IPFS http 响应偶尔会出现正确正文的 EOF 错误

Question

当我在下面code中调试时，有时它可以正确地从正文中读取数据，但出现EOF错误。

func (r *trailerReader) Read(b []byte) (int, error) {
    n, err := r.resp.Body.Read(b)
    if err != nil {
        if e := r.resp.Trailer.Get("X-Stream-Error"); e != "" {
            err = errors.New(e)
        }
    }
    return n, err
}

我在代码中调用了 this method：

// FilesRead read a file in a given MFS
func (s *Shell) FilesRead(ctx context.Context, path string, options ...FilesOpt) (io.ReadCloser, error) {
    rb := s.Request("files/read", path)
    for _, opt := range options {
        if err := opt(rb); err != nil {
            return nil, err
        }
    }

    resp, err := rb.Send(ctx)
    if err != nil {
        return nil, err
    }
    if resp.Error != nil {
        return nil, resp.Error
    }

    return resp.Output, nil
}

有什么想法吗？

Answer 1

正如 Stebalien 在此 Github issue 中所说，这是 Reader 的预期行为。

参考本文第三段documentation

When Read encounters an error or end-of-file condition after successfully reading n > 0 bytes, it returns the number of bytes read. It may return the (non-nil) error from the same call or return the error (and n == 0) from a subsequent call. An instance of this general case is that a Reader returning a non-zero number of bytes at the end of the input stream may return either err == EOF or err == nil. The next Read should return 0, EOF.

IPFS http 响应偶尔会出现正确正文的 EOF 错误

IPFS http response got EOF error with correct body occasionally

go

ipfs