commit 55ef369a92e3d59de2fb8b6ae2944dc12c9164c1 · veryroundbird.house/core

+14

cmd/spindle/main.go

···

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       package main

     

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       +
       import (

     

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       	"context"

     

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       	"os"

     

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       +
       

     

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       	"tangled.sh/tangled.sh/core/log"

     

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       	"tangled.sh/tangled.sh/core/spindle"

     

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       )

     

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       func main() {

     

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       	ctx := log.NewContext(context.Background(), "spindle")

     

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       	err := spindle.Run(ctx)

     

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       	if err != nil {

     

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       		log.FromContext(ctx).Error("error running spindle", "error", err)

     

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       		os.Exit(-1)

     

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       	}

     

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       }

+28

spindle/config/config.go

···

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       package config

     

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       +
       

     

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       import (

     

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       	"context"

     

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       +
       

     

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       	"github.com/sethvargo/go-envconfig"

     

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       )

     

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       type Server struct {

     

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       	ListenAddr        string `env:"LISTEN_ADDR, default=0.0.0.0:6555"`

     

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       	DBPath            string `env:"DB_PATH, default=spindle.db"`

     

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       	Hostname          string `env:"HOSTNAME, required"`

     

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       	JetstreamEndpoint string `env:"JETSTREAM_ENDPOINT, default=wss://jetstream1.us-west.bsky.network/subscribe"`

     

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       }

     

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       type Config struct {

     

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       	Server Server `env:",prefix=SPINDLE_SERVER_"`

     

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       }

     

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       func Load(ctx context.Context) (*Config, error) {

     

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       	var cfg Config

     

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       	err := envconfig.Process(ctx, &cfg)

     

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       	if err != nil {

     

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       		return nil, err

     

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       	}

     

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       +
       

     

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       	return &cfg, nil

     

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       }

+56

spindle/db/db.go

···

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       package db

     

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       import "database/sql"

     

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       type DB struct {

     

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       	*sql.DB

     

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       }

     

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       +
       

     

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       func Make(dbPath string) (*DB, error) {

     

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       	db, err := sql.Open("sqlite3", dbPath)

     

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       	if err != nil {

     

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       		return nil, err

     

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       	}

     

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       +
       

     

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       	_, err = db.Exec(`

     

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       		pragma journal_mode = WAL;

     

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       		pragma synchronous = normal;

     

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       		pragma foreign_keys = on;

     

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       		pragma temp_store = memory;

     

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       		pragma mmap_size = 30000000000;

     

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       		pragma page_size = 32768;

     

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       		pragma auto_vacuum = incremental;

     

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       		pragma busy_timeout = 5000;

     

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       +
       

     

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       		create table if not exists known_dids (

     

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       			did text primary key

     

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       		);

     

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       		create table if not exists pipelines (

     

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       			rkey text not null,

     

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       			pipeline text not null, -- json

     

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       			primary key rkey

     

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       		);

     

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       	`)

     

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       	if err != nil {

     

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       		return nil, err

     

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       	}

     

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       +
       

     

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       	return &DB{db}, nil

     

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       }

     

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       func (d *DB) SaveLastTimeUs(lastTimeUs int64) error {

     

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       	_, err := d.Exec(`

     

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       		insert into _jetstream (id, last_time_us)

     

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       		values (1, ?)

     

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       		on conflict(id) do update set last_time_us = excluded.last_time_us

     

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       	`, lastTimeUs)

     

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       	return err

     

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       }

     

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       func (d *DB) GetLastTimeUs() (int64, error) {

     

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       	var lastTimeUs int64

     

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       	row := d.QueryRow(`select last_time_us from _jetstream where id = 1;`)

     

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       	err := row.Scan(&lastTimeUs)

     

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       	return lastTimeUs, err

     

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       }

+83

spindle/db/pipelines.go

···

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       package db

     

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       import (

     

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       	"fmt"

     

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       )

     

