* add bufsize plugin
Signed-off-by: ykhr53 <yukihira.lab@gmail.com>

* add docstring and comment
Signed-off-by: ykhr53 <yukihira.lab@gmail.com>

* delete stdout messages when get an error
Signed-off-by: ykhr53 <yukihira.lab@gmail.com>

* change to context.Background from TODO
Signed-off-by: ykhr53 <yukihira.lab@gmail.com>

* define default bufsize as defaultBufSize constant
Signed-off-by: ykhr53 <yukihira.lab@gmail.com>

* fix some comments
Signed-off-by: ykhr53 <yukihira.lab@gmail.com>

* function name change: parse
Signed-off-by: ykhr53 <yukihira.lab@gmail.com>

* function name change: parse
Signed-off-by: ykhr53 <yukihira.lab@gmail.com>