esp_netif_init() returns standard esp_err_t error code (unlike tcpip_adapter init), so shall be checked for the return value Also to make the initialization code more consistent.
555 lines
20 KiB
C
555 lines
20 KiB
C
/* ESP HTTP Client Example
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This example code is in the Public Domain (or CC0 licensed, at your option.)
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Unless required by applicable law or agreed to in writing, this
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software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
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CONDITIONS OF ANY KIND, either express or implied.
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*/
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#include <string.h>
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#include <stdlib.h>
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#include "esp_log.h"
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#include "esp_system.h"
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#include "nvs_flash.h"
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#include "esp_event.h"
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#include "esp_netif.h"
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#include "protocol_examples_common.h"
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#include "esp_tls.h"
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#include "esp_http_client.h"
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#define MAX_HTTP_RECV_BUFFER 512
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static const char *TAG = "HTTP_CLIENT";
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/* Root cert for howsmyssl.com, taken from howsmyssl_com_root_cert.pem
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The PEM file was extracted from the output of this command:
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openssl s_client -showcerts -connect www.howsmyssl.com:443 </dev/null
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The CA root cert is the last cert given in the chain of certs.
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To embed it in the app binary, the PEM file is named
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in the component.mk COMPONENT_EMBED_TXTFILES variable.
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*/
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extern const char howsmyssl_com_root_cert_pem_start[] asm("_binary_howsmyssl_com_root_cert_pem_start");
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extern const char howsmyssl_com_root_cert_pem_end[] asm("_binary_howsmyssl_com_root_cert_pem_end");
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esp_err_t _http_event_handler(esp_http_client_event_t *evt)
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{
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switch(evt->event_id) {
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case HTTP_EVENT_ERROR:
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ESP_LOGD(TAG, "HTTP_EVENT_ERROR");
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break;
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case HTTP_EVENT_ON_CONNECTED:
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ESP_LOGD(TAG, "HTTP_EVENT_ON_CONNECTED");
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break;
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case HTTP_EVENT_HEADER_SENT:
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ESP_LOGD(TAG, "HTTP_EVENT_HEADER_SENT");
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break;
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case HTTP_EVENT_ON_HEADER:
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ESP_LOGD(TAG, "HTTP_EVENT_ON_HEADER, key=%s, value=%s", evt->header_key, evt->header_value);
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break;
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case HTTP_EVENT_ON_DATA:
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ESP_LOGD(TAG, "HTTP_EVENT_ON_DATA, len=%d", evt->data_len);
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if (!esp_http_client_is_chunked_response(evt->client)) {
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// Write out data
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// printf("%.*s", evt->data_len, (char*)evt->data);
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}
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break;
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case HTTP_EVENT_ON_FINISH:
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ESP_LOGD(TAG, "HTTP_EVENT_ON_FINISH");
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break;
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case HTTP_EVENT_DISCONNECTED:
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ESP_LOGI(TAG, "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 != 0) {
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ESP_LOGI(TAG, "Last esp error code: 0x%x", err);
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ESP_LOGI(TAG, "Last mbedtls failure: 0x%x", mbedtls_err);
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}
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break;
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}
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return ESP_OK;
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}
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static void http_rest_with_url(void)
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{
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esp_http_client_config_t config = {
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.url = "http://httpbin.org/get",
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.event_handler = _http_event_handler,
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};
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esp_http_client_handle_t client = esp_http_client_init(&config);
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// GET
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esp_err_t err = esp_http_client_perform(client);
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if (err == ESP_OK) {
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ESP_LOGI(TAG, "HTTP GET Status = %d, content_length = %d",
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esp_http_client_get_status_code(client),
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esp_http_client_get_content_length(client));
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} else {
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ESP_LOGE(TAG, "HTTP GET request failed: %s", esp_err_to_name(err));
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}
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// POST
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const char *post_data = "field1=value1&field2=value2";
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esp_http_client_set_url(client, "http://httpbin.org/post");
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esp_http_client_set_method(client, HTTP_METHOD_POST);
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esp_http_client_set_post_field(client, post_data, strlen(post_data));
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err = esp_http_client_perform(client);
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if (err == ESP_OK) {
