latest code

Signed-off-by: Peter Siegmund <peter@rdkr.com>

ePaper-ESP-IDF/components/connectivity/networking.c

@@ -0,0 +1,81 @@
+#include "networking.h"
+
+#include <string.h>
+#include "cJSON.h"
+#include "esp_err.h"
+#include "esp_http_client.h"
+#include "esp_log.h"
+
+static const char* TAG = "JSON";
+
+esp_err_t download_and_parse_json(const char* url) {
+  // 1. Create HTTP Client
+  esp_http_client_config_t config = {
+      .url = url,
+      .event_handler = NULL,  // You can add an event handler for more control
+  };
+  esp_http_client_handle_t client = esp_http_client_init(&config);
+  if (client == NULL) {
+    ESP_LOGE(TAG, "Failed to create HTTP client");
+    return ESP_FAIL;
+  }
+
+  // 2. Perform GET request
+  esp_err_t err = esp_http_client_perform(client);
+  if (err != ESP_OK) {
+    ESP_LOGE(TAG, "HTTP GET request failed: %s", esp_err_to_name(err));
+    esp_http_client_cleanup(client);
+    return err;
+  }
+
+  // 3. Check response status code
+  int status_code = esp_http_client_get_status_code(client);
+  if (status_code != 200) {
+    ESP_LOGE(TAG, "HTTP GET request failed with status code: %d", status_code);
+    esp_http_client_cleanup(client);
+    return ESP_FAIL;
+  }
+
+  // 4. Read response content
+  int content_length = esp_http_client_get_content_length(client);
+  char* response_buffer = malloc(content_length + 1);
+  if (response_buffer == NULL) {
+    ESP_LOGE(TAG, "Failed to allocate memory for response buffer");
+    esp_http_client_cleanup(client);
+    return ESP_FAIL;
+  }
+  int data_read = esp_http_client_read_response(client, response_buffer, content_length);
+  if (data_read != content_length) {
+    ESP_LOGE(TAG, "Failed to read complete response");
+    free(response_buffer);
+    esp_http_client_cleanup(client);
+    return ESP_FAIL;
+  }
+  response_buffer[data_read] = '\0';  // Null-terminate the string
+
+  // 5. Parse JSON
+  cJSON* root = cJSON_Parse(response_buffer);
+  if (root == NULL) {
+    const char* error_ptr = cJSON_GetErrorPtr();
+    if (error_ptr != NULL) {
+      ESP_LOGE(TAG, "Error before: %s", error_ptr);
+    }
+    free(response_buffer);
+    esp_http_client_cleanup(client);
+    return ESP_FAIL;
+  }
+
+  // 6. Access JSON data
+  // Example: Print the value of a key called "message"
+  cJSON* message_item = cJSON_GetObjectItem(root, "message");
+  if (cJSON_IsString(message_item) && (message_item->valuestring != NULL)) {
+    ESP_LOGI(TAG, "Message: %s", message_item->valuestring);
+  }
+
+  // 7. Clean up
+  cJSON_Delete(root);
+  free(response_buffer);
+  esp_http_client_cleanup(client);
+
+  return ESP_OK;
+}