nodeinfo compliance (#61)

6 files changed, 226 insertions, 40 deletions

diff --git a/internal/api/model/webfinger.go b/internal/api/model/webfinger.go
deleted file mode 100644
index bb5008949..000000000
--- a/internal/api/model/webfinger.go
+++ /dev/null
@@ -1,39 +0,0 @@
-package model
-
-/*
-   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/>.
-*/
-
-// WebfingerAccountResponse represents the response to a webfinger request for an 'acct' resource.
-// For example, it would be returned from https://example.org/.well-known/webfinger?resource=acct:some_username@example.org
-//
-// See https://webfinger.net/
-type WebfingerAccountResponse struct {
-	Subject string          `json:"subject"`
-	Aliases []string        `json:"aliases"`
-	Links   []WebfingerLink `json:"links"`
-}
-
-// WebfingerLink represents one 'link' in a slice of webfinger links returned from a lookup request.
-//
-// See https://webfinger.net/
-type WebfingerLink struct {
-	Rel      string `json:"rel"`
-	Type     string `json:"type,omitempty"`
-	Href     string `json:"href,omitempty"`
-	Template string `json:"template,omitempty"`
-}
diff --git a/internal/api/model/well-known.go b/internal/api/model/well-known.go
new file mode 100644
index 000000000..945215e4e
--- /dev/null
+++ b/internal/api/model/well-known.go
@@ -0,0 +1,78 @@
+/*
+   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 model
+
+// WellKnownResponse represents the response to either a webfinger request for an 'acct' resource, or a request to nodeinfo.
+// For example, it would be returned from https://example.org/.well-known/webfinger?resource=acct:some_username@example.org
+//
+// See https://webfinger.net/
+type WellKnownResponse struct {
+	Subject string   `json:"subject,omitempty"`
+	Aliases []string `json:"aliases,omitempty"`
+	Links   []Link   `json:"links,omitempty"`
+}
+
+// Link represents one 'link' in a slice of links returned from a lookup request.
+//
+// See https://webfinger.net/
+type Link struct {
+	Rel      string `json:"rel"`
+	Type     string `json:"type,omitempty"`
+	Href     string `json:"href,omitempty"`
+	Template string `json:"template,omitempty"`
+}
+
+// Nodeinfo represents a version 2.1 or version 2.0 nodeinfo schema.
+// See: https://nodeinfo.diaspora.software/schema.html
+type Nodeinfo struct {
+	// The schema version
+	Version string `json:"version"`
+	// Metadata about server software in use.
+	Software NodeInfoSoftware `json:"software"`
+	// The protocols supported on this server.
+	Protocols []string `json:"protocols"`
+	// The third party sites this server can connect to via their application API.
+	Services NodeInfoServices `json:"services"`
+	// Whether this server allows open self-registration.
+	OpenRegistrations bool `json:"openRegistrations"`
+	// Usage statistics for this server.
+	Usage NodeInfoUsage `json:"usage"`
+	// Free form key value pairs for software specific values. Clients should not rely on any specific key present.
+	Metadata map[string]interface{} `json:"metadata"`
+}
+
+// NodeInfoSoftware represents the name and version number of the software of this node.
+type NodeInfoSoftware struct {
+	Name    string `json:"name"`
+	Version string `json:"version"`
+}
+
+// NodeInfoServices represents inbound and outbound services that this node offers connections to.
+type NodeInfoServices struct {
+	Inbound  []string `json:"inbound"`
+	Outbound []string `json:"outbound"`
+}
+
+// NodeInfoUsage represents usage information about this server, such as number of users.
+type NodeInfoUsage struct {
+	Users NodeInfoUsers `json:"users"`
+}
+
+// NodeInfoUsers is a stub for usage information, currently empty.
+type NodeInfoUsers struct{}
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)
+}
diff --git a/internal/api/security/extraheaders.go b/internal/api/security/extraheaders.go
index dfcddfbe1..bcb41e0c0 100644
--- a/internal/api/security/extraheaders.go
+++ b/internal/api/security/extraheaders.go
@@ -4,5 +4,5 @@ import "github.com/gin-gonic/gin"
 
 // ExtraHeaders adds any additional required headers to the response
 func (m *Module) ExtraHeaders(c *gin.Context) {
-	c.Header("Server", "Mastodon")
+	c.Header("Server", "gotosocial")
 }