Trim app and recovery binaries

components/metrics/Batch.cpp

@@ -0,0 +1,124 @@
+#define LOG_LOCAL_LEVEL ESP_LOG_VERBOSE
+#include "Batch.h"
+#include "esp_event.h"
+#include "esp_http_client.h"
+#include "esp_log.h"
+#include "esp_netif.h"
+#include "esp_ota_ops.h"
+#include "esp_tls.h"
+#include "nvs_flash.h"
+#if CONFIG_MBEDTLS_CERTIFICATE_BUNDLE
+#include "esp_crt_bundle.h"
+#endif
+#include "esp_system.h"
+#include "http_handlers.h"
+#include "nvs.h"
+#include "nvs_flash.h"
+#include "nvs_utilities.h"
+#include "tools.h"
+#include <algorithm>
+#include <iomanip>
+#include <sstream>
+#include <string>
+#include <sys/param.h>
+#if CONFIG_WITH_METRICS
+static const char* const TAG = "MetricsBatch";
+static const char* const feature_evt_name = "$feature_flag_called";
+static const char* const feature_flag_name = "$feature_flag";
+static const char* const feature_flag_response_name = "$feature_flag_response";
+
+namespace Metrics {
+
+Event& Batch::add_feature_event() { return add_event(feature_evt_name); }
+void Batch::add_remove_feature_event(const char* name, bool active) {
+    if (!active) {
+        remove_feature_event(name);
+    } else {
+        add_event(feature_evt_name).add_property(feature_flag_name, name);
+    }
+}
+Event& Batch::add_feature_variant_event(const char* const name, const char* const value) {
+    return add_event(feature_evt_name)
+        .add_property(feature_flag_name, name)
+        .add_property(feature_flag_response_name, value);
+}
+void Batch::remove_feature_event(const char* name) {
+    for (Metrics::Event& e : _events) {
+        if (strcmp(e.get_name(), feature_evt_name) == 0) {
+            e.remove_property(feature_flag_name, name);
+            return;
+        }
+    }
+}
+cJSON* Batch::to_json() {
+    cJSON* batch_json = cJSON_CreateArray();
+    for (Metrics::Event& e : _events) {
+        cJSON_AddItemToArray(batch_json, e.to_json(_metrics_uid.c_str()));
+    }
+    cJSON* message = cJSON_CreateObject();
+    cJSON_AddItemToObject(message, "batch", batch_json);
+    cJSON_AddStringToObject(message, "api_key", _api_key);
+    return batch_json;
+}
+char* Batch::to_json_str() {
+    cJSON* json = to_json();
+    char* json_str = cJSON_PrintUnformatted(json);
+    cJSON_Delete(json);
+    return json_str;
+}
+
+void Batch::push() {
+    int status_code = 0;
+    if (_metrics_uid.empty() && !_warned) {
+        ESP_LOGW(TAG, "Metrics disabled; no CID found");
+        _warned = true;
+        return;
+    }
+
+    char* json_str = to_json_str();
+    ESP_LOGV(TAG, "Metrics payload: %s", json_str);
+    time_t start_time = millis();
+
+    status_code = metrics_http_post_request(json_str, _url);
+
+    if (status_code == 200 || status_code == 204) {
+        _events.clear();
+    }
+    FREE_AND_NULL(json_str)
+    ESP_LOGD(TAG, "Total duration for metrics call: %lu. ", millis() - start_time);
+}
+
+void Batch::build_guid() {
+    uint8_t raw[16];
+    std::ostringstream oss;
+    esp_fill_random(raw, 16);
+    std::for_each(std::begin(raw), std::end(raw), [&oss](const uint8_t& byte) {
+        oss << std::hex << std::setw(2) << std::setfill('0') << static_cast<int>(byte);
+    });
+    _metrics_uid = oss.str();
+}
+void Batch::assign_id() {
+    size_t size = 0;
+    esp_err_t esp_err = ESP_OK;
+    _metrics_uid = std::string((char*)get_nvs_value_alloc_for_partition(
+        NVS_DEFAULT_PART_NAME, TAG, NVS_TYPE_BLOB, "cid", &size));
+    if (_metrics_uid[0] == 'G') {
+        ESP_LOGW(TAG, "Invalid ID. %s", _metrics_uid.c_str());
+        _metrics_uid.clear();
+    }
+    if (_metrics_uid.empty()) {
+        build_guid();
+        if (_metrics_uid.empty()) {
+            ESP_LOGE(TAG, "ID Failed");
+            return;
+        }
+        ESP_LOGW(TAG, "Metrics ID: %s", _metrics_uid.c_str());
+        esp_err = store_nvs_value_len_for_partition(NVS_DEFAULT_PART_NAME, TAG, NVS_TYPE_BLOB,
+            "cid", _metrics_uid.c_str(), _metrics_uid.length() + 1);
+        if (esp_err != ESP_OK) {
+            ESP_LOGE(TAG, "Store ID failed: %s", esp_err_to_name(esp_err));
+        }
+    }
+}
+} // namespace Metrics
+#endif

