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main.go
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main.go
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package main
import (
"context"
"crypto/rand"
"fmt"
"log"
"log/slog"
"net"
"os"
"os/signal"
"path/filepath"
"strings"
"sync"
"syscall"
"time"
"net/http"
_ "net/http/pprof"
"github.com/bluesky-social/indigo/api/atproto"
comatproto "github.com/bluesky-social/indigo/api/atproto"
"github.com/bluesky-social/indigo/api/bsky"
"github.com/bluesky-social/indigo/carstore"
"github.com/bluesky-social/indigo/did"
"github.com/bluesky-social/indigo/events"
"github.com/bluesky-social/indigo/indexer"
"github.com/bluesky-social/indigo/models"
"github.com/bluesky-social/indigo/plc"
petname "github.com/dustinkirkland/golang-petname"
"github.com/icrowley/fake"
"github.com/labstack/echo-contrib/pprof"
"github.com/urfave/cli/v2"
godid "github.com/whyrusleeping/go-did"
"golang.org/x/crypto/acme/autocert"
"golang.org/x/time/rate"
lexutil "github.com/bluesky-social/indigo/lex/util"
"github.com/bluesky-social/indigo/repomgr"
"github.com/bluesky-social/indigo/util"
"github.com/gorilla/websocket"
"github.com/labstack/echo/v4"
"github.com/labstack/echo/v4/middleware"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promauto"
"github.com/prometheus/client_golang/prometheus/promhttp"
_ "go.uber.org/automaxprocs"
"gorm.io/driver/sqlite"
"gorm.io/gorm"
"github.com/carlmjohnson/versioninfo"
cbg "github.com/whyrusleeping/cbor-gen"
)
var eventsGeneratedCounter = promauto.NewCounter(prometheus.CounterOpts{
Name: "supercollider_events_generated_total",
Help: "The total number of events generated",
})
var eventsSentCounter = promauto.NewCounter(prometheus.CounterOpts{
Name: "supercollider_events_sent_total",
Help: "The total number of events sent",
})
type Server struct {
Events *events.EventManager
Dids []string
Host string
EnableSSL bool
Logger *slog.Logger
EventControl chan string
MultibaseKey string
RepoManager *repomgr.RepoManager
// Event Loop Parameters
TotalDesiredEvents int
MaxEventsPerSecond int
PlaybackFile string
}
func main() {
ctx := context.Background()
ctx, cancel := context.WithCancel(ctx)
defer cancel()
app := cli.App{
Name: "supercollider",
Usage: "atproto event noise-maker for Relay load testing",
Version: versioninfo.Short(),
}
app.Flags = []cli.Flag{
&cli.StringFlag{
Name: "hostname",
Usage: "hostname of this server (forward *.hostname DNS records to this server)",
Value: "supercollider.jazco.io",
EnvVars: []string{"SUPERCOLLIDER_HOST"},
},
&cli.BoolFlag{
Name: "use-ssl",
Usage: "listen on port 443 and use SSL (needs to be run as root and have external DNS setup)",
Value: false,
EnvVars: []string{"SUPERCOLLIDER_USE_SSL"},
},
&cli.IntFlag{
Name: "port",
Usage: "port for the HTTP(S) server to listen on (defaults to 80 if not using SSL, 443 if using SSL)",
EnvVars: []string{"SUPERCOLLIDER_PORT"},
},
&cli.StringFlag{
Name: "key-file",
Usage: "file to store the private key used to sign events",
Value: "key.raw",
EnvVars: []string{"KEY_FILE"},
},
}
app.Commands = []*cli.Command{
{
Name: "reload",
Usage: "reload events from a file and write them to an output file",
Action: Reload,
Flags: append([]cli.Flag{
&cli.IntFlag{
Name: "num-users",
Usage: "number of fake users to produce events for",
Value: 100,
EnvVars: []string{"NUM_USERS"},
},
&cli.IntFlag{
Name: "total-events",
Usage: "total number of events to generate",
Value: 1_000_000,
EnvVars: []string{"TOTAL_EVENTS"},
},
&cli.StringFlag{
Name: "output-file",
Usage: "output file for the generated events",
Value: "events_out.cbor",
EnvVars: []string{"OUTPUT_FILE"},
},
}, app.Flags...),
},
{
Name: "fire",
Usage: "fire events from a file over a websocket",
Action: Fire,
Flags: append([]cli.Flag{
&cli.IntFlag{
Name: "events-per-second",
Usage: "maximum number of events to generate per second",
Value: 300,
EnvVars: []string{"EVENTS_PER_SECOND"},
},
&cli.StringFlag{
Name: "input-file",
Usage: "input file for the generated events (if set, will read events from this file instead of generating them)",
Value: "events_in.cbor",
EnvVars: []string{"INPUT_FILE"},
},
}, app.Flags...),
},
}
err := app.Run(os.Args)
if err != nil {
log.Fatal(err)
}
}
func Reload(cctx *cli.Context) error {
ctx := cctx.Context
ctx, cancel := context.WithCancel(ctx)
defer cancel()
// Trap SIGINT to trigger a shutdown.
