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[web_server] Avoid temporary std::string allocations in request parameter parsing (#14366)

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Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
J. Nick Koston
2026-03-02 06:57:39 -10:00
committed by GitHub
co-authored by Claude Opus 4.6
parent 00242443e1
commit 54f410901f
11 changed files with 82 additions and 32 deletions
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esphome/components/web_server/web_server.cpp
+29 -9
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@@ -969,7 +969,9 @@ void WebServer::handle_light_request(AsyncWebServerRequest *request, const UrlMa
parse_light_param_uint_(request, ESPHOME_F("transition"), call, &decltype(call)::set_transition_length, 1000);
if (is_on) {
parse_string_param_(request, ESPHOME_F("effect"), call, &decltype(call)::set_effect);
parse_cstr_param_(
request, ESPHOME_F("effect"), call,
static_cast<light::LightCall &(light::LightCall::*) (const char *, size_t)>(&decltype(call)::set_effect));
}
DEFER_ACTION(call, call.perform());
@@ -1368,7 +1370,9 @@ void WebServer::handle_text_request(AsyncWebServerRequest *request, const UrlMat
}
auto call = obj->make_call();
parse_string_param_(request, ESPHOME_F("value"), call, &decltype(call)::set_value);
parse_cstr_param_(
request, ESPHOME_F("value"), call,
static_cast<text::TextCall &(text::TextCall::*) (const char *, size_t)>(&decltype(call)::set_value));
DEFER_ACTION(call, call.perform());
request->send(200);
@@ -1426,7 +1430,9 @@ void WebServer::handle_select_request(AsyncWebServerRequest *request, const UrlM
}
auto call = obj->make_call();
parse_string_param_(request, ESPHOME_F("option"), call, &decltype(call)::set_option);
parse_cstr_param_(
request, ESPHOME_F("option"), call,
static_cast<select::SelectCall &(select::SelectCall::*) (const char *, size_t)>(&decltype(call)::set_option));
DEFER_ACTION(call, call.perform());
request->send(200);
@@ -1487,10 +1493,18 @@ void WebServer::handle_climate_request(AsyncWebServerRequest *request, const Url
auto call = obj->make_call();
// Parse string mode parameters
parse_string_param_(request, ESPHOME_F("mode"), call, &decltype(call)::set_mode);
parse_string_param_(request, ESPHOME_F("fan_mode"), call, &decltype(call)::set_fan_mode);
parse_string_param_(request, ESPHOME_F("swing_mode"), call, &decltype(call)::set_swing_mode);
parse_string_param_(request, ESPHOME_F("preset"), call, &decltype(call)::set_preset);
parse_cstr_param_(
request, ESPHOME_F("mode"), call,
static_cast<climate::ClimateCall &(climate::ClimateCall::*) (const char *, size_t)>(&decltype(call)::set_mode));
parse_cstr_param_(request, ESPHOME_F("fan_mode"), call,
static_cast<climate::ClimateCall &(climate::ClimateCall::*) (const char *, size_t)>(
&decltype(call)::set_fan_mode));
parse_cstr_param_(request, ESPHOME_F("swing_mode"), call,
static_cast<climate::ClimateCall &(climate::ClimateCall::*) (const char *, size_t)>(
&decltype(call)::set_swing_mode));
parse_cstr_param_(request, ESPHOME_F("preset"), call,
static_cast<climate::ClimateCall &(climate::ClimateCall::*) (const char *, size_t)>(
&decltype(call)::set_preset));
// Parse temperature parameters
// static_cast needed to disambiguate overloaded setters (float vs optional<float>)
@@ -1804,7 +1818,10 @@ void WebServer::handle_alarm_control_panel_request(AsyncWebServerRequest *reques
}
auto call = obj->make_call();
parse_string_param_(request, ESPHOME_F("code"), call, &decltype(call)::set_code);
parse_cstr_param_(
request, ESPHOME_F("code"), call,
static_cast<alarm_control_panel::AlarmControlPanelCall &(
alarm_control_panel::AlarmControlPanelCall::*) (const char *, size_t)>(&decltype(call)::set_code));
// Lookup table for alarm control panel methods
static const struct {
@@ -1892,7 +1909,10 @@ void WebServer::handle_water_heater_request(AsyncWebServerRequest *request, cons
water_heater::WaterHeaterCall &base_call = call;
// Parse mode parameter
parse_string_param_(request, ESPHOME_F("mode"), base_call, &water_heater::WaterHeaterCall::set_mode);
parse_cstr_param_(
request, ESPHOME_F("mode"), base_call,
static_cast<water_heater::WaterHeaterCall &(water_heater::WaterHeaterCall::*) (const char *, size_t)>(
&water_heater::WaterHeaterCall::set_mode));
// Parse temperature parameters
parse_num_param_(request, ESPHOME_F("target_temperature"), base_call,