Inbox post (#22)

    Inbox POST from federated servers now working for statuses and follow requests.
    Follow request client API added.
    Start work on federating outgoing messages.
    Other fixes and changes/tidying up.

2 files changed, 61 insertions, 0 deletions

diff --git a/internal/api/s2s/user/inboxpost.go b/internal/api/s2s/user/inboxpost.go
new file mode 100644
index 000000000..60b74ab70
--- /dev/null
+++ b/internal/api/s2s/user/inboxpost.go
@@ -0,0 +1,58 @@
+/*
+   GoToSocial
+   Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Affero General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package user
+
+import (
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+	"github.com/sirupsen/logrus"
+	"github.com/superseriousbusiness/gotosocial/internal/message"
+)
+
+// InboxPOSTHandler deals with incoming POST requests to an actor's inbox.
+// Eg., POST to https://example.org/users/whatever/inbox.
+func (m *Module) InboxPOSTHandler(c *gin.Context) {
+	l := m.log.WithFields(logrus.Fields{
+		"func": "InboxPOSTHandler",
+		"url":  c.Request.RequestURI,
+	})
+
+	requestedUsername := c.Param(UsernameKey)
+	if requestedUsername == "" {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "no username specified in request"})
+		return
+	}
+
+	posted, err := m.processor.InboxPost(c.Request.Context(), c.Writer, c.Request)
+	if err != nil {
+		if withCode, ok := err.(message.ErrorWithCode); ok {
+			l.Debug(withCode.Error())
+			c.JSON(withCode.Code(), withCode.Safe())
+			return
+		}
+		l.Debug(err)
+		c.JSON(http.StatusBadRequest, gin.H{"error": "unable to process request"})
+		return
+	}
+
+	if !posted {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "unable to process request"})
+	}
+}
diff --git a/internal/api/s2s/user/user.go b/internal/api/s2s/user/user.go
index 693fac7c3..a6116247d 100644
--- a/internal/api/s2s/user/user.go
+++ b/internal/api/s2s/user/user.go
@@ -38,6 +38,8 @@ const (
 	// Use this anywhere you need to know the username of the user being queried.
 	// Eg https://example.org/users/:username
 	UsersBasePathWithUsername = UsersBasePath + "/:" + UsernameKey
+	// UsersInboxPath is for serving POST requests to a user's inbox with the given username key.
+	UsersInboxPath = UsersBasePathWithUsername + "/" + util.InboxPath
 )
 
 // ActivityPubAcceptHeaders represents the Accept headers mentioned here:
@@ -66,5 +68,6 @@ func New(config *config.Config, processor message.Processor, log *logrus.Logger)
 // Route satisfies the RESTAPIModule interface
 func (m *Module) Route(s router.Router) error {
 	s.AttachHandler(http.MethodGet, UsersBasePathWithUsername, m.UsersGETHandler)
+	s.AttachHandler(http.MethodPost, UsersInboxPath, m.InboxPOSTHandler)
 	return nil
 }