signals := make(chan os.Signal, 1)
signal.Notify(signals, syscall.SIGINT, syscall.SIGTERM)
go func() {
select {
case <-signals:
cancel()
fmt.Println("shutting down on signal")
// Give the server some time to shutdown gracefully, then exit.
time.Sleep(time.Second * 5)
os.Exit(0)
case <-ctx.Done():
fmt.Println("shutting down on context done")
}
}()
logger := slog.New(slog.NewJSONHandler(os.Stdout, &slog.HandlerOptions{
Level: slog.LevelInfo,
}))
defer func() {
logger.Info("main function teardown")
}()
logger = logger.With("source", "supercollider_main")
logger.Info("Starting Supercollider in Reload Mode")
logger.Info(fmt.Sprintf("Generating %d total events and writing them to %s",
cctx.Int("total-events"), cctx.String("output-file")))
em := events.NewEventManager(events.NewYoloPersister())
// Try to read the key from disk
keyBytes, err := os.ReadFile(cctx.String("key-file"))
if err != nil {
logger.Warn("failed to read key from disk, creating new key", "err", err.Error())
}
var privkey *godid.PrivKey
if len(keyBytes) == 0 {
privkey, err = godid.GeneratePrivKey(rand.Reader, godid.KeyTypeSecp256k1)
if err != nil {
log.Fatalf("failed to generate privkey: %+v\n", err)
}
rawKey, err := privkey.RawBytes()
if err != nil {
log.Fatalf("failed to serialize privkey: %+v\n", err)
}
err = os.WriteFile(cctx.String("key-file"), rawKey, 0644)
if err != nil {
log.Fatalf("failed to write privkey to disk: %+v\n", err)
}
} else {
privkey, err = godid.PrivKeyFromRawBytes(godid.KeyTypeSecp256k1, keyBytes)
if err != nil {
log.Fatalf("failed to parse privkey from disk: %+v\n", err)
}
}
// Configure the repomanager and keypair for our fake accounts
repoman, privkey, err := initSpeedyRepoMan(privkey)
if err != nil {
log.Fatalf("failed to init repo manager: %+v\n", err)
}
vMethod, err := godid.VerificationMethodFromKey(privkey.Public())
if err != nil {
log.Fatalf("failed to generate verification method: %+v\n", err)
}
// Initialize fake account DIDs
dids := []string{}
for i := 0; i < cctx.Int("num-users"); i++ {
did := fmt.Sprintf("did:web:%s.%s", petname.Generate(4, "-"), cctx.String("hostname"))
dids = append(dids, did)
}
// Instantiate Server
s := &Server{
Logger: logger,
EnableSSL: cctx.Bool("use-ssl"),
Host: cctx.String("hostname"),
RepoManager: repoman,
MultibaseKey: *vMethod.PublicKeyMultibase,
Dids: dids,
Events: em,
TotalDesiredEvents: cctx.Int("total-events"),
}
repoman.SetEventHandler(s.HandleRepoEvent, false)
// HTTP Server setup and Middleware Plumbing
e := echo.New()
e.AutoTLSManager.Cache = autocert.DirCache("/var/www/.cache")
pprof.Register(e)
e.Use(middleware.LoggerWithConfig(middleware.LoggerConfig{
Format: "method=${method}, ip=${remote_ip}, uri=${uri}, status=${status} latency=${latency_human} (ua=${user_agent})\n",
}))
e.GET("/", func(c echo.Context) error {