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ESP_LOGI(TAG, "HTTP POST Status = %d, content_length = %d",
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esp_http_client_get_status_code(client),
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esp_http_client_get_content_length(client));
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} else {
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ESP_LOGE(TAG, "HTTP POST request failed: %s", esp_err_to_name(err));
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}
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//PUT
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esp_http_client_set_url(client, "http://httpbin.org/put");
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esp_http_client_set_method(client, HTTP_METHOD_PUT);
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err = esp_http_client_perform(client);
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if (err == ESP_OK) {
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ESP_LOGI(TAG, "HTTP PUT Status = %d, content_length = %d",
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esp_http_client_get_status_code(client),
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esp_http_client_get_content_length(client));
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} else {
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ESP_LOGE(TAG, "HTTP PUT request failed: %s", esp_err_to_name(err));
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}
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//PATCH
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esp_http_client_set_url(client, "http://httpbin.org/patch");
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esp_http_client_set_method(client, HTTP_METHOD_PATCH);
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esp_http_client_set_post_field(client, NULL, 0);
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err = esp_http_client_perform(client);
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if (err == ESP_OK) {
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ESP_LOGI(TAG, "HTTP PATCH Status = %d, content_length = %d",
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esp_http_client_get_status_code(client),
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esp_http_client_get_content_length(client));
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} else {
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ESP_LOGE(TAG, "HTTP PATCH request failed: %s", esp_err_to_name(err));
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}
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//DELETE
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esp_http_client_set_url(client, "http://httpbin.org/delete");
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esp_http_client_set_method(client, HTTP_METHOD_DELETE);
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err = esp_http_client_perform(client);
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if (err == ESP_OK) {
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ESP_LOGI(TAG, "HTTP DELETE Status = %d, content_length = %d",
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esp_http_client_get_status_code(client),
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esp_http_client_get_content_length(client));
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} else {
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ESP_LOGE(TAG, "HTTP DELETE request failed: %s", esp_err_to_name(err));
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}
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//HEAD
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esp_http_client_set_url(client, "http://httpbin.org/get");
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esp_http_client_set_method(client, HTTP_METHOD_HEAD);
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err = esp_http_client_perform(client);
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if (err == ESP_OK) {
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ESP_LOGI(TAG, "HTTP HEAD Status = %d, content_length = %d",
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esp_http_client_get_status_code(client),
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esp_http_client_get_content_length(client));
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} else {
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ESP_LOGE(TAG, "HTTP HEAD request failed: %s", esp_err_to_name(err));
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}
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esp_http_client_cleanup(client);
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}
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static void http_rest_with_hostname_path(void)
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{
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esp_http_client_config_t config = {
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.host = "httpbin.org",
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.path = "/get",
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.transport_type = HTTP_TRANSPORT_OVER_TCP,
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.event_handler = _http_event_handler,
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};
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esp_http_client_handle_t client = esp_http_client_init(&config);
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// GET
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esp_err_t err = esp_http_client_perform(client);
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if (err == ESP_OK) {
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ESP_LOGI(TAG, "HTTP GET Status = %d, content_length = %d",
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esp_http_client_get_status_code(client),
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esp_http_client_get_content_length(client));
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} else {
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ESP_LOGE(TAG, "HTTP GET request failed: %s", esp_err_to_name(err));
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}
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// POST
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const char *post_data = "field1=value1&field2=value2";
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esp_http_client_set_url(client, "/post");
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esp_http_client_set_method(client, HTTP_METHOD_POST);
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esp_http_client_set_post_field(client, post_data, strlen(post_data));
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err = esp_http_client_perform(client);
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if (err == ESP_OK) {
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ESP_LOGI(TAG, "HTTP POST Status = %d, content_length = %d",
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esp_http_client_get_status_code(client),
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esp_http_client_get_content_length(client));
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} else {
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ESP_LOGE(TAG, "HTTP POST request failed: %s", esp_err_to_name(err));
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}
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//PUT
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esp_http_client_set_url(client, "/put");