components/metrics/Batch.h

@@ -0,0 +1,46 @@
+#pragma once
+#include "Events.h"
+#include <string>
+#ifdef __cplusplus
+namespace Metrics {
+extern "C" {
+#endif
+
+#ifdef __cplusplus
+
+class Batch {
+  private:
+    std::list<Event> _events;
+    bool _warned = false;
+    std::string _metrics_uid = nullptr;
+    const char* _api_key = nullptr;
+    const char* _url = nullptr;
+    void build_guid();
+    void assign_id();
+
+  public:
+    Batch() = default;
+    void configure(const char* api_key, const char* url) {
+        _api_key = api_key;
+        _url = url;
+        assign_id();
+    }
+    Event& add_feature_event();
+    void add_remove_feature_event(const char* name, bool active);
+    Event& add_feature_variant_event(const char* const name, const char* const value);
+    Event& add_event(const char* name) {
+        _events.emplace_back(name);
+        return _events.back();
+    }
+
+    bool has_events() const { return !_events.empty(); }
+    void remove_feature_event(const char* name);
+    cJSON* to_json();
+    char* to_json_str();
+    void push();
+};
+}
+#endif
+#ifdef __cplusplus
+}
+#endif

components/metrics/CMakeLists.txt

@@ -0,0 +1,5 @@
+idf_component_register(SRC_DIRS .
+						INCLUDE_DIRS .
+						REQUIRES json tools platform_config wifi-manager esp-tls platform_config
+						PRIV_REQUIRES esp32 freertos
+)

components/metrics/Events.cpp

@@ -0,0 +1,98 @@
+#include "Events.h"
+#include <algorithm>
+#include "esp_app_format.h"
+#include "esp_ota_ops.h"
+#if CONFIG_WITH_METRICS
+static const char* const TAG = "MetricsEvent";
+namespace Metrics {
+Event& Event::add_property(const char* name, const char* value) {
+    ESP_LOGV(TAG, "Adding property %s:%s to event %s",name,value,_name);
+    char* mutable_name = strdup_psram(name); // Cast away const-ness, be careful with this
+    auto elem = properties.find(mutable_name);
+    FREE_AND_NULL(mutable_name)
+    if (elem == properties.end()) {
+        ESP_LOGV(TAG, "Adding property %s:%s to event %s",name,value,_name);
+        properties.insert({strdup_psram(name), strdup_psram(value)});
+    } else {
+        ESP_LOGV(TAG, "Replacing value for property %s. Old: %s New: %s, Event: %s",name,elem->second,value,name);
+        FREE_AND_NULL(elem->second)
+        elem->second = strdup_psram(value);
+    }
+    return *this;
+}
+
+bool Event::has_property_value(const char* name, const char* value) const {
+    ESP_LOGV(TAG, "Checking if event %s property %s has value %s",_name, name,value);
+    return std::any_of(properties.begin(), properties.end(),
+        [name, value](const std::pair<const char* const, char*>& kv) {
+            ESP_LOGV(TAG, "Found property %s=%s", name,value);
+            return strcmp(kv.first, name) == 0 && strcmp(kv.second, value) == 0;
+        });
+}
+
+void Event::remove_property(const char* name, const char* value) {
+    auto it = properties.begin();
+    ESP_LOGV(TAG, "Removing event %s property %s=%s",_name, name,value);
+    while (it != properties.end()) {
+        if (strcmp(it->first, name) == 0 && strcmp(it->second, value)) {
+            properties.erase(it);
+            return;
+        }
+    }
+    ESP_LOGV(TAG, "Property %s=%s not found.", name,value);
+}
+cJSON* Event::properties_to_json() {
+    ESP_LOGV(TAG, "Event %s properties to json.",_name);
+    const esp_app_desc_t* desc = esp_ota_get_app_description();
+#ifdef CONFIG_FW_PLATFORM_NAME
+    const char* platform = CONFIG_FW_PLATFORM_NAME;
+#else
+    const char* platform = desc->project_name;
+#endif
+    cJSON* prop_json = cJSON_CreateObject();
+    auto it = properties.begin();
+
+    while (it != properties.end()) {
+        cJSON_AddStringToObject(prop_json, it->first, it->second);
+        ++it;
+    }
+    cJSON_AddStringToObject(prop_json, "platform", platform);
+    cJSON_AddStringToObject(prop_json, "build", desc->version);
+    dump_json_content("User properties for event:", prop_json, ESP_LOG_VERBOSE);
+    return prop_json;
+}
+cJSON* Event::to_json(const char* distinct_id) {
+    // The target structure looks like this
+    //  {
+    //   "event": "batched_event_name_1",
+    //   "properties": {
+    //     "distinct_id": "user distinct id",
+    //     "account_type": "pro"
+    //   },
+    //   "timestamp": "[optional timestamp in ISO 8601 format]"
+    // }
+    ESP_LOGV(TAG,"Event %s to json",_name);
+
+    free_json();
+    _json = cJSON_CreateObject();
+    cJSON_AddStringToObject(_json, "name", _name);
+    cJSON_AddItemToObject(_json, "properties", properties_to_json());
+
+    char buf[26] = {};
+    strftime(buf, sizeof(buf), "%FT%TZ", gmtime(&_time));
+    // this will work too, if your compiler doesn't support %F or %T:
+    // strftime(buf, sizeof buf, "%Y-%m-%dT%H:%M:%SZ", gmtime(&now));
+    cJSON_AddStringToObject(_json, "timestamp", buf);
+    cJSON* prop_json = properties_to_json();
+    cJSON_AddStringToObject(prop_json, "distinct_id", distinct_id);
+    dump_json_content("Full Event:", _json, ESP_LOG_VERBOSE);
+    return _json;
+}
+void Event::free_json() { cJSON_Delete(_json); }
+void Event::update_time() {
+    if (_time == 0) {
+        _time = time(nullptr);
+    }
+}
+} // namespace Metrics
+#endif

