基于ESP-IDF4.1
#include <string.h> #include <stdlib.h> #include "freertos/FreeRTOS.h" #include "freertos/task.h" #include "esp_log.h" #include "esp_system.h" #include "nvs_flash.h" #include "esp_event.h" #include "esp_netif.h" #include "protocol_examples_common.h" #include "esp_tls.h" #include "esp_http_client.h" #define MAX_HTTP_RECV_BUFFER 512 static const char *TAG = "HTTP_CLIENT"; //Http事件处理程序 esp_err_t _http_event_handler(esp_http_client_event_t *evt) { switch(evt->event_id) { case HTTP_EVENT_ERROR: ESP_LOGD(TAG, "HTTP_EVENT_ERROR"); break; case HTTP_EVENT_ON_CONNECTED: ESP_LOGD(TAG, "HTTP_EVENT_ON_CONNECTED"); break; case HTTP_EVENT_HEADER_SENT: ESP_LOGD(TAG, "HTTP_EVENT_HEADER_SENT"); break; case HTTP_EVENT_ON_HEADER: ESP_LOGD(TAG, "HTTP_EVENT_ON_HEADER, key=%s, value=%s", evt->header_key, evt->header_value); break; case HTTP_EVENT_ON_DATA: ESP_LOGD(TAG, "HTTP_EVENT_ON_DATA, len=%d", evt->data_len); if (!esp_http_client_is_chunked_response(evt->client)) { // Write out data // printf("%.*s", evt->data_len, (char*)evt->data); } break; case HTTP_EVENT_ON_FINISH: ESP_LOGD(TAG, "HTTP_EVENT_ON_FINISH"); break; case HTTP_EVENT_DISCONNECTED: ESP_LOGI(TAG, "HTTP_EVENT_DISCONNECTED"); int mbedtls_err = 0; esp_err_t err = esp_tls_get_and_clear_last_error(evt->data, &mbedtls_err, NULL); if (err != 0) { ESP_LOGI(TAG, "Last esp error code: 0x%x", err); ESP_LOGI(TAG, "Last mbedtls failure: 0x%x", mbedtls_err); } break; } return ESP_OK; } static void http_rest_with_url(void) { esp_http_client_config_t config = { .url = "http://httpbin.org/get", .event_handler = _http_event_handler, }; esp_http_client_handle_t client = esp_http_client_init(&config); // GET esp_err_t err = esp_http_client_perform(client); if (err == ESP_OK) { ESP_LOGI(TAG, "HTTP GET Status = %d, content_length = %d", esp_http_client_get_status_code(client), esp_http_client_get_content_length(client)); } else { ESP_LOGE(TAG, "HTTP GET request failed: %s", esp_err_to_name(err)); } // POST const char *post_data = "field1=value1&field2=value2"; esp_http_client_set_url(client, "http://httpbin.org/post"); esp_http_client_set_method(client, HTTP_METHOD_POST); esp_http_client_set_post_field(client, post_data, strlen(post_data)); err = esp_http_client_perform(client); if (err == ESP_OK) { ESP_LOGI(TAG, "HTTP POST Status = %d, content_length = %d", esp_http_client_get_status_code(client), esp_http_client_get_content_length(client)); } else { ESP_LOGE(TAG, "HTTP POST request failed: %s", esp_err_to_name(err)); } //PUT esp_http_client_set_url(client, "http://httpbin.org/put"); esp_http_client_set_method(client, HTTP_METHOD_PUT); err = esp_http_client_perform(client); if (err == ESP_OK) { ESP_LOGI(TAG, "HTTP PUT Status = %d, content_length = %d", esp_http_client_get_status_code(client), esp_http_client_get_content_length(client)); } else { ESP_LOGE(TAG, "HTTP PUT request failed: %s", esp_err_to_name(err)); } //PATCH esp_http_client_set_url(client, "http://httpbin.org/patch"); esp_http_client_set_method(client, HTTP_METHOD_PATCH); esp_http_client_set_post_field(client, NULL, 0); err = esp_http_client_perform(client); if (err == ESP_OK) { ESP_LOGI(TAG, "HTTP PATCH Status = %d, content_length = %d", esp_http_client_get_status_code(client), esp_http_client_get_content_length(client)); } else { ESP_LOGE(TAG, "HTTP PATCH request failed: %s", esp_err_to_name(err)); } //DELETE esp_http_client_set_url(client, "http://httpbin.org/delete"); esp_http_client_set_method(client, HTTP_METHOD_DELETE); err = esp_http_client_perform(client); if (err == ESP_OK) { ESP_LOGI(TAG, "HTTP DELETE Status = %d, content_length = %d", esp_http_client_get_status_code(client), esp_http_client_get_content_length(client)); } else { ESP_LOGE(TAG, "HTTP DELETE request failed: %s", esp_err_to_name(err)); } //HEAD esp_http_client_set_url(client, "http://httpbin.org/get"); esp_http_client_set_method(client, HTTP_METHOD_HEAD); err = esp_http_client_perform(client); if (err == ESP_OK) { ESP_LOGI(TAG, "HTTP HEAD Status = %d, content_length = %d", esp_http_client_get_status_code(client), esp_http_client_get_content_length(client)); } else { ESP_LOGE(TAG, "HTTP HEAD request failed: %s", esp_err_to_name(err)); } esp_http_client_cleanup(client); } static void http_perform_as_stream_reader(void) { char *buffer = malloc(MAX_HTTP_RECV_BUFFER + 1); if (buffer == NULL) { ESP_LOGE(TAG, "Cannot malloc http receive buffer"); return; } esp_http_client_config_t config = { .url = "http://httpbin.org/get", .event_handler = _http_event_handler, }; esp_http_client_handle_t client = esp_http_client_init(&config); 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); } //任务 static void http_test_task(void *pvParameters) { http_rest_with_url(); http_perform_as_stream_reader(); 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()); //连接网络 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); }
原文：https://gitee.com/EspressifSystems/esp-idf