Function peekContentType

imageproxy.go:350–356

peekContentType peeks at the first 512 bytes of p, and attempts to detect the content type. Returns empty string if error occurs.

(p *bufio.Reader)

// peekContentType peeks at the first 512 bytes of p, and attempts to detect
// the content type.  Returns empty string if error occurs.
func peekContentType(p *bufio.Reader) string {
	byt, err := p.Peek(512)
	if err != nil && !errors.Is(err, bufio.ErrBufferFull) && !errors.Is(err, io.EOF) {
		return ""
	}
	return http.DetectContentType(byt)
}

// copyHeader copies values for specified headers from src to dst, adding to
// any existing values with the same header name.