3 files changed, 147 insertions, 0 deletions
diff --git a/internal/api/s2s/nodeinfo/nodeinfo.go b/internal/api/s2s/nodeinfo/nodeinfo.go
new file mode 100644
index 000000000..5febaf41f
--- /dev/null
+++ b/internal/api/s2s/nodeinfo/nodeinfo.go
@@ -0,0 +1,59 @@
+/*
+   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 nodeinfo
+
+import (
+	"net/http"
+
+	"github.com/sirupsen/logrus"
+	"github.com/superseriousbusiness/gotosocial/internal/api"
+	"github.com/superseriousbusiness/gotosocial/internal/config"
+	"github.com/superseriousbusiness/gotosocial/internal/processing"
+	"github.com/superseriousbusiness/gotosocial/internal/router"
+)
+
+const (
+	// NodeInfoWellKnownPath is the base path for serving responses to nodeinfo lookup requests.
+	NodeInfoWellKnownPath = ".well-known/nodeinfo"
+	// NodeInfoBasePath is the path for serving nodeinfo responses.
+	NodeInfoBasePath      = "/nodeinfo/2.0"
+)
+
+// Module implements the FederationModule interface
+type Module struct {
+	config    *config.Config
+	processor processing.Processor
+	log       *logrus.Logger
+}
+
+// New returns a new nodeinfo module
+func New(config *config.Config, processor processing.Processor, log *logrus.Logger) api.FederationModule {
+	return &Module{
+		config:    config,
+		processor: processor,
+		log:       log,
+	}
+}
+
+// Route satisfies the FederationModule interface
+func (m *Module) Route(s router.Router) error {
+	s.AttachHandler(http.MethodGet, NodeInfoWellKnownPath, m.NodeInfoWellKnownGETHandler)
+	s.AttachHandler(http.MethodGet, NodeInfoBasePath, m.NodeInfoGETHandler)
+	return nil
+}
diff --git a/internal/api/s2s/nodeinfo/nodeinfoget.go b/internal/api/s2s/nodeinfo/nodeinfoget.go
new file mode 100644
index 000000000..a54c8b190
--- /dev/null
+++ b/internal/api/s2s/nodeinfo/nodeinfoget.go
@@ -0,0 +1,44 @@
+/*
+   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 nodeinfo
+
+import (
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+	"github.com/sirupsen/logrus"
+)
+
+// NodeInfoGETHandler returns a compliant nodeinfo response to node info queries.
+// See: https://nodeinfo.diaspora.software/
+func (m *Module) NodeInfoGETHandler(c *gin.Context) {
+	l := m.log.WithFields(logrus.Fields{
+		"func":       "NodeInfoGETHandler",
+		"user-agent": c.Request.UserAgent(),
+	})
+
+	ni, err := m.processor.GetNodeInfo(c.Request)
+	if err != nil {
+		l.Debugf("error with get node info request: %s", err)
+		c.JSON(err.Code(), err.Safe())
+		return
+	}
+
+	c.JSON(http.StatusOK, ni)
+}
diff --git a/internal/api/s2s/nodeinfo/wellknownget.go b/internal/api/s2s/nodeinfo/wellknownget.go
new file mode 100644
index 000000000..614d2a9c6
--- /dev/null
+++ b/internal/api/s2s/nodeinfo/wellknownget.go
@@ -0,0 +1,44 @@
+/*
+   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 nodeinfo
+
+import (
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+	"github.com/sirupsen/logrus"
+)
+
+// NodeInfoWellKnownGETHandler returns a well known response to a query to /.well-known/nodeinfo,
+// directing (but not redirecting...) callers to the NodeInfoGETHandler.
+func (m *Module) NodeInfoWellKnownGETHandler(c *gin.Context) {
+	l := m.log.WithFields(logrus.Fields{
+		"func":       "NodeInfoWellKnownGETHandler",
+		"user-agent": c.Request.UserAgent(),
+	})
+
+	niRel, err := m.processor.GetNodeInfoRel(c.Request)
+	if err != nil {
+		l.Debugf("error with get node info rel request: %s", err)
+		c.JSON(err.Code(), err.Safe())
+		return
+	}
+
+	c.JSON(http.StatusOK, niRel)
+}