components/metrics/Events.h

@@ -0,0 +1,53 @@
+#pragma once
+
+#ifdef __cplusplus
+#include "esp_log.h"
+#include "tools.h"
+#include <cJSON.h>
+#include <ctime>
+#include <list>
+#include <map>
+#include <stdio.h>
+#include <string.h>
+#include <string>
+
+namespace Metrics {
+struct StrCompare {
+    bool operator()(const char* a, const char* b) const { return strcmp(a, b) < 0; }
+};
+
+class Event {
+
+  public:
+    std::map<char*, char*, StrCompare> properties;
+    Event& add_property(const char* name, const char* value);
+    bool has_property_value(const char* name, const char* value) const;
+    void remove_property(const char* name, const char* value);
+    cJSON* properties_to_json();
+    cJSON* to_json(const char* distinct_id);
+    void free_json();
+    void update_time();
+    explicit Event(const char* name) {
+        _name = strdup_psram(name);
+        memset(&_time, 0x00, sizeof(_time));
+    }
+    const char* get_name() const { return _name; }
+    ~Event() {
+        FREE_AND_NULL(_name);
+
+        // Iterate through the map and free the elements
+        for (auto& kv : properties) {
+            free((void*)kv.first);
+            free(kv.second);
+        }
+        properties.clear(); // Clear the map after freeing memory
+        FREE_AND_NULL(_json);
+    }
+  private:
+    char* _name = nullptr;
+    time_t _time;
+    cJSON* _json = nullptr;    
+};
+
+} // namespace Metrics
+#endif

