mirror of
https://github.com/superseriousbusiness/gotosocial.git
synced 2024-10-18 00:02:49 +02:00
302 lines
11 KiB
Go
302 lines
11 KiB
Go
/*
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GoToSocial
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Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package processing
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import (
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"context"
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"fmt"
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"net/http"
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"net/url"
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"github.com/go-fed/activity/streams"
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apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
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"github.com/superseriousbusiness/gotosocial/internal/db"
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"github.com/superseriousbusiness/gotosocial/internal/gtserror"
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"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
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"github.com/superseriousbusiness/gotosocial/internal/id"
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"github.com/superseriousbusiness/gotosocial/internal/util"
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)
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// authenticateAndDereferenceFediRequest authenticates the HTTP signature of an incoming federation request, using the given
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// username to perform the validation. It will *also* dereference the originator of the request and return it as a gtsmodel account
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// for further processing. NOTE that this function will have the side effect of putting the dereferenced account into the database,
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// and passing it into the processor through a channel for further asynchronous processing.
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func (p *processor) authenticateAndDereferenceFediRequest(username string, r *http.Request) (*gtsmodel.Account, error) {
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// first authenticate
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requestingAccountURI, err := p.federator.AuthenticateFederatedRequest(username, r)
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if err != nil {
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return nil, fmt.Errorf("couldn't authenticate request for username %s: %s", username, err)
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}
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// OK now we can do the dereferencing part
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// we might already have an entry for this account so check that first
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requestingAccount := >smodel.Account{}
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err = p.db.GetWhere([]db.Where{{Key: "uri", Value: requestingAccountURI.String()}}, requestingAccount)
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if err == nil {
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// we do have it yay, return it
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return requestingAccount, nil
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}
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if _, ok := err.(db.ErrNoEntries); !ok {
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// something has actually gone wrong so bail
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return nil, fmt.Errorf("database error getting account with uri %s: %s", requestingAccountURI.String(), err)
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}
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// we just don't have an entry for this account yet
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// what we do now should depend on our chosen federation method
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// for now though, we'll just dereference it
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// TODO: slow-fed
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requestingPerson, err := p.federator.DereferenceRemoteAccount(username, requestingAccountURI)
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if err != nil {
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return nil, fmt.Errorf("couldn't dereference %s: %s", requestingAccountURI.String(), err)
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}
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// convert it to our internal account representation
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requestingAccount, err = p.tc.ASRepresentationToAccount(requestingPerson, false)
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if err != nil {
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return nil, fmt.Errorf("couldn't convert dereferenced uri %s to gtsmodel account: %s", requestingAccountURI.String(), err)
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}
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requestingAccountID, err := id.NewRandomULID()
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if err != nil {
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return nil, err
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}
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requestingAccount.ID = requestingAccountID
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if err := p.db.Put(requestingAccount); err != nil {
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return nil, fmt.Errorf("database error inserting account with uri %s: %s", requestingAccountURI.String(), err)
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}
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// put it in our channel to queue it for async processing
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p.fromFederator <- gtsmodel.FromFederator{
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APObjectType: gtsmodel.ActivityStreamsProfile,
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APActivityType: gtsmodel.ActivityStreamsCreate,
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GTSModel: requestingAccount,
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}
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return requestingAccount, nil
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}
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func (p *processor) GetFediUser(requestedUsername string, request *http.Request) (interface{}, gtserror.WithCode) {
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// get the account the request is referring to
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requestedAccount := >smodel.Account{}
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if err := p.db.GetLocalAccountByUsername(requestedUsername, requestedAccount); err != nil {
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return nil, gtserror.NewErrorNotFound(fmt.Errorf("database error getting account with username %s: %s", requestedUsername, err))
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}
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// authenticate the request
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requestingAccount, err := p.authenticateAndDereferenceFediRequest(requestedUsername, request)
