Function firstJSONObject

pkg/modelerrors/modelerrors.go:739–759

firstJSONObject returns the first complete JSON object found in s, or nil. encoding/json handles escaped quotes and braces inside string values. Limits parsing to 1MB to prevent memory exhaustion from malicious or accidentally huge error responses. To handle '{' characters in URLs or status text (e

(s string)

// To handle '{' characters in URLs or status text (e.g., "param={value}"),
// we try parsing from each '{' position until we find valid JSON.
func firstJSONObject(s string) []byte {
	const maxJSONSize = 1 << 20 // 1MB

	pos := 0
	for {
		idx := strings.IndexByte(s[pos:], '{')
		if idx < 0 {
			return nil
		}
		start := pos + idx

		reader := io.LimitReader(strings.NewReader(s[start:]), maxJSONSize)
		var raw json.RawMessage
		if err := json.NewDecoder(reader).Decode(&raw); err == nil {
			// Successfully decoded JSON
			return raw
		}
		// Try next '{' position
		pos = start + 1
	}
}

// scalarString renders a JSON scalar as text. JSON numbers decode to float64;
// whole numbers are rendered without a trailing ".0" so a code of 400 prints