145 lines
3.9 KiB
C
145 lines
3.9 KiB
C
/* HTTP2 GET Example using nghttp2
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Contacts http2.golang.org and executes the GET/PUT requests. A thin API
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wrapper on top of nghttp2, to properly demonstrate the interactions.
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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 <sys/time.h>
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#include "esp_wifi.h"
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#include "esp_event.h"
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#include "lwip/apps/sntp.h"
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#include "esp_system.h"
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#include "nvs_flash.h"
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#include "protocol_examples_common.h"
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#include "tcpip_adapter.h"
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#include "sh2lib.h"
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/* The HTTP/2 server to connect to */
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#define HTTP2_SERVER_URI "https://http2.golang.org"
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/* A GET request that keeps streaming current time every second */
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#define HTTP2_STREAMING_GET_PATH "/clockstream"
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/* A PUT request that echoes whatever we had sent to it */
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#define HTTP2_PUT_PATH "/ECHO"
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int handle_get_response(struct sh2lib_handle *handle, const char *data, size_t len, int flags)
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{
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if (len) {
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printf("[get-response] %.*s\n", len, data);
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}
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if (flags == DATA_RECV_FRAME_COMPLETE) {
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printf("[get-response] Frame fully received\n");
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}
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if (flags == DATA_RECV_RST_STREAM) {
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printf("[get-response] Stream Closed\n");
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}
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return 0;
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}
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int handle_echo_response(struct sh2lib_handle *handle, const char *data, size_t len, int flags)
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{
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if (len) {
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printf("[echo-response] %.*s\n", len, data);
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}
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if (flags == DATA_RECV_FRAME_COMPLETE) {
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printf("[echo-response] Frame fully received\n");
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}
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if (flags == DATA_RECV_RST_STREAM) {
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printf("[echo-response] Stream Closed\n");
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}
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return 0;
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}
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int send_put_data(struct sh2lib_handle *handle, char *buf, size_t length, uint32_t *data_flags)
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{
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#define DATA_TO_SEND "Hello World"
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int copylen = strlen(DATA_TO_SEND);
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if (copylen < length) {
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printf("[data-prvd] Sending %d bytes\n", copylen);
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memcpy(buf, DATA_TO_SEND, copylen);
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} else {
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copylen = 0;
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}
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(*data_flags) |= NGHTTP2_DATA_FLAG_EOF;
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return copylen;
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}
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static void set_time(void)
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{
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struct timeval tv = {
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.tv_sec = 1509449941,
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};
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struct timezone tz = {
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0, 0
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};
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settimeofday(&tv, &tz);
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/* Start SNTP service */
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sntp_setoperatingmode(SNTP_OPMODE_POLL);
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sntp_init();
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}
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static void http2_task(void *args)
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{
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/* Set current time: proper system time is required for TLS based
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* certificate verification.
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*/
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set_time();
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/* HTTP2: one connection multiple requests. Do the TLS/TCP connection first */
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printf("Connecting to server\n");
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struct sh2lib_handle hd;
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if (sh2lib_connect(&hd, HTTP2_SERVER_URI) != 0) {
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printf("Failed to connect\n");
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vTaskDelete(NULL);
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return;
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}
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printf("Connection done\n");
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/* HTTP GET */
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sh2lib_do_get(&hd, HTTP2_STREAMING_GET_PATH, handle_get_response);
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/* HTTP PUT */
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sh2lib_do_put(&hd, HTTP2_PUT_PATH, send_put_data, handle_echo_response);
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while (1) {
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/* Process HTTP2 send/receive */
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if (sh2lib_execute(&hd) < 0) {
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printf("Error in send/receive\n");
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break;
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}
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vTaskDelay(2);
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}
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sh2lib_free(&hd);
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vTaskDelete(NULL);
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}
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void app_main()
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{
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ESP_ERROR_CHECK( nvs_flash_init() );
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tcpip_adapter_init();
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ESP_ERROR_CHECK(esp_event_loop_create_default());
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/* This helper function configures Wi-Fi or Ethernet, as selected in menuconfig.
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* Read "Establishing Wi-Fi or Ethernet Connection" section in
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* examples/protocols/README.md for more information about this function.
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*/
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ESP_ERROR_CHECK(example_connect());
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xTaskCreate(&http2_task, "http2_task", (1024 * 32), NULL, 5, NULL);
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}
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