337 lines
9.5 KiB
Go
337 lines
9.5 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 db
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import (
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"context"
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"errors"
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"fmt"
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"net/url"
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"regexp"
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"strings"
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"sync"
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"time"
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"github.com/go-fed/activity/streams"
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"github.com/go-fed/activity/streams/vocab"
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"github.com/go-pg/pg/extra/pgdebug"
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"github.com/go-pg/pg/v10"
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"github.com/go-pg/pg/v10/orm"
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"github.com/gotosocial/gotosocial/internal/config"
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"github.com/gotosocial/gotosocial/internal/model"
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"github.com/sirupsen/logrus"
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)
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type postgresService struct {
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config *config.DBConfig
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conn *pg.DB
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log *logrus.Entry
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cancel context.CancelFunc
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locks *sync.Map
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}
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// newPostgresService returns a postgresService derived from the provided config, which implements the go-fed DB interface.
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// Under the hood, it uses https://github.com/go-pg/pg to create and maintain a database connection.
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func newPostgresService(ctx context.Context, c *config.Config, log *logrus.Entry) (*postgresService, error) {
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opts, err := derivePGOptions(c)
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if err != nil {
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return nil, fmt.Errorf("could not create postgres service: %s", err)
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}
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log.Debugf("using pg options: %+v", opts)
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readyChan := make(chan interface{})
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opts.OnConnect = func(ctx context.Context, c *pg.Conn) error {
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close(readyChan)
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return nil
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}
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// create a connection
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pgCtx, cancel := context.WithCancel(ctx)
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conn := pg.Connect(opts).WithContext(pgCtx)
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// this will break the logfmt format we normally log in,
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// since we can't choose where pg outputs to and it defaults to
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// stdout. So use this option with care!
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if log.Logger.GetLevel() >= logrus.TraceLevel {
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conn.AddQueryHook(pgdebug.DebugHook{
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// Print all queries.
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Verbose: true,
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})
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}
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// actually *begin* the connection so that we can tell if the db is there
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// and listening, and also trigger the opts.OnConnect function passed in above
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if err := conn.Ping(ctx); err != nil {
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cancel()
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return nil, fmt.Errorf("db connection error: %s", err)
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}
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// print out discovered postgres version
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var version string
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if _, err = conn.QueryOneContext(ctx, pg.Scan(&version), "SELECT version()"); err != nil {
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cancel()
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return nil, fmt.Errorf("db connection error: %s", err)
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}
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log.Infof("connected to postgres version: %s", version)
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// make sure the opts.OnConnect function has been triggered
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// and closed the ready channel
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select {
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case <-readyChan:
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log.Infof("postgres connection ready")
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case <-time.After(5 * time.Second):
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cancel()
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return nil, errors.New("db connection timeout")
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}
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acc := model.StubAccount()
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if _, err := conn.Model(acc).Returning("id").Insert(); err != nil {
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cancel()
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return nil, fmt.Errorf("db insert error: %s", err)
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}
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log.Infof("created account with id %s", acc.ID)
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note := &model.Note{
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Visibility: &model.Visibility{
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Local: true,
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},
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CreatedAt: time.Now(),
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UpdatedAt: time.Now(),
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}
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if _, err := conn.WithContext(ctx).Model(note).Returning("id").Insert(); err != nil {
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cancel()
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return nil, fmt.Errorf("db insert error: %s", err)
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}
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log.Infof("created note with id %s", note.ID)
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// we can confidently return this useable postgres service now
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return &postgresService{
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config: c.DBConfig,
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conn: conn,
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log: log,
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cancel: cancel,
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locks: &sync.Map{},
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}, nil
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}
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/*
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HANDY STUFF
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*/
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// derivePGOptions takes an application config and returns either a ready-to-use *pg.Options
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// with sensible defaults, or an error if it's not satisfied by the provided config.
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func derivePGOptions(c *config.Config) (*pg.Options, error) {
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if strings.ToUpper(c.DBConfig.Type) != dbTypePostgres {
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return nil, fmt.Errorf("expected db type of %s but got %s", dbTypePostgres, c.DBConfig.Type)
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}
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// validate port
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if c.DBConfig.Port == 0 {
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return nil, errors.New("no port set")
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}
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// validate address
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if c.DBConfig.Address == "" {
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return nil, errors.New("no address set")
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}
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ipv4Regex := regexp.MustCompile(`^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$`)
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hostnameRegex := regexp.MustCompile(`^(?:[a-z0-9]+(?:-[a-z0-9]+)*\.)+[a-z]{2,}$`)
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if !hostnameRegex.MatchString(c.DBConfig.Address) && !ipv4Regex.MatchString(c.DBConfig.Address) && c.DBConfig.Address != "localhost" {
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return nil, fmt.Errorf("address %s was neither an ipv4 address nor a valid hostname", c.DBConfig.Address)
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}
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// validate username
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if c.DBConfig.User == "" {
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return nil, errors.New("no user set")
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}
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// validate that there's a password
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if c.DBConfig.Password == "" {
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return nil, errors.New("no password set")
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}
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// validate database
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if c.DBConfig.Database == "" {
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return nil, errors.New("no database set")
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}
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// We can rely on the pg library we're using to set
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// sensible defaults for everything we don't set here.
