| 1 | package daemon |
| 2 | |
| 3 | import ( |
| 4 | "context" |
| 5 | "crypto/rand" |
| 6 | "io" |
| 7 | "net/http/httptest" |
| 8 | "net/http/httputil" |
| 9 | "net/url" |
| 10 | "os" |
| 11 | "path/filepath" |
| 12 | "strings" |
| 13 | "testing" |
| 14 | "time" |
| 15 | |
| 16 | "github.com/FelineStateMachine/tinyrelay/internal/event" |
| 17 | "github.com/FelineStateMachine/tinyrelay/internal/relay" |
| 18 | ) |
| 19 | |
| 20 | // A reverse proxy without full duplex HTTP/1.1 discards the unread request |
| 21 | // body as soon as the backend starts responding. git-http-backend writes its |
| 22 | // headers before it reads the pack, so the relay must hold the response until |
| 23 | // git produces body bytes or a large push arrives truncated at the proxy. |
| 24 | func TestLargePushSurvivesHalfDuplexReverseProxy(t *testing.T) { |
| 25 | ctx := context.Background() |
| 26 | secret := strings.Repeat("0" , 63) + "1" |
| 27 | owner, err := event.PublicKey(secret) |
| 28 | if err != nil { |
| 29 | t.Fatal(err) |
| 30 | } |
| 31 | app, tenant := testTenant(t) |
| 32 | p := tenant.Policy() |
| 33 | p.Features.Grasp = true |
| 34 | if err := tenant.applyPolicy(ctx, p); err != nil { |
| 35 | t.Fatal(err) |
| 36 | } |
| 37 | const ownerNPub = "npub10xlxvlhemja6c4dqv22uapctqupfhlxm9h8z3k2e72q4k9hcz7vqpkge6d" |
| 38 | announcement := event.Event{Kind: event.KIND_REPO, CreatedAt: time.Now().Unix(), Tags: [][]string{{"d" , "big" }, {"clone" , "http://relay.test/" + ownerNPub + "/big.git" }, {"relays" , "ws://relay.test" }}} |
| 39 | if err := event.Sign(&announcement, secret); err != nil { |
| 40 | t.Fatal(err) |
| 41 | } |
| 42 | if _, err := tenant.router.Publish(ctx, announcement, relay.Session{PubKeys: []string{owner}}); err != nil { |
| 43 | t.Fatal(err) |
| 44 | } |
| 45 | |
| 46 | work := filepath.Join(t.TempDir(), "work" ) |
| 47 | gitTest(t, "init" , "-b" , "main" , work) |
| 48 | gitTest(t, "-C" , work, "config" , "user.email" , "test@example.com" ) |
| 49 | gitTest(t, "-C" , work, "config" , "user.name" , "Test" ) |
| 50 | blob := make([]byte, 1<<20) |
| 51 | if _, err := rand.Read(blob); err != nil { |
| 52 | t.Fatal(err) |
| 53 | } |
| 54 | if err := os.WriteFile(filepath.Join(work, "blob.bin" ), blob, 0o600); err != nil { |
| 55 | t.Fatal(err) |
| 56 | } |
| 57 | gitTest(t, "-C" , work, "add" , "blob.bin" ) |
| 58 | gitTest(t, "-C" , work, "commit" , "-m" , "big" ) |
| 59 | sha := strings.TrimSpace(gitOutput(t, "-C" , work, "rev-parse" , "HEAD" )) |
| 60 | state := event.Event{Kind: event.KIND_REPO_STATE, CreatedAt: time.Now().Unix(), Tags: [][]string{{"d" , "big" }, {"HEAD" , "ref: refs/heads/main" }, {"refs/heads/main" , sha}}} |
| 61 | if err := event.Sign(&state, secret); err != nil { |
| 62 | t.Fatal(err) |
| 63 | } |
| 64 | if _, err := tenant.router.Publish(ctx, state, relay.Session{PubKeys: []string{owner}}); err != nil { |
| 65 | t.Fatal(err) |
| 66 | } |
| 67 | |
| 68 | backend := httptest.NewServer(app) |
| 69 | defer backend.Close() |
| 70 | target, err := url.Parse(backend.URL) |
| 71 | if err != nil { |
| 72 | t.Fatal(err) |
| 73 | } |
| 74 | // Throttle the upload so the backend's headers arrive while the pack is |
| 75 | // still streaming, as they do over a real network. |
| 76 | proxy := httptest.NewServer(&httputil.ReverseProxy{Rewrite: func(request *httputil.ProxyRequest) { |
| 77 | request.SetURL(target) |
| 78 | request.Out.Body = &slowBody{ReadCloser: request.In.Body} |
| 79 | }}) |
| 80 | defer proxy.Close() |
| 81 | |
| 82 | // A small post buffer makes git stream the pack as a chunked HTTP/1.1 body. |
| 83 | gitTest(t, "-C" , work, "-c" , "http.postBuffer=1024" , "-c" , "http.version=HTTP/1.1" , "push" , proxy.URL+"/r/main/" +ownerNPub+"/big.git" , "refs/heads/main:refs/heads/main" ) |
| 84 | clone := filepath.Join(t.TempDir(), "clone" ) |
| 85 | gitTest(t, "clone" , proxy.URL+"/r/main/" +ownerNPub+"/big.git" , clone) |
| 86 | if got := strings.TrimSpace(gitOutput(t, "-C" , clone, "rev-parse" , "HEAD" )); got != sha { |
| 87 | t.Fatalf("clone HEAD = %s, want %s" , got, sha) |
| 88 | } |
| 89 | } |
| 90 | |
| 91 | type slowBody struct{ io.ReadCloser } |
| 92 | |
| 93 | func (b *slowBody) Read(p []byte) (int, error) { |
| 94 | if len(p) > 4096 { |
| 95 | p = p[:4096] |
| 96 | } |
| 97 | time.Sleep(2 * time.Millisecond) |
| 98 | return b.ReadCloser.Read(p) |
| 99 | } |