components/metrics/Metrics.cpp

@@ -0,0 +1,148 @@
+#define LOG_LOCAL_LEVEL ESP_LOG_VERBOSE
+#include "Metrics.h"
+#include "Batch.h"
+#include "esp_event.h"
+#include "esp_log.h"
+#include "esp_netif.h"
+#include "esp_ota_ops.h"
+#include "esp_system.h"
+#include "esp_tls.h"
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "nvs_flash.h"
+#include "tools.h"
+#include <cstdarg>
+#include <cstdio>
+#include <ctype.h>
+#include <stdlib.h>
+#include <string.h>
+#include <vector>
+
+#include "cJSON.h"
+#include "freertos/timers.h"
+#include "network_manager.h"
+#include "platform_config.h"
+
+static const char* TAG = "metrics";
+
+#if CONFIG_WITH_METRICS
+extern bool is_network_connected();
+#define METRICS_CLIENT_ID_LEN 50
+#define MAX_HTTP_RECV_BUFFER 512
+
+static bool metrics_usage_gen = false;
+static time_t metrics_usage_gen_time = 0;
+#ifndef METRICS_API_KEY
+    #pragma message "Metrics API key needs to be passed from the environment"
+    #define METRICS_API_KEY "ZZZ"
+#endif
+static const char* metrics_api_key = 
+static const char* parms_str = "params";
+static const char* properties_str = "properties";
+static const char* user_properties_str = "user_properties";
+static const char* items_str = "items";
+static const char* quantity_str = "quantity";
+static const char* metrics_url = "https://app.posthog.com";
+static TimerHandle_t timer;
+extern cJSON* get_cmd_list();
+Metrics::Batch batch;
+
+static void metrics_timer_cb(void* timer_id) {
+    if (batch.has_events()) {
+        if (!is_network_connected()) {
+            ESP_LOGV(TAG, "Network not connected. can't flush");
+        } else {
+            ESP_LOGV(TAG, "Pushing events");
+            batch.push();
+        }
+    }
+    if (millis() > metrics_usage_gen_time && !metrics_usage_gen) {
+        metrics_usage_gen = true;
+        ESP_LOGV(TAG, "Generate command list to pull features");
+        cJSON* cmdlist = get_cmd_list();
+        dump_json_content("generated cmd list", cmdlist, ESP_LOG_VERBOSE);
+        cJSON_Delete(cmdlist);
+    }
+}
+void metrics_init() {
+    ESP_LOGV(TAG, "Initializing metrics");
+    batch.configure(metrics_api_key, metrics_url);
+    if (!timer) {
+        ESP_LOGE(TAG, "Metrics Timer failure");
+    } else {
+        ESP_LOGV(TAG, "Starting timer");
+        xTimerStart(timer, portMAX_DELAY);
+    }
+    // set a 20 seconds delay before generating the
+    // features so the system has time to boot
+    metrics_usage_gen_time = millis() + 20000;
+}
+
+void metrics_event_playback(const char* source) {
+    ESP_LOGV(TAG, "Playback event: %s", source);
+    auto event = batch.add_event("play").add_property("source", source);
+}
+void metrics_event_boot(const char* partition) {
+    ESP_LOGV(TAG, "Boot event %s", partition);
+    auto event = batch.add_event("start");
+    event.add_property("partition", partition);
+}
+void metrics_add_feature_variant(const char* name, const char* format, ...) {
+    va_list args;
+    ESP_LOGV(TAG, "Feature %s", name);
+    va_start(args, format);
+
+    // Determine the required buffer size
+    int size = vsnprintf(nullptr, 0, format, args);
+    va_end(args); // Reset the va_list
+
+    // Allocate buffer and format the string
+    std::vector<char> buffer(size + 1); // +1 for the null-terminator
+    va_start(args, format);
+    vsnprintf(buffer.data(), buffer.size(), format, args);
+    va_end(args);
+
+    // Now buffer.data() contains the formatted string
+    batch.add_feature_variant_event(name, buffer.data());
+}
+void metrics_add_feature(const char* name, bool active) {
+    ESP_LOGV(TAG, "Adding feature %s: %s", name, active ? "ACTIVE" : "INACTIVE");
+    batch.add_remove_feature_event(name, active);
+}
+void metrics_event(const char* name) {
+    ESP_LOGV(TAG, "Adding Event %s", name);
+    batch.add_event(name);
+}
+#else
+static const char * not_enabled =  " - (metrics not enabled, this is just marking where the call happens)";
+void metrics_init(){
+#pragma message("Metrics disabled")
+    ESP_LOGD(TAG,"Metrics init%s",not_enabled);
+}
+void metrics_event_boot(const char* partition){
+    ESP_LOGD(TAG,"Metrics Event Boot from partition %s%s",partition,not_enabled);
+}
+void metrics_event(const char* name){
+    ESP_LOGD(TAG,"Metrics Event %s%s",name,not_enabled);
+}
+void metrics_add_feature(const char* name, bool active) {
+    ESP_LOGD(TAG,"Metrics add feature %s%s%s",name,active?"ACTIVE":"INACTIVE",not_enabled);
+}
+void metrics_add_feature_variant(const char* name, const char* format, ...){
+    va_list args;
+    ESP_LOGV(TAG, "Feature %s", name);
+    va_start(args, format);
+
+    // Determine the required buffer size
+    int size = vsnprintf(nullptr, 0, format, args);
+    va_end(args); // Reset the va_list
+
+    // Allocate buffer and format the string
+    std::vector<char> buffer(size + 1); // +1 for the null-terminator
+    va_start(args, format);
+    vsnprintf(buffer.data(), buffer.size(), format, args);
+    va_end(args);
+
+    ESP_LOGD(TAG,"Metrics add feature %s variant %s%s",name,buffer.data(),not_enabled);
+}
+#endif

