Re: File overwritten with HTTP/1.1 304 Not Modified
Date: Tue, 3 Sep 2019 11:10:25 +0200 (CEST)
On Sat, 31 Aug 2019, Paul Gilmartin via curl-users wrote:
> *however* my --output file is overwritten with an empty file.
> I'd prefer that this not happen.
>
> Is there a combination of options that preserves the file in case of 304?
> Should I consider this a bug?
>
> I believe an earlier release of curl on Raspberry Pi did not overwrite.
I believe we may have at some point changed the behavior slightly on writing a
zero byte body - but I can't remember why. I don't think this is 304 specific
but works the same no matter which response code.
The question of course remains what the "correct" behavior is. A zero byte
file could very well be interpreted as the correct way to represent a zero
byte response body...
> I understand that in case of some errors, such as 404, the user prefers to
> receive the file.
1. curl will of course save the response body for any response code, but 304s
are special as they are defined to never have a body.
2. --fail will make curl not save the 404 response body
-- / daniel.haxx.se | Get the best commercial curl support there is - from me | Private help, bug fixes, support, ports, new features | https://www.wolfssl.com/contact/ ----------------------------------------------------------- Unsubscribe: https://cool.haxx.se/list/listinfo/curl-users Etiquette: https://curl.haxx.se/mail/etiquette.htmlReceived on 2019-09-03