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esp_http_client_set_method(client, HTTP_METHOD_PUT);
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err = esp_http_client_perform(client);
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if (err == ESP_OK) {
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ESP_LOGI(TAG, "HTTP PUT Status = %d, content_length = %d",
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esp_http_client_get_status_code(client),
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esp_http_client_get_content_length(client));
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} else {
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ESP_LOGE(TAG, "HTTP PUT request failed: %s", esp_err_to_name(err));
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}
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//PATCH
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esp_http_client_set_url(client, "/patch");
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esp_http_client_set_method(client, HTTP_METHOD_PATCH);
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esp_http_client_set_post_field(client, NULL, 0);
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err = esp_http_client_perform(client);
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if (err == ESP_OK) {
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ESP_LOGI(TAG, "HTTP PATCH Status = %d, content_length = %d",
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esp_http_client_get_status_code(client),
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esp_http_client_get_content_length(client));
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} else {
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ESP_LOGE(TAG, "HTTP PATCH request failed: %s", esp_err_to_name(err));
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}
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//DELETE
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esp_http_client_set_url(client, "/delete");
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esp_http_client_set_method(client, HTTP_METHOD_DELETE);
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err = esp_http_client_perform(client);
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if (err == ESP_OK) {
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ESP_LOGI(TAG, "HTTP DELETE Status = %d, content_length = %d",
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esp_http_client_get_status_code(client),
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esp_http_client_get_content_length(client));
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} else {
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ESP_LOGE(TAG, "HTTP DELETE request failed: %s", esp_err_to_name(err));
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}
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//HEAD
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esp_http_client_set_url(client, "/get");
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esp_http_client_set_method(client, HTTP_METHOD_HEAD);
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err = esp_http_client_perform(client);
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if (err == ESP_OK) {
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ESP_LOGI(TAG, "HTTP HEAD Status = %d, content_length = %d",
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esp_http_client_get_status_code(client),
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esp_http_client_get_content_length(client));
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} else {
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ESP_LOGE(TAG, "HTTP HEAD request failed: %s", esp_err_to_name(err));
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}
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esp_http_client_cleanup(client);
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}
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static void http_auth_basic(void)
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{
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esp_http_client_config_t config = {
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.url = "http://user:passwd@httpbin.org/basic-auth/user/passwd",
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.event_handler = _http_event_handler,
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.auth_type = HTTP_AUTH_TYPE_BASIC,
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};
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esp_http_client_handle_t client = esp_http_client_init(&config);
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esp_err_t err = esp_http_client_perform(client);
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if (err == ESP_OK) {
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ESP_LOGI(TAG, "HTTP Basic Auth Status = %d, content_length = %d",
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esp_http_client_get_status_code(client),
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esp_http_client_get_content_length(client));
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} else {
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ESP_LOGE(TAG, "Error perform http request %s", esp_err_to_name(err));
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}
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esp_http_client_cleanup(client);
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}
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static void http_auth_basic_redirect(void)
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{
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esp_http_client_config_t config = {
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.url = "http://user:passwd@httpbin.org/basic-auth/user/passwd",
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.event_handler = _http_event_handler,
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};
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esp_http_client_handle_t client = esp_http_client_init(&config);
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esp_err_t err = esp_http_client_perform(client);
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if (err == ESP_OK) {
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ESP_LOGI(TAG, "HTTP Basic Auth redirect Status = %d, content_length = %d",
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esp_http_client_get_status_code(client),
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esp_http_client_get_content_length(client));
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} else {
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ESP_LOGE(TAG, "Error perform http request %s", esp_err_to_name(err));
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}
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esp_http_client_cleanup(client);
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}
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static void http_auth_digest(void)
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{
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esp_http_client_config_t config = {
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.url = "http://user:passwd@httpbin.org/digest-auth/auth/user/passwd/MD5/never",
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.event_handler = _http_event_handler,
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};
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esp_http_client_handle_t client = esp_http_client_init(&config);
