485 lines
14 KiB
Go
485 lines
14 KiB
Go
// SPDX-FileCopyrightText: 2020 Luke Granger-Brown <depot@lukegb.com>
|
|
//
|
|
// SPDX-License-Identifier: Apache-2.0
|
|
package main
|
|
|
|
import (
|
|
"context"
|
|
"encoding/json"
|
|
"flag"
|
|
"fmt"
|
|
"io"
|
|
"io/ioutil"
|
|
"log"
|
|
"net/http"
|
|
"net/url"
|
|
"os"
|
|
"os/signal"
|
|
"path/filepath"
|
|
"strings"
|
|
"sync"
|
|
"time"
|
|
|
|
"github.com/dghubble/oauth1"
|
|
"github.com/jackc/pgtype"
|
|
"github.com/jackc/pgx/v4"
|
|
"github.com/jackc/pgx/v4/pgxpool"
|
|
)
|
|
|
|
var (
|
|
databaseURL = flag.String("database_url", "", "Database URL")
|
|
tickInterval = flag.Duration("tick_interval", 1*time.Minute, "Tick interval")
|
|
workerCount = flag.Int("workers", 20, "Workers to spawn for fetching info from Twitter API")
|
|
workAtOnce = flag.Int("work_at_once", 40, "Work to enqueue at once (i.e. we will only look for this much work to do).")
|
|
|
|
mediaFetchDestination = flag.String("media_fetch_destination", "/tmp", "Path to write fetched media to.")
|
|
)
|
|
|
|
type WorkerConfig struct {
|
|
Name string
|
|
|
|
TickInterval time.Duration
|
|
OAuthConfig *oauth1.Config
|
|
WorkAtOnce int
|
|
DatabasePool *pgxpool.Pool
|
|
|
|
WorkQueue chan func(context.Context)
|
|
}
|
|
|
|
type worker func(context.Context, WorkerConfig) error
|
|
|
|
type tweetVideoVariant struct {
|
|
Bitrate int `json:"bitrate"`
|
|
ContentType string `json:"content_type"`
|
|
URL string `json:"url"`
|
|
}
|
|
|
|
type tweetVideoInfo struct {
|
|
Variants []tweetVideoVariant `json:"variants"`
|
|
}
|
|
|
|
type tweetExtendedMedia struct {
|
|
ID int64 `json:"id"`
|
|
Type string `json:"type"`
|
|
MediaURLHTTPS string `json:"media_url_https"`
|
|
VideoInfo *tweetVideoInfo `json:"video_info"`
|
|
}
|
|
|
|
type tweetExtendedEntities struct {
|
|
Media []tweetExtendedMedia `json:"media"`
|
|
}
|
|
|
|
type tweetData struct {
|
|
ID int64 `json:"id"`
|
|
Text string `json:"full_text"`
|
|
QuotedStatus *tweetData `json:"quoted_status"`
|
|
RetweetedStatus *tweetData `json:"retweeted_status"`
|
|
InReplyToStatusID *int64 `json:"in_reply_to_status_id"`
|
|
ExtendedEntities tweetExtendedEntities `json:"extended_entities"`
|
|
|
|
Data json.RawMessage `json:"-"`
|
|
}
|
|
|
|
func mediaFetchOutputPath(u string) (string, error) {
|
|
p, err := url.Parse(u)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
path := strings.TrimLeft(p.Path, "/")
|
|
|
|
return filepath.Join(*mediaFetchDestination, p.Host, path), nil
|
|
}
|
|
|
|
type databaseQuerier interface {
|
|
Query(context.Context, string, ...interface{}) (pgx.Rows, error)
|
|
}
|
|
|
|
func fetchTweets(ctx context.Context, conn databaseQuerier, query string, args ...interface{}) ([]tweetData, error) {
|
|
rows, err := conn.Query(ctx, query, args...)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("querying: %w", err)
|
|
}
|
|
|
|
var tweets []tweetData
|
|
for rows.Next() {
|
|
var tweetJSON pgtype.JSONB
|
|
if err := rows.Scan(&tweetJSON); err != nil {
|
|
return nil, fmt.Errorf("scanning: %w", err)
|
|
}
|
|
|
|
var tweet tweetData
|
|
if err := json.Unmarshal(tweetJSON.Bytes, &tweet); err != nil {
|
|
return nil, fmt.Errorf("unmarshaling: %w", err)
|
|
}
|
|
tweets = append(tweets, tweet)
|
|
}
|
|
if rows.Err() != nil {
|
|
return nil, fmt.Errorf("retrieving: %w", err)
|
|
}
|
|
return tweets, nil
|
|
}
|
|
|
|
func mediaFetchTick(ctx context.Context, cfg WorkerConfig) error {
|
|
tweets, err := fetchTweets(ctx, cfg.DatabasePool, "SELECT object FROM tweets WHERE NOT fetched_media LIMIT $1", cfg.WorkAtOnce)
|
|
if err != nil {
|
|
return fmt.Errorf("fetching unfetched media tweet IDs: %w", err)
|
|
}
|
|
var ids []int64
|
|
for _, t := range tweets {
|
|
ids = append(ids, t.ID)
|
|
}
|
|
log.Printf("[%v] Got %d tweets (%v)", cfg.Name, len(tweets), ids)
|
|
|
|
var wg sync.WaitGroup
|
|
wg.Add(len(tweets))
|
|
for _, t := range tweets {
|
|
t := t
|
|
cfg.WorkQueue <- func(ctx context.Context) {
|
|
defer wg.Done()
|
|
|
|
// Abbreviated message for tweets with no media, which is the majority of them.