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if err != nil {
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return nil, gtserror.NewErrorNotAuthorized(err)
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}
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blocked, err := p.db.Blocked(requestedAccount.ID, requestingAccount.ID)
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if err != nil {
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return nil, gtserror.NewErrorInternalError(err)
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}
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if blocked {
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return nil, gtserror.NewErrorNotAuthorized(fmt.Errorf("block exists between accounts %s and %s", requestedAccount.ID, requestingAccount.ID))
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}
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requestedPerson, err := p.tc.AccountToAS(requestedAccount)
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if err != nil {
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return nil, gtserror.NewErrorInternalError(err)
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}
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data, err := streams.Serialize(requestedPerson)
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if err != nil {
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return nil, gtserror.NewErrorInternalError(err)
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}
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return data, nil
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}
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func (p *processor) GetFediFollowers(requestedUsername string, request *http.Request) (interface{}, gtserror.WithCode) {
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// get the account the request is referring to
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requestedAccount := >smodel.Account{}
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if err := p.db.GetLocalAccountByUsername(requestedUsername, requestedAccount); err != nil {
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return nil, gtserror.NewErrorNotFound(fmt.Errorf("database error getting account with username %s: %s", requestedUsername, err))
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}
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// authenticate the request
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requestingAccount, err := p.authenticateAndDereferenceFediRequest(requestedUsername, request)
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if err != nil {
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return nil, gtserror.NewErrorNotAuthorized(err)
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}
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blocked, err := p.db.Blocked(requestedAccount.ID, requestingAccount.ID)
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if err != nil {
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return nil, gtserror.NewErrorInternalError(err)
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}
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if blocked {
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return nil, gtserror.NewErrorNotAuthorized(fmt.Errorf("block exists between accounts %s and %s", requestedAccount.ID, requestingAccount.ID))
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}
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requestedAccountURI, err := url.Parse(requestedAccount.URI)
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if err != nil {
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return nil, gtserror.NewErrorInternalError(fmt.Errorf("error parsing url %s: %s", requestedAccount.URI, err))
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}
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requestedFollowers, err := p.federator.FederatingDB().Followers(context.Background(), requestedAccountURI)
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if err != nil {
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return nil, gtserror.NewErrorInternalError(fmt.Errorf("error fetching followers for uri %s: %s", requestedAccountURI.String(), err))
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}
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data, err := streams.Serialize(requestedFollowers)
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if err != nil {
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return nil, gtserror.NewErrorInternalError(err)
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}
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return data, nil
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}
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func (p *processor) GetFediFollowing(requestedUsername string, request *http.Request) (interface{}, gtserror.WithCode) {
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// get the account the request is referring to
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requestedAccount := >smodel.Account{}
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if err := p.db.GetLocalAccountByUsername(requestedUsername, requestedAccount); err != nil {
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return nil, gtserror.NewErrorNotFound(fmt.Errorf("database error getting account with username %s: %s", requestedUsername, err))
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}
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// authenticate the request
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requestingAccount, err := p.authenticateAndDereferenceFediRequest(requestedUsername, request)
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if err != nil {
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return nil, gtserror.NewErrorNotAuthorized(err)
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}
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blocked, err := p.db.Blocked(requestedAccount.ID, requestingAccount.ID)
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if err != nil {
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return nil, gtserror.NewErrorInternalError(err)
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}
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if blocked {
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return nil, gtserror.NewErrorNotAuthorized(fmt.Errorf("block exists between accounts %s and %s", requestedAccount.ID, requestingAccount.ID))
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}
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requestedAccountURI, err := url.Parse(requestedAccount.URI)
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if err != nil {
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return nil, gtserror.NewErrorInternalError(fmt.Errorf("error parsing url %s: %s", requestedAccount.URI, err))
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}
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requestedFollowing, err := p.federator.FederatingDB().Following(context.Background(), requestedAccountURI)
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if err != nil {
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return nil, gtserror.NewErrorInternalError(fmt.Errorf("error fetching following for uri %s: %s", requestedAccountURI.String(), err))
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}
