v0.26.2 http sink backlog for late streams, web updates

internal/config/config.go

@@ -293,6 +293,7 @@ type HTTPSinkOptions struct {
 	ClientBufferSize int64        `toml:"client_buffer_size"` // per-client send queue
 	WriteTimeoutMS   int64        `toml:"write_timeout_ms"`   // per-SSE-write deadline, 0 = none
 	MaxConnections   int64        `toml:"max_connections"`    // 0 = unlimited
+	ReplayLines      int64        `toml:"replay_lines"`       // entries a new stream gets first, 0 = none
 	LoginPage        bool         `toml:"login_page"`         // GET /auth/login, needs auth.trusted_proxies
 	ViewerPage       bool         `toml:"viewer_page"`        // GET /auth/view, needs login_page
 	Auth             *AuthOptions `toml:"auth"`

internal/config/preset.go

@@ -97,6 +97,7 @@ var presets = []Preset{
 			default:
 				return fmt.Errorf("viewer %q (valid: true, false)", v["viewer"])
 			}
+			sink["replay_lines"] = int64(1000) // a browser opened late sees the recent entries
 			p.Flow.Format = &FormatConfig{Type: v["format"]}
 			p.PluginSinks = append(p.PluginSinks, PluginSinkConfig{ID: "http", Type: "http", Config: sink})
 			return nil