return c.HTML(http.StatusOK, `<h1>Supercollider is reloading...</h1>`)
})
e.GET("/metrics", echo.WrapHandler(promhttp.Handler()))
port := cctx.Int("port")
if port == 0 {
if cctx.Bool("use-ssl") {
port = 443
} else {
port = 80
}
}
wg := sync.WaitGroup{}
wg.Add(1)
// Start a loop to subscribe to events and write them to a file
go func() {
defer wg.Done()
outFile := cctx.String("output-file")
f, err := os.OpenFile(outFile, os.O_CREATE|os.O_WRONLY, 0644)
if err != nil {
log.Fatalf("failed to open output file: %+v\n", err)
}
defer f.Close()
since := int64(0)
evts, cancel, err := s.Events.Subscribe(ctx, "supercollider_file", func(evt *events.XRPCStreamEvent) bool {
return true
}, &since)
if err != nil {
log.Fatalf("failed to subscribe to events: %+v\n", err)
}
defer cancel()
logger.Info("writing events", "path", outFile)
header := events.EventHeader{Op: events.EvtKindMessage}
for {
select {
case <-ctx.Done():
logger.Info("shutting down file writer")
err = f.Sync()
if err != nil {
logger.Error("failed to sync file", "err", err)
}
logger.Info("file writer shutdown complete")
return
case evt := <-evts:
if evt.Error != nil {
logger.Error("error in event stream", "err", evt.Error)
continue
}
var obj lexutil.CBOR
switch {
case evt.Error != nil:
header.Op = events.EvtKindErrorFrame
obj = evt.Error
case evt.RepoCommit != nil:
header.MsgType = "#commit"
obj = evt.RepoCommit
case evt.RepoHandle != nil:
header.MsgType = "#handle"
obj = evt.RepoHandle
case evt.RepoInfo != nil:
header.MsgType = "#info"
obj = evt.RepoInfo
case evt.RepoMigrate != nil:
header.MsgType = "#migrate"
obj = evt.RepoMigrate
case evt.RepoTombstone != nil:
header.MsgType = "#tombstone"
obj = evt.RepoTombstone
default:
logger.Error("unrecognized event kind")
continue
}
if err := header.MarshalCBOR(f); err != nil {
logger.Error("failed to write header", "err", err)
}
if err := obj.MarshalCBOR(f); err != nil {
logger.Error("failed to write event", "err", err)
}
}
}
}()
// Start the event generation loop
go func() {
time.Sleep(time.Second * 5)
s.EventGenerationLoop(ctx, cancel)
}()
listenAddress := fmt.Sprintf(":%d", port)
go func() {
if cctx.Bool("use-ssl") {
err = e.StartAutoTLS(listenAddress)
} else {
err = e.Start(listenAddress)
}
if err != nil {
logger.Error("failed to start server", "err", err)
}
}()
<-ctx.Done()
logger.Info("shutting down server...")
wg.Wait()
logger.Info("server shutdown complete")
return nil
}
func Fire(cctx *cli.Context) error {
ctx := cctx.Context
ctx, cancel := context.WithCancel(ctx)
defer cancel()
// Trap SIGINT to trigger a shutdown.
signals := make(chan os.Signal, 1)
signal.Notify(signals, syscall.SIGINT, syscall.SIGTERM)
go func() {
select {
case <-signals:
cancel()
fmt.Println("shutting down on signal")
// Give the server some time to shutdown gracefully, then exit.