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       type Pipeline struct {

     

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       	Rkey         string

     

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       	PipelineJson string

     

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       }

     

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       func (d *DB) InsertPipeline(pipeline Pipeline) error {

     

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       	_, err := d.Exec(

     

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       		`insert into pipelines (rkey, nsid, event) values (?, ?, ?)`,

     

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       		pipeline.Rkey,

     

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       		pipeline.PipelineJson,

     

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       	)

     

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       	return err

     

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       }

     

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       func (d *DB) GetPipeline(rkey, cursor string) (Pipeline, error) {

     

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       	whereClause := "where rkey = ?"

     

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       	args := []any{rkey}

     

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       	if cursor != "" {

     

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       		whereClause += " and rkey > ?"

     

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       		args = append(args, cursor)

     

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       	}

     

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       	query := fmt.Sprintf(`

     

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       		select rkey, pipeline

     

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       		from pipelines

     

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       		%s

     

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       		limit 1

     

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       	`, whereClause)

     

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       	row := d.QueryRow(query, args...)

     

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       +
       

     

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       	var p Pipeline

     

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       	err := row.Scan(&p.Rkey, &p.PipelineJson)

     

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       +
       	if err != nil {

     

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       		return Pipeline{}, err

     

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       	}

     

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       +
       

     

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       	return p, nil

     

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       }

     

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       +
       

     

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       func (d *DB) GetPipelines(cursor string) ([]Pipeline, error) {

     

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       	whereClause := ""

     

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       	args := []any{}

     

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       	if cursor != "" {

     

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       		whereClause = "where rkey > ?"

     

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       		args = append(args, cursor)

     

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       	}

     

       56
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       +
       

     

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       	query := fmt.Sprintf(`

     

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       		select rkey, nsid, pipeline

     

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       		from pipelines

     

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       		%s

     

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       		order by rkey asc

     

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       		limit 100

     

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       	`, whereClause)

     

       64
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       +
       

     

       65
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       	rows, err := d.Query(query, args...)

     

       66
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       +
       	if err != nil {

     

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       		return nil, err

     

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       	}

     

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       	defer rows.Close()

     

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       +
       

     

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       	var evts []Pipeline

     

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       	for rows.Next() {

     

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       		var ev Pipeline

     

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       		rows.Scan(&ev.Rkey, &ev.PipelineJson)

     

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       		evts = append(evts, ev)

     

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       	}

     

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       +
       

     

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       	if err := rows.Err(); err != nil {

     

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       		return nil, err

     

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       +
       	}

     

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       +
       

     

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       	return evts, nil

     

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       +
       }

+71

spindle/server.go

···

       1
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       package spindle

     

       2
       2
       +
       

     

       3
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       import (

     

       4
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       	"fmt"

     

       5
       5
       +
       	"log/slog"

     

       6
       6
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       	"net/http"

     

       7
       7
       +
       

     

       8
       8
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       	"golang.org/x/net/context"

     

       9
       9
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       	"tangled.sh/tangled.sh/core/api/tangled"

     

       10
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       	"tangled.sh/tangled.sh/core/jetstream"

     

       11
       11
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       	"tangled.sh/tangled.sh/core/knotserver/notifier"

     

       12
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       	"tangled.sh/tangled.sh/core/log"

     

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       	"tangled.sh/tangled.sh/core/rbac"

     

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       	"tangled.sh/tangled.sh/core/spindle/config"

     

       15
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       	"tangled.sh/tangled.sh/core/spindle/db"

     

       16
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       )

     

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       +
       

     

       18
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       type Spindle struct {

     

       19
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       	jc *jetstream.JetstreamClient

     

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       	db *db.DB

     

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       	e  *rbac.Enforcer

     

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       22
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       	l  *slog.Logger

     

       23
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       +
       	n  *notifier.Notifier

     

       24
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       +
       }

     

       25
       25
       +
       

     

       26
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       +
       func Run(ctx context.Context) error {

