diff --git a/go/twitterchiver/archiver/Dockerfile b/go/twitterchiver/archiver/Dockerfile new file mode 100644 index 0000000000..d713a57269 --- /dev/null +++ b/go/twitterchiver/archiver/Dockerfile @@ -0,0 +1,16 @@ +FROM golang:1.13-buster as build + +RUN mkdir /go/src/app +WORKDIR /go/src/app +ADD go.mod go.sum /go/src/app + +RUN go get -d -v ./... + +ADD archiver /go/src/app/archiver + +RUN go build -o /go/bin/app ./archiver + +# Now copy it into our base image. +FROM gcr.io/distroless/base-debian10 +COPY --from=build /go/bin/app / +CMD ["/app"] diff --git a/go/twitterchiver/archiver/archiver.go b/go/twitterchiver/archiver/archiver.go new file mode 100644 index 0000000000..70f26f8aef --- /dev/null +++ b/go/twitterchiver/archiver/archiver.go @@ -0,0 +1,257 @@ +package main + +import ( + "context" + "encoding/json" + "flag" + "fmt" + "log" + "net/http" + "os" + "os/signal" + "sync" + "time" + + "github.com/dghubble/oauth1" + "github.com/jackc/pgx/v4" +) + +var ( + databaseURL = flag.String("database_url", "", "Database URL") + tickInterval = flag.Duration("tick_interval", 1*time.Minute, "Tick interval") + workers = flag.Int("twitter_workers", 5, "Workers to spawn for fetching info from Twitter API") +) + +type user struct { + UserID int64 + Username string + AccessToken, AccessSecret string + LatestTweet int64 +} + +func userAccounts(ctx context.Context, conn *pgx.Conn) ([]user, error) { + rows, err := conn.Query(ctx, "SELECT userid, username, access_token, access_secret, latest_tweet FROM user_accounts") + if err != nil { + return nil, fmt.Errorf("retrieving user accounts: %w", err) + } + defer rows.Close() + + var users []user + for rows.Next() { + var u user + err = rows.Scan(&u.UserID, &u.Username, &u.AccessToken, &u.AccessSecret, &u.LatestTweet) + if err != nil { + return nil, fmt.Errorf("scanning user account: %w", err) + } + users = append(users, u) + } + + if rows.Err() != nil { + return nil, fmt.Errorf("fetching user accounts: %w", rows.Err()) + } + + return users, nil +} + +type tweet struct { + ID int64 `json:"id"` + Text string `json:"full_text"` + + Data json.RawMessage `json:"-"` +} + +func insertTweet(ctx context.Context, conn *pgx.Conn, tw tweet) error { + _, err := conn.Exec(ctx, "INSERT INTO tweets (id, text, object) VALUES ($1, $2, $3) ON CONFLICT DO NOTHING", tw.ID, tw.Text, tw.Data) + return err +} + +func fetchTweets(ctx context.Context, twitterOAuthConfig *oauth1.Config, user user) ([]tweet, error) { + log.Printf("Fetching tweets for %s (%d)", user.Username, user.UserID) + + httpClient := twitterOAuthConfig.Client(ctx, oauth1.NewToken(user.AccessToken, user.AccessSecret)) + + req, err := http.NewRequest("GET", "https://api.twitter.com/1.1/statuses/home_timeline.json?count=200&include_entities=true&exclude_replies=false&tweet_mode=extended", nil) + if err != nil { + return nil, fmt.Errorf("constructing request to Twitter API: %w", err) + } + req = req.WithContext(ctx) + q := req.URL.Query() + if user.LatestTweet != 0 { + q.Set("since_id", fmt.Sprintf("%d", user.LatestTweet)) + } + req.URL.RawQuery = q.Encode() + resp, err := httpClient.Do(req) + if err != nil { + return nil, fmt.Errorf("querying Twitter API: %w", err) + } + defer resp.Body.Close() + if resp.StatusCode != http.StatusOK { + return nil, fmt.Errorf("Twitter API returned status %s", resp.Status) + } + + var tweetsRaw []json.RawMessage + if err := json.NewDecoder(resp.Body).Decode(&tweetsRaw); err != nil { + return nil, fmt.Errorf("decoding JSON from Twitter API: %w", err) + } + + tweets := make([]tweet, 0, len(tweetsRaw)) + for _, tweetRaw := range tweetsRaw { + var tw tweet + if err := json.Unmarshal([]byte(tweetRaw), &tw); err != nil { + return nil, fmt.Errorf("decoding tweet: %w\n%v", err, string(tweetRaw)) + } + tw.Data = tweetRaw + tweets = append(tweets, tw) + } + return tweets, nil +} + +type userResult struct { + UserID int64 + TweetID int64 +} + +func updateUser(ctx context.Context, conn *pgx.Conn, ur userResult) error { + _, err := conn.Exec(ctx, "UPDATE user_accounts SET latest_tweet=$1 WHERE userid=$2", ur.TweetID, ur.UserID) + return err +} + +func tick(ctx context.Context, conn *pgx.Conn, twitterOAuthConfig *oauth1.Config) error { + users, err := userAccounts(ctx, conn) + if err != nil { + return err + } + + userCh := make(chan user) + resultCh := make(chan tweet) + userResultCh := make(chan userResult) + + wCnt := *workers + if wCnt > len(users) { + wCnt = len(users) + } + var wg sync.WaitGroup + wg.Add(wCnt) + go func() { + wg.Wait() + close(resultCh) + close(userResultCh) + }() + for n := 0; n < wCnt; n++ { + go func() { + defer wg.Done() + + var largestTweetID int64 + var tweetCount int + for user := range userCh { + tweets, err := fetchTweets(ctx, twitterOAuthConfig, user) + if err != nil { + log.Printf("failed to fetch tweets for %v: %v", user.Username, err) + continue + } + for _, tw := range tweets { + tweetCount++ + resultCh <- tw + if tw.ID > largestTweetID { + largestTweetID = tw.ID + } + } + log.Printf("ingested tweets for %v (%d tweets, largest ID %d)", user.Username, tweetCount, largestTweetID) + if largestTweetID != 0 { + userResultCh <- userResult{ + UserID: user.UserID, + TweetID: largestTweetID, + } + } + } + }() + } + go func() { + defer close(userCh) + for _, user := range users { + userCh <- user + } + }() + + func() { + resultCh, userResultCh := resultCh, userResultCh + for { + if resultCh == nil && userResultCh == nil { + return + } + + select { + case tw, ok := <-resultCh: + if !ok { + resultCh = nil + continue + } + if err := insertTweet(ctx, conn, tw); err != nil { + log.Printf("Failed to insert tweet %d: %v\n%v", tw.ID, err, tw.Data) + } + case userResult, ok := <-userResultCh: + if !ok { + userResultCh = nil + continue + } + if err := updateUser(ctx, conn, userResult); err != nil { + log.Printf("Failed to update user %d: %v", userResult.UserID, err) + } + } + } + }() + + return nil +} + +func main() { + flag.Parse() + + ctx := context.Background() + + conn, err := pgx.Connect(ctx, *databaseURL) + if err != nil { + fmt.Fprintf(os.Stderr, "Unable to connect to database: %v\n", err) + os.Exit(1) + } + defer conn.Close(ctx) + + 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 + }() + + log.Printf("Started up.") + log.Printf("Doing initial fetch.") + if err := tick(ctx, conn, twitterOAuthConfig); err != nil { + log.Printf("tick failed: %v", err) + } + t := time.NewTicker(*tickInterval) +loop: + for { + select { + case <-t.C: + log.Printf("Tick...") + if err := tick(ctx, conn, twitterOAuthConfig); err != nil { + log.Printf("tick failed: %v", err) + } + case <-stop: + break loop + } + } +} diff --git a/go/twitterchiver/archiver/schema.sql b/go/twitterchiver/archiver/schema.sql new file mode 100644 index 0000000000..43e0f78e3b --- /dev/null +++ b/go/twitterchiver/archiver/schema.sql @@ -0,0 +1,13 @@ +CREATE TABLE tweets ( + id BIGINT NOT NULL, + text TEXT NOT NULL, + object JSONB NOT NULL +); + +CREATE TABLE user_accounts ( + username TEXT NOT NULL PRIMARY KEY, + userid BIGINT NOT NULL, + access_token TEXT NOT NULL, + access_secret TEXT NOT NULL, + latest_tweet BIGINT NOT NULL +); diff --git a/go/twitterchiver/go.mod b/go/twitterchiver/go.mod new file mode 100644 index 0000000000..af962fe27c --- /dev/null +++ b/go/twitterchiver/go.mod @@ -0,0 +1,8 @@ +module github.com/lukegb/twitterchiver + +go 1.14 + +require ( + github.com/dghubble/oauth1 v0.6.0 + github.com/jackc/pgx/v4 v4.8.1 +) diff --git 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