time.Sleep(time.Second * 5)
os.Exit(0)
case <-ctx.Done():
fmt.Println("shutting down on context done")
}
}()
logger := slog.New(slog.NewJSONHandler(os.Stdout, &slog.HandlerOptions{
Level: slog.LevelInfo,
}))
defer func() {
logger.Info("main function teardown")
}()
logger = logger.With("source", "supercollider_main")
logger.Info("Starting Supercollider in Fire Mode")
// Try to read the key from disk
keyBytes, err := os.ReadFile(cctx.String("key-file"))
if err != nil {
logger.Warn("failed to read key from disk, creating new key", "err", err.Error())
}
var privkey *godid.PrivKey
if len(keyBytes) == 0 {
privkey, err = godid.GeneratePrivKey(rand.Reader, godid.KeyTypeSecp256k1)
if err != nil {
log.Fatalf("failed to generate privkey: %+v\n", err)
}
rawKey, err := privkey.RawBytes()
if err != nil {
log.Fatalf("failed to serialize privkey: %+v\n", err)
}
err = os.WriteFile(cctx.String("key-file"), rawKey, 0644)
if err != nil {
log.Fatalf("failed to write privkey to disk: %+v\n", err)
}
} else {
privkey, err = godid.PrivKeyFromRawBytes(godid.KeyTypeSecp256k1, keyBytes)
if err != nil {
log.Fatalf("failed to parse privkey from disk: %+v\n", err)
}
}
vMethod, err := godid.VerificationMethodFromKey(privkey.Public())
if err != nil {
log.Fatalf("failed to generate verification method: %+v\n", err)
}
// Instantiate Server
s := &Server{
Logger: logger,
EnableSSL: cctx.Bool("use-ssl"),
Host: cctx.String("hostname"),
MultibaseKey: *vMethod.PublicKeyMultibase,
MaxEventsPerSecond: cctx.Int("events-per-second"),
PlaybackFile: cctx.String("input-file"),
}
// HTTP Server setup and Middleware Plumbing
e := echo.New()
e.AutoTLSManager.Cache = autocert.DirCache("/var/www/.cache")
pprof.Register(e)
e.Use(middleware.LoggerWithConfig(middleware.LoggerConfig{
Format: "method=${method}, ip=${remote_ip}, uri=${uri}, status=${status} latency=${latency_human} (ua=${user_agent})\n",
}))
// Configure the HTTP Error Handler to support Websocket errors
e.HTTPErrorHandler = func(err error, ctx echo.Context) {
switch err := err.(type) {
case *echo.HTTPError:
if err2 := ctx.JSON(err.Code, map[string]any{
"error": err.Message,
}); err2 != nil {
logger.Error("Failed to write http error", "err", err2)
}
default:
sendHeader := true
if ctx.Path() == "/xrpc/com.atproto.sync.subscribeRepos" {
sendHeader = false
}
logger.Warn("HANDLER ERROR", "path", ctx.Path(), "err", err)
if sendHeader {
ctx.Response().WriteHeader(500)
}
}
}
e.GET("/", func(c echo.Context) error {
return c.HTML(http.StatusOK, `<h1>Supercollider is firing...</h1>`)
})
e.GET("/.well-known/did.json", s.HandleWellKnownDid)
e.GET("/.well-known/atproto-did", s.HandleAtprotoDid)
e.GET("/xrpc/com.atproto.server.describeServer", s.DescribeServerHandler)
e.GET("/xrpc/com.atproto.sync.subscribeRepos", s.HandleSubscribeRepos)
e.GET("/metrics", echo.WrapHandler(promhttp.Handler()))
port := cctx.Int("port")
if port == 0 {
if cctx.Bool("use-ssl") {
port = 443
} else {
port = 80
}
}
listenAddress := fmt.Sprintf(":%d", port)
go func() {
if cctx.Bool("use-ssl") {
err = e.StartAutoTLS(listenAddress)
} else {
err = e.Start(listenAddress)
}
if err != nil {
logger.Error("failed to start server", "err", err)
