Add ActivityPub components, routes, handlers

webfinger.go

@@ -0,0 +1,71 @@
+package writefreely
+
+import (
+	"github.com/writeas/go-webfinger"
+	"github.com/writeas/impart"
+	"github.com/writeas/web-core/log"
+	"github.com/writeas/writefreely/config"
+	"net/http"
+)
+
+type wfResolver struct {
+	db  *datastore
+	cfg *config.Config
+}
+
+var wfUserNotFoundErr = impart.HTTPError{http.StatusNotFound, "User not found."}
+
+func (wfr wfResolver) FindUser(username string, host, requestHost string, r []webfinger.Rel) (*webfinger.Resource, error) {
+	var c *Collection
+	var err error
+	if wfr.cfg.App.SingleUser {
+		c, err = wfr.db.GetCollectionByID(1)
+	} else {
+		c, err = wfr.db.GetCollection(username)
+	}
+	if err != nil {
+		log.Error("Unable to get blog: %v", err)
+		return nil, err
+	}
+	if wfr.cfg.App.SingleUser {
+		// Ensure handle matches user-chosen one on single-user blogs
+		if username != c.Alias {
+			log.Info("Username '%s' is not handle '%s'", username, c.Alias)
+			return nil, wfUserNotFoundErr
+		}
+	}
+	// Only return information if site has federation enabled.
+	// TODO: enable two levels of federation? Unlisted or Public on timelines?
+	if !wfr.cfg.App.Federation {
+		return nil, wfUserNotFoundErr
+	}
+
+	res := webfinger.Resource{
+		Subject: "acct:" + username + "@" + host,
+		Aliases: []string{
+			c.CanonicalURL(),
+			c.FederatedAccount(),
+		},
+		Links: []webfinger.Link{
+			{
+				HRef: c.CanonicalURL(),
+				Type: "text/html",
+				Rel:  "https://webfinger.net/rel/profile-page",
+			},
+			{
+				HRef: c.FederatedAccount(),
+				Type: "application/activity+json",
+				Rel:  "self",
+			},
+		},
+	}
+	return &res, nil
+}
+
+func (wfr wfResolver) DummyUser(username string, hostname string, r []webfinger.Rel) (*webfinger.Resource, error) {
+	return nil, wfUserNotFoundErr
+}
+
+func (wfr wfResolver) IsNotFoundError(err error) bool {
+	return err == wfUserNotFoundErr
+}