|
|
if len(t.ExtendedEntities.Media) == 0 {
|
|
if _, err := cfg.DatabasePool.Exec(ctx, "UPDATE tweets SET fetched_media=true WHERE id=$1", t.ID); err != nil {
|
|
log.Printf("[%v:%d] Failed to update tweets table: %v", cfg.Name, t.ID, err)
|
|
}
|
|
log.Printf("[%v:%d] No media", cfg.Name, t.ID)
|
|
return
|
|
}
|
|
|
|
log.Printf("[%v:%d] Starting work", cfg.Name, t.ID)
|
|
defer log.Printf("[%v:%d] Done with work", cfg.Name, t.ID)
|
|
|
|
var mediaURLs []string
|
|
for _, m := range t.ExtendedEntities.Media {
|
|
if m.MediaURLHTTPS != "" {
|
|
mediaURLs = append(mediaURLs, m.MediaURLHTTPS)
|
|
}
|
|
if m.VideoInfo != nil {
|
|
bestBitrate := -1
|
|
var bestURL string
|
|
for _, v := range m.VideoInfo.Variants {
|
|
if v.ContentType == "application/x-mpegURL" {
|
|
// m3u8 isn't very interesting since we'd have to parse it to get a playlist.
|
|
continue
|
|
}
|
|
if v.Bitrate > bestBitrate {
|
|
bestBitrate = v.Bitrate
|
|
bestURL = v.URL
|
|
}
|
|
}
|
|
if bestURL != "" {
|
|
mediaURLs = append(mediaURLs, bestURL)
|
|
}
|
|
}
|
|
}
|
|
|
|
log.Printf("[%v:%d] %d media URLs to fetch: %v", cfg.Name, t.ID, len(mediaURLs), mediaURLs)
|
|
for _, u := range mediaURLs {
|
|
out, err := mediaFetchOutputPath(u)
|
|
if err != nil {
|
|
log.Printf("[%v:%d:%v] fetching output path: %v", cfg.Name, t.ID, u, err)
|
|
return
|
|
}
|
|
|
|
// Fetch u -> out
|
|
if fi, err := os.Stat(out); err == nil {
|
|
// File already exists, does it have non-zero size?
|
|
if fi.Size() > 0 {
|
|
// It does!
|
|
log.Printf("[%v:%d:%v] %v already exists; skipping", cfg.Name, t.ID, u, out)
|
|
continue
|
|
}
|
|
log.Printf("[%v:%d:%v] %v already exists but has zero size; refetching", cfg.Name, t.ID, u, out)
|
|
} else if !os.IsNotExist(err) {
|
|
log.Printf("[%v:%d:%v] checking output path %v: %v", cfg.Name, t.ID, u, out, err)
|
|
return
|
|
}
|
|
|
|
if err := os.MkdirAll(filepath.Dir(out), 0755); err != nil {
|
|
log.Printf("[%v:%d:%v] creating output path %v: %v", cfg.Name, t.ID, u, out, err)
|
|
return
|
|
}
|
|
|
|
if err := func() error {
|
|
resp, err := http.Get(u)
|
|
if err != nil {
|
|
return fmt.Errorf("http.Get: %w", err)
|
|
}
|
|
defer resp.Body.Close()
|
|
|
|
switch resp.StatusCode {
|
|
case http.StatusOK:
|
|
break // This is what we expect.
