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90 lines
2.3 KiB
90 lines
2.3 KiB
/*
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PROMETHEUS METRICS MODULE
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Copyright (C) 2020 by Maxim Prokhorov <prokhorov dot max at outlook dot com>
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*/
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#include "espurna.h"
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#if WEB_SUPPORT && PROMETHEUS_SUPPORT
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#include "prometheus.h"
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#include "api.h"
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#include "relay.h"
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#include "sensor.h"
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#include "web.h"
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#include <cmath>
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void _prometheusRequestHandler(AsyncWebServerRequest* request) {
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static_assert((RELAY_SUPPORT) || (SENSOR_SUPPORT), "");
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// TODO: Add more stuff?
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// Note: Response 'stream' backing buffer is customizable. Default is 1460 bytes (see ESPAsyncWebServer.h)
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// In case printf overflows, memory of CurrentSize+N{overflow} will be allocated to replace
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// the existing buffer. Previous buffer will be copied into the new and destroyed after that.
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AsyncResponseStream *response = request->beginResponseStream("text/plain");
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#if RELAY_SUPPORT
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for (unsigned char index = 0; index < relayCount(); ++index) {
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response->printf("relay%u %d\n", index, static_cast<int>(relayStatus(index)));
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}
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#endif
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#if SENSOR_SUPPORT
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char buffer[64] { 0 };
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for (unsigned char index = 0; index < magnitudeCount(); ++index) {
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auto value = magnitudeValue(index);
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if (std::isnan(value.get()) || std::isinf(value.get())) {
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continue;
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}
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String topic(magnitudeTopicIndex(index));
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topic.replace("/", "");
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magnitudeFormat(value, buffer, sizeof(buffer));
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response->printf("%s %s\n", topic.c_str(), buffer);
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}
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#endif
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response->write('\n');
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request->send(response);
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}
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#if API_SUPPORT
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void prometheusSetup() {
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apiRegister(F("metrics"),
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[](ApiRequest& request) {
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request.handle(_prometheusRequestHandler);
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return true;
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},
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nullptr
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);
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}
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#else
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void prometheusSetup() {
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webRequestRegister([](AsyncWebServerRequest* request) {
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if (request->url().equals(F(API_BASE_PATH "metrics"))) {
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if (apiAuthenticate(request)) {
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_prometheusRequestHandler(request);
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return true;
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}
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request->send(403);
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return true;
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}
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return false;
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});
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}
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#endif // API_SUPPORT
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#endif // PROMETHEUS_SUPPORT
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