[pve-devel] [PATCH http-server] fix #6503: return api handler errors in the json body

[Dominik Csapak]

similar to what we do for the extjs formatter, put the error message or
status message in the 'message' property of the return object.

This way client libraries can extract the error without having to parse
the HTTP status reason phrase (which is not possible in all http
libraries, e.g. hyperium's http rust crate).

This should not be a breaking change, since it just adds a (semi) new
field to the return value.

Signed-off-by: Dominik Csapak <d.csapak at proxmox.com>
---
we could of course put the error also in the 'errors' hash with a
special key like '_api', but i opted for mirroring the 'extjs' formatter
behaviour for consistency.

 src/PVE/APIServer/Formatter/Standard.pm | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/PVE/APIServer/Formatter/Standard.pm b/src/PVE/APIServer/Formatter/Standard.pm
index 5211473..eca928d 100644
--- a/src/PVE/APIServer/Formatter/Standard.pm
+++ b/src/PVE/APIServer/Formatter/Standard.pm
@@ -33,6 +33,10 @@ sub prepare_response_data {
 	    $res->{status} = 200;
 	}
 	$new->{success} = $success;
+    } elsif ($format eq 'json') {
+	if (HTTP::Status::is_error($res->{status})) {
+	    $new->{message} = "$res->{message}" || status_message($res->{status});
+	}
     }
 
     if ($success && $res->{total}) {
-- 
2.39.5