|
|
case http.StatusNotFound:
|
|
log.Printf("[%v:%d:%v] got a 404; marking as successful since this has probably been deleted.", cfg.Name, t.ID, u)
|
|
return nil
|
|
default:
|
|
return fmt.Errorf("HTTP status %d - %v", resp.StatusCode, resp.Status)
|
|
}
|
|
|
|
f, err := os.Create(out)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
defer f.Close()
|
|
|
|
written, err := io.Copy(f, resp.Body)
|
|
if err != nil {
|
|
// Try to delete the file we created to force a refetch next time.
|
|
_ = f.Truncate(0) // Ignore the error, though.
|
|
return fmt.Errorf("IO error: %w", err)
|
|
}
|
|
log.Printf("[%v:%d:%v] downloaded %d bytes.", cfg.Name, t.ID, u, written)
|
|
|
|
return nil
|
|
}(); err != nil {
|
|
log.Printf("[%v:%d:%v] %v", cfg.Name, t.ID, u, err)
|
|
return
|
|
}
|
|
}
|
|
log.Printf("[%v:%d] Done downloading media, marking as complete.", cfg.Name, t.ID)
|
|
|
|
if _, err := cfg.DatabasePool.Exec(ctx, "UPDATE tweets SET fetched_media=true WHERE id=$1", t.ID); err != nil {
|
|
log.Printf("[%v:%d] Failed to update tweets table: %v", cfg.Name, t.ID, err)
|
|
}
|
|
}
|
|
}
|
|
wg.Wait()
|
|
log.Printf("[%v] Done with work.", cfg.Name)
|
|
|
|
return nil
|
|
}
|
|
|
|
func relatedFetchTick(ctx context.Context, cfg WorkerConfig) error {
|
|
tweets, err := fetchTweets(ctx, cfg.DatabasePool, "SELECT object FROM tweets WHERE NOT fetched_related_tweets LIMIT $1", cfg.WorkAtOnce)
|
|
if err != nil {
|
|
return fmt.Errorf("fetching unfetched related tweet IDs: %w", err)
|
|
}
|
|
var ids []int64
|
|
for _, t := range tweets {
|
|
ids = append(ids, t.ID)
|
|
}
|
|
log.Printf("[%v] Got %d tweets (%v)", cfg.Name, len(tweets), ids)
|
|
|
|
var wg sync.WaitGroup
|
|
for _, t := range tweets {
|
|
var tweetIDsToFetch []int64
|
|
if t.QuotedStatus != nil {
|
|
tweetIDsToFetch = append(tweetIDsToFetch, t.QuotedStatus.ID)
|
|
}
|
|
if t.RetweetedStatus != nil {
|
|
tweetIDsToFetch = append(tweetIDsToFetch, t.RetweetedStatus.ID)
|
|
}
|
|
if t.InReplyToStatusID != nil {
|
|
tweetIDsToFetch = append(tweetIDsToFetch, *t.InReplyToStatusID)
|
|
}
|
|
|
|
log.Printf("[%v:%d] Got %d tweets to fetch (%v)", cfg.Name, t.ID, len(tweetIDsToFetch), tweetIDsToFetch)
|
|
if len(tweetIDsToFetch) == 0 {
|
|
if _, err := cfg.DatabasePool.Exec(ctx, "UPDATE tweets SET fetched_related_tweets=true WHERE id=$1", t.ID); err != nil {
|
|
log.Printf("[%v:%d] Updating tweet to mark as completed: %v", cfg.Name, t.ID, err)
|
|
} else {
|
|
log.Printf("[%v:%d] Successfully marked as done (no tweets to fetch).", cfg.Name, t.ID)
|
|
}
|
|
continue
|
|
}
|
|
|
|
wg.Add(1)
|
|
t := t
|
|
cfg.WorkQueue <- func(ctx context.Context) {
|
|
defer wg.Done()
|
|
|
|
// Fetch user credentials for this.
|
|
// TODO(lukegb): maybe this needs to be smarter (e.g. for protected accounts?), but for now we just pick someone who could see the original tweet.
