#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <curl/curl.h>
static int send_msg(CURL *curl, const char *send_payload)
{
size_t sent;
CURLcode result = curl_ws_send(curl, send_payload, strlen(send_payload), &sent, 0,CURLWS_TEXT);
return (int)result;
}
static int recv_pong(CURL *curl, const char *expected_payload)
{
size_t rlen;
const struct curl_ws_frame *meta;
char buffer[256];
CURLcode result = curl_ws_recv(curl, buffer, sizeof(buffer), &rlen, &meta);
if(!result) {
if(meta->flags & CURLWS_PONG) {
int same = 0;
fprintf(stderr, "ws: got PONG back\n");
if(rlen == strlen(expected_payload)) {
if(!memcmp(expected_payload, buffer, rlen)) {
fprintf(stderr, "ws: got the same payload back\n");
same = 1;
}
}
if(!same)
fprintf(stderr, "ws: did NOT get the same payload back\n");
}
else {
fprintf(stderr, "recv_pong: got %u bytes rflags %x\n", (int)rlen,
meta->flags);
}
}
fprintf(stderr, "ws: curl_ws_recv returned %u, received %u\n",
(unsigned int)result, (unsigned int)rlen);
return (int)result;
}
static int recv_any(CURL *curl)
{
size_t rlen;
const struct curl_ws_frame *meta;
char buffer[256];
CURLcode result = curl_ws_recv(curl, buffer, sizeof(buffer), &rlen, &meta);
if(result)
return result;
return 0;
}
/* close the connection */
static void websocket_close(CURL *curl)
{
size_t sent;
(void)curl_ws_send(curl, "", 0, &sent, 0, CURLWS_CLOSE);
}
static void websocket(CURL *curl)
{
int i = 0;
do {
recv_any(curl);
if(recv_pong(curl, "foobar")) {
return;
}
sleep(2);
} while(i++ < 10);
websocket_close(curl);
}
int main(void)
{
CURL *curl;
CURLcode res;
curl = curl_easy_init();
struct curl_slist *list = NULL;
list = curl_slist_append(list, "Sec-WebSocket-Protocol: graphql-transport-ws");
list = curl_slist_append(list, "User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/111.0.0.0 Safari/537.36");
if(curl) {
curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
curl_easy_setopt(curl, CURLOPT_URL, "wss://api.csgoroll.com/graphql");
curl_easy_setopt(curl, CURLOPT_HTTPHEADER, list);
// curl_slist_free_all(list);
curl_easy_setopt(curl, CURLOPT_CONNECT_ONLY, 2L); /* websocket style */
/* Perform the request, res will get the return code */
res = curl_easy_perform(curl);
/* Check for errors */
if(res != CURLE_OK)
fprintf(stderr, "curl_easy_perform() failed: %s\n",
curl_easy_strerror(res));
else {
send_msg(curl, "{\"type\":\"connection_init\"}");
/* connected and ready */
websocket(curl);
}
/* always cleanup */
curl_easy_cleanup(curl);
}
return 0;
}