example.c

void DoWhatever() {
    char headerBuffer[1024];

    strcpy(headerBuffer, "GET /settings.php HTTP/1.0\r\n");
    strcat(headerBuffer, "Host: 127.0.0.1\r\n"); //change to server IP
    strcat(headerBuffer, "SID: AAAA-AAAA-AAAA-AAAA\r\n"); //change to the user's key
    strcat(headerBuffer, "User-Agent: PS3"); //not neccessary but you could do server checks to make sure its from PS3
    strcat(headerBuffer, "\r\n\r\n"); //end the HTTP header

    char *response = SendRequest(headerBuffer);

    if (response == NULL) {
        return;
    }

    //Process the response data since it's not null
}


//Sends a HTTP request
char *SendRequest(char* headerBuffer) {
    int sock;
    struct hostent *host;
    struct sockaddr_in sockaddr;

    sockaddr.sin_family = AF_INET;
    sockaddr.sin_port = htons(80);
    sockaddr.sin_addr.s_addr = inet_addr("127.0.0.1"); //change to server IP

    sock = socket(AF_INET, SOCK_STREAM, 0);

    if (connect(sock, (struct sockaddr *)&sockaddr, sizeof(sockaddr)) != 0) {
        return NULL;
    }

    send(sock, headerBuffer, strlen(headerBuffer), 0);

    char responseBuffer[2048]; //adjust as necessary

    while (recv(sock, &responseBuffer, sizeof(responseBuffer), 0) > 0)
    {
    }

    socketclose(sock);

    return responseBuffer;
}