|
|
var accessToken, accessSecret string
|
|
if err := cfg.DatabasePool.QueryRow(ctx, "SELECT ua.access_token, ua.access_secret FROM user_accounts ua INNER JOIN user_accounts_tweets uat ON uat.userid=ua.userid WHERE uat.tweetid=$1 LIMIT 1", t.ID).Scan(&accessToken, &accessSecret); err != nil {
|
|
log.Printf("[%v:%d] Retrieving OAuth user credentials: %v", cfg.Name, t.ID, err)
|
|
return
|
|
}
|
|
httpClient := cfg.OAuthConfig.Client(ctx, oauth1.NewToken(accessToken, accessSecret))
|
|
|
|
for _, tid := range tweetIDsToFetch {
|
|
// Check if we already have tid.
|
|
log.Printf("[%v:%d] Fetching %d", cfg.Name, t.ID, tid)
|
|
|
|
var cnt int
|
|
if err := cfg.DatabasePool.QueryRow(ctx, "SELECT COUNT(1) FROM tweets WHERE id=$1", tid).Scan(&cnt); err != nil {
|
|
log.Printf("[%v:%d:%d] Existence check failed: %v", cfg.Name, t.ID, tid, err)
|
|
return
|
|
}
|
|
if cnt > 0 {
|
|
log.Printf("[%v:%d] Already have %d", cfg.Name, t.ID, tid)
|
|
continue
|
|
}
|
|
|
|
// We don't have it already; let's fetch it from ze Twitterz.
|
|
req, err := http.NewRequest("GET", fmt.Sprintf("https://api.twitter.com/1.1/statuses/show.json?id=%d&include_entities=true&include_ext_alt_text=true", tid), nil)
|
|
if err != nil {
|
|
log.Printf("[%v:%d:%d] Constructing GET request: %v", cfg.Name, t.ID, tid, err)
|
|
return
|
|
}
|
|
resp, err := httpClient.Do(req.WithContext(ctx))
|
|
if err != nil {
|
|
log.Printf("[%v:%d:%d] Executing GET request: %v", cfg.Name, t.ID, tid, err)
|
|
return
|
|
}
|
|
defer resp.Body.Close()
|
|
switch resp.StatusCode {
|
|
case http.StatusOK:
|
|
// Expected.
|
|
break
|
|
case http.StatusNotFound:
|
|
// Tweet has probably been deleted, or is otherwise ACLed.
|
|
log.Printf("[%v:%d:%d] Not found response; assuming that it's been deleted and treating as a success.", cfg.Name, t.ID, tid)
|
|
continue
|
|
default:
|
|
log.Printf("[%v:%d:%d] GET statuses/show.json returned %d - %v", cfg.Name, t.ID, tid, resp.StatusCode, resp.Status)
|
|
return
|
|
}
|
|
|
|
tweetBytes, err := ioutil.ReadAll(resp.Body)
|
|
if err != nil {
|
|
log.Printf("[%v:%d:%d] ReadAll: %v", cfg.Name, t.ID, tid, err)
|
|
return
|
|
}
|
|
var subtweet tweetData
|
|
if err := json.Unmarshal(tweetBytes, &subtweet); err != nil {
|
|
log.Printf("[%v:%d:%d] Decoding tweet as JSON: %v", cfg.Name, t.ID, tid, err)
|
|
return
|
|
}
|
|
|
|
// Insert it into the database.
|
|
if _, err := cfg.DatabasePool.Exec(ctx, "INSERT INTO tweets (id, text, object) VALUES ($1, $2, $3) ON CONFLICT DO NOTHING", subtweet.ID, subtweet.Text, tweetBytes); err != nil {
|
|
log.Printf("[%v:%d:%d] Inserting tweet into database: %v", cfg.Name, t.ID, tid, err)
|
|
return
|
|
}
|
|
|
|
// Insert the ACLs.
|
|
if _, err := cfg.DatabasePool.Exec(ctx, "INSERT INTO user_accounts_tweets SELECT userid, $1 tweetid, false on_timeline FROM user_accounts_tweets WHERE tweetid=$2 ON CONFLICT DO NOTHING", tid, t.ID); err != nil {
|
|
log.Printf("[%v:%d:%d] Inserting ACLs into table failed: %v", cfg.Name, t.ID, tid, err)
|
|
return
|
|
}
|
|
}
|
|
|
|
// We have fetched all the subtweets, mark the tweet as complete.
