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287 lines
8.9 KiB
287 lines
8.9 KiB
/*
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INFLUXDB MODULE
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Copyright (C) 2017-2019 by Xose Pérez <xose dot perez at gmail dot com>
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*/
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#include "influxdb.h"
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#if INFLUXDB_SUPPORT
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#include <map>
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#include <memory>
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#include "broker.h"
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#include "rpc.h"
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#include "sensor.h"
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#include "terminal.h"
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#include "ws.h"
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#include "libs/AsyncClientHelpers.h"
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const char InfluxDb_http_success[] = "HTTP/1.1 204";
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const char InfluxDb_http_template[] PROGMEM = "POST /write?db=%s&u=%s&p=%s HTTP/1.1\r\nHost: %s:%u\r\nContent-Length: %d\r\n\r\n";
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class AsyncInfluxDB : public AsyncClient {
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public:
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constexpr static const unsigned long ClientTimeout = 5000;
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constexpr static const size_t DataBufferSize = 256;
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AsyncClientState state = AsyncClientState::Disconnected;
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String host;
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uint16_t port = 0;
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std::map<String, String> values;
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String payload;
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bool flush = false;
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uint32_t timestamp = 0;
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};
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bool _idb_enabled = false;
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std::unique_ptr<AsyncInfluxDB> _idb_client = nullptr;
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// -----------------------------------------------------------------------------
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void _idbInitClient() {
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_idb_client = std::make_unique<AsyncInfluxDB>();
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_idb_client->payload.reserve(AsyncInfluxDB::DataBufferSize);
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_idb_client->onDisconnect([](void * s, AsyncClient * ptr) {
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auto *client = reinterpret_cast<AsyncInfluxDB*>(ptr);
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DEBUG_MSG_P(PSTR("[INFLUXDB] Disconnected\n"));
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client->flush = false;
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client->payload = "";
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client->timestamp = 0;
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client->state = AsyncClientState::Disconnected;
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}, nullptr);
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_idb_client->onTimeout([](void * s, AsyncClient * client, uint32_t time) {
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DEBUG_MSG_P(PSTR("[INFLUXDB] Network timeout after %ums\n"), time);
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client->close(true);
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}, nullptr);
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_idb_client->onData([](void * arg, AsyncClient * ptr, void * response, size_t len) {
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// ref: https://docs.influxdata.com/influxdb/v1.7/tools/api/#summary-table-1
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auto *client = reinterpret_cast<AsyncInfluxDB*>(ptr);
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if (client->state == AsyncClientState::Connected) {
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client->state = AsyncClientState::Disconnecting;
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const bool result = (len > sizeof(InfluxDb_http_success) && (0 == strncmp((char*) response, InfluxDb_http_success, strlen(InfluxDb_http_success))));
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DEBUG_MSG_P(PSTR("[INFLUXDB] %s response after %ums\n"), result ? "Success" : "Failure", millis() - client->timestamp);
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client->timestamp = millis();
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client->close();
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}
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}, nullptr);
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_idb_client->onPoll([](void * arg, AsyncClient * ptr) {
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auto *client = reinterpret_cast<AsyncInfluxDB*>(ptr);
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unsigned long ts = millis() - client->timestamp;
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if (ts > AsyncInfluxDB::ClientTimeout) {
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DEBUG_MSG_P(PSTR("[INFLUXDB] No response after %ums\n"), ts);
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client->close(true);
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return;
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}
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if (client->payload.length()) {
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client->write(client->payload.c_str(), client->payload.length());
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client->payload = "";
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}
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});
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_idb_client->onConnect([](void * arg, AsyncClient * ptr) {
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auto *client = reinterpret_cast<AsyncInfluxDB*>(ptr);
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client->timestamp = millis();
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client->state = AsyncClientState::Connected;
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DEBUG_MSG_P(PSTR("[INFLUXDB] Connected to %s:%u\n"),
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IPAddress(client->getRemoteAddress()).toString().c_str(),
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client->getRemotePort()
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);
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constexpr const int BUFFER_SIZE = 256;
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char headers[BUFFER_SIZE];
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int len = snprintf_P(headers, sizeof(headers), InfluxDb_http_template,
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getSetting("idbDatabase", INFLUXDB_DATABASE).c_str(),
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getSetting("idbUsername", INFLUXDB_USERNAME).c_str(),
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getSetting("idbPassword", INFLUXDB_PASSWORD).c_str(),
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client->host.c_str(), client->port, client->payload.length()
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);
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if ((len < 0) || (len > BUFFER_SIZE - 1)) {
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client->close(true);
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return;
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}
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client->write(headers, len);
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});
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}
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// -----------------------------------------------------------------------------
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bool _idbWebSocketOnKeyCheck(const char * key, JsonVariant& value) {
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return (strncmp(key, "idb", 3) == 0);
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}
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void _idbWebSocketOnVisible(JsonObject& root) {
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root["idbVisible"] = 1;
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}
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void _idbWebSocketOnConnected(JsonObject& root) {
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root["idbEnabled"] = getSetting("idbEnabled", 1 == INFLUXDB_ENABLED);
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root["idbHost"] = getSetting("idbHost", INFLUXDB_HOST);
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root["idbPort"] = getSetting("idbPort", INFLUXDB_PORT);
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root["idbDatabase"] = getSetting("idbDatabase", INFLUXDB_DATABASE);
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root["idbUsername"] = getSetting("idbUsername", INFLUXDB_USERNAME);
