131 lines
3.7 KiB
C
131 lines
3.7 KiB
C
/* http_get - Retrieves a web page over HTTP GET.
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*
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* See http_get_ssl for a TLS-enabled version.
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*
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* This sample code is in the public domain.,
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*/
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#include "espressif/esp_common.h"
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#include "espressif/sdk_private.h"
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#include "FreeRTOS.h"
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#include "task.h"
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#include "lwip/err.h"
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#include "lwip/sockets.h"
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#include "lwip/sys.h"
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#include "lwip/netdb.h"
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#include "lwip/dns.h"
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#define WEB_SERVER "chainxor.org"
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#define WEB_PORT 80
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#define WEB_URL "http://chainxor.org/"
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#if !defined(WIFI_SSID) || !defined(WIFI_PASS)
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#error "Please define macros WIFI_SSID & WIFI_PASS (here, or better in a local.h file at root level or in program dir."
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#endif
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void http_get_task(void *pvParameters)
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{
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int successes = 0, failures = 0;
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printf("HTTP get task starting...\r\n");
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while(1) {
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const struct addrinfo hints = {
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.ai_family = AF_INET,
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.ai_socktype = SOCK_STREAM,
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};
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struct addrinfo *res;
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printf("Running DNS lookup for %s...\r\n", WEB_SERVER);
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int err = getaddrinfo(WEB_SERVER, "80", &hints, &res);
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if(err != 0 || res == NULL) {
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printf("DNS lookup failed err=%d res=%p\r\n", err, res);
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if(res)
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freeaddrinfo(res);
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vTaskDelay(1000 / portTICK_RATE_MS);
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failures++;
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continue;
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}
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/* Note: inet_ntoa is non-reentrant, look at ipaddr_ntoa_r for "real" code */
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struct in_addr *addr = &((struct sockaddr_in *)res->ai_addr)->sin_addr;
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printf("DNS lookup succeeded. IP=%s\r\n", inet_ntoa(*addr));
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int s = socket(res->ai_family, res->ai_socktype, 0);
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if(s < 0) {
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printf("... Failed to allocate socket.\r\n");
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freeaddrinfo(res);
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vTaskDelay(1000 / portTICK_RATE_MS);
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failures++;
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continue;
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}
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printf("... allocated socket\r\n");
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if(connect(s, res->ai_addr, res->ai_addrlen) != 0) {
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close(s);
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freeaddrinfo(res);
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printf("... socket connect failed.\r\n");
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vTaskDelay(4000 / portTICK_RATE_MS);
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failures++;
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continue;
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}
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printf("... connected\r\n");
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freeaddrinfo(res);
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const char *req =
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"GET "WEB_URL"\r\n"
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"User-Agent: esp-open-rtos/0.1 esp8266\r\n"
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"\r\n";
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if (write(s, req, strlen(req)) < 0) {
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printf("... socket send failed\r\n");
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close(s);
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vTaskDelay(4000 / portTICK_RATE_MS);
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failures++;
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continue;
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}
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printf("... socket send success\r\n");
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static char recv_buf[128];
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int r;
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do {
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bzero(recv_buf, 128);
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r = read(s, recv_buf, 127);
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if(r > 0) {
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printf("%s", recv_buf);
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}
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} while(r > 0);
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printf("... done reading from socket. Last read return=%d errno=%d\r\n", r, errno);
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if(r != 0)
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failures++;
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else
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successes++;
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close(s);
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printf("successes = %d failures = %d\r\n", successes, failures);
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for(int countdown = 10; countdown >= 0; countdown--) {
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printf("%d... ", countdown);
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vTaskDelay(1000 / portTICK_RATE_MS);
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}
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printf("\r\nStarting again!\r\n");
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}
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}
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void user_init(void)
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{
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sdk_uart_div_modify(0, UART_CLK_FREQ / 115200);
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printf("SDK version:%s\n", sdk_system_get_sdk_version());
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struct sdk_station_config config = {
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.ssid = WIFI_SSID,
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.password = WIFI_PASS,
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};
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/* required to call wifi_set_opmode before station_set_config */
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sdk_wifi_set_opmode(STATION_MODE);
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sdk_wifi_station_set_config(&config);
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xTaskCreate(&http_get_task, (signed char *)"get_task", 256, NULL, 2, NULL);
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}
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