name + "/outbox?page=" + strconv.Itoa(page-1)
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}
responseMap["partOf"] = baseURL + actor.Name + "/outbox"
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responseMap["type"] = "OrderedCollectionPage"
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orderedItems := make([]interface{}, 0, postsPerPage)
for _, item := range lines {
// split the line
parts := strings.Split(item, "/")
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// keep the hash
hash := parts[len(parts)-1]
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// build the filename
filename := storage + slash + "actors" + slash + actor.Name + slash + "items" + slash + hash + ".json"
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// open the file
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activityJSON, err := ioutil.ReadFile(filename)
if err != nil {
log.Error("can't read activity")
log.Info(filename)
return
}
var temp map[string]interface{}
// put it into a map
json.Unmarshal(activityJSON, &temp)
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// append to orderedItems
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orderedItems = append(orderedItems, temp)
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}
responseMap["orderedItems"] = orderedItems
response, err = json.Marshal(responseMap)
if err != nil {
log.Info("can't marshal map to json")
log.Info(err)
return
}
}
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w.Write(response)
}
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var inboxHandler http.HandlerFunc = func(w http.ResponseWriter, r *http.Request) {
b, err := ioutil.ReadAll(r.Body)
if err != nil {
panic(err)
}
activity := make(map[string]interface{})
err = json.Unmarshal(b, &activity)
if err != nil {
log.Error("Probably this request didn't have (valid) JSON inside it")
return
}
// TODO check if it's actually an activity
// check if case is going to be an issue
switch activity["type"] {
case "Follow":
// load the object as actor
actor, err := LoadActor(mux.Vars(r)["actor"]) // load the actor from disk
if err != nil {
log.Error("No such actor")
return
}
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actor.OnFollow(activity)
case "Accept":
acceptor := activity["actor"].(string)
actor, err := LoadActor(mux.Vars(r)["actor"]) // load the actor from disk
if err != nil {
log.Error("No such actor")
return
}
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// From here down this could be moved to Actor (TBD)
follow := activity["object"].(map[string]interface{})
id := follow["id"].(string)
// check if the object of the follow is us
if follow["actor"].(string) != baseURL+actor.Name {
log.Info("This is not for us, ignoring")
return
}
// try to get the hash only
hash := strings.Replace(id, baseURL+actor.Name+"/item/", "", 1)
// if there are still slashes in the result this means the
// above didn't work
if strings.ContainsAny(hash, "/") {
// log.Info(follow)
log.Info("The id of this follow is probably wrong")
// we could return here but pixelfed returns
// the id as http://domain.tld/actor instead of
// http://domain.tld/actor/item/hash so this chokes
// return
}
// Have we already requested this follow or are we following anybody that
// sprays accepts?
// pixelfed doesn't return the original follow thus the id is wrong so we
// need to just check if we requested this actor
// pixelfed doesn't return the original follow thus the id is wrong so we
// need to just check if we requested this actor
if _, ok := actor.requested[acceptor]; !ok {
log.Info("We never requested this follow from " + acceptor +", ignoring the Accept")
return
}
// if pixelfed fixes https://github.com/pixelfed/pixelfed/issues/1710 we should uncomment
// hash is the _ from above
// if hash != id {
// log.Info("Id mismatch between Follow request and Accept")
// return
// }
actor.following[acceptor] = hash
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PrettyPrint(activity)
delete(actor.requested, acceptor)
actor.save()
case "Reject":
rejector := activity["actor"].(string)
actor, err := LoadActor(mux.Vars(r)["actor"]) // load the actor from disk
if err != nil {
log.Error("No such actor")
return
}
// write the actor to the list of rejected follows so that
// we won't try following them again
actor.rejected[rejector] = ""
actor.save()
case "Create":
actor, ok := actors[mux.Vars(r)["actor"]] // load the actor from memory
if !ok {
// log.Error(actors)
log.Error("No such actor: " + mux.Vars(r)["actor"])
return
}
log.Info("Received the following activity from: " + r.UserAgent())
PrettyPrintJSON(b)
actor.OnReceiveContent(activity)
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default:
}
}
var peersHandler http.HandlerFunc = func(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("content-type", "application/activity+json; charset=utf-8")
username := mux.Vars(r)["actor"]
collection := mux.Vars(r)["peers"]
if collection != "followers" && collection != "following" {
w.WriteHeader(http.StatusNotFound)
w.Write([]byte("404 - No such collection"))
return
}
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actor, err := LoadActor(username)
// error out if this actor does not exist
if err != nil {
log.Info("Can't create local actor")
return
}
var page int
pageS := r.URL.Query().Get("page")
if pageS == "" {
page = 0
} else {
page, _ = strconv.Atoi(pageS)
}
response, _ := actor.getPeers(page, collection)
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w.Write(response)
}
var postHandler http.HandlerFunc = func(w http.ResponseWriter, r *http.Request) {
w.Header().Set("content-type", "application/activity+json; charset=utf-8")
username := mux.Vars(r)["actor"]
hash := mux.Vars(r)["hash"]
actor, err := LoadActor(username)
// error out if this actor does not exist
if err != nil {
log.Info("Can't create local actor")
return
}
post, err := actor.loadItem(hash)
if err != nil {
w.WriteHeader(http.StatusNotFound)
fmt.Fprintf(w, "404 - post not found")
return
}
postJSON, err := json.Marshal(post)
if err != nil {
log.Info("failed to marshal json from item " + hash + " text")
return
}
w.Write(postJSON)
}
// Add the handlers to a HTTP server
gorilla := mux.NewRouter()
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niCfg := nodeInfoConfig(baseURL)
ni := nodeinfo.NewService(*niCfg, nodeInfoResolver{len(actors)})
gorilla.HandleFunc(nodeinfo.NodeInfoPath, http.HandlerFunc(ni.NodeInfoDiscover))
gorilla.HandleFunc(niCfg.InfoURL, http.HandlerFunc(ni.NodeInfo))
gorilla.HandleFunc("/.well-known/webfinger", webfingerHandler)
gorilla.HandleFunc("/{actor}/peers/{peers}", peersHandler)
gorilla.HandleFunc("/{actor}/outbox", outboxHandler)
gorilla.HandleFunc("/{actor}/outbox/", outboxHandler)
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gorilla.HandleFunc("/{actor}/inbox", inboxHandler)
gorilla.HandleFunc("/{actor}/inbox/", inboxHandler)
gorilla.HandleFunc("/{actor}/", actorHandler)
gorilla.HandleFunc("/{actor}", actorHandler)
gorilla.HandleFunc("/{actor}/item/{hash}", postHandler)
http.Handle("/", gorilla)
log.Fatal(http.ListenAndServe(":8081", nil))
}