amir20/dozzle · error

invalid end time format (expected RFC3339)

Error message

invalid end time format (expected RFC3339): %w

What it means

Same validation as the start time, applied to args.End. A non-empty end argument that fails time.Parse(time.RFC3339, ...) is wrapped as 'invalid end time format (expected RFC3339)'. Defaults to time.Now() when omitted.

Solutions

1. Pass end as full RFC3339 with timezone, e.g. 2024-05-01T10:00:00Z
2. Omit end (defaults to now)
3. Validate the timestamp client-side with a strict RFC3339 parser before the call

Example fix

// before
{"container_id":"abc","end":"now"}
// after
{"container_id":"abc","end":"2024-05-01T10:00:00Z"}

function isValidRFC3339(s) { if (!s) return true; return /^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}(\.\d+)?(Z|[+-]\d{2}:\d{2})$/.test(s) && !isNaN(Date.parse(s)); }
if (args.end && !isValidRFC3339(args.end)) args.end = new Date().toISOString();

null

When it happens

Trigger: Calling fetch_container_logs with args.end like 'now', '2024/05/01', '1700000000', or an RFC3339-like string lacking an offset ('2024-05-01T10:00:00').

Common situations: Tool callers using locale-specific date formatting; unix epoch integers passed as end boundaries; partial ISO dates without seconds or zone.

Related errors

• invalid start time format (expected RFC3339)
• unknown action
• invalid regex pattern
• is required
• container_id is required

AI-assisted analysis of amir20/dozzle@d9463cbe21 (2026-09-07). Data as JSON: /api/errors/5250268cc59b0e5c. Report an issue: GitHub.

Appendix: source

Thrown at internal/cloud/tools_logs.go:52

	cs, err := deps.HostService.FindContainer(hostID, containerID, deps.Labels)
	if err != nil {
		return nil, fmt.Errorf("container not found: %w", err)
	}

	start := time.Now().Add(-1 * time.Hour)
	end := time.Now()
	if args.Start != "" {
		t, err := time.Parse(time.RFC3339, args.Start)
		if err != nil {
			return nil, fmt.Errorf("invalid start time format (expected RFC3339): %w", err)
		}
		start = t
	}
	if args.End != "" {
		t, err := time.Parse(time.RFC3339, args.End)
		if err != nil {
			return nil, fmt.Errorf("invalid end time format (expected RFC3339): %w", err)
		}
		end = t
	}

	var re *regexp.Regexp
	if args.Regex != "" {
		var err error
		re, err = regexp.Compile(args.Regex)
		if err != nil {
			return nil, fmt.Errorf("invalid regex pattern: %w", err)
		}
	}

	ctx, cancel := context.WithCancel(ctx)
	defer cancel()

	logCh, err := cs.LogsBetweenDates(ctx, start, end, container.STDOUT|container.STDERR)
	if err != nil {

View on GitHub (pinned to d9463cbe21)