GoToSocial/internal/processing/federation.go

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/*
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 processing
import (
"context"
"errors"
"fmt"
"net/http"
"net/url"
"github.com/go-fed/activity/streams"
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"github.com/go-fed/activity/streams/vocab"
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apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
"github.com/superseriousbusiness/gotosocial/internal/db"
"github.com/superseriousbusiness/gotosocial/internal/gtserror"
"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
"github.com/superseriousbusiness/gotosocial/internal/util"
)
func (p *processor) GetFediUser(ctx context.Context, requestedUsername string, requestURL *url.URL) (interface{}, gtserror.WithCode) {
// get the account the request is referring to
requestedAccount, err := p.db.GetLocalAccountByUsername(ctx, requestedUsername)
if err != nil {
return nil, gtserror.NewErrorNotFound(fmt.Errorf("database error getting account with username %s: %s", requestedUsername, err))
}
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var requestedPerson vocab.ActivityStreamsPerson
if util.IsPublicKeyPath(requestURL) {
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// if it's a public key path, we don't need to authenticate but we'll only serve the bare minimum user profile needed for the public key
requestedPerson, err = p.tc.AccountToASMinimal(ctx, requestedAccount)
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if err != nil {
return nil, gtserror.NewErrorInternalError(err)
}
} else if util.IsUserPath(requestURL) {
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// if it's a user path, we want to fully authenticate the request before we serve any data, and then we can serve a more complete profile
requestingAccountURI, authenticated, err := p.federator.AuthenticateFederatedRequest(ctx, requestedUsername)
if err != nil || !authenticated {
return nil, gtserror.NewErrorNotAuthorized(errors.New("not authorized"), "not authorized")
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}
// if we're not already handshaking/dereferencing a remote account, dereference it now
if !p.federator.Handshaking(ctx, requestedUsername, requestingAccountURI) {
requestingAccount, _, err := p.federator.GetRemoteAccount(ctx, requestedUsername, requestingAccountURI, false)
if err != nil {
return nil, gtserror.NewErrorNotAuthorized(err)
}
blocked, err := p.db.IsBlocked(ctx, requestedAccount.ID, requestingAccount.ID, true)
if err != nil {
return nil, gtserror.NewErrorInternalError(err)
}
if blocked {
return nil, gtserror.NewErrorNotAuthorized(fmt.Errorf("block exists between accounts %s and %s", requestedAccount.ID, requestingAccount.ID))
}
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}
requestedPerson, err = p.tc.AccountToAS(ctx, requestedAccount)
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if err != nil {
return nil, gtserror.NewErrorInternalError(err)
}
} else {
return nil, gtserror.NewErrorBadRequest(fmt.Errorf("path was not public key path or user path"))
}
data, err := streams.Serialize(requestedPerson)
if err != nil {
return nil, gtserror.NewErrorInternalError(err)
}
return data, nil
}
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func (p *processor) GetFediFollowers(ctx context.Context, requestedUsername string, requestURL *url.URL) (interface{}, gtserror.WithCode) {
// get the account the request is referring to
requestedAccount, err := p.db.GetLocalAccountByUsername(ctx, requestedUsername)
if err != nil {
return nil, gtserror.NewErrorNotFound(fmt.Errorf("database error getting account with username %s: %s", requestedUsername, err))
}
// authenticate the request
requestingAccountURI, authenticated, err := p.federator.AuthenticateFederatedRequest(ctx, requestedUsername)
if err != nil || !authenticated {
return nil, gtserror.NewErrorNotAuthorized(errors.New("not authorized"), "not authorized")
}
requestingAccount, _, err := p.federator.GetRemoteAccount(ctx, requestedUsername, requestingAccountURI, false)
if err != nil {
return nil, gtserror.NewErrorNotAuthorized(err)
}
blocked, err := p.db.IsBlocked(ctx, requestedAccount.ID, requestingAccount.ID, true)
if err != nil {
return nil, gtserror.NewErrorInternalError(err)
}
if blocked {
return nil, gtserror.NewErrorNotAuthorized(fmt.Errorf("block exists between accounts %s and %s", requestedAccount.ID, requestingAccount.ID))
}
requestedAccountURI, err := url.Parse(requestedAccount.URI)
if err != nil {
return nil, gtserror.NewErrorInternalError(fmt.Errorf("error parsing url %s: %s", requestedAccount.URI, err))
}
requestedFollowers, err := p.federator.FederatingDB().Followers(ctx, requestedAccountURI)
if err != nil {
return nil, gtserror.NewErrorInternalError(fmt.Errorf("error fetching followers for uri %s: %s", requestedAccountURI.String(), err))
}
data, err := streams.Serialize(requestedFollowers)
if err != nil {
return nil, gtserror.NewErrorInternalError(err)
}
return data, nil
}
func (p *processor) GetFediFollowing(ctx context.Context, requestedUsername string, requestURL *url.URL) (interface{}, gtserror.WithCode) {
// get the account the request is referring to
requestedAccount, err := p.db.GetLocalAccountByUsername(ctx, requestedUsername)
if err != nil {
return nil, gtserror.NewErrorNotFound(fmt.Errorf("database error getting account with username %s: %s", requestedUsername, err))
}
// authenticate the request
requestingAccountURI, authenticated, err := p.federator.AuthenticateFederatedRequest(ctx, requestedUsername)
if err != nil || !authenticated {
