github/esphome
2
0
Fork 0
mirror of https://github.com/esphome/esphome.git synced 2026-09-14 08:38:39 +00:00
Code Issues Packages Projects Releases Wiki Activity

[ble_scanner] Escape special characters in JSON output (#14664)

Browse Source 
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
Jonathan Swoboda
2026-03-09 17:59:36 -04:00
committed by GitHub
co-authored by Claude Opus 4.6
parent 470d9160a5
commit 308e8e78cd
1 changed files with 19 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files
esphome/components/ble_scanner/ble_scanner.h
+19 -4
View File
@@ -16,12 +16,27 @@ namespace ble_scanner {
class BLEScanner : public text_sensor::TextSensor, public esp32_ble_tracker::ESPBTDeviceListener, public Component {
public:
bool parse_device(const esp32_ble_tracker::ESPBTDevice &device) override {
// Format JSON using stack buffer to avoid heap allocations from string concatenation
char buf[128];
char addr_buf[MAC_ADDRESS_PRETTY_BUFFER_SIZE];
// Escape special characters in the device name for valid JSON
const char *name = device.get_name().c_str();
char escaped_name[128];
size_t pos = 0;
for (; *name != '\0' && pos < sizeof(escaped_name) - 7; name++) {
uint8_t c = static_cast<uint8_t>(*name);
if (c == '"' || c == '\\') {
escaped_name[pos++] = '\\';
escaped_name[pos++] = c;
} else if (c < 0x20) {
pos += snprintf(escaped_name + pos, sizeof(escaped_name) - pos, "\\u%04x", c);
} else {
escaped_name[pos++] = c;
}
}
escaped_name[pos] = '\0';
char buf[256];
snprintf(buf, sizeof(buf), "{\"timestamp\":%" PRId64 ",\"address\":\"%s\",\"rssi\":%d,\"name\":\"%s\"}",
static_cast<int64_t>(::time(nullptr)), device.address_str_to(addr_buf), device.get_rssi(),
device.get_name().c_str());
static_cast<int64_t>(::time(nullptr)), device.address_str_to(addr_buf), device.get_rssi(), escaped_name);
this->publish_state(buf);
return true;
}