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root["idbPassword"] = getSetting("idbPassword", INFLUXDB_PASSWORD);
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}
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void _idbConfigure() {
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_idb_enabled = getSetting("idbEnabled", 1 == INFLUXDB_ENABLED);
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if (_idb_enabled && (getSetting("idbHost", INFLUXDB_HOST).length() == 0)) {
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_idb_enabled = false;
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setSetting("idbEnabled", 0);
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}
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if (_idb_enabled && !_idb_client) _idbInitClient();
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}
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void _idbBrokerSensor(const String& topic, unsigned char id, double, const char* value) {
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idbSend(topic.c_str(), id, value);
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}
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void _idbBrokerStatus(const String& topic, unsigned char id, unsigned int value) {
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idbSend(topic.c_str(), id, String(int(value)).c_str());
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}
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// -----------------------------------------------------------------------------
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bool idbSend(const char * topic, const char * payload) {
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if (!_idb_enabled) return false;
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if (_idb_client->state != AsyncClientState::Disconnected) return false;
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_idb_client->values[topic] = payload;
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_idb_client->flush = true;
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return true;
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}
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void _idbSend(const String& host, const uint16_t port) {
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if (_idb_client->state != AsyncClientState::Disconnected) return;
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DEBUG_MSG_P(PSTR("[INFLUXDB] Sending to %s:%u\n"), host.c_str(), port);
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// TODO: cache `Host: <host>:<port>` header instead of storing things separately?
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_idb_client->host = host;
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_idb_client->port = port;
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_idb_client->timestamp = millis();
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_idb_client->state = _idb_client->connect(host.c_str(), port)
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? AsyncClientState::Connecting
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: AsyncClientState::Disconnected;
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if (_idb_client->state == AsyncClientState::Disconnected) {
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DEBUG_MSG_P(PSTR("[INFLUXDB] Connection to %s:%u failed\n"), host.c_str(), port);
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_idb_client->close(true);
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}
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}
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void _idbFlush() {
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// Clean-up client object when not in use
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if (_idb_client && !_idb_enabled && (_idb_client->state == AsyncClientState::Disconnected)) {
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_idb_client = nullptr;
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}
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// Wait until current connection is finished
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if (!_idb_client) return;
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if (!_idb_client->flush) return;
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if (_idb_client->state != AsyncClientState::Disconnected) return;
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// Wait until connected
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if (!wifiConnected()) return;
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const auto host = getSetting("idbHost", INFLUXDB_HOST);
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const auto port = getSetting("idbPort", static_cast<uint16_t>(INFLUXDB_PORT));
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// TODO: should we always store specific pairs like tspk keeps relay / sensor readings?
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// note that we also send heartbeat data, persistent values should be flagged
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const String device = getSetting("hostname");
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_idb_client->payload = "";
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for (auto& pair : _idb_client->values) {
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if (!isNumber(pair.second.c_str())) {
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String quoted;
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quoted.reserve(pair.second.length() + 2);
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quoted += '"';
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quoted += pair.second;
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quoted += '"';
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pair.second = quoted;
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}
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char buffer[128] = {0};
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snprintf_P(buffer, sizeof(buffer),
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PSTR("%s,device=%s value=%s\n"),
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pair.first.c_str(), device.c_str(), pair.second.c_str()
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);
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_idb_client->payload += buffer;
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}
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_idb_client->values.clear();
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_idbSend(host, port);
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}
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bool idbSend(const char * topic, unsigned char id, const char * payload) {
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char measurement[64];
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snprintf(measurement, sizeof(measurement), "%s,id=%d", topic, id);
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return idbSend(measurement, payload);
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}
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bool idbEnabled() {
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return _idb_enabled;
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}
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void idbSetup() {
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_idbConfigure();
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#if WEB_SUPPORT
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wsRegister()
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.onVisible(_idbWebSocketOnVisible)
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.onConnected(_idbWebSocketOnConnected)
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.onKeyCheck(_idbWebSocketOnKeyCheck);
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#endif
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StatusBroker::Register(_idbBrokerStatus);
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#if SENSOR_SUPPORT
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SensorReportBroker::Register(_idbBrokerSensor);
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#endif
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espurnaRegisterReload(_idbConfigure);
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espurnaRegisterLoop(_idbFlush);
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#if TERMINAL_SUPPORT
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terminalRegisterCommand(F("IDB.SEND"), [](Embedis* e) {
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if (e->argc != 4) {
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terminalError(F("idb.send <topic> <id> <value>"));
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return;
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}
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const String topic = e->argv[1];
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const auto id = atoi(e->argv[2]);
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const String value = e->argv[3];
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idbSend(topic.c_str(), id, value.c_str());
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});
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#endif
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}
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#endif
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