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data, err := streams.Serialize(requestedFollowing)
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if err != nil {
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return nil, gtserror.NewErrorInternalError(err)
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}
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return data, nil
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}
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func (p *processor) GetFediStatus(requestedUsername string, requestedStatusID string, request *http.Request) (interface{}, gtserror.WithCode) {
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// get the account the request is referring to
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requestedAccount := >smodel.Account{}
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if err := p.db.GetLocalAccountByUsername(requestedUsername, requestedAccount); err != nil {
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return nil, gtserror.NewErrorNotFound(fmt.Errorf("database error getting account with username %s: %s", requestedUsername, err))
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}
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// authenticate the request
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requestingAccount, err := p.authenticateAndDereferenceFediRequest(requestedUsername, request)
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if err != nil {
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return nil, gtserror.NewErrorNotAuthorized(err)
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}
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// authorize the request:
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// 1. check if a block exists between the requester and the requestee
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blocked, err := p.db.Blocked(requestedAccount.ID, requestingAccount.ID)
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if err != nil {
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return nil, gtserror.NewErrorInternalError(err)
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}
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if blocked {
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return nil, gtserror.NewErrorNotAuthorized(fmt.Errorf("block exists between accounts %s and %s", requestedAccount.ID, requestingAccount.ID))
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}
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// get the status out of the database here
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s := >smodel.Status{}
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if err := p.db.GetWhere([]db.Where{
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{Key: "id", Value: requestedStatusID},
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{Key: "account_id", Value: requestedAccount.ID},
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}, s); err != nil {
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return nil, gtserror.NewErrorNotFound(fmt.Errorf("database error getting status with id %s and account id %s: %s", requestedStatusID, requestedAccount.ID, err))
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}
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visible, err := p.filter.StatusVisible(s, requestingAccount)
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if err != nil {
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return nil, gtserror.NewErrorInternalError(err)
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}
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if !visible {
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return nil, gtserror.NewErrorNotFound(fmt.Errorf("status with id %s not visible to user with id %s", s.ID, requestingAccount.ID))
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}
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// requester is authorized to view the status, so convert it to AP representation and serialize it
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asStatus, err := p.tc.StatusToAS(s)
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if err != nil {
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return nil, gtserror.NewErrorInternalError(err)
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}
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data, err := streams.Serialize(asStatus)
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if err != nil {
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return nil, gtserror.NewErrorInternalError(err)
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}
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return data, nil
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}
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func (p *processor) GetWebfingerAccount(requestedUsername string, request *http.Request) (*apimodel.WebfingerAccountResponse, gtserror.WithCode) {
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// get the account the request is referring to
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requestedAccount := >smodel.Account{}
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if err := p.db.GetLocalAccountByUsername(requestedUsername, requestedAccount); err != nil {
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return nil, gtserror.NewErrorNotFound(fmt.Errorf("database error getting account with username %s: %s", requestedUsername, err))
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}
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// return the webfinger representation
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return &apimodel.WebfingerAccountResponse{
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Subject: fmt.Sprintf("acct:%s@%s", requestedAccount.Username, p.config.Host),
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Aliases: []string{
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requestedAccount.URI,
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requestedAccount.URL,
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},
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Links: []apimodel.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: requestedAccount.URL,
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},
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{
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Rel: "self",
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Type: "application/activity+json",
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Href: requestedAccount.URI,
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},
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},
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}, nil
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}
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func (p *processor) InboxPost(ctx context.Context, w http.ResponseWriter, r *http.Request) (bool, error) {
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contextWithChannel := context.WithValue(ctx, util.APFromFederatorChanKey, p.fromFederator)
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posted, err := p.federator.FederatingActor().PostInbox(contextWithChannel, w, r)
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return posted, err
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}
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