}
}()
<-ctx.Done()
logger.Info("shutting down server")
return nil
}
// Configure a gorm SQLite DB with some sensible defaults
func setupDb(p string) (*gorm.DB, error) {
db, err := gorm.Open(sqlite.Open(p))
if err != nil {
return nil, fmt.Errorf("failed to open db: %w", err)
}
if err := db.Exec(`PRAGMA journal_mode=WAL;
pragma synchronous = normal;
pragma temp_store = memory;
pragma mmap_size = 30000000000;`,
).Error; err != nil {
return nil, fmt.Errorf("failed to set pragma modes: %w", err)
}
return db, nil
}
// Stand up a Repo Manager with a Web DID Resolver
func initSpeedyRepoMan(key *godid.PrivKey) (*repomgr.RepoManager, *godid.PrivKey, error) {
dir, err := os.MkdirTemp("", "supercollider")
if err != nil {
return nil, nil, err
}
cardb, err := setupDb("file::memory:?cache=shared")
if err != nil {
return nil, nil, err
}
cspath := filepath.Join(dir, "carstore")
if err := os.Mkdir(cspath, 0775); err != nil {
return nil, nil, err
}
cs, err := carstore.NewCarStore(cardb, cspath)
if err != nil {
return nil, nil, err
}
mr := did.NewMultiResolver()
mr.AddHandler("web", &did.WebResolver{
Insecure: true,
})
cachedidr := plc.NewCachingDidResolver(mr, time.Minute*5, 1000)
kmgr := indexer.NewKeyManager(cachedidr, key)
repoman := repomgr.NewRepoManager(cs, kmgr)
return repoman, key, nil
}
// HandleRepoEvent is the callback for the RepoManager
func (s *Server) HandleRepoEvent(ctx context.Context, evt *repomgr.RepoEvent) {
var outops []*comatproto.SyncSubscribeRepos_RepoOp
for _, op := range evt.Ops {
link := (*lexutil.LexLink)(op.RecCid)
outops = append(outops, &comatproto.SyncSubscribeRepos_RepoOp{
Path: op.Collection + "/" + op.Rkey,
Action: string(op.Kind),
Cid: link,
})
}
toobig := false
if err := s.Events.AddEvent(ctx, &events.XRPCStreamEvent{
RepoCommit: &comatproto.SyncSubscribeRepos_Commit{
Repo: s.Dids[evt.User-1],
Prev: (*lexutil.LexLink)(evt.OldRoot),
Blocks: evt.RepoSlice,
Commit: lexutil.LexLink(evt.NewRoot),
Time: time.Now().Format(util.ISO8601),
Ops: outops,
TooBig: toobig,
},
PrivUid: evt.User,
}); err != nil {
s.Logger.Error("failed to add event", "err", err)
}
}
// EventGenerationLoop is the main loop for generating events
func (s *Server) EventGenerationLoop(ctx context.Context, cancel context.CancelFunc) {
defer cancel()
s.Logger.Info(fmt.Sprintf("starting event generation for %d events", s.TotalDesiredEvents))
s.Logger.Info(fmt.Sprintf("initializing %d fake users", len(s.Dids)))
for i, did := range s.Dids {
uid := models.Uid(i + 1)
if err := s.RepoManager.InitNewActor(ctx, uid, strings.TrimPrefix(did, "did:web:"), did, "catdog", "", ""); err != nil {
log.Fatalf("failed to init actor: %+v\n", err)
}
}
s.Logger.Info("generating events", "count", s.TotalDesiredEvents)
for i := 0; i < s.TotalDesiredEvents; i++ {
text := fake.SentencesN(3)
// Trim to 300 chars
if len(text) > 300 {
text = text[:300]
}
_, _, err := s.RepoManager.CreateRecord(ctx, models.Uid(i%len(s.Dids)+1), "app.bsky.feed.post", &bsky.FeedPost{
CreatedAt: time.Now().Format(util.ISO8601),
Text: text,
})
if err != nil {
s.Logger.Error("failed to create record", "err", err)
} else {
eventsGeneratedCounter.Inc()