     

       27
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       	cfg, err := config.Load(ctx)

     

       28
       28
       +
       	if err != nil {

     

       29
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       		return fmt.Errorf("failed to load config: %w", err)

     

       30
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       +
       	}

     

       31
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       +
       

     

       32
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       	d, err := db.Make(cfg.Server.DBPath)

     

       33
       33
       +
       	if err != nil {

     

       34
       34
       +
       		return fmt.Errorf("failed to setup db: %w", err)

     

       35
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       +
       	}

     

       36
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       +
       

     

       37
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       	e, err := rbac.NewEnforcer(cfg.Server.DBPath)

     

       38
       38
       +
       	if err != nil {

     

       39
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       +
       		return fmt.Errorf("failed to setup rbac enforcer: %w", err)

     

       40
       40
       +
       	}

     

       41
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       +
       

     

       42
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       	logger := log.FromContext(ctx)

     

       43
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       +
       

     

       44
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       +
       	collections := []string{tangled.SpindleMemberNSID}

     

       45
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       +
       	jc, err := jetstream.NewJetstreamClient(cfg.Server.JetstreamEndpoint, "spindle", collections, nil, logger, d, true, false)

     

       46
       46
       +
       	if err != nil {

     

       47
       47
       +
       		return fmt.Errorf("failed to setup jetstream client: %w", err)

     

       48
       48
       +
       	}

     

       49
       49
       +
       

     

       50
       50
       +
       	n := notifier.New()

     

       51
       51
       +
       

     

       52
       52
       +
       	spindle := Spindle{

     

       53
       53
       +
       		jc: jc,

     

       54
       54
       +
       		e:  e,

     

       55
       55
       +
       		db: d,

     

       56
       56
       +
       		l:  logger,

     

       57
       57
       +
       		n:  &n,

     

       58
       58
       +
       	}

     

       59
       59
       +
       

     

       60
       60
       +
       	logger.Info("starting spindle server", "address", cfg.Server.ListenAddr)

     

       61
       61
       +
       	logger.Error("server error", "error", http.ListenAndServe(cfg.Server.ListenAddr, spindle.Router()))

     

       62
       62
       +
       

     

       63
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       +
       	return nil

     

       64
       64
       +
       }

     

       65
       65
       +
       

     

       66
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       +
       func (s *Spindle) Router() http.Handler {

     

       67
       67
       +
       	mux := &http.ServeMux{}

     

       68
       68
       +
       

     

       69
       69
       +
       	mux.HandleFunc("/events", s.Events)

     

       70
       70
       +
       	return mux

     

       71
       71
       +
       }

+93

spindle/stream.go

···

       1
       1
       +
       package spindle

     

       2
       2
       +
       

     

       3
       3
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       import (

     

       4
       4
       +
       	"net/http"

     

       5
       5
       +
       	"time"

     

       6
       6
       +
       

     

       7
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       	"github.com/gorilla/websocket"

     

       8
       8
       +
       	"golang.org/x/net/context"

     

       9
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       +
       )

     

       10
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       +
       

     

       11
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       var upgrader = websocket.Upgrader{

     

       12
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       +
       	ReadBufferSize:  1024,

     

       13
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       +
       	WriteBufferSize: 1024,

     

       14
       14
       +
       }

     

       15
       15
       +
       

     

       16
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       +
       func (s *Spindle) Events(w http.ResponseWriter, r *http.Request) {

     

       17
       17
       +
       	l := s.l.With("handler", "Events")

     

       18
       18
       +
       	l.Info("received new connection")

     

       19
       19
       +
       

     

       20
       20
       +
       	conn, err := upgrader.Upgrade(w, r, nil)

     

       21
       21
       +
       	if err != nil {

     

       22
       22
       +
       		l.Error("websocket upgrade failed", "err", err)

     

       23
       23
       +
       		w.WriteHeader(http.StatusInternalServerError)

     

       24
       24
       +
       		return

     

