nodeinfo compliance (#61)

internal/api/model/webfinger.go

@@ -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"`
-}

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{}

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
+}

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)
+}

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)
+}

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")
 }

internal/cliactions/server/server.go

@@ -26,6 +26,7 @@ import (
 	"github.com/superseriousbusiness/gotosocial/internal/api/client/status"
 	"github.com/superseriousbusiness/gotosocial/internal/api/client/streaming"
 	"github.com/superseriousbusiness/gotosocial/internal/api/client/timeline"
+	"github.com/superseriousbusiness/gotosocial/internal/api/s2s/nodeinfo"
 	"github.com/superseriousbusiness/gotosocial/internal/api/s2s/user"
 	"github.com/superseriousbusiness/gotosocial/internal/api/s2s/webfinger"
 	"github.com/superseriousbusiness/gotosocial/internal/api/security"
@@ -124,6 +125,7 @@ var Start cliactions.GTSAction = func(ctx context.Context, c *config.Config, log
 	appsModule := app.New(c, processor, log)
 	followRequestsModule := followrequest.New(c, processor, log)
 	webfingerModule := webfinger.New(c, processor, log)
+	nodeInfoModule := nodeinfo.New(c, processor, log)
 	webBaseModule := web.New(c, processor, log)
 	usersModule := user.New(c, processor, log)
 	timelineModule := timeline.New(c, processor, log)
@@ -155,6 +157,7 @@ var Start cliactions.GTSAction = func(ctx context.Context, c *config.Config, log
 		adminModule,
 		statusModule,
 		webfingerModule,
+		nodeInfoModule,
 		usersModule,
 		timelineModule,
 		notificationModule,

internal/cliactions/testrig/testrig.go

@@ -28,6 +28,7 @@ import (
 	"github.com/superseriousbusiness/gotosocial/internal/api/client/status"
 	"github.com/superseriousbusiness/gotosocial/internal/api/client/streaming"
 	"github.com/superseriousbusiness/gotosocial/internal/api/client/timeline"
+	"github.com/superseriousbusiness/gotosocial/internal/api/s2s/nodeinfo"
 	"github.com/superseriousbusiness/gotosocial/internal/api/s2s/user"
 	"github.com/superseriousbusiness/gotosocial/internal/api/s2s/webfinger"
 	"github.com/superseriousbusiness/gotosocial/internal/api/security"
@@ -70,6 +71,7 @@ var Start cliactions.GTSAction = func(ctx context.Context, _ *config.Config, log
 	appsModule := app.New(c, processor, log)
 	followRequestsModule := followrequest.New(c, processor, log)
 	webfingerModule := webfinger.New(c, processor, log)
+	nodeInfoModule := nodeinfo.New(c, processor, log)
 	webBaseModule := web.New(c, processor, log)
 	usersModule := user.New(c, processor, log)
 	timelineModule := timeline.New(c, processor, log)
@@ -101,6 +103,7 @@ var Start cliactions.GTSAction = func(ctx context.Context, _ *config.Config, log
 		adminModule,
 		statusModule,
 		webfingerModule,
+		nodeInfoModule,
 		usersModule,
 		timelineModule,
 		notificationModule,

internal/config/config.go

@@ -59,9 +59,9 @@ type Config struct {
 
 	/*
 		Not parsed from .yaml configuration file.
-		For short running commands (admin CLI tools etc).
 	*/
 	AccountCLIFlags map[string]string
+	SoftwareVersion string
 }
 
 // FromFile returns a new config from a file, or an error if something goes amiss.
@@ -252,6 +252,8 @@ func (c *Config) ParseCLIFlags(f KeyedFlags) error {
 		c.LetsEncryptConfig.EmailAddress = f.String(fn.LetsEncryptEmailAddress)
 	}
 
+	c.SoftwareVersion = GetDefaults().SoftwareVersion
+
 	// command-specific flags
 
 	// admin account CLI flags
@@ -323,6 +325,7 @@ type Defaults struct {
 	ConfigPath      string
 	Host            string
 	Protocol        string
+	SoftwareVersion string
 
 	DbType     string
 	DbAddress  string

internal/config/default.go

@@ -1,5 +1,7 @@
 package config
 
+const softwareVersion = "0.1.0-SNAPSHOT"
+
 // TestDefault returns a default config for testing
 func TestDefault() *Config {
 	defaults := GetTestDefaults()
@@ -8,6 +10,7 @@ func TestDefault() *Config {
 		ApplicationName: defaults.ApplicationName,
 		Host:            defaults.Host,
 		Protocol:        defaults.Protocol,
+		SoftwareVersion: defaults.SoftwareVersion,
 		DBConfig: &DBConfig{
 			Type:            defaults.DbType,
 			Address:         defaults.DbAddress,
@@ -62,6 +65,7 @@ func Default() *Config {
 		ApplicationName: defaults.ApplicationName,
 		Host:            defaults.Host,
 		Protocol:        defaults.Protocol,
+		SoftwareVersion: defaults.SoftwareVersion,
 		DBConfig: &DBConfig{
 			Type:            defaults.DbType,
 			Address:         defaults.DbAddress,
@@ -117,6 +121,7 @@ func GetDefaults() Defaults {
 		ConfigPath:      "",
 		Host:            "",
 		Protocol:        "https",
+		SoftwareVersion: softwareVersion,
 
 		DbType:     "postgres",
 		DbAddress:  "localhost",
@@ -163,6 +168,7 @@ func GetTestDefaults() Defaults {
 		ConfigPath:      "",
 		Host:            "localhost:8080",
 		Protocol:        "http",
+		SoftwareVersion: softwareVersion,
 