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options := &pg.Options{
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Addr: fmt.Sprintf("%s:%d", c.DBConfig.Address, c.DBConfig.Port),
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User: c.DBConfig.User,
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Password: c.DBConfig.Password,
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Database: c.DBConfig.Database,
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ApplicationName: c.ApplicationName,
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}
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return options, nil
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}
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/*
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GO-FED DB INTERFACE-IMPLEMENTING FUNCTIONS
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*/
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func (ps *postgresService) Lock(ctx context.Context, id *url.URL) error {
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// Before any other Database methods are called, the relevant `id`
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// entries are locked to allow for fine-grained concurrency.
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// Strategy: create a new lock, if stored, continue. Otherwise, lock the
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// existing mutex.
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mu := &sync.Mutex{}
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mu.Lock() // Optimistically lock if we do store it.
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i, loaded := ps.locks.LoadOrStore(id.String(), mu)
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if loaded {
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mu = i.(*sync.Mutex)
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mu.Lock()
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}
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return nil
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}
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func (ps *postgresService) Unlock(ctx context.Context, id *url.URL) error {
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// Once Go-Fed is done calling Database methods, the relevant `id`
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// entries are unlocked.
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i, ok := ps.locks.Load(id.String())
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if !ok {
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return errors.New("missing an id in unlock")
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}
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mu := i.(*sync.Mutex)
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mu.Unlock()
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return nil
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}
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func (ps *postgresService) InboxContains(ctx context.Context, inbox *url.URL, id *url.URL) (bool, error) {
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return false, nil
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}
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func (ps *postgresService) GetInbox(ctx context.Context, inboxIRI *url.URL) (inbox vocab.ActivityStreamsOrderedCollectionPage, err error) {
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return nil, nil
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}
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func (ps *postgresService) SetInbox(ctx context.Context, inbox vocab.ActivityStreamsOrderedCollectionPage) error {
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return nil
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}
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func (ps *postgresService) Owns(ctx context.Context, id *url.URL) (owns bool, err error) {
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return false, nil
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}
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func (ps *postgresService) ActorForOutbox(ctx context.Context, outboxIRI *url.URL) (actorIRI *url.URL, err error) {
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return nil, nil
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}
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func (ps *postgresService) ActorForInbox(ctx context.Context, inboxIRI *url.URL) (actorIRI *url.URL, err error) {
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return nil, nil
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}
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func (ps *postgresService) OutboxForInbox(ctx context.Context, inboxIRI *url.URL) (outboxIRI *url.URL, err error) {
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return nil, nil
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}
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func (ps *postgresService) Exists(ctx context.Context, id *url.URL) (exists bool, err error) {
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return false, nil
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}
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func (ps *postgresService) Get(ctx context.Context, id *url.URL) (value vocab.Type, err error) {
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return nil, nil
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}
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func (ps *postgresService) Create(ctx context.Context, asType vocab.Type) error {
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t, err := streams.NewTypeResolver()
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if err != nil {
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return err
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}
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if err := t.Resolve(ctx, asType); err != nil {
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return err
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}
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asType.GetTypeName()
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return nil
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}
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func (ps *postgresService) Update(ctx context.Context, asType vocab.Type) error {
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return nil
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}
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func (ps *postgresService) Delete(ctx context.Context, id *url.URL) error {
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return nil
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}
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func (ps *postgresService) GetOutbox(ctx context.Context, outboxIRI *url.URL) (inbox vocab.ActivityStreamsOrderedCollectionPage, err error) {
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return nil, nil
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}
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func (ps *postgresService) SetOutbox(ctx context.Context, outbox vocab.ActivityStreamsOrderedCollectionPage) error {
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return nil
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}
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func (ps *postgresService) NewID(ctx context.Context, t vocab.Type) (id *url.URL, err error) {
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return nil, nil
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}
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func (ps *postgresService) Followers(ctx context.Context, actorIRI *url.URL) (followers vocab.ActivityStreamsCollection, err error) {
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return nil, nil
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}
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func (ps *postgresService) Following(ctx context.Context, actorIRI *url.URL) (followers vocab.ActivityStreamsCollection, err error) {
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return nil, nil
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}
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func (ps *postgresService) Liked(ctx context.Context, actorIRI *url.URL) (followers vocab.ActivityStreamsCollection, err error) {
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return nil, nil
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}
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/*
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EXTRA FUNCTIONS
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*/
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func (ps *postgresService) Stop(ctx context.Context) error {
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ps.log.Info("closing db connection")
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if err := ps.conn.Close(); err != nil {
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// only cancel if there's a problem closing the db
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ps.cancel()
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return err
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}
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return nil
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}
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func (ps *postgresService) CreateSchema(ctx context.Context) error {
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models := []interface{}{
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(*model.Account)(nil),
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(*model.Note)(nil),
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}
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ps.log.Info("creating db schema")
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for _, model := range models {
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err := ps.conn.Model(model).CreateTable(&orm.CreateTableOptions{
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IfNotExists: true,
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})
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if err != nil {
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return err
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}
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}
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ps.log.Info("db schema created")
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return nil
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}
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func (ps *postgresService) IsHealthy(ctx context.Context) error {
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return ps.conn.Ping(ctx)
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}
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