microsoft/typescript-go · error

jsonrpc: read header: %w

Error message

jsonrpc: read header: %w

What it means

Error "jsonrpc: read header: %w" thrown in microsoft/typescript-go.

Source

Thrown at internal/jsonrpc/baseproto.go:43

// NewReader creates a new Reader.
func NewReader(r io.Reader) *Reader {
	return &Reader{
		r: bufio.NewReader(r),
	}
}

// Read reads the next message payload.
func (r *Reader) Read() ([]byte, error) {
	var contentLength int64

	for {
		line, err := r.r.ReadBytes('\n')
		if err != nil {
			if errors.Is(err, io.EOF) {
				return nil, io.EOF
			}
			return nil, fmt.Errorf("jsonrpc: read header: %w", err)
		}

		if bytes.Equal(line, []byte("\r\n")) {
			break
		}

		key, value, ok := bytes.Cut(line, []byte(":"))
		if !ok {
			return nil, fmt.Errorf("%w: %q", ErrInvalidHeader, line)
		}

		if bytes.Equal(key, []byte("Content-Length")) {
			contentLength, err = strconv.ParseInt(string(bytes.TrimSpace(value)), 10, 64)
			if err != nil {
				return nil, fmt.Errorf("%w: parse error: %w", ErrInvalidContentLength, err)
			}
			if contentLength < 0 {
				return nil, fmt.Errorf("%w: negative value %d", ErrInvalidContentLength, contentLength)

View on GitHub (pinned to 1bcfa18d79)

When it happens

Trigger: Thrown at internal/jsonrpc/baseproto.go:43 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of microsoft/typescript-go@1bcfa18d79 (2026-08-16). Data as JSON: /api/errors/d6be4025b83c1d22. Report an issue: GitHub.