qemu/scripts/qmp
Daniel P. Berrange e55250c6cb qmp-shell: fix pretty printing of JSON responses
Pretty printing of JSON responses is important to be able to understand
large responses from query commands in particular. Unfortunately this
was broken during the addition of the verbose flag in

  commit 1ceca07e48
  Author: John Snow <jsnow@redhat.com>
  Date:   Wed Apr 29 15:14:04 2015 -0400

    scripts: qmp-shell: Add verbose flag

This is because that change turned the python data structure into a
formatted JSON string before the pretty print was given it. So we're
just pretty printing a string, which is a no-op.

The original pretty printer would output python objects.

(QEMU) query-chardev
{   u'return': [   {   u'filename': u'vc',
                       u'frontend-open': False,
                       u'label': u'parallel0'},
                   {   u'filename': u'vc',
                       u'frontend-open': True,
                       u'label': u'serial0'},
                   {   u'filename': u'unix:/tmp/qemp,server',
                       u'frontend-open': True,
                       u'label': u'compat_monitor0'}]}

This fixes the problem by switching to outputting pretty formatted JSON
text instead. This has the added benefit that the pretty printed output
is now valid JSON text. Due to the way the verbose flag was handled, the
pretty printing now applies to the command sent, as well as its response:

(QEMU) query-chardev
{
    "execute": "query-chardev",
    "arguments": {}
}
{
    "return": [
        {
            "frontend-open": false,
            "label": "parallel0",
            "filename": "vc"
        },
        {
            "frontend-open": true,
            "label": "serial0",
            "filename": "vc"
        },
        {
            "frontend-open": true,
            "label": "compat_monitor0",
            "filename": "unix:/tmp/qmp,server"
        }
    ]
}

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Message-Id: <1456224706-1591-1-git-send-email-berrange@redhat.com>
Tested-by: Kashyap Chamarthy <kchamart@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
[Bonus fix: multiple -p now work]
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2016-03-04 17:16:32 +01:00
..
qemu-ga-client scripts/qmp: Use Python 2.6 "except E as ..." syntax 2016-02-08 17:29:54 +01:00
qmp scripts/qmp: Use Python 2.6 "except E as ..." syntax 2016-02-08 17:29:54 +01:00
qmp-shell qmp-shell: fix pretty printing of JSON responses 2016-03-04 17:16:32 +01:00
qmp.py scripts/qmp: Use Python 2.6 "except E as ..." syntax 2016-02-08 17:29:54 +01:00
qom-fuse
qom-get
qom-list
qom-set
qom-tree scripts: Add support for path as argument of qom-tree 2015-06-19 10:29:14 +02:00