components/metrics/Metrics.h

@@ -0,0 +1,18 @@
+#pragma once
+#include <stdbool.h>
+#include <stdlib.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+void metrics_event_playback(const char* source);
+void metrics_event_boot(const char* partition);
+void metrics_event(const char* name);
+void metrics_add_feature(const char* name, bool active);
+void metrics_add_feature_variant(const char* name, const char* format, ...);
+void metrics_init();
+void metrics_flush();
+
+#ifdef __cplusplus
+}
+#endif

components/metrics/http_handlers.c

@@ -0,0 +1,163 @@
+#include "http_handlers.h"
+#include "esp_http_client.h"
+#include "esp_log.h"
+#include "esp_tls.h"
+#include "tools.h"
+#include <sys/param.h>
+#if CONFIG_WITH_METRICS
+static const char* TAG = "metrics_http";
+static char* output_buffer; // Buffer to store response of http request from
+                            // event handler
+static int output_len = 0;  // Stores number of bytes read
+#define MAX_HTTP_OUTPUT_BUFFER 2048
+// Common function signature for event handlers
+typedef void (*HttpEventHandler)(esp_http_client_event_t* evt);
+
+static void handle_http_error(esp_http_client_event_t* evt) { ESP_LOGV(TAG, "ERROR"); }
+
+static void handle_http_connected(esp_http_client_event_t* evt) {
+    ESP_LOGV(TAG, "ON_CONNECTED");
+}
+
+static void handle_http_header_sent(esp_http_client_event_t* evt) {
+    ESP_LOGV(TAG, "HEADER_SENT");
+}
+
+static void handle_http_on_header(esp_http_client_event_t* evt) {
+    ESP_LOGV(TAG, "ON_HEADER, key=%s, value=%s", evt->header_key, evt->header_value);
+}
+
+static void handle_http_on_data(esp_http_client_event_t* evt) {
+    ESP_LOGV(TAG, "ON_DATA, len=%d", evt->data_len);
+    ESP_LOGV(TAG, "ON_DATA, len=%d", evt->data_len);
+    // Clean the buffer in case of a new request
+    if (output_len == 0 && evt->user_data) {
+        // we are just starting to copy the output data into the use
+        ESP_LOGV(TAG, "Resetting buffer");
+        memset(evt->user_data, 0, MAX_HTTP_OUTPUT_BUFFER);
+    }
+    /*
+     *  Check for chunked encoding is added as the URL for chunked encoding used in this example
+     * returns binary data. However, event handler can also be used in case chunked encoding is
+     * used.
+     */
+
+    // If user_data buffer is configured, copy the response into the buffer
+    int copy_len = 0;
+    if (evt->user_data) {
+        ESP_LOGV(TAG, "Not Chunked response, with user data");
+        // The last byte in evt->user_data is kept for the NULL character in
+        // case of out-of-bound access.
+        copy_len = MIN(evt->data_len, (MAX_HTTP_OUTPUT_BUFFER - output_len));
+        if (copy_len) {
+            memcpy(evt->user_data + output_len, evt->data, copy_len);
+        }
+    } else {
+        int content_len = esp_http_client_get_content_length(evt->client);
+        if (esp_http_client_is_chunked_response(evt->client)) {
+            esp_http_client_get_chunk_length(evt->client, &content_len);
+        } 
+
+        if (output_buffer == NULL) {
+            // We initialize output_buffer with 0 because it is used by
+            // strlen() and similar functions therefore should be null
+            // terminated.
+            size_t len=(content_len + 1) * sizeof(char);
+            ESP_LOGV(TAG, "Init buffer %d",len);
+            output_buffer = (char*)malloc_init_external(len);
+            output_len = 0;
+            if (output_buffer == NULL) {
+                ESP_LOGE(TAG, "Buffer alloc failed.");
+                return;
+            }
+        }
