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@@ -11,7 +11,11 @@
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#include <stdint.h>
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#include <string.h>
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#include <ctype.h>
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+#include "freertos/FreeRTOS.h"
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+#include "freertos/task.h"
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#include "tools.h"
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+#include "esp_tls.h"
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+#include "esp_http_client.h"
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#include "esp_heap_caps.h"
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#include "esp_log.h"
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@@ -171,3 +175,104 @@ char * strdup_psram(const char * source){
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}
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return ptr;
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}
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+
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+/****************************************************************************************
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+ * URL download
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+ */
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+
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+typedef struct {
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+ void *user_context;
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+ http_download_cb_t callback;
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+ size_t max, bytes;
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+ bool abort;
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+ uint8_t *data;
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+ char *url;
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+} http_context_t;
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+
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+static void http_downloader(void *arg);
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+static esp_err_t http_event_handler(esp_http_client_event_t *evt);
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+
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+void http_download(char *url, size_t max, http_download_cb_t callback, void *context) {
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+ http_context_t *http_context = (http_context_t*) heap_caps_calloc(sizeof(http_context_t), 1, MALLOC_CAP_SPIRAM);
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+
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+ http_context->callback = callback;
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+ http_context->user_context = context;
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+ http_context->max = max;
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+ http_context->url = strdup(url);
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+
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+ xTaskCreate(http_downloader, "downloader", 4*1024, http_context, ESP_TASK_PRIO_MIN + 1, NULL);
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+}
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+
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+static void http_downloader(void *arg) {
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+ http_context_t *http_context = (http_context_t*) arg;
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+ esp_http_client_config_t config = {
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+ .url = http_context->url,
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+ .event_handler = http_event_handler,
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+ .user_data = http_context,
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+ //.cert_pem = howsmyssl_com_root_cert_pem_start,
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+ //.skip_cert_common_name_check = true,
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+ };
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+
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+ esp_http_client_handle_t client = esp_http_client_init(&config);
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+ esp_http_client_perform(client);
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+// esp_http_client_cleanup(client);
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+
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+ free(http_context->url);
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+ free(http_context);
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+
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+ vTaskDelete(NULL);
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+}
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+
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+static esp_err_t http_event_handler(esp_http_client_event_t *evt) {
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+ http_context_t *http_context = (http_context_t*) evt->user_data;
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+
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+ if (http_context->abort) return ESP_FAIL;
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+
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+ switch(evt->event_id) {
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+ case HTTP_EVENT_ERROR:
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+ http_context->callback(NULL, 0, http_context->user_context);
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+ http_context->abort = true;
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+ break;
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+ case HTTP_EVENT_ON_HEADER:
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+ if (!strcasecmp(evt->header_key, "Content-Length")) {
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+ size_t len = atoi(evt->header_value);
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+ if (!len || len > http_context->max) {
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+ ESP_LOGI(TAG, "content-length null or too large %zu / %zu", len, http_context->max);
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+ http_context->abort = true;
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+ }
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+ }
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+ break;
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+ case HTTP_EVENT_ON_DATA: {
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+ size_t len = esp_http_client_get_content_length(evt->client);
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+ if (!http_context->data) {
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+ if ((http_context->data = (uint8_t*) malloc(len)) == NULL) {
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+ http_context->abort = true;
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+ ESP_LOGE(TAG, "gailed to allocate memory for output buffer %zu", len);
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+ return ESP_FAIL;
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+ }
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+ }
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+ memcpy(http_context->data + http_context->bytes, evt->data, evt->data_len);
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+ http_context->bytes += evt->data_len;
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+ break;
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+ }
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+ case HTTP_EVENT_ON_FINISH:
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+ http_context->callback(http_context->data, http_context->bytes, http_context->user_context);
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+ break;
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+ case HTTP_EVENT_DISCONNECTED: {
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+ int mbedtls_err = 0;
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+ esp_err_t err = esp_tls_get_and_clear_last_error(evt->data, &mbedtls_err, NULL);
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+ if (err != ESP_OK) {
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+ ESP_LOGE(TAG, "HTTP download disconnect %d", err);
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+ if (http_context->data) free(http_context->data);
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+ http_context->callback(NULL, 0, http_context->user_context);
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+ return ESP_FAIL;
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+ }
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+ break;
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+ default:
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+ break;
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+ }
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+ }
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+
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+ return ESP_OK;
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+}
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+
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Philippe G