       25
       25
       +
       	}

     

       26
       26
       +
       	defer conn.Close()

     

       27
       27
       +
       	l.Info("upgraded http to wss")

     

       28
       28
       +
       

     

       29
       29
       +
       	ch := s.n.Subscribe()

     

       30
       30
       +
       	defer s.n.Unsubscribe(ch)

     

       31
       31
       +
       

     

       32
       32
       +
       	ctx, cancel := context.WithCancel(r.Context())

     

       33
       33
       +
       	defer cancel()

     

       34
       34
       +
       	go func() {

     

       35
       35
       +
       		for {

     

       36
       36
       +
       			if _, _, err := conn.NextReader(); err != nil {

     

       37
       37
       +
       				l.Error("failed to read", "err", err)

     

       38
       38
       +
       				cancel()

     

       39
       39
       +
       				return

     

       40
       40
       +
       			}

     

       41
       41
       +
       		}

     

       42
       42
       +
       	}()

     

       43
       43
       +
       

     

       44
       44
       +
       	cursor := ""

     

       45
       45
       +
       

     

       46
       46
       +
       	// complete backfill first before going to live data

     

       47
       47
       +
       	l.Info("going through backfill", "cursor", cursor)

     

       48
       48
       +
       	if err := s.streamPipelines(conn, &cursor); err != nil {

     

       49
       49
       +
       		l.Error("failed to backfill", "err", err)

     

       50
       50
       +
       		return

     

       51
       51
       +
       	}

     

       52
       52
       +
       

     

       53
       53
       +
       	for {

     

       54
       54
       +
       		// wait for new data or timeout

     

       55
       55
       +
       		select {

     

       56
       56
       +
       		case <-ctx.Done():

     

       57
       57
       +
       			l.Info("stopping stream: client closed connection")

     

       58
       58
       +
       			return

     

       59
       59
       +
       		case <-ch:

     

       60
       60
       +
       			// we have been notified of new data

     

       61
       61
       +
       			l.Info("going through live data", "cursor", cursor)

     

       62
       62
       +
       			if err := s.streamPipelines(conn, &cursor); err != nil {

     

       63
       63
       +
       				l.Error("failed to stream", "err", err)

     

       64
       64
       +
       				return

     

       65
       65
       +
       			}

     

       66
       66
       +
       		case <-time.After(30 * time.Second):

     

       67
       67
       +
       			// send a keep-alive

     

       68
       68
       +
       			l.Info("sent keepalive")

     

       69
       69
       +
       			if err = conn.WriteControl(websocket.PingMessage, []byte{}, time.Now().Add(time.Second)); err != nil {

     

       70
       70
       +
       				l.Error("failed to write control", "err", err)

     

       71
       71
       +
       			}

     

       72
       72
       +
       		}

     

       73
       73
       +
       	}

     

       74
       74
       +
       }

     

       75
       75
       +
       

     

       76
       76
       +
       func (s *Spindle) streamPipelines(conn *websocket.Conn, cursor *string) error {

     

       77
       77
       +
       	ops, err := s.db.GetPipelines(*cursor)

     

       78
       78
       +
       	if err != nil {

     

       79
       79
       +
       		s.l.Debug("err", "err", err)

     

       80
       80
       +
       		return err

     

       81
       81
       +
       	}

     

       82
       82
       +
       	s.l.Debug("ops", "ops", ops)

     

       83
       83
       +
       

     

       84
       84
       +
       	for _, op := range ops {

     

       85
       85
       +
       		if err := conn.WriteJSON(op); err != nil {

     

       86
       86
       +
       			s.l.Debug("err", "err", err)

     

       87
       87
       +
       			return err

     

       88
       88
       +
       		}

     

       89
       89
       +
       		*cursor = op.Rkey

     

       90
       90
       +
       	}

     

       91
       91
       +
       

     

       92
       92
       +
       	return nil

     

       93
       93
       +
       }