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esp_err_t err = esp_http_client_perform(client);
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if (err == ESP_OK) {
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ESP_LOGI(TAG, "HTTP Digest Auth Status = %d, content_length = %d",
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esp_http_client_get_status_code(client),
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esp_http_client_get_content_length(client));
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} else {
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ESP_LOGE(TAG, "Error perform http request %s", esp_err_to_name(err));
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}
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esp_http_client_cleanup(client);
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}
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static void https_with_url(void)
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{
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esp_http_client_config_t config = {
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.url = "https://www.howsmyssl.com",
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.event_handler = _http_event_handler,
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.cert_pem = howsmyssl_com_root_cert_pem_start,
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};
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esp_http_client_handle_t client = esp_http_client_init(&config);
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esp_err_t err = esp_http_client_perform(client);
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if (err == ESP_OK) {
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ESP_LOGI(TAG, "HTTPS Status = %d, content_length = %d",
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esp_http_client_get_status_code(client),
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esp_http_client_get_content_length(client));
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} else {
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ESP_LOGE(TAG, "Error perform http request %s", esp_err_to_name(err));
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}
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esp_http_client_cleanup(client);
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}
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static void https_with_hostname_path(void)
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{
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esp_http_client_config_t config = {
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.host = "www.howsmyssl.com",
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.path = "/",
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.transport_type = HTTP_TRANSPORT_OVER_SSL,
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.event_handler = _http_event_handler,
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.cert_pem = howsmyssl_com_root_cert_pem_start,
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};
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esp_http_client_handle_t client = esp_http_client_init(&config);
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esp_err_t err = esp_http_client_perform(client);
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if (err == ESP_OK) {
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ESP_LOGI(TAG, "HTTPS Status = %d, content_length = %d",
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esp_http_client_get_status_code(client),
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esp_http_client_get_content_length(client));
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} else {
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ESP_LOGE(TAG, "Error perform http request %s", esp_err_to_name(err));
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}
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esp_http_client_cleanup(client);
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}
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static void http_relative_redirect(void)
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{
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esp_http_client_config_t config = {
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.url = "http://httpbin.org/relative-redirect/3",
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.event_handler = _http_event_handler,
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};
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esp_http_client_handle_t client = esp_http_client_init(&config);
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esp_err_t err = esp_http_client_perform(client);
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if (err == ESP_OK) {
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ESP_LOGI(TAG, "HTTP Relative path redirect Status = %d, content_length = %d",
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esp_http_client_get_status_code(client),
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esp_http_client_get_content_length(client));
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} else {
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ESP_LOGE(TAG, "Error perform http request %s", esp_err_to_name(err));
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}
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esp_http_client_cleanup(client);
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}
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static void http_absolute_redirect(void)
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{
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esp_http_client_config_t config = {
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.url = "http://httpbin.org/absolute-redirect/3",
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.event_handler = _http_event_handler,
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};
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esp_http_client_handle_t client = esp_http_client_init(&config);
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esp_err_t err = esp_http_client_perform(client);
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if (err == ESP_OK) {
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ESP_LOGI(TAG, "HTTP Absolute path redirect Status = %d, content_length = %d",
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esp_http_client_get_status_code(client),
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esp_http_client_get_content_length(client));
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} else {
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ESP_LOGE(TAG, "Error perform http request %s", esp_err_to_name(err));
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}
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esp_http_client_cleanup(client);
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}
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static void http_redirect_to_https(void)
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{
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esp_http_client_config_t config = {
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.url = "http://httpbin.org/redirect-to?url=https%3A%2F%2Fwww.howsmyssl.com",
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.event_handler = _http_event_handler,
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};
