Add Webfinger endpoint (#19462)
This adds the [Webfinger](https://webfinger.net/) endpoint for federation. Supported schemes are `acct` and `mailto`. The profile and avatar url are returned as metadata.
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3 changed files with 189 additions and 2 deletions
68
integrations/webfinger_test.go
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68
integrations/webfinger_test.go
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// Copyright 2022 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package integrations
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import (
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"fmt"
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"net/http"
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"net/url"
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"testing"
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"code.gitea.io/gitea/models/unittest"
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user_model "code.gitea.io/gitea/models/user"
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"code.gitea.io/gitea/modules/setting"
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"github.com/stretchr/testify/assert"
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)
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func TestWebfinger(t *testing.T) {
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defer prepareTestEnv(t)()
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setting.Federation.Enabled = true
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defer func() {
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setting.Federation.Enabled = false
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}()
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user := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 2}).(*user_model.User)
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appURL, _ := url.Parse(setting.AppURL)
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type webfingerLink struct {
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Rel string `json:"rel,omitempty"`
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Type string `json:"type,omitempty"`
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Href string `json:"href,omitempty"`
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Titles map[string]string `json:"titles,omitempty"`
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Properties map[string]interface{} `json:"properties,omitempty"`
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}
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type webfingerJRD struct {
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Subject string `json:"subject,omitempty"`
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Aliases []string `json:"aliases,omitempty"`
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Properties map[string]interface{} `json:"properties,omitempty"`
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Links []*webfingerLink `json:"links,omitempty"`
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}
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session := loginUser(t, "user1")
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req := NewRequest(t, "GET", fmt.Sprintf("/.well-known/webfinger?resource=acct:%s@%s", user.LowerName, appURL.Host))
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resp := MakeRequest(t, req, http.StatusOK)
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var jrd webfingerJRD
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DecodeJSON(t, resp, &jrd)
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assert.Equal(t, "acct:user2@"+appURL.Host, jrd.Subject)
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assert.ElementsMatch(t, []string{user.HTMLURL()}, jrd.Aliases)
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req = NewRequest(t, "GET", fmt.Sprintf("/.well-known/webfinger?resource=acct:%s@%s", user.LowerName, "unknown.host"))
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MakeRequest(t, req, http.StatusBadRequest)
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req = NewRequest(t, "GET", fmt.Sprintf("/.well-known/webfinger?resource=acct:%s@%s", "user31", appURL.Host))
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MakeRequest(t, req, http.StatusNotFound)
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req = NewRequest(t, "GET", fmt.Sprintf("/.well-known/webfinger?resource=acct:%s@%s", "user31", appURL.Host))
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session.MakeRequest(t, req, http.StatusOK)
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req = NewRequest(t, "GET", fmt.Sprintf("/.well-known/webfinger?resource=mailto:%s", user.Email))
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MakeRequest(t, req, http.StatusNotFound)
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}
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@ -282,6 +282,13 @@ func RegisterRoutes(m *web.Route) {
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}
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}
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federationEnabled := func(ctx *context.Context) {
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if !setting.Federation.Enabled {
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ctx.Error(http.StatusNotFound)
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return
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}
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}
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// FIXME: not all routes need go through same middleware.
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// Especially some AJAX requests, we can reduce middleware number to improve performance.
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// Routers.
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@ -289,9 +296,10 @@ func RegisterRoutes(m *web.Route) {
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m.Get("/", Home)
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m.Group("/.well-known", func() {
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m.Get("/openid-configuration", auth.OIDCWellKnown)
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if setting.Federation.Enabled {
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m.Group("", func() {
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m.Get("/nodeinfo", NodeInfoLinks)
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}
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m.Get("/webfinger", WebfingerQuery)
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}, federationEnabled)
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m.Get("/change-password", func(w http.ResponseWriter, req *http.Request) {
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http.Redirect(w, req, "/user/settings/account", http.StatusTemporaryRedirect)
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})
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111
routers/web/webfinger.go
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111
routers/web/webfinger.go
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// Copyright 2022 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package web
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import (
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"fmt"
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"net/http"
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"net/url"
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"strings"
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user_model "code.gitea.io/gitea/models/user"
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"code.gitea.io/gitea/modules/context"
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"code.gitea.io/gitea/modules/log"
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"code.gitea.io/gitea/modules/setting"
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)
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// https://datatracker.ietf.org/doc/html/draft-ietf-appsawg-webfinger-14#section-4.4
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type webfingerJRD struct {
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Subject string `json:"subject,omitempty"`
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Aliases []string `json:"aliases,omitempty"`
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Properties map[string]interface{} `json:"properties,omitempty"`
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Links []*webfingerLink `json:"links,omitempty"`
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}
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type webfingerLink struct {
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Rel string `json:"rel,omitempty"`
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Type string `json:"type,omitempty"`
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Href string `json:"href,omitempty"`
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Titles map[string]string `json:"titles,omitempty"`
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Properties map[string]interface{} `json:"properties,omitempty"`
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}
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// WebfingerQuery returns informations about a resource
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// https://datatracker.ietf.org/doc/html/rfc7565
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func WebfingerQuery(ctx *context.Context) {
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appURL, _ := url.Parse(setting.AppURL)
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resource, err := url.Parse(ctx.FormTrim("resource"))
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if err != nil {
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ctx.Error(http.StatusBadRequest)
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return
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}
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var u *user_model.User
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switch resource.Scheme {
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case "acct":
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// allow only the current host
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parts := strings.SplitN(resource.Opaque, "@", 2)
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if len(parts) != 2 {
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ctx.Error(http.StatusBadRequest)
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return
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}
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if parts[1] != appURL.Host {
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ctx.Error(http.StatusBadRequest)
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return
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}
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u, err = user_model.GetUserByNameCtx(ctx, parts[0])
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case "mailto":
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u, err = user_model.GetUserByEmailContext(ctx, resource.Opaque)
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if u != nil && u.KeepEmailPrivate {
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err = user_model.ErrUserNotExist{}
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}
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default:
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ctx.Error(http.StatusBadRequest)
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return
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}
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if err != nil {
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if user_model.IsErrUserNotExist(err) {
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ctx.Error(http.StatusNotFound)
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} else {
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log.Error("Error getting user: %s Error: %v", resource.Opaque, err)
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ctx.Error(http.StatusInternalServerError)
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}
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return
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}
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if !user_model.IsUserVisibleToViewer(u, ctx.Doer) {
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ctx.Error(http.StatusNotFound)
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return
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}
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aliases := []string{
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u.HTMLURL(),
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}
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if !u.KeepEmailPrivate {
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aliases = append(aliases, fmt.Sprintf("mailto:%s", u.Email))
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}
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links := []*webfingerLink{
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{
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Rel: "http://webfinger.net/rel/profile-page",
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Type: "text/html",
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Href: u.HTMLURL(),
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},
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{
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Rel: "http://webfinger.net/rel/avatar",
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Href: u.AvatarLink(),
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},
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}
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ctx.JSON(http.StatusOK, &webfingerJRD{
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Subject: fmt.Sprintf("acct:%s@%s", url.QueryEscape(u.Name), appURL.Host),
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Aliases: aliases,
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Links: links,
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})
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}
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