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JSON: use the json builder instead of memstream and fprintf

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Use the JSON builder to prepare arguments for modules and metadata
instead of custom memopen and fprintf. This makes it easier to ensure
the strings are all properly escaped.

This removes the use of spa_json_encode_string(), which could return a
truncated, non-zero terminated result, which we needed to check
everywhere.
This commit is contained in:
Wim Taymans 2026-04-30 13:23:23 +02:00
parent 4ddedc72cd
commit 96c3ada6f2
38 changed files with 661 additions and 528 deletions
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14
src/modules/module-jackdbus-detect.c
View file

@ -17,6 +17,7 @@
#include <spa/utils/string.h>
#include <spa/utils/result.h>
#include <spa/utils/json-builder.h>
#include <spa/support/dbus.h>
#include <spa-private/dbus-helpers.h>
@ -116,22 +117,21 @@ static const struct pw_impl_module_events tunnelmodule_events = {
static int load_jack_tunnel(struct impl *impl)
{
FILE *f;
struct spa_json_builder b;
char *args;
size_t size;
int res = 0;
if ((f = open_memstream(&args, &size)) == NULL) {
res = -errno;
if ((res = spa_json_builder_memstream(&b, &args, &size, 0)) < 0) {
pw_log_error("Can't open memstream: %m");
goto done;
}
fprintf(f, "{");
spa_json_builder_array_push(&b, "{");
if (impl->properties != NULL)
pw_properties_serialize_dict(f, &impl->properties->dict, 0);
fprintf(f, " }");
fclose(f);
pw_properties_serialize_dict(b.f, &impl->properties->dict, 0);
spa_json_builder_pop(&b, "}");
spa_json_builder_close(&b);
pw_log_info("loading module args:'%s'", args);
impl->jack_tunnel = pw_context_load_module(impl->context,