| 1 | package main |
| 2 | |
| 3 | import ( |
| 4 | "cmp" |
| 5 | "context" |
| 6 | "encoding/base64" |
| 7 | "errors" |
| 8 | "fmt" |
| 9 | "log" |
| 10 | "net/http" |
| 11 | "os" |
| 12 | "os/signal" |
| 13 | "strconv" |
| 14 | "syscall" |
| 15 | "time" |
| 16 | |
| 17 | "github.com/jackc/pgx/v5/pgxpool" |
| 18 | ) |
| 19 | |
| 20 | func main() { |
| 21 | ctx, stop := |
| 22 | defer stop() |
| 23 | databaseURL := os. |
| 24 | port := os. |
| 25 | if port == "" |
| 26 | port = "8080" |
| 27 | } |
| 28 | |
| 29 | if databaseURL == "" |
| 30 | log.Fatal("DATABASE_URL is not set |
| 31 | } |
| 32 | workers := 32 |
| 33 | if v := os |
| 34 | n, err := |
| 35 | if err != nil |
| 36 | log.Fatalf("WORKERS must be a positive integer, got |
| 37 | } |
| 38 | workers = n |
| 39 | } |
| 40 | pool, err := |
| 41 | if err != nil |
| 42 | log.Fatalf("unable to connect to database: |
| 43 | } |
| 44 | defer pool.Close() |
| 45 | |
| 46 | if err := pool |
| 47 | log.Fatalf("unable to connect to database: |
| 48 | } |
| 49 | |
| 50 | if _, err |
| 51 | log.Fatalf("delivery_job not found, run the migrations first: |
| 52 | } |
| 53 | |
| 54 | mux := http. |
| 55 | mux.HandleFunc("GET /health |
| 56 | w.Write([]byte |
| 57 | }) |
| 58 | srv := &http |
| 59 | go func() { |
| 60 | if err := srv |
| 61 | log.Fatalf("http server: |
| 62 | } |
| 63 | }() |
| 64 | log.Printf("listening on : |
| 65 | |
| 66 | wake := make( |
| 67 | go listen(ctx, |
| 68 | go pruneEvery(ctx, |
| 69 | email := relaySender |
| 70 | url: os.Getenv |
| 71 | secret: os.Getenv |
| 72 | from: cmp.Or |
| 73 | client: &http |
| 74 | } |
| 75 | if email.url |
| 76 | log.Printf("EMAIL_PROXY is not set: email jobs will fail and retry until it is |
| 77 | } |
| 78 | var key []byte |
| 79 | if v := os |
| 80 | key, err = |
| 81 | if err != nil |
| 82 | log.Fatal("WEBHOOK_SECRET_KEY must be 32 bytes, base64-encoded |
| 83 | } |
| 84 | } else { |
| 85 | log.Printf("WEBHOOK_SECRET_KEY is not set: webhook jobs will fail and retry until it is |
| 86 | } |
| 87 | hostConcurrency := 4 |
| 88 | if v := os |
| 89 | n, err := |
| 90 | if err != nil |
| 91 | log.Fatalf("WEBHOOK_HOST_CONCURRENCY must be a positive integer, got |
| 92 | } |
| 93 | hostConcurrency = n |
| 94 | } |
| 95 | webhook := webhookSender |
| 96 | db: pool, |
| 97 | client: newWebhookClient(os |
| 98 | key: key, |
| 99 | hosts: newHostLimiter(hostConcurrency |
| 100 | } |
| 101 | send := func(ctx |
| 102 | switch j.Kind |
| 103 | case "email": |
| 104 | return email.send( |
| 105 | case "webhook": |
| 106 | return webhook.send( |
| 107 | } |
| 108 | return fmt.Errorf( |
| 109 | } |
| 110 | run(ctx, pool |
| 111 | |
| 112 | shutdownCtx, cancel := |
| 113 | defer cancel() |
| 114 | if err := srv |
| 115 | log.Printf("http shutdown: |
| 116 | } |
| 117 | } |