return nil, gtserror.NewErrorNotAuthorized(errors.New("not authorized"), "not authorized")
}
requestingAccount, _, err := p.federator.GetRemoteAccount(ctx, requestedUsername, requestingAccountURI, false)
if err != nil {
return nil, gtserror.NewErrorNotAuthorized(err)
}
blocked, err := p.db.IsBlocked(ctx, requestedAccount.ID, requestingAccount.ID, true)
if err != nil {
return nil, gtserror.NewErrorInternalError(err)
}
if blocked {
return nil, gtserror.NewErrorNotAuthorized(fmt.Errorf("block exists between accounts %s and %s", requestedAccount.ID, requestingAccount.ID))
}
requestedAccountURI, err := url.Parse(requestedAccount.URI)
if err != nil {
return nil, gtserror.NewErrorInternalError(fmt.Errorf("error parsing url %s: %s", requestedAccount.URI, err))
}
requestedFollowing, err := p.federator.FederatingDB().Following(ctx, requestedAccountURI)
if err != nil {
return nil, gtserror.NewErrorInternalError(fmt.Errorf("error fetching following for uri %s: %s", requestedAccountURI.String(), err))
}
data, err := streams.Serialize(requestedFollowing)
if err != nil {
return nil, gtserror.NewErrorInternalError(err)
}
return data, nil
}
func (p *processor) GetFediStatus(ctx context.Context, requestedUsername string, requestedStatusID string, requestURL *url.URL) (interface{}, gtserror.WithCode) {
// get the account the request is referring to
requestedAccount, err := p.db.GetLocalAccountByUsername(ctx, requestedUsername)
if err != nil {
return nil, gtserror.NewErrorNotFound(fmt.Errorf("database error getting account with username %s: %s", requestedUsername, err))
}
// authenticate the request
requestingAccountURI, authenticated, err := p.federator.AuthenticateFederatedRequest(ctx, requestedUsername)
if err != nil || !authenticated {
return nil, gtserror.NewErrorNotAuthorized(errors.New("not authorized"), "not authorized")
}
requestingAccount, _, err := p.federator.GetRemoteAccount(ctx, requestedUsername, requestingAccountURI, false)
if err != nil {
return nil, gtserror.NewErrorNotAuthorized(err)
}
// authorize the request:
// 1. check if a block exists between the requester and the requestee
blocked, err := p.db.IsBlocked(ctx, requestedAccount.ID, requestingAccount.ID, true)
if err != nil {
return nil, gtserror.NewErrorInternalError(err)
}
if blocked {
return nil, gtserror.NewErrorNotAuthorized(fmt.Errorf("block exists between accounts %s and %s", requestedAccount.ID, requestingAccount.ID))
}
// get the status out of the database here
s := &gtsmodel.Status{}
if err := p.db.GetWhere(ctx, []db.Where{
{Key: "id", Value: requestedStatusID},
{Key: "account_id", Value: requestedAccount.ID},
}, s); err != nil {
return nil, gtserror.NewErrorNotFound(fmt.Errorf("database error getting status with id %s and account id %s: %s", requestedStatusID, requestedAccount.ID, err))
}
visible, err := p.filter.StatusVisible(ctx, s, requestingAccount)
if err != nil {
return nil, gtserror.NewErrorInternalError(err)
}
if !visible {
return nil, gtserror.NewErrorNotFound(fmt.Errorf("status with id %s not visible to user with id %s", s.ID, requestingAccount.ID))
}
// requester is authorized to view the status, so convert it to AP representation and serialize it
asStatus, err := p.tc.StatusToAS(ctx, s)
if err != nil {
return nil, gtserror.NewErrorInternalError(err)
}
data, err := streams.Serialize(asStatus)
if err != nil {
return nil, gtserror.NewErrorInternalError(err)
}
return data, nil
}
func (p *processor) GetFediStatusReplies(ctx context.Context, requestedUsername string, requestedStatusID string, page bool, onlyOtherAccounts bool, minID string, requestURL *url.URL) (interface{}, gtserror.WithCode) {
// get the account the request is referring to
requestedAccount, err := p.db.GetLocalAccountByUsername(ctx, requestedUsername)
if err != nil {
return nil, gtserror.NewErrorNotFound(fmt.Errorf("database error getting account with username %s: %s", requestedUsername, err))
}
// authenticate the request
requestingAccountURI, authenticated, err := p.federator.AuthenticateFederatedRequest(ctx, requestedUsername)
if err != nil || !authenticated {
return nil, gtserror.NewErrorNotAuthorized(errors.New("not authorized"), "not authorized")
}
requestingAccount, _, err := p.federator.GetRemoteAccount(ctx, requestedUsername, requestingAccountURI, false)
if err != nil {
return nil, gtserror.NewErrorNotAuthorized(err)
}
// authorize the request:
// 1. check if a block exists between the requester and the requestee
blocked, err := p.db.IsBlocked(ctx, requestedAccount.ID, requestingAccount.ID, true)
if err != nil {
return nil, gtserror.NewErrorInternalError(err)
}
if blocked {
return nil, gtserror.NewErrorNotAuthorized(fmt.Errorf("block exists between accounts %s and %s", requestedAccount.ID, requestingAccount.ID))
}
// get the status out of the database here
s := &gtsmodel.Status{}
if err := p.db.GetWhere(ctx, []db.Where{
{Key: "id", Value: requestedStatusID},
{Key: "account_id", Value: requestedAccount.ID},
}, s); err != nil {
return nil, gtserror.NewErrorNotFound(fmt.Errorf("database error getting status with id %s and account id %s: %s", requestedStatusID, requestedAccount.ID, err))
}
visible, err := p.filter.StatusVisible(ctx, s, requestingAccount)
if err != nil {
return nil, gtserror.NewErrorInternalError(err)
}
if !visible {
return nil, gtserror.NewErrorNotFound(fmt.Errorf("status with id %s not visible to user with id %s", s.ID, requestingAccount.ID))
}
var data map[string]interface{}
// now there are three scenarios:
// 1. we're asked for the whole collection and not a page -- we can just return the collection, with no items, but a link to 'first' page.