}
select {
case <-ctx.Done():
s.Logger.Info("shutting down event generation loop on context done")
return
default:
}
}
s.Logger.Info("event generation complete, shutting down")
return
}
// ATProto Handlers for DID Web
// HandleAtprotoDid handles reverse-lookups (handle -> DID)
func (s *Server) HandleAtprotoDid(c echo.Context) error {
return c.String(http.StatusOK, "did:web:"+c.Request().Host)
}
// HandleWellKnownDid handles DID document lookups (DID -> identity)
func (s *Server) HandleWellKnownDid(c echo.Context) error {
return c.JSON(http.StatusOK, map[string]any{
"@context": []string{"https://www.w3.org/ns/did/v1"},
"id": "did:web:" + c.Request().Host,
"alsoKnownAs": []string{
"at://" + c.Request().Host,
},
"verificationMethod": []map[string]any{
{
"id": "#atproto",
"type": godid.KeyTypeSecp256k1,
"controller": "did:web:" + s.Host,
"publicKeyMultibase": s.MultibaseKey,
},
},
"service": []map[string]any{
{
"id": "#atproto_pds",
"type": "AtprotoPersonalDataServer",
"serviceEndpoint": "http://" + s.Host,
},
},
})
}
// DescribeServerHandler identifies the server as a PDS (even though it isn't)
func (s *Server) DescribeServerHandler(c echo.Context) error {
invcode := false
resp := &atproto.ServerDescribeServer_Output{
InviteCodeRequired: &invcode,
AvailableUserDomains: []string{},
Links: &atproto.ServerDescribeServer_Links{},
}
return c.JSON(http.StatusOK, resp)
}
// HandleSubscribeRepos opens and manages a websocket connection for subscribing to repo events
func (s *Server) HandleSubscribeRepos(c echo.Context) error {
s.Logger.Info("new repo subscription", "remote", c.Request().RemoteAddr)
conn, err := websocket.Upgrade(c.Response().Writer, c.Request(), c.Response().Header(), 1<<10, 1<<10)
if err != nil {
return err
}
defer conn.Close()
ctx := c.Request().Context()
limiter := rate.NewLimiter(rate.Limit(s.MaxEventsPerSecond), 10)
f, err := os.Open(s.PlaybackFile)
if err != nil {
s.Logger.Error("failed to open playback file", "err", err)
return err
}
defer f.Close()
// Set a ping handler
conn.SetPingHandler(func(message string) error {
err := conn.WriteControl(websocket.PongMessage, []byte(message), time.Now().Add(time.Second*60))
if err == websocket.ErrCloseSent {
return nil
} else if e, ok := err.(net.Error); ok && e.Temporary() {
return nil
}
return err
})
// Start a goroutine to read messages from the client and discard them.
go func() {
for {
_, _, err := conn.ReadMessage()
if err != nil {
return
}
}
}()
header := cbg.Deferred{}
obj := cbg.Deferred{}
for {
wc, err := conn.NextWriter(websocket.BinaryMessage)
if err != nil {
return err
}
limiter.Wait(ctx)
if err := header.UnmarshalCBOR(f); err != nil {
return fmt.Errorf("failed to read header: %w", err)
}
if err := obj.UnmarshalCBOR(f); err != nil {
return fmt.Errorf("failed to read event: %w", err)
}
if err := header.MarshalCBOR(wc); err != nil {
return fmt.Errorf("failed to write header: %w", err)
}
if err := obj.MarshalCBOR(wc); err != nil {
return fmt.Errorf("failed to write event: %w", err)
}
if err := wc.Close(); err != nil {
return fmt.Errorf("failed to flush-close our event write: %w", err)
}
eventsSentCounter.Inc()
}
}