 		DbType:     "postgres",
 		DbAddress:  "localhost",

internal/federation/finger.go

@@ -41,7 +41,7 @@ func (f *federator) FingerRemoteAccount(requestingUsername string, targetUsernam
 		return nil, fmt.Errorf("FingerRemoteAccount: error doing request on behalf of username %s while dereferencing @%s@%s: %s", requestingUsername, targetUsername, targetDomain, err)
 	}
 
-	resp := &apimodel.WebfingerAccountResponse{}
+	resp := &apimodel.WellKnownResponse{}
 	if err := json.Unmarshal(b, resp); err != nil {
 		return nil, fmt.Errorf("FingerRemoteAccount: could not unmarshal server response as WebfingerAccountResponse on behalf of username %s while dereferencing @%s@%s: %s", requestingUsername, targetUsername, targetDomain, err)
 	}

internal/processing/federation.go

@@ -265,7 +265,7 @@ func (p *processor) GetFediStatus(requestedUsername string, requestedStatusID st
 	return data, nil
 }
 
-func (p *processor) GetWebfingerAccount(requestedUsername string, request *http.Request) (*apimodel.WebfingerAccountResponse, gtserror.WithCode) {
+func (p *processor) GetWebfingerAccount(requestedUsername string, request *http.Request) (*apimodel.WellKnownResponse, gtserror.WithCode) {
 	// get the account the request is referring to
 	requestedAccount := &gtsmodel.Account{}
 	if err := p.db.GetLocalAccountByUsername(requestedUsername, requestedAccount); err != nil {
@@ -273,13 +273,13 @@ func (p *processor) GetWebfingerAccount(requestedUsername string, request *http.
 	}
 
 	// return the webfinger representation
-	return &apimodel.WebfingerAccountResponse{
+	return &apimodel.WellKnownResponse{
 		Subject: fmt.Sprintf("acct:%s@%s", requestedAccount.Username, p.config.Host),
 		Aliases: []string{
 			requestedAccount.URI,
 			requestedAccount.URL,
 		},
-		Links: []apimodel.WebfingerLink{
+		Links: []apimodel.Link{
 			{
 				Rel:  "http://webfinger.net/rel/profile-page",
 				Type: "text/html",
@@ -294,6 +294,37 @@ func (p *processor) GetWebfingerAccount(requestedUsername string, request *http.
 	}, nil
 }
 
+func (p *processor) GetNodeInfoRel(request *http.Request) (*apimodel.WellKnownResponse, gtserror.WithCode) {
+	return &apimodel.WellKnownResponse{
+		Links: []apimodel.Link{
+			{
+				Rel:  "http://nodeinfo.diaspora.software/ns/schema/2.0",
+				Href: fmt.Sprintf("%s://%s/nodeinfo/2.0", p.config.Protocol, p.config.Host),
+			},
+		},
+	}, nil
+}
+
+func (p *processor) GetNodeInfo(request *http.Request) (*apimodel.Nodeinfo, gtserror.WithCode) {
+	return &apimodel.Nodeinfo{
+		Version: "2.0",
+		Software: apimodel.NodeInfoSoftware{
+			Name:    "gotosocial",
+			Version: p.config.SoftwareVersion,
+		},
+		Protocols: []string{"activitypub"},
+		Services: apimodel.NodeInfoServices{
+			Inbound:  []string{},
+			Outbound: []string{},
+		},
+		OpenRegistrations: p.config.AccountsConfig.OpenRegistration,
+		Usage: apimodel.NodeInfoUsage{
+			Users: apimodel.NodeInfoUsers{},
+		},
+		Metadata: make(map[string]interface{}),
+	}, nil
+}
+
 func (p *processor) InboxPost(ctx context.Context, w http.ResponseWriter, r *http.Request) (bool, error) {
 	contextWithChannel := context.WithValue(ctx, util.APFromFederatorChanKey, p.fromFederator)
 	posted, err := p.federator.FederatingActor().PostInbox(contextWithChannel, w, r)

internal/processing/processor.go

@@ -169,7 +169,13 @@ type Processor interface {
 	GetFediStatus(requestedUsername string, requestedStatusID string, request *http.Request) (interface{}, gtserror.WithCode)
 
 	// GetWebfingerAccount handles the GET for a webfinger resource. Most commonly, it will be used for returning account lookups.
-	GetWebfingerAccount(requestedUsername string, request *http.Request) (*apimodel.WebfingerAccountResponse, gtserror.WithCode)
+	GetWebfingerAccount(requestedUsername string, request *http.Request) (*apimodel.WellKnownResponse, gtserror.WithCode)
+
+	// GetNodeInfoRel returns a well known response giving the path to node info.
+	GetNodeInfoRel(request *http.Request) (*apimodel.WellKnownResponse, gtserror.WithCode)
+
+	// GetNodeInfo returns a node info struct in response to a node info request.
+	GetNodeInfo(request *http.Request) (*apimodel.Nodeinfo, gtserror.WithCode)
 
 	// InboxPost handles POST requests to a user's inbox for new activitypub messages.
 	//

internal/typeutils/internaltofrontend.go

@@ -543,6 +543,7 @@ func (c *converter) InstanceToMasto(i *gtsmodel.Instance) (*model.Instance, erro
 		mi.URLS = &model.InstanceURLs{
 			StreamingAPI: fmt.Sprintf("wss://%s", c.config.Host),
 		}
+		mi.Version = c.config.SoftwareVersion
 	}
 
 	// get the instance account if it exists and just skip if it doesn't