// 2. we're asked for a page but only_other_accounts has not been set in the query -- so we should just return the first page of the collection, with no items.
// 3. we're asked for a page, and only_other_accounts has been set, and min_id has optionally been set -- so we need to return some actual items!
if !page {
// scenario 1
// get the collection
collection, err := p.tc.StatusToASRepliesCollection(ctx, s, onlyOtherAccounts)
if err != nil {
return nil, gtserror.NewErrorInternalError(err)
}
data, err = streams.Serialize(collection)
if err != nil {
return nil, gtserror.NewErrorInternalError(err)
}
} else if page && requestURL.Query().Get("only_other_accounts") == "" {
// scenario 2
// get the collection
collection, err := p.tc.StatusToASRepliesCollection(ctx, s, onlyOtherAccounts)
if err != nil {
return nil, gtserror.NewErrorInternalError(err)
}
// but only return the first page
data, err = streams.Serialize(collection.GetActivityStreamsFirst().GetActivityStreamsCollectionPage())
if err != nil {
return nil, gtserror.NewErrorInternalError(err)
}
} else {
// scenario 3
// get immediate children
replies, err := p.db.GetStatusChildren(ctx, s, true, minID)
if err != nil {
return nil, gtserror.NewErrorInternalError(err)
}
// filter children and extract URIs
replyURIs := map[string]*url.URL{}
for _, r := range replies {
// only show public or unlocked statuses as replies
if r.Visibility != gtsmodel.VisibilityPublic && r.Visibility != gtsmodel.VisibilityUnlocked {
continue
}
// respect onlyOtherAccounts parameter
if onlyOtherAccounts && r.AccountID == requestedAccount.ID {
continue
}
// only show replies that the status owner can see
visibleToStatusOwner, err := p.filter.StatusVisible(ctx, r, requestedAccount)
if err != nil || !visibleToStatusOwner {
continue
}
// only show replies that the requester can see
visibleToRequester, err := p.filter.StatusVisible(ctx, r, requestingAccount)
if err != nil || !visibleToRequester {
continue
}
rURI, err := url.Parse(r.URI)
if err != nil {
continue
}
replyURIs[r.ID] = rURI
}
repliesPage, err := p.tc.StatusURIsToASRepliesPage(ctx, s, onlyOtherAccounts, minID, replyURIs)
if err != nil {
return nil, gtserror.NewErrorInternalError(err)
}
data, err = streams.Serialize(repliesPage)
if err != nil {
return nil, gtserror.NewErrorInternalError(err)
}
}
return data, nil
}
func (p *processor) GetWebfingerAccount(ctx context.Context, requestedUsername string) (*apimodel.WellKnownResponse, gtserror.WithCode) {
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// get the account the request is referring to
requestedAccount, err := p.db.GetLocalAccountByUsername(ctx, requestedUsername)
if err != nil {
return nil, gtserror.NewErrorNotFound(fmt.Errorf("database error getting account with username %s: %s", requestedUsername, err))
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}
// return the webfinger representation
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return &apimodel.WellKnownResponse{
Subject: fmt.Sprintf("acct:%s@%s", requestedAccount.Username, p.config.AccountDomain),
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Aliases: []string{
requestedAccount.URI,
requestedAccount.URL,
},
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Links: []apimodel.Link{
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{
Rel: "http://webfinger.net/rel/profile-page",
Type: "text/html",
Href: requestedAccount.URL,
},
{
Rel: "self",
Type: "application/activity+json",
Href: requestedAccount.URI,
},
},
}, nil
}
func (p *processor) GetNodeInfoRel(ctx context.Context, request *http.Request) (*apimodel.WellKnownResponse, gtserror.WithCode) {
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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(ctx context.Context, request *http.Request) (*apimodel.Nodeinfo, gtserror.WithCode) {
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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)
return p.federator.FederatingActor().PostInbox(contextWithChannel, w, r)
}