|
|
if _, err := cfg.DatabasePool.Exec(ctx, "UPDATE tweets SET fetched_related_tweets=true WHERE id=$1", t.ID); err != nil {
|
|
log.Printf("[%v:%d] Updating tweet to mark as completed: %v", cfg.Name, t.ID, err)
|
|
} else {
|
|
log.Printf("[%v:%d] Successfully processed.", cfg.Name, t.ID)
|
|
}
|
|
}
|
|
}
|
|
wg.Wait()
|
|
log.Printf("[%v] Done with work.", cfg.Name)
|
|
|
|
return nil
|
|
}
|
|
|
|
func tickToWorker(w worker) worker {
|
|
return func(ctx context.Context, cfg WorkerConfig) error {
|
|
log.Printf("[%v] Performing initial tick.", cfg.Name)
|
|
if err := w(ctx, cfg); err != nil {
|
|
log.Printf("[%v] Initial tick failed: %v", cfg.Name, err)
|
|
}
|
|
t := time.NewTicker(cfg.TickInterval)
|
|
defer t.Stop()
|
|
for {
|
|
select {
|
|
case <-ctx.Done():
|
|
return nil
|
|
case <-t.C:
|
|
log.Printf("[%v] Tick...", cfg.Name)
|
|
if err := w(ctx, cfg); err != nil {
|
|
log.Printf("[%v] Tick failed: %v", cfg.Name, err)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
var (
|
|
mediaFetchWorker = tickToWorker(mediaFetchTick)
|
|
relatedFetchWorker = tickToWorker(relatedFetchTick)
|
|
)
|
|
|
|
func main() {
|
|
flag.Parse()
|
|
|
|
ctx := context.Background()
|
|
|
|
conn, err := pgxpool.Connect(ctx, *databaseURL)
|
|
if err != nil {
|
|
fmt.Fprintf(os.Stderr, "Unable to connect to database: %v\n", err)
|
|
os.Exit(1)
|
|
}
|
|
defer conn.Close()
|
|
|
|
ckey, csecret := os.Getenv("TWITTER_OAUTH_CONSUMER_KEY"), os.Getenv("TWITTER_OAUTH_CONSUMER_SECRET")
|
|
if ckey == "" || csecret == "" {
|
|
fmt.Fprintf(os.Stderr, "No TWITTER_OAUTH_CONSUMER_KEY or TWITTER_OAUTH_CONSUMER_SECRET\n")
|
|
os.Exit(1)
|
|
}
|
|
twitterOAuthConfig := oauth1.NewConfig(ckey, csecret)
|
|
|
|
stop := func() <-chan struct{} {
|
|
st := make(chan os.Signal)
|
|
signal.Notify(st, os.Interrupt)
|
|
stopCh := make(chan struct{})
|
|
go func() {
|
|
<-st
|
|
log.Printf("Shutting down")
|
|
close(stopCh)
|
|
signal.Reset(os.Interrupt)
|
|
}()
|
|
return stopCh
|
|
}()
|
|
cctx, cancel := context.WithCancel(ctx)
|
|
var wg sync.WaitGroup
|
|
|
|
workQueue := make(chan func(context.Context))
|
|
wg.Add(*workerCount)
|
|
for n := 0; n < *workerCount; n++ {
|
|
go func() {
|
|
ctx := cctx
|
|
defer wg.Done()
|
|
for {
|
|
select {
|
|
case <-ctx.Done():
|
|
return
|
|
case f := <-workQueue:
|
|
f(ctx)
|
|
}
|
|
}
|
|
}()
|
|
}
|
|
|
|
workers := map[string]worker{
|
|
"mediaFetchWorker": mediaFetchWorker,
|
|
"relatedFetchWorker": relatedFetchWorker,
|
|
}
|
|
wg.Add(len(workers))
|
|
cfg := WorkerConfig{
|
|
TickInterval: *tickInterval,
|
|
OAuthConfig: twitterOAuthConfig,
|
|
WorkAtOnce: *workAtOnce,
|
|
|
|
DatabasePool: conn,
|
|
WorkQueue: workQueue,
|
|
}
|
|
for wn, w := range workers {
|
|
wn, w, cfg := wn, w, cfg
|
|
cfg.Name = wn
|
|
go func() {
|
|
defer wg.Done()
|
|
log.Printf("Starting worker %v.", wn)
|
|
if err := w(cctx, cfg); err != nil {
|
|
log.Printf("[%v] %v", wn, err)
|
|
}
|
|
}()
|
|
}
|
|
|
|
<-stop
|
|
log.Printf("Got stop signal. Shutting down...")
|
|
cancel()
|
|
wg.Wait()
|
|
}
|