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esp_http_client_handle_t client = esp_http_client_init(&config);
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esp_err_t err = esp_http_client_perform(client);
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if (err == ESP_OK) {
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ESP_LOGI(TAG, "HTTP redirect to HTTPS Status = %d, content_length = %d",
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esp_http_client_get_status_code(client),
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esp_http_client_get_content_length(client));
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} else {
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ESP_LOGE(TAG, "Error perform http request %s", esp_err_to_name(err));
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}
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esp_http_client_cleanup(client);
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}
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static void http_download_chunk(void)
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{
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esp_http_client_config_t config = {
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.url = "http://httpbin.org/stream-bytes/8912",
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.event_handler = _http_event_handler,
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};
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esp_http_client_handle_t client = esp_http_client_init(&config);
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esp_err_t err = esp_http_client_perform(client);
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if (err == ESP_OK) {
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ESP_LOGI(TAG, "HTTP chunk encoding Status = %d, content_length = %d",
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esp_http_client_get_status_code(client),
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esp_http_client_get_content_length(client));
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} else {
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ESP_LOGE(TAG, "Error perform http request %s", esp_err_to_name(err));
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}
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esp_http_client_cleanup(client);
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}
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static void http_perform_as_stream_reader(void)
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{
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char *buffer = malloc(MAX_HTTP_RECV_BUFFER + 1);
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if (buffer == NULL) {
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ESP_LOGE(TAG, "Cannot malloc http receive buffer");
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return;
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}
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esp_http_client_config_t config = {
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.url = "http://httpbin.org/get",
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.event_handler = _http_event_handler,
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};
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esp_http_client_handle_t client = esp_http_client_init(&config);
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|
esp_err_t err;
|
|
if ((err = esp_http_client_open(client, 0)) != ESP_OK) {
|
|
ESP_LOGE(TAG, "Failed to open HTTP connection: %s", esp_err_to_name(err));
|
|
free(buffer);
|
|
return;
|
|
}
|
|
int content_length = esp_http_client_fetch_headers(client);
|
|
int total_read_len = 0, read_len;
|
|
if (total_read_len < content_length && content_length <= MAX_HTTP_RECV_BUFFER) {
|
|
read_len = esp_http_client_read(client, buffer, content_length);
|
|
if (read_len <= 0) {
|
|
ESP_LOGE(TAG, "Error read data");
|
|
}
|
|
buffer[read_len] = 0;
|
|
ESP_LOGD(TAG, "read_len = %d", read_len);
|
|
}
|
|
ESP_LOGI(TAG, "HTTP Stream reader Status = %d, content_length = %d",
|
|
esp_http_client_get_status_code(client),
|
|
esp_http_client_get_content_length(client));
|
|
esp_http_client_close(client);
|
|
esp_http_client_cleanup(client);
|
|
free(buffer);
|
|
}
|
|
|
|
static void https_async(void)
|
|
{
|
|
esp_http_client_config_t config = {
|
|
.url = "https://postman-echo.com/post",
|
|
.event_handler = _http_event_handler,
|
|
.is_async = true,
|
|
.timeout_ms = 5000,
|
|
};
|
|
esp_http_client_handle_t client = esp_http_client_init(&config);
|
|
esp_err_t err;
|
|
const char *post_data = "Using a Palantír requires a person with great strength of will and wisdom. The Palantíri were meant to "
|
|
"be used by the Dúnedain to communicate throughout the Realms in Exile. During the War of the Ring, "
|
|
"the Palantíri were used by many individuals. Sauron used the Ithil-stone to take advantage of the users "
|
|
"of the other two stones, the Orthanc-stone and Anor-stone, but was also susceptible to deception himself.";
|
|
esp_http_client_set_method(client, HTTP_METHOD_POST);
|
|
esp_http_client_set_post_field(client, post_data, strlen(post_data));
|
|
while (1) {
|
|
err = esp_http_client_perform(client);
|
|
if (err != ESP_ERR_HTTP_EAGAIN) {
|
|
break;
|
|
}
|
|
}
|
|
if (err == ESP_OK) {
|
|
ESP_LOGI(TAG, "HTTPS Status = %d, content_length = %d",
|
|
esp_http_client_get_status_code(client),
|
|
esp_http_client_get_content_length(client));
|
|
} else {
|
|
ESP_LOGE(TAG, "Error perform http request %s", esp_err_to_name(err));
|
|
}
|
|
esp_http_client_cleanup(client);
|
|
}
|
|
|
|
static void https_with_invalid_url(void)
|
|
{
|
|
esp_http_client_config_t config = {
|
|
.url = "https://not.existent.url",
|
|
.event_handler = _http_event_handler,
|
|
};
|
|
esp_http_client_handle_t client = esp_http_client_init(&config);
|
|
esp_err_t err = esp_http_client_perform(client);
|
|
|
|
if (err == ESP_OK) {
|
|
ESP_LOGI(TAG, "HTTPS Status = %d, content_length = %d",
|
|
esp_http_client_get_status_code(client),
|
|
esp_http_client_get_content_length(client));
|
|
} else {
|
|
ESP_LOGE(TAG, "Error perform http request %s", esp_err_to_name(err));
|
|
}
|
|
esp_http_client_cleanup(client);
|
|
}
|
|
|
|
|
|
static void http_test_task(void *pvParameters)
|
|
{
|
|
http_rest_with_url();
|
|
http_rest_with_hostname_path();
|
|
http_auth_basic();
|
|
http_auth_basic_redirect();
|
|
http_auth_digest();
|
|
http_relative_redirect();
|
|
http_absolute_redirect();
|
|
https_with_url();
|
|
https_with_hostname_path();
|
|
http_redirect_to_https();
|
|
http_download_chunk();
|
|
http_perform_as_stream_reader();
|
|
https_async();
|
|
https_with_invalid_url();
|
|
|
|
ESP_LOGI(TAG, "Finish http example");
|
|
vTaskDelete(NULL);
|
|
}
|
|
|
|
void app_main(void)
|
|
{
|
|
esp_err_t ret = nvs_flash_init();
|
|
if (ret == ESP_ERR_NVS_NO_FREE_PAGES || ret == ESP_ERR_NVS_NEW_VERSION_FOUND) {
|
|
ESP_ERROR_CHECK(nvs_flash_erase());
|
|
ret = nvs_flash_init();
|
|
}
|
|
ESP_ERROR_CHECK(ret);
|
|
ESP_ERROR_CHECK(esp_netif_init());
|
|
ESP_ERROR_CHECK(esp_event_loop_create_default());
|
|
|
|
/* This helper function configures Wi-Fi or Ethernet, as selected in menuconfig.
|
|
* Read "Establishing Wi-Fi or Ethernet Connection" section in
|
|
* examples/protocols/README.md for more information about this function.
|
|
*/
|
|
ESP_ERROR_CHECK(example_connect());
|
|
ESP_LOGI(TAG, "Connected to AP, begin http example");
|
|
|
|
xTaskCreate(&http_test_task, "http_test_task", 8192, NULL, 5, NULL);
|
|
}
|