+        copy_len = MIN(evt->data_len, (content_len - output_len));
+        if (copy_len) {
+            memcpy(output_buffer + output_len, evt->data, copy_len);
+        }
+    }
+    output_len += copy_len;
+}
+
+static void handle_http_on_finish(esp_http_client_event_t* evt) {
+    ESP_LOGD(TAG, "ON_FINISH");
+    if (output_buffer != NULL) {
+        ESP_LOGV(TAG, "Response: %s", output_buffer);
+        free(output_buffer);
+        output_buffer = NULL;
+    }
+    output_len = 0;
+}
+static void handle_http_disconnected(esp_http_client_event_t* evt) {
+    ESP_LOGI(TAG, "DISCONNECTED");
+    int mbedtls_err = 0;
+    esp_err_t err =
+        esp_tls_get_and_clear_last_error((esp_tls_error_handle_t)evt->data, &mbedtls_err, NULL);
+    if (err != 0) {
+        ESP_LOGI(TAG, "Last error : %s", esp_err_to_name(err));
+        ESP_LOGI(TAG, "Last mbedtls err 0x%x", mbedtls_err);
+    }
+    if (output_buffer != NULL) {
+        free(output_buffer);
+        output_buffer = NULL;
+    }
+    output_len = 0;
+}
+static const HttpEventHandler eventHandlers[] = {
+    handle_http_error,       // HTTP_EVENT_ERROR
+    handle_http_connected,   // HTTP_EVENT_ON_CONNECTED
+    handle_http_header_sent, // HTTP_EVENT_HEADERS_SENT
+    handle_http_header_sent, // HTTP_EVENT_HEADER_SENT (alias for HTTP_EVENT_HEADERS_SENT)
+    handle_http_on_header,   // HTTP_EVENT_ON_HEADER
+    handle_http_on_data,     // HTTP_EVENT_ON_DATA
+    handle_http_on_finish,   // HTTP_EVENT_ON_FINISH
+    handle_http_disconnected // HTTP_EVENT_DISCONNECTED
+};
+esp_err_t metrics_http_event_handler(esp_http_client_event_t* evt) {
+
+    if (evt->event_id < 0 || evt->event_id >= sizeof(eventHandlers) / sizeof(eventHandlers[0])) {
+        ESP_LOGE(TAG, "Invalid event ID: %d", evt->event_id);
+        return ESP_FAIL;
+    }
+
+    eventHandlers[evt->event_id](evt);
+
+    return ESP_OK;
+}
+int metrics_http_post_request(const char* payload, const char* url) {
+    int status_code = 0;
+    esp_http_client_config_t config = {.url = url,
+        .disable_auto_redirect = false,
+        .event_handler = metrics_http_event_handler,
+        .transport_type = HTTP_TRANSPORT_OVER_SSL,
+        .user_data = NULL, // local_response_buffer,        // Pass address of
+                           // local buffer to get response
+        .skip_cert_common_name_check = true
+
+    };
+    esp_http_client_handle_t client = esp_http_client_init(&config);
+    esp_err_t err = esp_http_client_set_method(client, HTTP_METHOD_POST);
+
+    if (err == ESP_OK) {
+        err = esp_http_client_set_header(client, "Content-Type", "application/json");
+    }
+    if (err == ESP_OK) {
+        ESP_LOGV(TAG, "Setting payload: %s", payload);
+        err = esp_http_client_set_post_field(client, payload, strlen(payload));
+    }
+    if (err == ESP_OK) {
+        err = esp_http_client_perform(client);
+    }
+    if (err == ESP_OK) {
+        status_code = esp_http_client_get_status_code(client);
+        ESP_LOGD(TAG, "metrics call Status = %d, content_length = %d",
+            esp_http_client_get_status_code(client), esp_http_client_get_content_length(client));
+
+    } else {
+        status_code = 500;
+        ESP_LOGW(TAG, "metrics call Status failed: %s", esp_err_to_name(err));
+    }
+    esp_http_client_cleanup(client);
+    return status_code;
+}
+#endif

components/metrics/http_handlers.h

@@ -0,0 +1,11 @@
+#pragma once
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+int metrics_http_post_request(const char* payload, const char* url);
+
+#ifdef __cplusplus
+}
+#endif