Re: [PATCH v2 12/13] block/ssh: Use URI parsing code from glib

[Eric Blake]

On Fri, Apr 12, 2024 at 03:24:14PM +0200, Thomas Huth wrote:
> Since version 2.66, glib has useful URI parsing functions, too.
> Use those instead of the QEMU-internal ones to be finally able
> to get rid of the latter.
> 
> Reviewed-by: Richard W.M. Jones <rjones@redhat.com>
> Signed-off-by: Thomas Huth <thuth@redhat.com>
> ---
>  block/ssh.c | 75 ++++++++++++++++++++++++++++-------------------------
>  1 file changed, 40 insertions(+), 35 deletions(-)
> 

>  
> -    if (g_strcmp0(uri->scheme, "ssh") != 0) {
> +    if (g_strcmp0(g_uri_get_scheme(uri), "ssh") != 0) {

Yet another case-sensitive spot to consider.

>  
> -    qdict_put_str(options, "path", uri->path);
> -
> -    /* Pick out any query parameters that we understand, and ignore
> -     * the rest.
> -     */
> -    for (i = 0; i < qp->n; ++i) {
> -        if (strcmp(qp->p[i].name, "host_key_check") == 0) {
> -            qdict_put_str(options, "host_key_check", qp->p[i].value);
> +    qdict_put_str(options, "path", uri_path);
> +
> +    uri_query = g_uri_get_query(uri);
> +    if (uri_query) {
> +        g_uri_params_iter_init(&qp, uri_query, -1, "&", G_URI_PARAMS_NONE);
> +        while (g_uri_params_iter_next(&qp, &qp_name, &qp_value, &gerror)) {
> +            if (!qp_name || !qp_value || gerror) {
> +                warn_report("Failed to parse SSH URI parameters '%s'.",
> +                            uri_query);
> +                break;
> +            }
> +            /*
> +             * Pick out the query parameters that we understand, and ignore
> +             * (or rather warn about) the rest.
> +             */
> +            if (g_str_equal(qp_name, "host_key_check")) {
> +                qdict_put_str(options, "host_key_check", qp_value);
> +            } else {
> +                warn_report("Unsupported parameter '%s' in URI.", qp_name);

Do we want the trailing '.' in warn_report?

The warning is new; it was not in the old code, nor mentioned in the
commit message.  It seems like a good idea, but we should be more
intentional if we intend to make that change.

-- 
Eric Blake, Principal Software Engineer
Red Hat, Inc.
Virtualization:  qemu.org | libguestfs.org